]> git.ipfire.org Git - thirdparty/hostap.git/blob - wpa_supplicant/events.c
projects / thirdparty / hostap.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
IBSS RSN: Wait for connection event and do not use auth timeout
[thirdparty/hostap.git] / wpa_supplicant / events.c
1 /*
2 * WPA Supplicant - Driver event processing
3 * Copyright (c) 2003-2009, 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 "rsn_supp/wpa.h"
20 #include "eloop.h"
21 #include "config.h"
22 #include "l2_packet/l2_packet.h"
23 #include "wpa_supplicant_i.h"
24 #include "driver_i.h"
25 #include "pcsc_funcs.h"
26 #include "rsn_supp/preauth.h"
27 #include "rsn_supp/pmksa_cache.h"
28 #include "common/wpa_ctrl.h"
29 #include "eap_peer/eap.h"
30 #include "notify.h"
31 #include "common/ieee802_11_defs.h"
32 #include "blacklist.h"
33 #include "wpas_glue.h"
34 #include "wps_supplicant.h"
35 #include "ibss_rsn.h"
36 #include "sme.h"
37 #include "bgscan.h"
38
39
40 static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
41 {
42 struct wpa_ssid *ssid, *old_ssid;
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 |
65 WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_FT_IEEE8021X |
66 WPA_KEY_MGMT_PSK_SHA256 |
67 WPA_KEY_MGMT_IEEE8021X_SHA256)) {
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);
78 old_ssid = wpa_s->current_ssid;
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);
82 if (old_ssid != wpa_s->current_ssid)
83 wpas_notify_network_changed(wpa_s);
84
85 return 0;
86 }
87
88
89 static 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
103 void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
104 {
105 int bssid_changed;
106
107 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
108 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
109 os_memset(wpa_s->bssid, 0, ETH_ALEN);
110 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
111 if (bssid_changed)
112 wpas_notify_bssid_changed(wpa_s);
113
114 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
115 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
116 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
117 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
118 wpa_s->ap_ies_from_associnfo = 0;
119 }
120
121
122 static 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
147 static 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
166 static 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 */
197 int 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
258 static 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
266 #ifdef CONFIG_WPS
267 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
268 return 1;
269 #endif /* CONFIG_WPS */
270
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
290 static int wpa_supplicant_ssid_bss_match(struct wpa_supplicant *wpa_s,
291 struct wpa_ssid *ssid,
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;
297 int ret;
298
299 ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss);
300 if (ret >= 0)
301 return ret;
302
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
336 if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
337 ssid->ieee80211w == IEEE80211W_REQUIRED) {
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
391 static struct wpa_scan_res *
392 wpa_supplicant_select_bss_wpa(struct wpa_supplicant *wpa_s,
393 struct wpa_ssid *group,
394 struct wpa_ssid **selected_ssid)
395 {
396 struct wpa_ssid *ssid;
397 struct wpa_scan_res *bss;
398 size_t i;
399 struct wpa_blacklist *e;
400 const u8 *ie;
401
402 wpa_printf(MSG_DEBUG, "Try to find WPA-enabled AP");
403 for (i = 0; i < wpa_s->scan_res->num; i++) {
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);
423
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 (ssid_len == 0) {
431 wpa_printf(MSG_DEBUG, " skip - SSID not known");
432 continue;
433 }
434
435 if (wpa_ie_len == 0 && rsn_ie_len == 0) {
436 wpa_printf(MSG_DEBUG, " skip - no WPA/RSN IE");
437 continue;
438 }
439
440 for (ssid = group; ssid; ssid = ssid->pnext) {
441 int check_ssid = 1;
442
443 if (ssid->disabled) {
444 wpa_printf(MSG_DEBUG, " skip - disabled");
445 continue;
446 }
447
448 #ifdef CONFIG_WPS
449 if (ssid->ssid_len == 0 &&
450 wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
451 check_ssid = 0;
452 #endif /* CONFIG_WPS */
453
454 if (check_ssid &&
455 (ssid_len != ssid->ssid_len ||
456 os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
457 wpa_printf(MSG_DEBUG, " skip - "
458 "SSID mismatch");
459 continue;
460 }
461
462 if (ssid->bssid_set &&
463 os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
464 {
465 wpa_printf(MSG_DEBUG, " skip - "
466 "BSSID mismatch");
467 continue;
468 }
469
470 if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
471 continue;
472
473 wpa_printf(MSG_DEBUG, " selected WPA AP "
474 MACSTR " ssid='%s'",
475 MAC2STR(bss->bssid),
476 wpa_ssid_txt(ssid_, ssid_len));
477 *selected_ssid = ssid;
478 return bss;
479 }
480 }
481
482 return NULL;
