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[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"
f8b1f695 38#include "ap.h"
6fc6879b
JM		 39
40
41static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
42{
8bac466b 43 struct wpa_ssid *ssid, *old_ssid;
6fc6879b
JM		 44
45 if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
46 return 0;
47
48 wpa_printf(MSG_DEBUG, "Select network based on association "
49 "information");
50 ssid = wpa_supplicant_get_ssid(wpa_s);
51 if (ssid == NULL) {
52 wpa_printf(MSG_INFO, "No network configuration found for the "
53 "current AP");
54 return -1;
55 }
56
57 if (ssid->disabled) {
58 wpa_printf(MSG_DEBUG, "Selected network is disabled");
59 return -1;
60 }
61
62 wpa_printf(MSG_DEBUG, "Network configuration found for the current "
63 "AP");
64 if (ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
65 WPA_KEY_MGMT_WPA_NONE |
56586197
JM		 66 WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_FT_IEEE8021X |
67 WPA_KEY_MGMT_PSK_SHA256 |
68 WPA_KEY_MGMT_IEEE8021X_SHA256)) {
6fc6879b
JM		 69 u8 wpa_ie[80];
70 size_t wpa_ie_len = sizeof(wpa_ie);
71 wpa_supplicant_set_suites(wpa_s, NULL, ssid,
72 wpa_ie, &wpa_ie_len);
73 } else {
74 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
75 }
76
77 if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
78 eapol_sm_invalidate_cached_session(wpa_s->eapol);
8bac466b 79 old_ssid = wpa_s->current_ssid;
6fc6879b
JM		 80 wpa_s->current_ssid = ssid;
81 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
82 wpa_supplicant_initiate_eapol(wpa_s);
8bac466b
JM		 83 if (old_ssid != wpa_s->current_ssid)
84 wpas_notify_network_changed(wpa_s);
6fc6879b
JM		 85
86 return 0;
87}
88
89
90static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
91 void *sock_ctx)
92{
93 struct wpa_supplicant *wpa_s = eloop_ctx;
94
95 if (wpa_s->countermeasures) {
96 wpa_s->countermeasures = 0;
97 wpa_drv_set_countermeasures(wpa_s, 0);
98 wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
99 wpa_supplicant_req_scan(wpa_s, 0, 0);
100 }
101}
102
103
104void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
105{
8bac466b
JM		 106 int bssid_changed;
107
6fc6879b 108 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
8bac466b 109 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
6fc6879b
JM		 110 os_memset(wpa_s->bssid, 0, ETH_ALEN);
111 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
8bac466b
JM		 112 if (bssid_changed)
113 wpas_notify_bssid_changed(wpa_s);
114
6fc6879b
JM		 115 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
116 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
56586197 117 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
6fc6879b
JM		 118 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
119 wpa_s->ap_ies_from_associnfo = 0;
120}
121
122
123static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
124{
125 struct wpa_ie_data ie;
126 int pmksa_set = -1;
127 size_t i;
128
129 if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
130 ie.pmkid == NULL)
131 return;
132
133 for (i = 0; i < ie.num_pmkid; i++) {
134 pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
135 ie.pmkid + i * PMKID_LEN,
136 NULL, NULL, 0);
137 if (pmksa_set == 0) {
138 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
139 break;
140 }
141 }
142
143 wpa_printf(MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from PMKSA "
144 "cache", pmksa_set == 0 ? "" : "not ");
145}
146
147
148static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
149 union wpa_event_data *data)
150{
151 if (data == NULL) {
152 wpa_printf(MSG_DEBUG, "RSN: No data in PMKID candidate event");
153 return;
154 }
155 wpa_printf(MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
156 " index=%d preauth=%d",
157 MAC2STR(data->pmkid_candidate.bssid),
158 data->pmkid_candidate.index,
159 data->pmkid_candidate.preauth);
160
161 pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
162 data->pmkid_candidate.index,
163 data->pmkid_candidate.preauth);
164}
165
166
167static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
168{
169 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
170 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
171 return 0;
172
173#ifdef IEEE8021X_EAPOL
174 if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
175 wpa_s->current_ssid &&
176 !(wpa_s->current_ssid->eapol_flags &
177 (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
178 EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
179 /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
180 * plaintext or static WEP keys). */
181 return 0;
182 }
183#endif /* IEEE8021X_EAPOL */
184
185 return 1;
186}
187
188
189/**
190 * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
191 * @wpa_s: pointer to wpa_supplicant data
192 * @ssid: Configuration data for the network
193 * Returns: 0 on success, -1 on failure
194 *
195 * This function is called when starting authentication with a network that is
196 * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
197 */
198int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
199 struct wpa_ssid *ssid)
200{
201#ifdef IEEE8021X_EAPOL
202 int aka = 0, sim = 0, type;
203
204 if (ssid->eap.pcsc == NULL || wpa_s->scard != NULL)
205 return 0;
206
207 if (ssid->eap.eap_methods == NULL) {
208 sim = 1;
209 aka = 1;
210 } else {
211 struct eap_method_type *eap = ssid->eap.eap_methods;
212 while (eap->vendor != EAP_VENDOR_IETF ||
213 eap->method != EAP_TYPE_NONE) {
214 if (eap->vendor == EAP_VENDOR_IETF) {
215 if (eap->method == EAP_TYPE_SIM)
216 sim = 1;
217 else if (eap->method == EAP_TYPE_AKA)
218 aka = 1;
219 }
220 eap++;
221 }
222 }
223
224 if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
225 sim = 0;
226 if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL)
227 aka = 0;
228
229 if (!sim && !aka) {
230 wpa_printf(MSG_DEBUG, "Selected network is configured to use "
231 "SIM, but neither EAP-SIM nor EAP-AKA are enabled");
232 return 0;
233 }
234
235 wpa_printf(MSG_DEBUG, "Selected network is configured to use SIM "
