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nl80211: Add debug prints for BSS status in scan results
[thirdparty/hostap.git] / wpa_supplicant / events.c
CommitLineData
6fc6879b
JM		 1/*
2 * WPA Supplicant - Driver event processing
6ae93185 3 * Copyright (c) 2003-2009, Jouni Malinen <j@w1.fi>
6fc6879b
JM		 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"
3acb5005 19#include "rsn_supp/wpa.h"
6fc6879b 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 25#include "pcsc_funcs.h"
3acb5005
JM		 26#include "rsn_supp/preauth.h"
27#include "rsn_supp/pmksa_cache.h"
90973fb2 28#include "common/wpa_ctrl.h"
6fc6879b 29#include "eap_peer/eap.h"
8bac466b 30#include "notify.h"
90973fb2 31#include "common/ieee802_11_defs.h"
6fc6879b
JM		 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
e81634cd
JM		 430 if (ssid_len == 0) {
431 wpa_printf(MSG_DEBUG, " skip - SSID not known");
432 continue;
433 }
434
6fc6879b
JM		 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) {
ad08c363
JM		 441 int check_ssid = 1;
442
6fc6879b
JM		 443 if (ssid->disabled) {
444 wpa_printf(MSG_DEBUG, " skip - disabled");
445 continue;
446 }
9cf32261 447
ad08c363
JM		 448#ifdef CONFIG_WPS
449 if (ssid->ssid_len == 0 &&
a6099152 450 wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
ad08c363
JM		 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)) {
6fc6879b
JM		 457 wpa_printf(MSG_DEBUG, " skip - "
458 "SSID mismatch");
459 continue;
460 }
9cf32261 461
6fc6879b
JM		 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 }
9cf32261 469
a6099152 470 if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
9cf32261
JM		 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;
6fc6879b
JM		 479 }
480 }
481
9cf32261
JM		 482 return NULL;
483}
484
485
486static struct wpa_scan_res *
487wpa_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
6fc6879b 497 wpa_printf(MSG_DEBUG, "Try to find non-WPA AP");
9cf32261 498 for (i = 0; i < wpa_s->scan_res->num; i++) {
6fc6879b
JM		 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);
9cf32261 518
6fc6879b
JM		 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 }
9cf32261 524
e81634cd
JM		 525 if (ssid_len == 0) {
526 wpa_printf(MSG_DEBUG, " skip - SSID not known");
527 continue;
528 }
529
6fc6879b 530 for (ssid = group; ssid; ssid = ssid->pnext) {
ad08c363
JM		 531 int check_ssid = ssid->ssid_len != 0;
532
6fc6879b
JM		 533 if (ssid->disabled) {
534 wpa_printf(MSG_DEBUG, " skip - disabled");
535 continue;
536 }
9cf32261 537
ad08c363
JM		 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 &&
a6099152
JM		 545 wpas_wps_ssid_wildcard_ok(wpa_s, ssid,
546 bss))
ad08c363
JM		 547 check_ssid = 0;
548 }
549#endif /* CONFIG_WPS */
550
551 if (check_ssid &&
6fc6879b
JM		 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 }
1bd3f426 566
6fc6879b 567 if (!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
ad08c363 568 !(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
6fc6879b
JM		 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
1bd3f426 576 if ((ssid->key_mgmt &
56586197
JM		 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)) &&
6fc6879b
JM		 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
6fc6879b
JM		 599 wpa_printf(MSG_DEBUG, " selected non-WPA AP "
600 MACSTR " ssid='%s'",
601 MAC2STR(bss->bssid),
602 wpa_ssid_txt(ssid_, ssid_len));
9cf32261
JM		 603 *selected_ssid = ssid;
604 return bss;
6fc6879b
JM		 605 }
606 }
607
9cf32261
JM		 608 return NULL;
609}
610
611
612static struct wpa_scan_res *
613wpa_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);
6fc6879b
JM		 629}
630
631
09b9df4e
JM		 632static struct wpa_scan_res *
633wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,
634 struct wpa_ssid **selected_ssid)
6fc6879b 635{
6fc6879b 636 struct wpa_scan_res *selected = NULL;
09b9df4e
JM		 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
661static 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;
4f34d51a
SL		 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;
09b9df4e
JM		 679 }
680 wpa_supplicant_req_scan(wpa_s, timeout, 0);
681}
682
683
684static 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 }
09b9df4e
JM		 714}
715
716
b55aaa5f
JM		 717static struct wpa_ssid *
718wpa_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
6ae93185
JM		 737static 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
09b9df4e
JM		 765static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
766{
767 struct wpa_scan_res *selected;
6fc6879b
JM		 768 struct wpa_ssid *ssid = NULL;
769
cb8564b1
DW		 770 wpa_supplicant_notify_scanning(wpa_s, 0);
771
6fc6879b
JM		 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");
09b9df4e
JM		 777 wpa_supplicant_req_new_scan(wpa_s, 1);
778 return;
6fc6879b
JM		 779 }
780
23e07237
DN		 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 {