483 }
484
485
486 static struct wpa_scan_res *
487 wpa_supplicant_select_bss_non_wpa(struct wpa_supplicant *wpa_s,
488 struct wpa_ssid *group,
489 struct wpa_ssid **selected_ssid)
490 {
491 struct wpa_ssid *ssid;
492 struct wpa_scan_res *bss;
493 size_t i;
494 struct wpa_blacklist *e;
495 const u8 *ie;
496
497 wpa_printf(MSG_DEBUG, "Try to find non-WPA AP");
498 for (i = 0; i < wpa_s->scan_res->num; i++) {
499 const u8 *ssid_;
500 u8 wpa_ie_len, rsn_ie_len, ssid_len;
501 bss = wpa_s->scan_res->res[i];
502
503 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
504 ssid_ = ie ? ie + 2 : (u8 *) "";
505 ssid_len = ie ? ie[1] : 0;
506
507 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
508 wpa_ie_len = ie ? ie[1] : 0;
509
510 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
511 rsn_ie_len = ie ? ie[1] : 0;
512
513 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
514 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
515 (int) i, MAC2STR(bss->bssid),
516 wpa_ssid_txt(ssid_, ssid_len),
517 wpa_ie_len, rsn_ie_len, bss->caps);
518
519 e = wpa_blacklist_get(wpa_s, bss->bssid);
520 if (e && e->count > 1) {
521 wpa_printf(MSG_DEBUG, " skip - blacklisted");
522 continue;
523 }
524
525 if (ssid_len == 0) {
526 wpa_printf(MSG_DEBUG, " skip - SSID not known");
527 continue;
528 }
529
530 for (ssid = group; ssid; ssid = ssid->pnext) {
531 int check_ssid = ssid->ssid_len != 0;
532
533 if (ssid->disabled) {
534 wpa_printf(MSG_DEBUG, " skip - disabled");
535 continue;
536 }
537
538 #ifdef CONFIG_WPS
539 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
540 /* Only allow wildcard SSID match if an AP
541 * advertises active WPS operation that matches
542 * with our mode. */
543 check_ssid = 1;
544 if (ssid->ssid_len == 0 &&
545 wpas_wps_ssid_wildcard_ok(wpa_s, ssid,
546 bss))
547 check_ssid = 0;
548 }
549 #endif /* CONFIG_WPS */
550
551 if (check_ssid &&
552 (ssid_len != ssid->ssid_len ||
553 os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
554 wpa_printf(MSG_DEBUG, " skip - "
555 "SSID mismatch");
556 continue;
557 }
558
559 if (ssid->bssid_set &&
560 os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
561 {
562 wpa_printf(MSG_DEBUG, " skip - "
563 "BSSID mismatch");
564 continue;
565 }
566
567 if (!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
568 !(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
569 !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
570 {
571 wpa_printf(MSG_DEBUG, " skip - "
572 "non-WPA network not allowed");
573 continue;
574 }
575
576 if ((ssid->key_mgmt &
577 (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
578 WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK |
579 WPA_KEY_MGMT_IEEE8021X_SHA256 |
580 WPA_KEY_MGMT_PSK_SHA256)) &&
581 (wpa_ie_len != 0 || rsn_ie_len != 0)) {
582 wpa_printf(MSG_DEBUG, " skip - "
583 "WPA network");
584 continue;
585 }
586
587 if (!wpa_supplicant_match_privacy(bss, ssid)) {
588 wpa_printf(MSG_DEBUG, " skip - "
589 "privacy mismatch");
590 continue;
591 }
592
593 if (bss->caps & IEEE80211_CAP_IBSS) {
594 wpa_printf(MSG_DEBUG, " skip - "
595 "IBSS (adhoc) network");
596 continue;
597 }
598
599 wpa_printf(MSG_DEBUG, " selected non-WPA AP "
600 MACSTR " ssid='%s'",
601 MAC2STR(bss->bssid),
602 wpa_ssid_txt(ssid_, ssid_len));
603 *selected_ssid = ssid;
604 return bss;
605 }
606 }
607
608 return NULL;
609 }
610
611
612 static struct wpa_scan_res *
613 wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group,
614 struct wpa_ssid **selected_ssid)
615 {
616 struct wpa_scan_res *selected;
617
618 wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
619 group->priority);
620
621 /* First, try to find WPA-enabled AP */
622 selected = wpa_supplicant_select_bss_wpa(wpa_s, group, selected_ssid);
623 if (selected)
624 return selected;
625
626 /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
627 * allows this. */
628 return wpa_supplicant_select_bss_non_wpa(wpa_s, group, selected_ssid);
629 }
630
631
632 static struct wpa_scan_res *
633 wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,
634 struct wpa_ssid **selected_ssid)
635 {
636 struct wpa_scan_res *selected = NULL;
637 int prio;
638
639 while (selected == NULL) {
640 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
641 selected = wpa_supplicant_select_bss(
642 wpa_s, wpa_s->conf->pssid[prio],
643 selected_ssid);
644 if (selected)
645 break;
646 }
647
648 if (selected == NULL && wpa_s->blacklist) {
649 wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
650 "and try again");
651 wpa_blacklist_clear(wpa_s);
652 wpa_s->blacklist_cleared++;
653 } else if (selected == NULL)
654 break;
655 }
656
657 return selected;
658 }
659
660
661 static void wpa_supplicant_req_new_scan(struct wpa_supplicant *wpa_s,
662 int timeout)
663 {
664 if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
665 /*
666 * Quick recovery if the initial scan results were not
667 * complete when fetched before the first scan request.