236 "(sim=%d aka=%d) - initialize PCSC", sim, aka);
237 if (sim && aka)
238 type = SCARD_TRY_BOTH;
239 else if (aka)
240 type = SCARD_USIM_ONLY;
241 else
242 type = SCARD_GSM_SIM_ONLY;
243
244 wpa_s->scard = scard_init(type);
245 if (wpa_s->scard == NULL) {
246 wpa_printf(MSG_WARNING, "Failed to initialize SIM "
247 "(pcsc-lite)");
248 return -1;
249 }
250 wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
251 eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
252#endif /* IEEE8021X_EAPOL */
253
254 return 0;
255}
256
257
258#ifndef CONFIG_NO_SCAN_PROCESSING
259static int wpa_supplicant_match_privacy(struct wpa_scan_res *bss,
260 struct wpa_ssid *ssid)
261{
262 int i, privacy = 0;
263
264 if (ssid->mixed_cell)
265 return 1;
266
0632542b
AT		 267#ifdef CONFIG_WPS
268 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
269 return 1;
270#endif /* CONFIG_WPS */
271
6fc6879b
JM		 272 for (i = 0; i < NUM_WEP_KEYS; i++) {
273 if (ssid->wep_key_len[i]) {
274 privacy = 1;
275 break;
276 }
277 }
278#ifdef IEEE8021X_EAPOL
279 if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
280 ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
281 EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
282 privacy = 1;
283#endif /* IEEE8021X_EAPOL */
284
285 if (bss->caps & IEEE80211_CAP_PRIVACY)
286 return privacy;
287 return !privacy;
288}
289
290
a6099152
JM		 291static int wpa_supplicant_ssid_bss_match(struct wpa_supplicant *wpa_s,
292 struct wpa_ssid *ssid,
6fc6879b
JM		 293 struct wpa_scan_res *bss)
294{
295 struct wpa_ie_data ie;
296 int proto_match = 0;
297 const u8 *rsn_ie, *wpa_ie;
351f09a2 298 int ret;
6fc6879b 299
a6099152 300 ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss);
351f09a2
JM		 301 if (ret >= 0)
302 return ret;
ad08c363 303
6fc6879b
JM		 304 rsn_ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
305 while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
306 proto_match++;
307
308 if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
309 wpa_printf(MSG_DEBUG, " skip RSN IE - parse failed");
310 break;
311 }
312 if (!(ie.proto & ssid->proto)) {
313 wpa_printf(MSG_DEBUG, " skip RSN IE - proto "
314 "mismatch");
315 break;
316 }
317
318 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
319 wpa_printf(MSG_DEBUG, " skip RSN IE - PTK cipher "
320 "mismatch");
321 break;
322 }
323
324 if (!(ie.group_cipher & ssid->group_cipher)) {
325 wpa_printf(MSG_DEBUG, " skip RSN IE - GTK cipher "
326 "mismatch");
327 break;
328 }
329
330 if (!(ie.key_mgmt & ssid->key_mgmt)) {
331 wpa_printf(MSG_DEBUG, " skip RSN IE - key mgmt "
332 "mismatch");
333 break;
334 }
335
336#ifdef CONFIG_IEEE80211W
0b60b0aa
JM		 337 if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
338 ssid->ieee80211w == IEEE80211W_REQUIRED) {
6fc6879b
JM		 339 wpa_printf(MSG_DEBUG, " skip RSN IE - no mgmt frame "
340 "protection");
341 break;
342 }
343#endif /* CONFIG_IEEE80211W */
344
345 wpa_printf(MSG_DEBUG, " selected based on RSN IE");
346 return 1;
347 }
348
349 wpa_ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
350 while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
351 proto_match++;
352
353 if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) {
354 wpa_printf(MSG_DEBUG, " skip WPA IE - parse failed");
355 break;
356 }
357 if (!(ie.proto & ssid->proto)) {
358 wpa_printf(MSG_DEBUG, " skip WPA IE - proto "
359 "mismatch");
360 break;
361 }
362
363 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
364 wpa_printf(MSG_DEBUG, " skip WPA IE - PTK cipher "
365 "mismatch");
366 break;
367 }
368
369 if (!(ie.group_cipher & ssid->group_cipher)) {
370 wpa_printf(MSG_DEBUG, " skip WPA IE - GTK cipher "
371 "mismatch");
372 break;
373 }
374
375 if (!(ie.key_mgmt & ssid->key_mgmt)) {
376 wpa_printf(MSG_DEBUG, " skip WPA IE - key mgmt "
377 "mismatch");
378 break;
379 }
380
381 wpa_printf(MSG_DEBUG, " selected based on WPA IE");
382 return 1;
383 }
384
385 if (proto_match == 0)
386 wpa_printf(MSG_DEBUG, " skip - no WPA/RSN proto match");
387
388 return 0;
389}
390
391
392static struct wpa_scan_res *
9cf32261
JM		 393wpa_supplicant_select_bss_wpa(struct wpa_supplicant *wpa_s,
394 struct wpa_ssid *group,
395 struct wpa_ssid **selected_ssid)
6fc6879b
JM		 396{
397 struct wpa_ssid *ssid;
9cf32261 398 struct wpa_scan_res *bss;
6fc6879b
JM		 399 size_t i;
400 struct wpa_blacklist *e;
401 const u8 *ie;
402
6fc6879b 403 wpa_printf(MSG_DEBUG, "Try to find WPA-enabled AP");
9cf32261 404 for (i = 0; i < wpa_s->scan_res->num; i++) {
6fc6879b
JM		 405 const u8 *ssid_;
406 u8 wpa_ie_len, rsn_ie_len, ssid_len;
407 bss = wpa_s->scan_res->res[i];
408
409 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
410 ssid_ = ie ? ie + 2 : (u8 *) "";
411 ssid_len = ie ? ie[1] : 0;
412
413 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
414 wpa_ie_len = ie ? ie[1] : 0;
415
416 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
417 rsn_ie_len = ie ? ie[1] : 0;
418
419 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
420 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
421 (int) i, MAC2STR(bss->bssid),
422 wpa_ssid_txt(ssid_, ssid_len),
423 wpa_ie_len, rsn_ie_len, bss->caps);
9cf32261 424
6fc6879b
JM		 425 e = wpa_blacklist_get(wpa_s, bss->bssid);
426 if (e && e->count > 1) {
427 wpa_printf(MSG_DEBUG, " skip - blacklisted");
428 continue;
429 }
430
e81634cd
JM		 431 if (ssid_len == 0) {
432 wpa_printf(MSG_DEBUG, " skip - SSID not known");
433 continue;
434 }
435
6fc6879b
JM		 436 if (wpa_ie_len == 0 && rsn_ie_len == 0) {
437 wpa_printf(MSG_DEBUG, " skip - no WPA/RSN IE");
438 continue;
439 }
440
441 for (ssid = group; ssid; ssid = ssid->pnext) {
ad08c363
JM		 442 int check_ssid = 1;
443
6fc6879b
JM		 444 if (ssid->disabled) {
445 wpa_printf(MSG_DEBUG, " skip - disabled");
446 continue;
447 }
9cf32261 448
ad08c363
JM		 449#ifdef CONFIG_WPS
450 if (ssid->ssid_len == 0 &&
a6099152 451 wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
ad08c363
JM		 452 check_ssid = 0;
453#endif /* CONFIG_WPS */
454
455 if (check_ssid &&