69856fad
JM		 790 wpa_printf(MSG_DEBUG, "New scan results available");
791 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
8bac466b 792 wpas_notify_scan_results(wpa_s);
23e07237 793 }
6fc6879b 794
8bac466b
JM		 795 wpas_notify_scan_done(wpa_s, 1);
796
3180d7a2 797 if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s)))
6fc6879b
JM		 798 return;
799
3180d7a2
SO		 800 if (wpa_s->disconnected) {
801 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
802 return;
803 }
804
60b94c98
JM		 805 if (bgscan_notify_scan(wpa_s) == 1)
806 return;
807
6ae93185
JM		 808 wpa_supplicant_rsn_preauth_scan_results(wpa_s);
809
09b9df4e 810 selected = wpa_supplicant_pick_network(wpa_s, &ssid);
6fc6879b 811 if (selected) {
09b9df4e 812 wpa_supplicant_connect(wpa_s, selected, ssid);
6fc6879b 813 } else {
09b9df4e 814 wpa_printf(MSG_DEBUG, "No suitable network found");
b55aaa5f
JM		 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);
6fc6879b 821 }
6fc6879b
JM		 822}
823#endif /* CONFIG_NO_SCAN_PROCESSING */
824
825
c2a04078
JM		 826#ifdef CONFIG_IEEE80211R
827static 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
6fc6879b
JM		 870static 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;
c2a04078
JM		 874 const u8 *p;
875#ifdef CONFIG_IEEE80211R
876 const u8 *mdie = NULL, *ftie = NULL;
877#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 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
c2a04078
JM		 917#ifdef CONFIG_IEEE80211R
918 p = data->assoc_info.resp_ies;
919 l = data->assoc_info.resp_ies_len;
920
94873e3b 921 /* Go through the IEs and make a copy of the FT/MD IE, if present. */
c2a04078
JM		 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
6fc6879b
JM		 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
980static 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);
8bac466b 985 int bssid_changed;
0194fedb 986 struct wpa_driver_capa capa;
6fc6879b
JM		 987
988 if (data)
989 wpa_supplicant_event_associnfo(wpa_s, data);
990
991 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
c2a04078 992 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
6fc6879b 993 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
c2a04078 994 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) ||
6fc6879b
JM		 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));
8bac466b 999 bssid_changed = os_memcmp(wpa_s->bssid, bssid, ETH_ALEN);
6fc6879b
JM		 1000 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
1001 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
8bac466b
JM		 1002 if (bssid_changed)
1003 wpas_notify_bssid_changed(wpa_s);
1004
6fc6879b
JM		 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
62fa124c
JM		 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
6fc6879b
JM		 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 }
56586197 1043 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
6fc6879b
JM		 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_supplicant_cancel_auth_timeout(wpa_s);
1051 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1052 } else if (!ft_completed) {
1053 /* Timeout for receiving the first EAPOL packet */
1054 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
1055 }
1056 wpa_supplicant_cancel_scan(wpa_s);
1057
c2a04078 1058 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
56586197 1059 wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
6fc6879b
JM		 1060 /*
1061 * We are done; the driver will take care of RSN 4-way
1062 * handshake.
1063 */
1064 wpa_supplicant_cancel_auth_timeout(wpa_s);
1065 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1066 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1067 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
1068 }
1ff73338
JM		 1069
1070 if (wpa_s->pending_eapol_rx) {
1071 struct os_time now, age;
1072 os_get_time(&now);
1073 os_time_sub(&now, &wpa_s->pending_eapol_rx_time, &age);
1074 if (age.sec == 0 && age.usec < 100000 &&
1075 os_memcmp(wpa_s->pending_eapol_rx_src, bssid, ETH_ALEN) ==
1076 0) {
1077 wpa_printf(MSG_DEBUG, "Process pending EAPOL frame "
1078 "that was received just before association "
1079 "notification");
1080 wpa_supplicant_rx_eapol(
1081 wpa_s, wpa_s->pending_eapol_rx_src,
1082 wpabuf_head(wpa_s->pending_eapol_rx),
1083 wpabuf_len(wpa_s->pending_eapol_rx));
1084 }
1085 wpabuf_free(wpa_s->pending_eapol_rx);
1086 wpa_s->pending_eapol_rx = NULL;
1087 }
60b94c98
JM		 1088
1089#ifdef CONFIG_BGSCAN
1090 if (wpa_s->current_ssid != wpa_s->bgscan_ssid) {
1091 bgscan_deinit(wpa_s);
1092 if (wpa_s->current_ssid && wpa_s->current_ssid->bgscan) {
1093 if (bgscan_init(wpa_s, wpa_s->current_ssid)) {
1094 wpa_printf(MSG_DEBUG, "Failed to initialize "
1095 "bgscan");
1096 /*
1097 * Live without bgscan; it is only used as a
1098 * roaming optimization, so the initial
1099 * connection is not affected.