668 */
669 wpa_s->scan_res_tried++;
670 timeout = 0;
671 } else if (!wpa_supplicant_enabled_networks(wpa_s->conf)) {
672 /*
673 * No networks are enabled; short-circuit request so
674 * we don't wait timeout seconds before transitioning
675 * to INACTIVE state.
676 */
677 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
678 return;
679 }
680 wpa_supplicant_req_scan(wpa_s, timeout, 0);
681 }
682
683
684 static void wpa_supplicant_connect(struct wpa_supplicant *wpa_s,
685 struct wpa_scan_res *selected,
686 struct wpa_ssid *ssid)
687 {
688 if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
689 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
690 "PBC session overlap");
691 wpa_supplicant_req_new_scan(wpa_s, 10);
692 return;
693 }
694
695 /*
696 * Do not trigger new association unless the BSSID has changed or if
697 * reassociation is requested. If we are in process of associating with
698 * the selected BSSID, do not trigger new attempt.
699 */
700 if (wpa_s->reassociate ||
701 (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
702 (wpa_s->wpa_state != WPA_ASSOCIATING ||
703 os_memcmp(selected->bssid, wpa_s->pending_bssid, ETH_ALEN) !=
704 0))) {
705 if (wpa_supplicant_scard_init(wpa_s, ssid)) {
706 wpa_supplicant_req_new_scan(wpa_s, 10);
707 return;
708 }
709 wpa_supplicant_associate(wpa_s, selected, ssid);
710 } else {
711 wpa_printf(MSG_DEBUG, "Already associated with the selected "
712 "AP");
713 }
714 }
715
716
717 static struct wpa_ssid *
718 wpa_supplicant_pick_new_network(struct wpa_supplicant *wpa_s)
719 {
720 int prio;
721 struct wpa_ssid *ssid;
722
723 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
724 for (ssid = wpa_s->conf->pssid[prio]; ssid; ssid = ssid->pnext)
725 {
726 if (ssid->disabled)
727 continue;
728 if (ssid->mode == IEEE80211_MODE_IBSS ||
729 ssid->mode == IEEE80211_MODE_AP)
730 return ssid;
731 }
732 }
733 return NULL;
734 }
735
736
737 static void wpa_supplicant_rsn_preauth_scan_results(
738 struct wpa_supplicant *wpa_s)
739 {
740 int i;
741
742 if (rsn_preauth_scan_results(wpa_s->wpa) < 0)
743 return;
744
745 for (i = wpa_s->scan_res->num - 1; i >= 0; i--) {
746 const u8 *ssid, *rsn;
747 struct wpa_scan_res *r;
748
749 r = wpa_s->scan_res->res[i];
750
751 ssid = wpa_scan_get_ie(r, WLAN_EID_SSID);
752 if (ssid == NULL)
753 continue;
754
755 rsn = wpa_scan_get_ie(r, WLAN_EID_RSN);
756 if (rsn == NULL)
757 continue;
758
759 rsn_preauth_scan_result(wpa_s->wpa, r->bssid, ssid, rsn);
760 }
761
762 }
763
764
765 static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
766 {
767 struct wpa_scan_res *selected;
768 struct wpa_ssid *ssid = NULL;
769
770 wpa_supplicant_notify_scanning(wpa_s, 0);
771
772 if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
773 if (wpa_s->conf->ap_scan == 2)
774 return;
775 wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
776 "scanning again");
777 wpa_supplicant_req_new_scan(wpa_s, 1);
778 return;
779 }
780
781 /*
782 * Don't post the results if this was the initial cached
783 * and there were no results.