456 (ssid_len != ssid->ssid_len ||
457 os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
6fc6879b
JM		 458 wpa_printf(MSG_DEBUG, " skip - "
459 "SSID mismatch");
460 continue;
461 }
9cf32261 462
6fc6879b
JM		 463 if (ssid->bssid_set &&
464 os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
465 {
466 wpa_printf(MSG_DEBUG, " skip - "
467 "BSSID mismatch");
468 continue;
469 }
9cf32261 470
a6099152 471 if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
9cf32261
JM		 472 continue;
473
474 wpa_printf(MSG_DEBUG, " selected WPA AP "
475 MACSTR " ssid='%s'",
476 MAC2STR(bss->bssid),
477 wpa_ssid_txt(ssid_, ssid_len));
478 *selected_ssid = ssid;
479 return bss;
6fc6879b
JM		 480 }
481 }
482
9cf32261
JM		 483 return NULL;
484}
485
486
487static struct wpa_scan_res *
488wpa_supplicant_select_bss_non_wpa(struct wpa_supplicant *wpa_s,
489 struct wpa_ssid *group,
490 struct wpa_ssid **selected_ssid)
491{
492 struct wpa_ssid *ssid;
493 struct wpa_scan_res *bss;
494 size_t i;
495 struct wpa_blacklist *e;
496 const u8 *ie;
497
6fc6879b 498 wpa_printf(MSG_DEBUG, "Try to find non-WPA AP");
9cf32261 499 for (i = 0; i < wpa_s->scan_res->num; i++) {
6fc6879b
JM		 500 const u8 *ssid_;
501 u8 wpa_ie_len, rsn_ie_len, ssid_len;
502 bss = wpa_s->scan_res->res[i];
503
504 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
505 ssid_ = ie ? ie + 2 : (u8 *) "";
506 ssid_len = ie ? ie[1] : 0;
507
508 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
509 wpa_ie_len = ie ? ie[1] : 0;
510
511 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
512 rsn_ie_len = ie ? ie[1] : 0;
513
514 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
515 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
516 (int) i, MAC2STR(bss->bssid),
517 wpa_ssid_txt(ssid_, ssid_len),
518 wpa_ie_len, rsn_ie_len, bss->caps);
9cf32261 519
6fc6879b
JM		 520 e = wpa_blacklist_get(wpa_s, bss->bssid);
521 if (e && e->count > 1) {
522 wpa_printf(MSG_DEBUG, " skip - blacklisted");
523 continue;
524 }
9cf32261 525
e81634cd
JM		 526 if (ssid_len == 0) {
527 wpa_printf(MSG_DEBUG, " skip - SSID not known");
528 continue;
529 }
530
6fc6879b 531 for (ssid = group; ssid; ssid = ssid->pnext) {
ad08c363
JM		 532 int check_ssid = ssid->ssid_len != 0;
533
6fc6879b
JM		 534 if (ssid->disabled) {
535 wpa_printf(MSG_DEBUG, " skip - disabled");
536 continue;
537 }
9cf32261 538
ad08c363
JM		 539#ifdef CONFIG_WPS
540 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
541 /* Only allow wildcard SSID match if an AP
542 * advertises active WPS operation that matches
543 * with our mode. */
544 check_ssid = 1;
545 if (ssid->ssid_len == 0 &&
a6099152
JM		 546 wpas_wps_ssid_wildcard_ok(wpa_s, ssid,
547 bss))
ad08c363
JM		 548 check_ssid = 0;
549 }
550#endif /* CONFIG_WPS */
551
552 if (check_ssid &&
6fc6879b
JM		 553 (ssid_len != ssid->ssid_len ||
554 os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
555 wpa_printf(MSG_DEBUG, " skip - "
556 "SSID mismatch");
557 continue;
558 }
559
560 if (ssid->bssid_set &&
561 os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
562 {
563 wpa_printf(MSG_DEBUG, " skip - "
564 "BSSID mismatch");
565 continue;
566 }
1bd3f426 567
6fc6879b 568 if (!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
ad08c363 569 !(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
6fc6879b
JM		 570 !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
571 {
572 wpa_printf(MSG_DEBUG, " skip - "
573 "non-WPA network not allowed");
574 continue;
575 }
576
1bd3f426 577 if ((ssid->key_mgmt &
56586197
JM		 578 (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
579 WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK |
580 WPA_KEY_MGMT_IEEE8021X_SHA256 |
581 WPA_KEY_MGMT_PSK_SHA256)) &&
6fc6879b
JM		 582 (wpa_ie_len != 0 || rsn_ie_len != 0)) {
583 wpa_printf(MSG_DEBUG, " skip - "
584 "WPA network");
585 continue;
586 }
587
588 if (!wpa_supplicant_match_privacy(bss, ssid)) {
589 wpa_printf(MSG_DEBUG, " skip - "
590 "privacy mismatch");
591 continue;
592 }
593
594 if (bss->caps & IEEE80211_CAP_IBSS) {
595 wpa_printf(MSG_DEBUG, " skip - "
596 "IBSS (adhoc) network");
597 continue;
598 }
599
6fc6879b
JM		 600 wpa_printf(MSG_DEBUG, " selected non-WPA AP "
601 MACSTR " ssid='%s'",
602 MAC2STR(bss->bssid),
603 wpa_ssid_txt(ssid_, ssid_len));
9cf32261
JM		 604 *selected_ssid = ssid;
605 return bss;
6fc6879b
JM		 606 }
607 }
608
9cf32261
JM		 609 return NULL;
610}
611
612
613static struct wpa_scan_res *
614wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group,
615 struct wpa_ssid **selected_ssid)
616{
617 struct wpa_scan_res *selected;
618
619 wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
620 group->priority);
621
622 /* First, try to find WPA-enabled AP */
623 selected = wpa_supplicant_select_bss_wpa(wpa_s, group, selected_ssid);
624 if (selected)
625 return selected;
626
627 /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
628 * allows this. */
629 return wpa_supplicant_select_bss_non_wpa(wpa_s, group, selected_ssid);
6fc6879b
JM		 630}
631
632
09b9df4e
JM		 633static struct wpa_scan_res *
634wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,
635 struct wpa_ssid **selected_ssid)
6fc6879b 636{
6fc6879b 637 struct wpa_scan_res *selected = NULL;
09b9df4e
JM		 638 int prio;
639
640 while (selected == NULL) {
641 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
642 selected = wpa_supplicant_select_bss(
643 wpa_s, wpa_s->conf->pssid[prio],
644 selected_ssid);
645 if (selected)
646 break;
647 }
648
649 if (selected == NULL && wpa_s->blacklist) {
650 wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
651 "and try again");
652 wpa_blacklist_clear(wpa_s);
653 wpa_s->blacklist_cleared++;
654 } else if (selected == NULL)
655 break;
656 }
657
658 return selected;
659}
660
661
662static void wpa_supplicant_req_new_scan(struct wpa_supplicant *wpa_s,
663 int timeout)
664{
665 if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
666 /*
667 * Quick recovery if the initial scan results were not
668 * complete when fetched before the first scan request.