1100 */
1101 } else
1102 wpa_s->bgscan_ssid = wpa_s->current_ssid;
1103 } else
1104 wpa_s->bgscan_ssid = NULL;
1105 }
1106#endif /* CONFIG_BGSCAN */
0194fedb
JB		 1107
1108 if ((wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1109 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
1110 wpa_s->current_ssid && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1111 capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE) {
1112 /* Set static WEP keys again */
1113 wpa_set_wep_keys(wpa_s, wpa_s->current_ssid);
1114 }
6fc6879b
JM		 1115}
1116
1117
1118static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
1119{
1120 const u8 *bssid;
6d6f4bb8
JM		 1121#ifdef CONFIG_SME
1122 int authenticating;
1123 u8 prev_pending_bssid[ETH_ALEN];
1124
1125 authenticating = wpa_s->wpa_state == WPA_AUTHENTICATING;
1126 os_memcpy(prev_pending_bssid, wpa_s->pending_bssid, ETH_ALEN);
1127#endif /* CONFIG_SME */
6fc6879b
JM		 1128
1129 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1130 /*
1131 * At least Host AP driver and a Prism3 card seemed to be
1132 * generating streams of disconnected events when configuring
1133 * IBSS for WPA-None. Ignore them for now.
1134 */
1135 wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
1136 "IBSS/WPA-None mode");
1137 return;
1138 }
1139
1140 if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
56586197 1141 wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
6fc6879b
JM		 1142 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
1143 "pre-shared key may be incorrect");
1144 }
1145 if (wpa_s->wpa_state >= WPA_ASSOCIATED)
1146 wpa_supplicant_req_scan(wpa_s, 0, 100000);
1147 bssid = wpa_s->bssid;
a8e16edc 1148 if (is_zero_ether_addr(bssid))
6fc6879b
JM		 1149 bssid = wpa_s->pending_bssid;
1150 wpa_blacklist_add(wpa_s, bssid);
1151 wpa_sm_notify_disassoc(wpa_s->wpa);
1152 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
1153 "remove keys");
1154 if (wpa_supplicant_dynamic_keys(wpa_s)) {
1155 wpa_s->keys_cleared = 0;
1156 wpa_clear_keys(wpa_s, wpa_s->bssid);
1157 }
1158 wpa_supplicant_mark_disassoc(wpa_s);
60b94c98 1159 bgscan_deinit(wpa_s);
6d6f4bb8
JM		 1160#ifdef CONFIG_SME
1161 if (authenticating &&
1162 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)) {
1163 /*
1164 * mac80211-workaround to force deauth on failed auth cmd,
1165 * requires us to remain in authenticating state to allow the
1166 * second authentication attempt to be continued properly.
1167 */
1168 wpa_printf(MSG_DEBUG, "SME: Allow pending authentication to "
1169 "proceed after disconnection event");
1170 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1171 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1172 }
1173#endif /* CONFIG_SME */
6fc6879b
JM		 1174}
1175
1176
46690a3b
JM		 1177#ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1178static void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx,
1179 void *sock_ctx)
1180{
1181 struct wpa_supplicant *wpa_s = eloop_ctx;
1182
1183 if (!wpa_s->pending_mic_error_report)
1184 return;
1185
1186 wpa_printf(MSG_DEBUG, "WPA: Sending pending MIC error report");
1187 wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
1188 wpa_s->pending_mic_error_report = 0;
1189}
1190#endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1191
1192
6fc6879b
JM		 1193static void
1194wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
1195 union wpa_event_data *data)
1196{
1197 int pairwise;
1198 struct os_time t;
1199
1200 wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
1201 pairwise = (data && data->michael_mic_failure.unicast);
6fc6879b 1202 os_get_time(&t);
46690a3b
JM		 1203 if ((wpa_s->last_michael_mic_error &&
1204 t.sec - wpa_s->last_michael_mic_error <= 60) ||
1205 wpa_s->pending_mic_error_report) {
1206 if (wpa_s->pending_mic_error_report) {
1207 /*
1208 * Send the pending MIC error report immediately since
1209 * we are going to start countermeasures and AP better
1210 * do the same.