784 */
785 if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1 &&
786 wpa_s->scan_res->num == 0) {
787 wpa_msg(wpa_s, MSG_DEBUG, "Cached scan results are "
788 "empty - not posting");
789 } else {
790 wpa_printf(MSG_DEBUG, "New scan results available");
791 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
792 wpas_notify_scan_results(wpa_s);
793 }
794
795 wpas_notify_scan_done(wpa_s, 1);
796
797 if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s)))
798 return;
799
800 if (wpa_s->disconnected) {
801 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
802 return;
803 }
804
805 if (bgscan_notify_scan(wpa_s) == 1)
806 return;
807
808 wpa_supplicant_rsn_preauth_scan_results(wpa_s);
809
810 selected = wpa_supplicant_pick_network(wpa_s, &ssid);
811 if (selected) {
812 wpa_supplicant_connect(wpa_s, selected, ssid);
813 } else {
814 wpa_printf(MSG_DEBUG, "No suitable network found");
815 ssid = wpa_supplicant_pick_new_network(wpa_s);
816 if (ssid) {
817 wpa_printf(MSG_DEBUG, "Setup a new network");
818 wpa_supplicant_associate(wpa_s, NULL, ssid);
819 } else
820 wpa_supplicant_req_new_scan(wpa_s, 5);
821 }
822 }
823 #endif /* CONFIG_NO_SCAN_PROCESSING */
824
825
826 #ifdef CONFIG_IEEE80211R
827 static void wpa_assoc_set_ft_params(struct wpa_supplicant *wpa_s,
828 const u8 *ftie, const u8 *mdie)
829 {
830 const u8 *mobility_domain = NULL;
831 const u8 *r0kh_id = NULL;
832 size_t r0kh_id_len = 0;
833 const u8 *r1kh_id = NULL;
834 struct rsn_ftie *hdr;
835 const u8 *pos, *end;
836
837 if (mdie == NULL || ftie == NULL)
838 return;
839
840 if (mdie[1] >= MOBILITY_DOMAIN_ID_LEN) {
841 mobility_domain = mdie + 2;
842 #ifdef CONFIG_SME
843 wpa_s->sme.ft_used = 1;
844 os_memcpy(wpa_s->sme.mobility_domain, mobility_domain, 2);
845 #endif /* CONFIG_SME */
846 }
847 if (ftie[1] >= sizeof(struct rsn_ftie)) {
848 end = ftie + 2 + ftie[1];
849 hdr = (struct rsn_ftie *) (ftie + 2);
850 pos = (const u8 *) (hdr + 1);
851 while (pos + 1 < end) {
852 if (pos + 2 + pos[1] > end)
853 break;
854 if (pos[0] == FTIE_SUBELEM_R1KH_ID &&
855 pos[1] == FT_R1KH_ID_LEN)
856 r1kh_id = pos + 2;
857 else if (pos[0] == FTIE_SUBELEM_R0KH_ID &&
858 pos[1] >= 1 && pos[1] <= FT_R0KH_ID_MAX_LEN) {
859 r0kh_id = pos + 2;
860 r0kh_id_len = pos[1];
861 }
862 pos += 2 + pos[1];
863 }
864 }
865 wpa_sm_set_ft_params(wpa_s->wpa, mobility_domain, r0kh_id,
866 r0kh_id_len, r1kh_id);
867 }
868 #endif /* CONFIG_IEEE80211R */
869
870 static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
871 union wpa_event_data *data)
872 {
873 int l, len, found = 0, wpa_found, rsn_found;
874 const u8 *p;
875 #ifdef CONFIG_IEEE80211R
876 const u8 *mdie = NULL, *ftie = NULL;
877 #endif /* CONFIG_IEEE80211R */
878
879 wpa_printf(MSG_DEBUG, "Association info event");
880 if (data->assoc_info.req_ies)
881 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
882 data->assoc_info.req_ies_len);
883 if (data->assoc_info.resp_ies)
884 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
885 data->assoc_info.resp_ies_len);
886 if (data->assoc_info.beacon_ies)
887 wpa_hexdump(MSG_DEBUG, "beacon_ies",
888 data->assoc_info.beacon_ies,
889 data->assoc_info.beacon_ies_len);
890
891 p = data->assoc_info.req_ies;
892 l = data->assoc_info.req_ies_len;
893
894 /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
895 while (p && l >= 2) {
896 len = p[1] + 2;
897 if (len > l) {
898 wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
899 p, l);
900 break;
901 }
902 if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
903 (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
904 (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
905 if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
906 break;
907 found = 1;
908 wpa_find_assoc_pmkid(wpa_s);
909 break;
910 }
911 l -= len;
912 p += len;
913 }
914 if (!found && data->assoc_info.req_ies)
915 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
916
917 #ifdef CONFIG_IEEE80211R
918 p = data->assoc_info.resp_ies;
919 l = data->assoc_info.resp_ies_len;
920
921 /* Go through the IEs and make a copy of the FT/MD IE, if present. */
922 while (p && l >= 2) {
923 len = p[1] + 2;
924 if (len > l) {
925 wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
926 p, l);
927 break;
928 }
929 if (p[0] == WLAN_EID_FAST_BSS_TRANSITION)
930 ftie = p;
931 else if (p[0] == WLAN_EID_MOBILITY_DOMAIN)
932 mdie = p;
933 l -= len;
934 p += len;
935 }
936
937 wpa_assoc_set_ft_params(wpa_s, ftie, mdie);
938 #endif /* CONFIG_IEEE80211R */
939