669 */
670 wpa_s->scan_res_tried++;
671 timeout = 0;
4f34d51a
SL		 672 } else if (!wpa_supplicant_enabled_networks(wpa_s->conf)) {
673 /*
674 * No networks are enabled; short-circuit request so
675 * we don't wait timeout seconds before transitioning
676 * to INACTIVE state.
677 */
678 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
679 return;
09b9df4e
JM		 680 }
681 wpa_supplicant_req_scan(wpa_s, timeout, 0);
682}
683
684
685static void wpa_supplicant_connect(struct wpa_supplicant *wpa_s,
686 struct wpa_scan_res *selected,
687 struct wpa_ssid *ssid)
688{
689 if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
690 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
691 "PBC session overlap");
692 wpa_supplicant_req_new_scan(wpa_s, 10);
693 return;
694 }
695
696 /*
697 * Do not trigger new association unless the BSSID has changed or if
698 * reassociation is requested. If we are in process of associating with
699 * the selected BSSID, do not trigger new attempt.
700 */
701 if (wpa_s->reassociate ||
702 (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
703 (wpa_s->wpa_state != WPA_ASSOCIATING ||
704 os_memcmp(selected->bssid, wpa_s->pending_bssid, ETH_ALEN) !=
705 0))) {
706 if (wpa_supplicant_scard_init(wpa_s, ssid)) {
707 wpa_supplicant_req_new_scan(wpa_s, 10);
708 return;
709 }
710 wpa_supplicant_associate(wpa_s, selected, ssid);
711 } else {
712 wpa_printf(MSG_DEBUG, "Already associated with the selected "
713 "AP");
714 }
09b9df4e
JM		 715}
716
717
b55aaa5f
JM		 718static struct wpa_ssid *
719wpa_supplicant_pick_new_network(struct wpa_supplicant *wpa_s)
720{
721 int prio;
722 struct wpa_ssid *ssid;
723
724 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
725 for (ssid = wpa_s->conf->pssid[prio]; ssid; ssid = ssid->pnext)
726 {
727 if (ssid->disabled)
728 continue;
729 if (ssid->mode == IEEE80211_MODE_IBSS ||
730 ssid->mode == IEEE80211_MODE_AP)
731 return ssid;
732 }
733 }
734 return NULL;
735}
736
737
6ae93185
JM		 738static void wpa_supplicant_rsn_preauth_scan_results(
739 struct wpa_supplicant *wpa_s)
740{
741 int i;
742
743 if (rsn_preauth_scan_results(wpa_s->wpa) < 0)
744 return;
745
746 for (i = wpa_s->scan_res->num - 1; i >= 0; i--) {
747 const u8 *ssid, *rsn;
748 struct wpa_scan_res *r;
749
750 r = wpa_s->scan_res->res[i];
751
752 ssid = wpa_scan_get_ie(r, WLAN_EID_SSID);
753 if (ssid == NULL)
754 continue;
755
756 rsn = wpa_scan_get_ie(r, WLAN_EID_RSN);
757 if (rsn == NULL)
758 continue;
759
760 rsn_preauth_scan_result(wpa_s->wpa, r->bssid, ssid, rsn);
761 }
762
763}
764
765
09b9df4e
JM		 766static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
767{
768 struct wpa_scan_res *selected;
6fc6879b
JM		 769 struct wpa_ssid *ssid = NULL;
770
cb8564b1
DW		 771 wpa_supplicant_notify_scanning(wpa_s, 0);
772
6fc6879b
JM		 773 if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
774 if (wpa_s->conf->ap_scan == 2)
775 return;
776 wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
777 "scanning again");
09b9df4e
JM		 778 wpa_supplicant_req_new_scan(wpa_s, 1);
779 return;
6fc6879b
JM		 780 }
781
23e07237
DN		 782 /*
783 * Don't post the results if this was the initial cached
784 * and there were no results.