1211 */
1212 wpa_sm_key_request(wpa_s->wpa, 1,
1213 wpa_s->pending_mic_error_pairwise);
1214 }
1215
1216 /* Send the new MIC error report immediately since we are going
1217 * to start countermeasures and AP better do the same.
1218 */
1219 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1220
6fc6879b
JM		 1221 /* initialize countermeasures */
1222 wpa_s->countermeasures = 1;
1223 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
1224
1225 /*
1226 * Need to wait for completion of request frame. We do not get
1227 * any callback for the message completion, so just wait a
1228 * short while and hope for the best. */
1229 os_sleep(0, 10000);
1230
1231 wpa_drv_set_countermeasures(wpa_s, 1);
1232 wpa_supplicant_deauthenticate(wpa_s,
1233 WLAN_REASON_MICHAEL_MIC_FAILURE);
1234 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
1235 wpa_s, NULL);
1236 eloop_register_timeout(60, 0,
1237 wpa_supplicant_stop_countermeasures,
1238 wpa_s, NULL);
1239 /* TODO: mark the AP rejected for 60 second. STA is
1240 * allowed to associate with another AP.. */
46690a3b
JM		 1241 } else {
1242#ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1243 if (wpa_s->mic_errors_seen) {
1244 /*
1245 * Reduce the effectiveness of Michael MIC error
1246 * reports as a means for attacking against TKIP if
1247 * more than one MIC failure is noticed with the same
1248 * PTK. We delay the transmission of the reports by a
1249 * random time between 0 and 60 seconds in order to
1250 * force the attacker wait 60 seconds before getting
1251 * the information on whether a frame resulted in a MIC
1252 * failure.
1253 */
1254 u8 rval[4];
1255 int sec;
1256
1257 if (os_get_random(rval, sizeof(rval)) < 0)
1258 sec = os_random() % 60;
1259 else
1260 sec = WPA_GET_BE32(rval) % 60;
1261 wpa_printf(MSG_DEBUG, "WPA: Delay MIC error report %d "
1262 "seconds", sec);
1263 wpa_s->pending_mic_error_report = 1;
1264 wpa_s->pending_mic_error_pairwise = pairwise;
1265 eloop_cancel_timeout(
1266 wpa_supplicant_delayed_mic_error_report,
1267 wpa_s, NULL);
1268 eloop_register_timeout(
1269 sec, os_random() % 1000000,
1270 wpa_supplicant_delayed_mic_error_report,
1271 wpa_s, NULL);
1272 } else {
1273 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1274 }
1275#else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1276 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1277#endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
6fc6879b
JM		 1278 }
1279 wpa_s->last_michael_mic_error = t.sec;
46690a3b 1280 wpa_s->mic_errors_seen++;
6fc6879b
JM		 1281}
1282
1283
a83d9c96
SL		 1284#ifdef CONFIG_TERMINATE_ONLASTIF
1285static int any_interfaces(struct wpa_supplicant *head)
1286{
1287 struct wpa_supplicant *wpa_s;
1288
1289 for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
1290 if (!wpa_s->interface_removed)
1291 return 1;
1292 return 0;
1293}
1294#endif /* CONFIG_TERMINATE_ONLASTIF */
1295
1296
6fc6879b
JM		 1297static void
1298wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
1299 union wpa_event_data *data)
1300{
1301 if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
1302 return;
1303
1304 switch (data->interface_status.ievent) {
1305 case EVENT_INTERFACE_ADDED:
1306 if (!wpa_s->interface_removed)
1307 break;
1308 wpa_s->interface_removed = 0;
1309 wpa_printf(MSG_DEBUG, "Configured interface was added.");
1310 if (wpa_supplicant_driver_init(wpa_s) < 0) {
1311 wpa_printf(MSG_INFO, "Failed to initialize the driver "
1312 "after interface was added.");
1313 }
1314 break;
1315 case EVENT_INTERFACE_REMOVED:
1316 wpa_printf(MSG_DEBUG, "Configured interface was removed.");
1317 wpa_s->interface_removed = 1;
1318 wpa_supplicant_mark_disassoc(wpa_s);
1319 l2_packet_deinit(wpa_s->l2);
1320 wpa_s->l2 = NULL;
a83d9c96
SL		 1321#ifdef CONFIG_TERMINATE_ONLASTIF
1322 /* check if last interface */
1323 if (!any_interfaces(wpa_s->global->ifaces))
1324 eloop_terminate();
1325#endif /* CONFIG_TERMINATE_ONLASTIF */
6fc6879b
JM		 1326 break;
1327 }
1328}
1329
1330
1331#ifdef CONFIG_PEERKEY
1332static void
1333wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
1334 union wpa_event_data *data)
1335{
1336 if (data == NULL)
1337 return;
1338 wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
1339}
1340#endif /* CONFIG_PEERKEY */
1341
1342
1343#ifdef CONFIG_IEEE80211R
1344static void
1345wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
1346 union wpa_event_data *data)
1347{
1348 if (data == NULL)
1349 return;
1350
1351 if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
1352 data->ft_ies.ies_len,
1353 data->ft_ies.ft_action,
babfbf15
JM		 1354 data->ft_ies.target_ap,
1355 data->ft_ies.ric_ies,
1356 data->ft_ies.ric_ies_len) < 0) {
6fc6879b
JM		 1357 /* TODO: prevent MLME/driver from trying to associate? */
1358 }
1359}
1360#endif /* CONFIG_IEEE80211R */
1361
1362
11ef8d35
JM		 1363#ifdef CONFIG_IBSS_RSN
1364static void wpa_supplicant_event_ibss_rsn_start(struct wpa_supplicant *wpa_s,
1365 union wpa_event_data *data)
1366{
1367 if (data == NULL)
1368 return;
1369 ibss_rsn_start(wpa_s->ibss_rsn, data->ibss_rsn_start.peer);
1370}
1371#endif /* CONFIG_IBSS_RSN */
1372
1373
6fc6879b
JM		 1374void wpa_supplicant_event(void *ctx, wpa_event_type event,
1375 union wpa_event_data *data)
1376{
1377 struct wpa_supplicant *wpa_s = ctx;
1378
1379 switch (event) {
c2a04078
JM		 1380 case EVENT_AUTH:
1381 sme_event_auth(wpa_s, data);
1382 break;
6fc6879b
JM		 1383 case EVENT_ASSOC:
1384 wpa_supplicant_event_assoc(wpa_s, data);
1385 break;
c2a04078 1386 case EVENT_DEAUTH:
6fc6879b
JM		 1387 case EVENT_DISASSOC:
1388 wpa_supplicant_event_disassoc(wpa_s);
1389 break;
1390 case EVENT_MICHAEL_MIC_FAILURE:
1391 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
1392 break;
1393#ifndef CONFIG_NO_SCAN_PROCESSING
1394 case EVENT_SCAN_RESULTS:
1395 wpa_supplicant_event_scan_results(wpa_s);
1396 break;
1397#endif /* CONFIG_NO_SCAN_PROCESSING */
1398 case EVENT_ASSOCINFO:
1399 wpa_supplicant_event_associnfo(wpa_s, data);
1400 break;
1401 case EVENT_INTERFACE_STATUS:
1402 wpa_supplicant_event_interface_status(wpa_s, data);
1403 break;
1404 case EVENT_PMKID_CANDIDATE:
1405 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
1406 break;
1407#ifdef CONFIG_PEERKEY
1408 case EVENT_STKSTART:
1409 wpa_supplicant_event_stkstart(wpa_s, data);
1410 break;
1411#endif /* CONFIG_PEERKEY */
1412#ifdef CONFIG_IEEE80211R
1413 case EVENT_FT_RESPONSE:
1414 wpa_supplicant_event_ft_response(wpa_s, data);
1415 break;
1416#endif /* CONFIG_IEEE80211R */
11ef8d35
JM		 1417#ifdef CONFIG_IBSS_RSN
1418 case EVENT_IBSS_RSN_START:
1419 wpa_supplicant_event_ibss_rsn_start(wpa_s, data);
1420 break;
1421#endif /* CONFIG_IBSS_RSN */
efa46078
JM		 1422 case EVENT_ASSOC_REJECT:
1423 sme_event_assoc_reject(wpa_s, data);
1424 break;
da1fb17c
JM		 1425 case EVENT_AUTH_TIMED_OUT:
1426 sme_event_auth_timed_out(wpa_s, data);
1427 break;
1428 case EVENT_ASSOC_TIMED_OUT:
1429 sme_event_assoc_timed_out(wpa_s, data);
1430 break;
6fc6879b
JM		 1431 default:
1432 wpa_printf(MSG_INFO, "Unknown event %d", event);
1433 break;
1434 }
1435}
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