940 /* WPA/RSN IE from Beacon/ProbeResp */
941 p = data->assoc_info.beacon_ies;
942 l = data->assoc_info.beacon_ies_len;
943
944 /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
945 */
946 wpa_found = rsn_found = 0;
947 while (p && l >= 2) {
948 len = p[1] + 2;
949 if (len > l) {
950 wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
951 p, l);
952 break;
953 }
954 if (!wpa_found &&
955 p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
956 os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
957 wpa_found = 1;
958 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
959 }
960
961 if (!rsn_found &&
962 p[0] == WLAN_EID_RSN && p[1] >= 2) {
963 rsn_found = 1;
964 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
965 }
966
967 l -= len;
968 p += len;
969 }
970
971 if (!wpa_found && data->assoc_info.beacon_ies)
972 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
973 if (!rsn_found && data->assoc_info.beacon_ies)
974 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
975 if (wpa_found || rsn_found)
976 wpa_s->ap_ies_from_associnfo = 1;
977 }
978
979
980 static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
981 union wpa_event_data *data)
982 {
983 u8 bssid[ETH_ALEN];
984 int ft_completed = wpa_ft_is_completed(wpa_s->wpa);
985 int bssid_changed;
986 struct wpa_driver_capa capa;
987
988 if (data)
989 wpa_supplicant_event_associnfo(wpa_s, data);
990
991 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
992 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
993 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
994 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) ||
995 (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
996 os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
997 wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
998 MACSTR, MAC2STR(bssid));
999 bssid_changed = os_memcmp(wpa_s->bssid, bssid, ETH_ALEN);
1000 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
1001 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1002 if (bssid_changed)
1003 wpas_notify_bssid_changed(wpa_s);
1004
1005 if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
1006 wpa_clear_keys(wpa_s, bssid);
1007 }
1008 if (wpa_supplicant_select_config(wpa_s) < 0) {
1009 wpa_supplicant_disassociate(
1010 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1011 return;
1012 }
1013 }
1014
1015 #ifdef CONFIG_SME
1016 os_memcpy(wpa_s->sme.prev_bssid, bssid, ETH_ALEN);
1017 wpa_s->sme.prev_bssid_set = 1;
1018 #endif /* CONFIG_SME */
1019
1020 wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
1021 if (wpa_s->current_ssid) {
1022 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
1023 * initialized before association, but for other modes,
1024 * initialize PC/SC here, if the current configuration needs
1025 * smartcard or SIM/USIM. */
1026 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
1027 }
1028 wpa_sm_notify_assoc(wpa_s->wpa, bssid);
1029 l2_packet_notify_auth_start(wpa_s->l2);
1030
1031 /*
1032 * Set portEnabled first to FALSE in order to get EAP state machine out
1033 * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
1034 * state machine may transit to AUTHENTICATING state based on obsolete
1035 * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
1036 * AUTHENTICATED without ever giving chance to EAP state machine to
1037 * reset the state.
1038 */
1039 if (!ft_completed) {
1040 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
1041 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
1042 }
1043 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
1044 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
1045 /* 802.1X::portControl = Auto */
1046 eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
1047 wpa_s->eapol_received = 0;
1048 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1049 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE ||
1050 (wpa_s->current_ssid &&
1051 wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS)) {
1052 wpa_supplicant_cancel_auth_timeout(wpa_s);
1053 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1054 } else if (!ft_completed) {
1055 /* Timeout for receiving the first EAPOL packet */
1056 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
1057 }
1058 wpa_supplicant_cancel_scan(wpa_s);
1059
1060 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1061 wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1062 /*
1063 * We are done; the driver will take care of RSN 4-way
1064 * handshake.