785 */
786 if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1 &&
787 wpa_s->scan_res->num == 0) {
788 wpa_msg(wpa_s, MSG_DEBUG, "Cached scan results are "
789 "empty - not posting");
790 } else {
69856fad
JM		 791 wpa_printf(MSG_DEBUG, "New scan results available");
792 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
8bac466b 793 wpas_notify_scan_results(wpa_s);
23e07237 794 }
6fc6879b 795
8bac466b
JM		 796 wpas_notify_scan_done(wpa_s, 1);
797
3180d7a2 798 if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s)))
6fc6879b
JM		 799 return;
800
3180d7a2
SO		 801 if (wpa_s->disconnected) {
802 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
803 return;
804 }
805
60b94c98
JM		 806 if (bgscan_notify_scan(wpa_s) == 1)
807 return;
808
6ae93185
JM		 809 wpa_supplicant_rsn_preauth_scan_results(wpa_s);
810
09b9df4e 811 selected = wpa_supplicant_pick_network(wpa_s, &ssid);
6fc6879b 812 if (selected) {
09b9df4e 813 wpa_supplicant_connect(wpa_s, selected, ssid);
6fc6879b 814 } else {
09b9df4e 815 wpa_printf(MSG_DEBUG, "No suitable network found");
b55aaa5f
JM		 816 ssid = wpa_supplicant_pick_new_network(wpa_s);
817 if (ssid) {
818 wpa_printf(MSG_DEBUG, "Setup a new network");
819 wpa_supplicant_associate(wpa_s, NULL, ssid);
820 } else
821 wpa_supplicant_req_new_scan(wpa_s, 5);
6fc6879b 822 }
6fc6879b
JM		 823}
824#endif /* CONFIG_NO_SCAN_PROCESSING */
825
826
c2a04078
JM		 827#ifdef CONFIG_IEEE80211R
828static void wpa_assoc_set_ft_params(struct wpa_supplicant *wpa_s,
829 const u8 *ftie, const u8 *mdie)
830{
831 const u8 *mobility_domain = NULL;
832 const u8 *r0kh_id = NULL;
833 size_t r0kh_id_len = 0;
834 const u8 *r1kh_id = NULL;
835 struct rsn_ftie *hdr;
836 const u8 *pos, *end;
837
838 if (mdie == NULL || ftie == NULL)
839 return;
840
841 if (mdie[1] >= MOBILITY_DOMAIN_ID_LEN) {
842 mobility_domain = mdie + 2;
843#ifdef CONFIG_SME
844 wpa_s->sme.ft_used = 1;
845 os_memcpy(wpa_s->sme.mobility_domain, mobility_domain, 2);
846#endif /* CONFIG_SME */
847 }
848 if (ftie[1] >= sizeof(struct rsn_ftie)) {
849 end = ftie + 2 + ftie[1];
850 hdr = (struct rsn_ftie *) (ftie + 2);
851 pos = (const u8 *) (hdr + 1);
852 while (pos + 1 < end) {
853 if (pos + 2 + pos[1] > end)
854 break;
855 if (pos[0] == FTIE_SUBELEM_R1KH_ID &&
856 pos[1] == FT_R1KH_ID_LEN)
857 r1kh_id = pos + 2;
858 else if (pos[0] == FTIE_SUBELEM_R0KH_ID &&
859 pos[1] >= 1 && pos[1] <= FT_R0KH_ID_MAX_LEN) {
860 r0kh_id = pos + 2;
861 r0kh_id_len = pos[1];
862 }
863 pos += 2 + pos[1];
864 }
865 }
866 wpa_sm_set_ft_params(wpa_s->wpa, mobility_domain, r0kh_id,
867 r0kh_id_len, r1kh_id);
868}
869#endif /* CONFIG_IEEE80211R */
870
6fc6879b
JM		 871static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
872 union wpa_event_data *data)
873{
874 int l, len, found = 0, wpa_found, rsn_found;
c2a04078
JM		 875 const u8 *p;
876#ifdef CONFIG_IEEE80211R
877 const u8 *mdie = NULL, *ftie = NULL;
878#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 879
880 wpa_printf(MSG_DEBUG, "Association info event");
881 if (data->assoc_info.req_ies)
882 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
883 data->assoc_info.req_ies_len);
884 if (data->assoc_info.resp_ies)
885 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
886 data->assoc_info.resp_ies_len);
887 if (data->assoc_info.beacon_ies)
888 wpa_hexdump(MSG_DEBUG, "beacon_ies",
889 data->assoc_info.beacon_ies,
890 data->assoc_info.beacon_ies_len);
891
892 p = data->assoc_info.req_ies;
893 l = data->assoc_info.req_ies_len;
894
895 /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
896 while (p && l >= 2) {
897 len = p[1] + 2;
898 if (len > l) {
899 wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
900 p, l);
901 break;
902 }
903 if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
904 (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
905 (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
906 if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
907 break;
908 found = 1;
909 wpa_find_assoc_pmkid(wpa_s);
910 break;
911 }
912 l -= len;
913 p += len;
914 }
915 if (!found && data->assoc_info.req_ies)
916 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
917
c2a04078
JM		 918#ifdef CONFIG_IEEE80211R
919 p = data->assoc_info.resp_ies;
920 l = data->assoc_info.resp_ies_len;
921
94873e3b 922 /* Go through the IEs and make a copy of the FT/MD IE, if present. */
c2a04078
JM		 923 while (p && l >= 2) {
924 len = p[1] + 2;
925 if (len > l) {
926 wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
927 p, l);
928 break;
929 }
930 if (p[0] == WLAN_EID_FAST_BSS_TRANSITION)
931 ftie = p;
932 else if (p[0] == WLAN_EID_MOBILITY_DOMAIN)
933 mdie = p;
934 l -= len;
935 p += len;
936 }
937
938 wpa_assoc_set_ft_params(wpa_s, ftie, mdie);
939#endif /* CONFIG_IEEE80211R */
940
6fc6879b
JM		 941 /* WPA/RSN IE from Beacon/ProbeResp */
942 p = data->assoc_info.beacon_ies;
943 l = data->assoc_info.beacon_ies_len;
944
945 /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
946 */
947 wpa_found = rsn_found = 0;
948 while (p && l >= 2) {
949 len = p[1] + 2;
950 if (len > l) {
951 wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
952 p, l);
953 break;
954 }
955 if (!wpa_found &&
956 p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
957 os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
958 wpa_found = 1;
959 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
960 }
961
962 if (!rsn_found &&
963 p[0] == WLAN_EID_RSN && p[1] >= 2) {
964 rsn_found = 1;
965 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
966 }
967
968 l -= len;
969 p += len;
970 }
971
972 if (!wpa_found && data->assoc_info.beacon_ies)
973 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
974 if (!rsn_found && data->assoc_info.beacon_ies)
975 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
976 if (wpa_found || rsn_found)
977 wpa_s->ap_ies_from_associnfo = 1;
978}
979
980
981static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
982 union wpa_event_data *data)
983{
984 u8 bssid[ETH_ALEN];