1065 */
1066 wpa_supplicant_cancel_auth_timeout(wpa_s);
1067 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1068 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1069 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
1070 }
1071
1072 if (wpa_s->pending_eapol_rx) {
1073 struct os_time now, age;
1074 os_get_time(&now);
1075 os_time_sub(&now, &wpa_s->pending_eapol_rx_time, &age);
1076 if (age.sec == 0 && age.usec < 100000 &&
1077 os_memcmp(wpa_s->pending_eapol_rx_src, bssid, ETH_ALEN) ==
1078 0) {
1079 wpa_printf(MSG_DEBUG, "Process pending EAPOL frame "
1080 "that was received just before association "
1081 "notification");
1082 wpa_supplicant_rx_eapol(
1083 wpa_s, wpa_s->pending_eapol_rx_src,
1084 wpabuf_head(wpa_s->pending_eapol_rx),
1085 wpabuf_len(wpa_s->pending_eapol_rx));
1086 }
1087 wpabuf_free(wpa_s->pending_eapol_rx);
1088 wpa_s->pending_eapol_rx = NULL;
1089 }
1090
1091 #ifdef CONFIG_BGSCAN
1092 if (wpa_s->current_ssid != wpa_s->bgscan_ssid) {
1093 bgscan_deinit(wpa_s);
1094 if (wpa_s->current_ssid && wpa_s->current_ssid->bgscan) {
1095 if (bgscan_init(wpa_s, wpa_s->current_ssid)) {
1096 wpa_printf(MSG_DEBUG, "Failed to initialize "
1097 "bgscan");
1098 /*
1099 * Live without bgscan; it is only used as a
1100 * roaming optimization, so the initial
1101 * connection is not affected.
1102 */
1103 } else
1104 wpa_s->bgscan_ssid = wpa_s->current_ssid;
1105 } else
1106 wpa_s->bgscan_ssid = NULL;
1107 }
1108 #endif /* CONFIG_BGSCAN */
1109
1110 if ((wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1111 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
1112 wpa_s->current_ssid && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1113 capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE) {
1114 /* Set static WEP keys again */
1115 wpa_set_wep_keys(wpa_s, wpa_s->current_ssid);
1116 }
1117 }
1118
1119
1120 static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
1121 {
1122 const u8 *bssid;
1123 #ifdef CONFIG_SME
1124 int authenticating;
1125 u8 prev_pending_bssid[ETH_ALEN];
1126
1127 authenticating = wpa_s->wpa_state == WPA_AUTHENTICATING;
1128 os_memcpy(prev_pending_bssid, wpa_s->pending_bssid, ETH_ALEN);
1129 #endif /* CONFIG_SME */
1130
1131 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1132 /*
1133 * At least Host AP driver and a Prism3 card seemed to be
1134 * generating streams of disconnected events when configuring
1135 * IBSS for WPA-None. Ignore them for now.
1136 */
1137 wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
1138 "IBSS/WPA-None mode");
1139 return;
1140 }
1141
1142 if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
1143 wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1144 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
1145 "pre-shared key may be incorrect");
1146 }
1147 if (wpa_s->wpa_state >= WPA_ASSOCIATED)
1148 wpa_supplicant_req_scan(wpa_s, 0, 100000);
1149 bssid = wpa_s->bssid;
1150 if (is_zero_ether_addr(bssid))
1151 bssid = wpa_s->pending_bssid;
1152 wpa_blacklist_add(wpa_s, bssid);
1153 wpa_sm_notify_disassoc(wpa_s->wpa);
1154 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
1155 "remove keys");
1156 if (wpa_supplicant_dynamic_keys(wpa_s)) {
1157 wpa_s->keys_cleared = 0;
1158 wpa_clear_keys(wpa_s, wpa_s->bssid);
1159 }
1160 wpa_supplicant_mark_disassoc(wpa_s);
1161 bgscan_deinit(wpa_s);
1162 #ifdef CONFIG_SME
1163 if (authenticating &&
1164 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)) {
1165 /*
1166 * mac80211-workaround to force deauth on failed auth cmd,
1167 * requires us to remain in authenticating state to allow the
1168 * second authentication attempt to be continued properly.
1169 */
1170 wpa_printf(MSG_DEBUG, "SME: Allow pending authentication to "
1171 "proceed after disconnection event");
1172 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1173 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1174 }
1175 #endif /* CONFIG_SME */
1176 }
1177
1178
1179 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1180 static void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx,
1181 void *sock_ctx)
1182 {
1183 struct wpa_supplicant *wpa_s = eloop_ctx;
1184
1185 if (!wpa_s->pending_mic_error_report)
1186 return;
1187
1188 wpa_printf(MSG_DEBUG, "WPA: Sending pending MIC error report");
1189 wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
1190 wpa_s->pending_mic_error_report = 0;
1191 }
1192 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1193
1194
1195 static void
1196 wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
1197 union wpa_event_data *data)
1198 {
1199 int pairwise;
1200 struct os_time t;
1201
1202 wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
1203 pairwise = (data && data->michael_mic_failure.unicast);
1204 os_get_time(&t);
1205 if ((wpa_s->last_michael_mic_error &&
1206 t.sec - wpa_s->last_michael_mic_error <= 60) ||
1207 wpa_s->pending_mic_error_report) {
1208 if (wpa_s->pending_mic_error_report) {
1209 /*
1210 * Send the pending MIC error report immediately since
1211 * we are going to start countermeasures and AP better
1212 * do the same.
1213 */
1214 wpa_sm_key_request(wpa_s->wpa, 1,
1215 wpa_s->pending_mic_error_pairwise);
1216 }
1217
1218 /* Send the new MIC error report immediately since we are going
1219 * to start countermeasures and AP better do the same.
1220 */
1221 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1222
1223 /* initialize countermeasures */
1224 wpa_s->countermeasures = 1;
1225 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
1226
1227 /*
1228 * Need to wait for completion of request frame. We do not get
1229 * any callback for the message completion, so just wait a
1230 * short while and hope for the best. */
1231 os_sleep(0, 10000);
1232
1233 wpa_drv_set_countermeasures(wpa_s, 1);
1234 wpa_supplicant_deauthenticate(wpa_s,
1235 WLAN_REASON_MICHAEL_MIC_FAILURE);
1236 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
1237 wpa_s, NULL);
1238 eloop_register_timeout(60, 0,
1239 wpa_supplicant_stop_countermeasures,
1240 wpa_s, NULL);
1241 /* TODO: mark the AP rejected for 60 second. STA is
1242 * allowed to associate with another AP.. */
1243 } else {
1244 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1245 if (wpa_s->mic_errors_seen) {
1246 /*
1247 * Reduce the effectiveness of Michael MIC error
1248 * reports as a means for attacking against TKIP if
1249 * more than one MIC failure is noticed with the same
1250 * PTK. We delay the transmission of the reports by a
1251 * random time between 0 and 60 seconds in order to
1252 * force the attacker wait 60 seconds before getting
1253 * the information on whether a frame resulted in a MIC
1254 * failure.
1255 */
1256 u8 rval[4];
1257 int sec;
1258
1259 if (os_get_random(rval, sizeof(rval)) < 0)
1260 sec = os_random() % 60;
1261 else
1262 sec = WPA_GET_BE32(rval) % 60;
1263 wpa_printf(MSG_DEBUG, "WPA: Delay MIC error report %d "
1264 "seconds", sec);
1265 wpa_s->pending_mic_error_report = 1;
1266 wpa_s->pending_mic_error_pairwise = pairwise;
1267 eloop_cancel_timeout(
1268 wpa_supplicant_delayed_mic_error_report,
1269 wpa_s, NULL);
1270 eloop_register_timeout(
1271 sec, os_random() % 1000000,
1272 wpa_supplicant_delayed_mic_error_report,
1273 wpa_s, NULL);
1274 } else {
1275 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1276 }
1277 #else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1278 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1279 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1280 }
1281 wpa_s->last_michael_mic_error = t.sec;
1282 wpa_s->mic_errors_seen++;
1283 }
1284
1285
1286 #ifdef CONFIG_TERMINATE_ONLASTIF
1287 static int any_interfaces(struct wpa_supplicant *head)
1288 {
1289 struct wpa_supplicant *wpa_s;
1290
1291 for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
1292 if (!wpa_s->interface_removed)
1293 return 1;
1294 return 0;
1295 }