985 int ft_completed = wpa_ft_is_completed(wpa_s->wpa);
8bac466b 986 int bssid_changed;
0194fedb 987 struct wpa_driver_capa capa;
6fc6879b
JM		 988
989 if (data)
990 wpa_supplicant_event_associnfo(wpa_s, data);
991
992 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
c2a04078 993 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
6fc6879b 994 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
c2a04078 995 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) ||
6fc6879b
JM		 996 (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
997 os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
998 wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
999 MACSTR, MAC2STR(bssid));
8bac466b 1000 bssid_changed = os_memcmp(wpa_s->bssid, bssid, ETH_ALEN);
6fc6879b
JM		 1001 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
1002 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
8bac466b
JM		 1003 if (bssid_changed)
1004 wpas_notify_bssid_changed(wpa_s);
1005
6fc6879b
JM		 1006 if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
1007 wpa_clear_keys(wpa_s, bssid);
1008 }
1009 if (wpa_supplicant_select_config(wpa_s) < 0) {
1010 wpa_supplicant_disassociate(
1011 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1012 return;
1013 }
1014 }
1015
62fa124c
JM		 1016#ifdef CONFIG_SME
1017 os_memcpy(wpa_s->sme.prev_bssid, bssid, ETH_ALEN);
1018 wpa_s->sme.prev_bssid_set = 1;
1019#endif /* CONFIG_SME */
1020
6fc6879b
JM		 1021 wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
1022 if (wpa_s->current_ssid) {
1023 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
1024 * initialized before association, but for other modes,
1025 * initialize PC/SC here, if the current configuration needs
1026 * smartcard or SIM/USIM. */
1027 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
1028 }
1029 wpa_sm_notify_assoc(wpa_s->wpa, bssid);
1030 l2_packet_notify_auth_start(wpa_s->l2);
1031
1032 /*
1033 * Set portEnabled first to FALSE in order to get EAP state machine out
1034 * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
1035 * state machine may transit to AUTHENTICATING state based on obsolete
1036 * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
1037 * AUTHENTICATED without ever giving chance to EAP state machine to
1038 * reset the state.
1039 */
1040 if (!ft_completed) {
1041 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
1042 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
1043 }
56586197 1044 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
6fc6879b
JM		 1045 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
1046 /* 802.1X::portControl = Auto */
1047 eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
1048 wpa_s->eapol_received = 0;
1049 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
9c972abb
JM		 1050 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE ||
1051 (wpa_s->current_ssid &&
1052 wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS)) {
6fc6879b
JM		 1053 wpa_supplicant_cancel_auth_timeout(wpa_s);
1054 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1055 } else if (!ft_completed) {
1056 /* Timeout for receiving the first EAPOL packet */
1057 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
1058 }
1059 wpa_supplicant_cancel_scan(wpa_s);
1060
c2a04078 1061 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
56586197 1062 wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
6fc6879b
JM		 1063 /*
1064 * We are done; the driver will take care of RSN 4-way
1065 * handshake.
1066 */
1067 wpa_supplicant_cancel_auth_timeout(wpa_s);
1068 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1069 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1070 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
1071 }
1ff73338
JM		 1072
1073 if (wpa_s->pending_eapol_rx) {
1074 struct os_time now, age;
1075 os_get_time(&now);
1076 os_time_sub(&now, &wpa_s->pending_eapol_rx_time, &age);
1077 if (age.sec == 0 && age.usec < 100000 &&
1078 os_memcmp(wpa_s->pending_eapol_rx_src, bssid, ETH_ALEN) ==
1079 0) {
1080 wpa_printf(MSG_DEBUG, "Process pending EAPOL frame "
1081 "that was received just before association "
1082 "notification");
1083 wpa_supplicant_rx_eapol(
1084 wpa_s, wpa_s->pending_eapol_rx_src,
1085 wpabuf_head(wpa_s->pending_eapol_rx),
1086 wpabuf_len(wpa_s->pending_eapol_rx));
1087 }
1088 wpabuf_free(wpa_s->pending_eapol_rx);
1089 wpa_s->pending_eapol_rx = NULL;
1090 }
60b94c98
JM		 1091
1092#ifdef CONFIG_BGSCAN
1093 if (wpa_s->current_ssid != wpa_s->bgscan_ssid) {
1094 bgscan_deinit(wpa_s);
1095 if (wpa_s->current_ssid && wpa_s->current_ssid->bgscan) {
1096 if (bgscan_init(wpa_s, wpa_s->current_ssid)) {
1097 wpa_printf(MSG_DEBUG, "Failed to initialize "
1098 "bgscan");
1099 /*
1100 * Live without bgscan; it is only used as a
1101 * roaming optimization, so the initial
1102 * connection is not affected.
1103 */
1104 } else
1105 wpa_s->bgscan_ssid = wpa_s->current_ssid;
1106 } else
1107 wpa_s->bgscan_ssid = NULL;
1108 }
1109#endif /* CONFIG_BGSCAN */
0194fedb
JB		 1110
1111 if ((wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1112 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
1113 wpa_s->current_ssid && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1114 capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE) {
1115 /* Set static WEP keys again */
1116 wpa_set_wep_keys(wpa_s, wpa_s->current_ssid);
1117 }
6fc6879b
JM		 1118}
1119
1120
1121static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
1122{
1123 const u8 *bssid;
6d6f4bb8
JM		 1124#ifdef CONFIG_SME
1125 int authenticating;
1126 u8 prev_pending_bssid[ETH_ALEN];
1127
1128 authenticating = wpa_s->wpa_state == WPA_AUTHENTICATING;
1129 os_memcpy(prev_pending_bssid, wpa_s->pending_bssid, ETH_ALEN);
1130#endif /* CONFIG_SME */
6fc6879b
JM		 1131
1132 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1133 /*
1134 * At least Host AP driver and a Prism3 card seemed to be
1135 * generating streams of disconnected events when configuring
1136 * IBSS for WPA-None. Ignore them for now.
1137 */
1138 wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
1139 "IBSS/WPA-None mode");
1140 return;
1141 }
1142
1143 if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
56586197 1144 wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
6fc6879b
JM		 1145 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
1146 "pre-shared key may be incorrect");
1147 }
1148 if (wpa_s->wpa_state >= WPA_ASSOCIATED)
1149 wpa_supplicant_req_scan(wpa_s, 0, 100000);
1150 bssid = wpa_s->bssid;
a8e16edc 1151 if (is_zero_ether_addr(bssid))
6fc6879b
JM		 1152 bssid = wpa_s->pending_bssid;
1153 wpa_blacklist_add(wpa_s, bssid);
1154 wpa_sm_notify_disassoc(wpa_s->wpa);
1155 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
1156 "remove keys");
1157 if (wpa_supplicant_dynamic_keys(wpa_s)) {
1158 wpa_s->keys_cleared = 0;
1159 wpa_clear_keys(wpa_s, wpa_s->bssid);
1160 }
1161 wpa_supplicant_mark_disassoc(wpa_s);
60b94c98 1162 bgscan_deinit(wpa_s);
6d6f4bb8
JM		 1163#ifdef CONFIG_SME
1164 if (authenticating &&
1165 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)) {
1166 /*
1167 * mac80211-workaround to force deauth on failed auth cmd,
1168 * requires us to remain in authenticating state to allow the
1169 * second authentication attempt to be continued properly.
1170 */
1171 wpa_printf(MSG_DEBUG, "SME: Allow pending authentication to "
1172 "proceed after disconnection event");
1173 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1174 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1175 }
1176#endif /* CONFIG_SME */
6fc6879b
JM		 1177}
1178
1179
46690a3b
JM		 1180#ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1181static void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx,
1182 void *sock_ctx)
1183{
1184 struct wpa_supplicant *wpa_s = eloop_ctx;
1185
1186 if (!wpa_s->pending_mic_error_report)
1187 return;
1188
1189 wpa_printf(MSG_DEBUG, "WPA: Sending pending MIC error report");
1190 wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
1191 wpa_s->pending_mic_error_report = 0;
1192}
1193#endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1194
1195
6fc6879b
JM		 1196static void
1197wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
1198 union wpa_event_data *data)
1199{
1200 int pairwise;
1201 struct os_time t;
1202
1203 wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
1204 pairwise = (data && data->michael_mic_failure.unicast);
6fc6879b 1205 os_get_time(&t);
46690a3b
JM		 1206 if ((wpa_s->last_michael_mic_error &&
1207 t.sec - wpa_s->last_michael_mic_error <= 60) ||
1208 wpa_s->pending_mic_error_report) {
1209 if (wpa_s->pending_mic_error_report) {
1210 /*
1211 * Send the pending MIC error report immediately since
1212 * we are going to start countermeasures and AP better
1213 * do the same.
1214 */
1215 wpa_sm_key_request(wpa_s->wpa, 1,
1216 wpa_s->pending_mic_error_pairwise);
1217 }
1218
1219 /* Send the new MIC error report immediately since we are going
1220 * to start countermeasures and AP better do the same.
1221 */
1222 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1223
6fc6879b
JM		 1224 /* initialize countermeasures */
1225 wpa_s->countermeasures = 1;
1226 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
1227
1228 /*
1229 * Need to wait for completion of request frame. We do not get
1230 * any callback for the message completion, so just wait a
1231 * short while and hope for the best. */
1232 os_sleep(0, 10000);
1233
1234 wpa_drv_set_countermeasures(wpa_s, 1);
1235 wpa_supplicant_deauthenticate(wpa_s,
1236 WLAN_REASON_MICHAEL_MIC_FAILURE);
1237 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
1238 wpa_s, NULL);
1239 eloop_register_timeout(60, 0,
1240 wpa_supplicant_stop_countermeasures,
1241 wpa_s, NULL);
1242 /* TODO: mark the AP rejected for 60 second. STA is
1243 * allowed to associate with another AP.. */
46690a3b
JM		 1244 } else {
1245#ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1246 if (wpa_s->mic_errors_seen) {
1247 /*
1248 * Reduce the effectiveness of Michael MIC error
1249 * reports as a means for attacking against TKIP if
1250 * more than one MIC failure is noticed with the same
1251 * PTK. We delay the transmission of the reports by a
1252 * random time between 0 and 60 seconds in order to
1253 * force the attacker wait 60 seconds before getting
1254 * the information on whether a frame resulted in a MIC
1255 * failure.
1256 */
1257 u8 rval[4];
1258 int sec;
1259
1260 if (os_get_random(rval, sizeof(rval)) < 0)
1261 sec = os_random() % 60;
1262 else
1263 sec = WPA_GET_BE32(rval) % 60;
1264 wpa_printf(MSG_DEBUG, "WPA: Delay MIC error report %d "
1265 "seconds", sec);
1266 wpa_s->pending_mic_error_report = 1;
1267 wpa_s->pending_mic_error_pairwise = pairwise;
1268 eloop_cancel_timeout(
1269 wpa_supplicant_delayed_mic_error_report,
1270 wpa_s, NULL);
1271 eloop_register_timeout(
1272 sec, os_random() % 1000000,
1273 wpa_supplicant_delayed_mic_error_report,
1274 wpa_s, NULL);
1275 } else {
1276 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1277 }
1278#else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1279 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1280#endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
6fc6879b
JM		 1281 }
1282 wpa_s->last_michael_mic_error = t.sec;
46690a3b 1283 wpa_s->mic_errors_seen++;
6fc6879b
JM		 1284}
1285
1286
a83d9c96
SL		 1287#ifdef CONFIG_TERMINATE_ONLASTIF
1288static int any_interfaces(struct wpa_supplicant *head)
1289{