1296 #endif /* CONFIG_TERMINATE_ONLASTIF */
1297
1298
1299 static void
1300 wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
1301 union wpa_event_data *data)
1302 {
1303 if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
1304 return;
1305
1306 switch (data->interface_status.ievent) {
1307 case EVENT_INTERFACE_ADDED:
1308 if (!wpa_s->interface_removed)
1309 break;
1310 wpa_s->interface_removed = 0;
1311 wpa_printf(MSG_DEBUG, "Configured interface was added.");
1312 if (wpa_supplicant_driver_init(wpa_s) < 0) {
1313 wpa_printf(MSG_INFO, "Failed to initialize the driver "
1314 "after interface was added.");
1315 }
1316 break;
1317 case EVENT_INTERFACE_REMOVED:
1318 wpa_printf(MSG_DEBUG, "Configured interface was removed.");
1319 wpa_s->interface_removed = 1;
1320 wpa_supplicant_mark_disassoc(wpa_s);
1321 l2_packet_deinit(wpa_s->l2);
1322 wpa_s->l2 = NULL;
1323 #ifdef CONFIG_TERMINATE_ONLASTIF
1324 /* check if last interface */
1325 if (!any_interfaces(wpa_s->global->ifaces))
1326 eloop_terminate();
1327 #endif /* CONFIG_TERMINATE_ONLASTIF */
1328 break;
1329 }
1330 }
1331
1332
1333 #ifdef CONFIG_PEERKEY
1334 static void
1335 wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
1336 union wpa_event_data *data)
1337 {
1338 if (data == NULL)
1339 return;
1340 wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
1341 }
1342 #endif /* CONFIG_PEERKEY */
1343
1344
1345 #ifdef CONFIG_IEEE80211R
1346 static void
1347 wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
1348 union wpa_event_data *data)
1349 {
1350 if (data == NULL)
1351 return;
1352
1353 if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
1354 data->ft_ies.ies_len,
1355 data->ft_ies.ft_action,
1356 data->ft_ies.target_ap,
1357 data->ft_ies.ric_ies,
1358 data->ft_ies.ric_ies_len) < 0) {
1359 /* TODO: prevent MLME/driver from trying to associate? */
1360 }
1361 }
1362 #endif /* CONFIG_IEEE80211R */
1363
1364
1365 #ifdef CONFIG_IBSS_RSN
1366 static void wpa_supplicant_event_ibss_rsn_start(struct wpa_supplicant *wpa_s,
1367 union wpa_event_data *data)
1368 {
1369 if (data == NULL)
1370 return;
1371 ibss_rsn_start(wpa_s->ibss_rsn, data->ibss_rsn_start.peer);
1372 }
1373 #endif /* CONFIG_IBSS_RSN */
1374
1375
1376 void wpa_supplicant_event(void *ctx, wpa_event_type event,
1377 union wpa_event_data *data)
1378 {
1379 struct wpa_supplicant *wpa_s = ctx;
1380
1381 switch (event) {
1382 case EVENT_AUTH:
1383 sme_event_auth(wpa_s, data);
1384 break;
1385 case EVENT_ASSOC:
1386 wpa_supplicant_event_assoc(wpa_s, data);
1387 break;
1388 case EVENT_DISASSOC:
1389 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
1390 sme_event_disassoc(wpa_s, data);
1391 /* fall through */
1392 case EVENT_DEAUTH:
1393 wpa_supplicant_event_disassoc(wpa_s);
1394 break;
1395 case EVENT_MICHAEL_MIC_FAILURE:
1396 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
1397 break;
1398 #ifndef CONFIG_NO_SCAN_PROCESSING
1399 case EVENT_SCAN_RESULTS:
1400 wpa_supplicant_event_scan_results(wpa_s);
1401 break;
1402 #endif /* CONFIG_NO_SCAN_PROCESSING */
1403 case EVENT_ASSOCINFO:
1404 wpa_supplicant_event_associnfo(wpa_s, data);
1405 break;
1406 case EVENT_INTERFACE_STATUS:
1407 wpa_supplicant_event_interface_status(wpa_s, data);
1408 break;
1409 case EVENT_PMKID_CANDIDATE:
1410 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
1411 break;
1412 #ifdef CONFIG_PEERKEY
1413 case EVENT_STKSTART:
1414 wpa_supplicant_event_stkstart(wpa_s, data);
1415 break;
1416 #endif /* CONFIG_PEERKEY */
1417 #ifdef CONFIG_IEEE80211R
1418 case EVENT_FT_RESPONSE:
1419 wpa_supplicant_event_ft_response(wpa_s, data);
1420 break;
1421 #endif /* CONFIG_IEEE80211R */
1422 #ifdef CONFIG_IBSS_RSN
1423 case EVENT_IBSS_RSN_START:
1424 wpa_supplicant_event_ibss_rsn_start(wpa_s, data);
1425 break;
1426 #endif /* CONFIG_IBSS_RSN */
1427 case EVENT_ASSOC_REJECT:
1428 sme_event_assoc_reject(wpa_s, data);
1429 break;
1430 case EVENT_AUTH_TIMED_OUT:
1431 sme_event_auth_timed_out(wpa_s, data);
1432 break;
1433 case EVENT_ASSOC_TIMED_OUT:
1434 sme_event_assoc_timed_out(wpa_s, data);
1435 break;
1436 default:
1437 wpa_printf(MSG_INFO, "Unknown event %d", event);
1438 break;
1439 }
1440 }
Unnamed repository; edit this file 'description' to name the repository.