1290 struct wpa_supplicant *wpa_s;
1291
1292 for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
1293 if (!wpa_s->interface_removed)
1294 return 1;
1295 return 0;
1296}
1297#endif /* CONFIG_TERMINATE_ONLASTIF */
1298
1299
6fc6879b
JM		 1300static void
1301wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
1302 union wpa_event_data *data)
1303{
1304 if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
1305 return;
1306
1307 switch (data->interface_status.ievent) {
1308 case EVENT_INTERFACE_ADDED:
1309 if (!wpa_s->interface_removed)
1310 break;
1311 wpa_s->interface_removed = 0;
1312 wpa_printf(MSG_DEBUG, "Configured interface was added.");
1313 if (wpa_supplicant_driver_init(wpa_s) < 0) {
1314 wpa_printf(MSG_INFO, "Failed to initialize the driver "
1315 "after interface was added.");
1316 }
1317 break;
1318 case EVENT_INTERFACE_REMOVED:
1319 wpa_printf(MSG_DEBUG, "Configured interface was removed.");
1320 wpa_s->interface_removed = 1;
1321 wpa_supplicant_mark_disassoc(wpa_s);
1322 l2_packet_deinit(wpa_s->l2);
1323 wpa_s->l2 = NULL;
a83d9c96
SL		 1324#ifdef CONFIG_TERMINATE_ONLASTIF
1325 /* check if last interface */
1326 if (!any_interfaces(wpa_s->global->ifaces))
1327 eloop_terminate();
1328#endif /* CONFIG_TERMINATE_ONLASTIF */
6fc6879b
JM		 1329 break;
1330 }
1331}
1332
1333
1334#ifdef CONFIG_PEERKEY
1335static void
1336wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
1337 union wpa_event_data *data)
1338{
1339 if (data == NULL)
1340 return;
1341 wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
1342}
1343#endif /* CONFIG_PEERKEY */
1344
1345
1346#ifdef CONFIG_IEEE80211R
1347static void
1348wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
1349 union wpa_event_data *data)
1350{
1351 if (data == NULL)
1352 return;
1353
1354 if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
1355 data->ft_ies.ies_len,
1356 data->ft_ies.ft_action,
babfbf15
JM		 1357 data->ft_ies.target_ap,
1358 data->ft_ies.ric_ies,
1359 data->ft_ies.ric_ies_len) < 0) {
6fc6879b
JM		 1360 /* TODO: prevent MLME/driver from trying to associate? */
1361 }
1362}
1363#endif /* CONFIG_IEEE80211R */
1364
1365
11ef8d35
JM		 1366#ifdef CONFIG_IBSS_RSN
1367static void wpa_supplicant_event_ibss_rsn_start(struct wpa_supplicant *wpa_s,
1368 union wpa_event_data *data)
1369{
1370 if (data == NULL)
1371 return;
1372 ibss_rsn_start(wpa_s->ibss_rsn, data->ibss_rsn_start.peer);
1373}
1374#endif /* CONFIG_IBSS_RSN */
1375
1376
6fc6879b
JM		 1377void wpa_supplicant_event(void *ctx, wpa_event_type event,
1378 union wpa_event_data *data)
1379{
1380 struct wpa_supplicant *wpa_s = ctx;
1381
1382 switch (event) {
c2a04078
JM		 1383 case EVENT_AUTH:
1384 sme_event_auth(wpa_s, data);
1385 break;
6fc6879b
JM		 1386 case EVENT_ASSOC:
1387 wpa_supplicant_event_assoc(wpa_s, data);
1388 break;
1389 case EVENT_DISASSOC:
0e379654
JM		 1390 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
1391 sme_event_disassoc(wpa_s, data);
a84ed99e
JM		 1392 /* fall through */
1393 case EVENT_DEAUTH:
6fc6879b
JM		 1394 wpa_supplicant_event_disassoc(wpa_s);
1395 break;
1396 case EVENT_MICHAEL_MIC_FAILURE:
1397 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
1398 break;
1399#ifndef CONFIG_NO_SCAN_PROCESSING
1400 case EVENT_SCAN_RESULTS:
1401 wpa_supplicant_event_scan_results(wpa_s);
1402 break;
1403#endif /* CONFIG_NO_SCAN_PROCESSING */
1404 case EVENT_ASSOCINFO:
1405 wpa_supplicant_event_associnfo(wpa_s, data);
1406 break;
1407 case EVENT_INTERFACE_STATUS:
1408 wpa_supplicant_event_interface_status(wpa_s, data);
1409 break;
1410 case EVENT_PMKID_CANDIDATE:
1411 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
1412 break;
1413#ifdef CONFIG_PEERKEY
1414 case EVENT_STKSTART:
1415 wpa_supplicant_event_stkstart(wpa_s, data);
1416 break;
1417#endif /* CONFIG_PEERKEY */
1418#ifdef CONFIG_IEEE80211R
1419 case EVENT_FT_RESPONSE:
1420 wpa_supplicant_event_ft_response(wpa_s, data);
1421 break;
1422#endif /* CONFIG_IEEE80211R */
11ef8d35
JM		 1423#ifdef CONFIG_IBSS_RSN
1424 case EVENT_IBSS_RSN_START:
1425 wpa_supplicant_event_ibss_rsn_start(wpa_s, data);
1426 break;
1427#endif /* CONFIG_IBSS_RSN */
efa46078
JM		 1428 case EVENT_ASSOC_REJECT:
1429 sme_event_assoc_reject(wpa_s, data);
1430 break;
da1fb17c
JM		 1431 case EVENT_AUTH_TIMED_OUT:
1432 sme_event_auth_timed_out(wpa_s, data);
1433 break;
1434 case EVENT_ASSOC_TIMED_OUT:
1435 sme_event_assoc_timed_out(wpa_s, data);
1436 break;
f8b1f695
JM		 1437#ifdef CONFIG_AP
1438 case EVENT_TX_STATUS:
1439 if (wpa_s->ap_iface == NULL)
1440 break;
1441 switch (data->tx_status.type) {
1442 case WLAN_FC_TYPE_MGMT:
1443 ap_mgmt_tx_cb(wpa_s, data->tx_status.data,
1444 data->tx_status.data_len,
1445 data->tx_status.stype,
1446 data->tx_status.ack);
1447 break;
1448 case WLAN_FC_TYPE_DATA:
1449 ap_tx_status(wpa_s, data->tx_status.dst,
1450 data->tx_status.data,
1451 data->tx_status.data_len,
1452 data->tx_status.ack);
1453 break;
1454 }
1455 break;
1456 case EVENT_RX_FROM_UNKNOWN:
1457 if (wpa_s->ap_iface == NULL)
1458 break;
1459 ap_rx_from_unknown_sta(wpa_s, data->rx_from_unknown.hdr,
1460 data->rx_from_unknown.len);
1461 break;
1462 case EVENT_RX_MGMT:
1463 if (wpa_s->ap_iface == NULL)
1464 break;
1465 ap_mgmt_rx(wpa_s, data->rx_mgmt.frame,
1466 data->rx_mgmt.frame_len, data->rx_mgmt.fi);
1467 break;
1468#endif /* CONFIG_AP */
6fc6879b
JM		 1469 default:
1470 wpa_printf(MSG_INFO, "Unknown event %d", event);
1471 break;
1472 }
1473}
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