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Preparations for 0.6.6 release
[thirdparty/hostap.git] / wpa_supplicant / events.c
CommitLineData
6fc6879b
JM		 1/*
2 * WPA Supplicant - Driver event processing
3 * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15#include "includes.h"
16
17#include "common.h"
18#include "eapol_supp/eapol_supp_sm.h"
19#include "wpa.h"
20#include "eloop.h"
21#include "drivers/driver.h"
22#include "config.h"
23#include "l2_packet/l2_packet.h"
24#include "wpa_supplicant_i.h"
25#include "pcsc_funcs.h"
26#include "preauth.h"
27#include "pmksa_cache.h"
28#include "wpa_ctrl.h"
29#include "eap_peer/eap.h"
30#include "ctrl_iface_dbus.h"
31#include "ieee802_11_defs.h"
32#include "blacklist.h"
33#include "wpas_glue.h"
34
35
36static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
37{
38 struct wpa_ssid *ssid;
39
40 if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
41 return 0;
42
43 wpa_printf(MSG_DEBUG, "Select network based on association "
44 "information");
45 ssid = wpa_supplicant_get_ssid(wpa_s);
46 if (ssid == NULL) {
47 wpa_printf(MSG_INFO, "No network configuration found for the "
48 "current AP");
49 return -1;
50 }
51
52 if (ssid->disabled) {
53 wpa_printf(MSG_DEBUG, "Selected network is disabled");
54 return -1;
55 }
56
57 wpa_printf(MSG_DEBUG, "Network configuration found for the current "
58 "AP");
59 if (ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
60 WPA_KEY_MGMT_WPA_NONE |
56586197
JM		 61 WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_FT_IEEE8021X |
62 WPA_KEY_MGMT_PSK_SHA256 |
63 WPA_KEY_MGMT_IEEE8021X_SHA256)) {
6fc6879b
JM		 64 u8 wpa_ie[80];
65 size_t wpa_ie_len = sizeof(wpa_ie);
66 wpa_supplicant_set_suites(wpa_s, NULL, ssid,
67 wpa_ie, &wpa_ie_len);
68 } else {
69 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
70 }
71
72 if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
73 eapol_sm_invalidate_cached_session(wpa_s->eapol);
74 wpa_s->current_ssid = ssid;
75 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
76 wpa_supplicant_initiate_eapol(wpa_s);
77
78 return 0;
79}
80
81
82static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
83 void *sock_ctx)
84{
85 struct wpa_supplicant *wpa_s = eloop_ctx;
86
87 if (wpa_s->countermeasures) {
88 wpa_s->countermeasures = 0;
89 wpa_drv_set_countermeasures(wpa_s, 0);
90 wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
91 wpa_supplicant_req_scan(wpa_s, 0, 0);
92 }
93}
94
95
96void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
97{
98 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
99 os_memset(wpa_s->bssid, 0, ETH_ALEN);
100 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
101 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
102 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
56586197 103 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
6fc6879b
JM		 104 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
105 wpa_s->ap_ies_from_associnfo = 0;
106}
107
108
109static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
110{
111 struct wpa_ie_data ie;
112 int pmksa_set = -1;
113 size_t i;
114
115 if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
116 ie.pmkid == NULL)
117 return;
118
119 for (i = 0; i < ie.num_pmkid; i++) {
120 pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
121 ie.pmkid + i * PMKID_LEN,
122 NULL, NULL, 0);
123 if (pmksa_set == 0) {
124 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
125 break;
126 }
127 }
128
129 wpa_printf(MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from PMKSA "
130 "cache", pmksa_set == 0 ? "" : "not ");
131}
132
133
134static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
135 union wpa_event_data *data)
136{
137 if (data == NULL) {
138 wpa_printf(MSG_DEBUG, "RSN: No data in PMKID candidate event");
139 return;
140 }
141 wpa_printf(MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
142 " index=%d preauth=%d",
143 MAC2STR(data->pmkid_candidate.bssid),
144 data->pmkid_candidate.index,
145 data->pmkid_candidate.preauth);
146
147 pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
148 data->pmkid_candidate.index,
149 data->pmkid_candidate.preauth);
150}
151
152
153static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
154{
155 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
156 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
157 return 0;
158
159#ifdef IEEE8021X_EAPOL
160 if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
161 wpa_s->current_ssid &&
162 !(wpa_s->current_ssid->eapol_flags &
163 (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
164 EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
165 /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
166 * plaintext or static WEP keys). */
167 return 0;
168 }
169#endif /* IEEE8021X_EAPOL */
170
171 return 1;
172}
173
174
175/**
176 * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
177 * @wpa_s: pointer to wpa_supplicant data
178 * @ssid: Configuration data for the network
179 * Returns: 0 on success, -1 on failure
180 *
181 * This function is called when starting authentication with a network that is
182 * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
183 */
184int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
185 struct wpa_ssid *ssid)
186{
187#ifdef IEEE8021X_EAPOL
188 int aka = 0, sim = 0, type;
189
190 if (ssid->eap.pcsc == NULL || wpa_s->scard != NULL)
191 return 0;
192
193 if (ssid->eap.eap_methods == NULL) {
194 sim = 1;
195 aka = 1;
196 } else {
197 struct eap_method_type *eap = ssid->eap.eap_methods;
198 while (eap->vendor != EAP_VENDOR_IETF ||
199 eap->method != EAP_TYPE_NONE) {
200 if (eap->vendor == EAP_VENDOR_IETF) {
201 if (eap->method == EAP_TYPE_SIM)
202 sim = 1;
203 else if (eap->method == EAP_TYPE_AKA)
204 aka = 1;
205 }
206 eap++;
207 }
208 }
209
210 if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
211 sim = 0;
212 if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL)
213 aka = 0;
214
215 if (!sim && !aka) {
216 wpa_printf(MSG_DEBUG, "Selected network is configured to use "
217 "SIM, but neither EAP-SIM nor EAP-AKA are enabled");
218 return 0;
219 }
220
221 wpa_printf(MSG_DEBUG, "Selected network is configured to use SIM "
222 "(sim=%d aka=%d) - initialize PCSC", sim, aka);
223 if (sim && aka)
224 type = SCARD_TRY_BOTH;
225 else if (aka)
226 type = SCARD_USIM_ONLY;
227 else
228 type = SCARD_GSM_SIM_ONLY;
229
230 wpa_s->scard = scard_init(type);
231 if (wpa_s->scard == NULL) {
232 wpa_printf(MSG_WARNING, "Failed to initialize SIM "
233 "(pcsc-lite)");
234 return -1;
235 }
236 wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
237 eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
238#endif /* IEEE8021X_EAPOL */
239
240 return 0;
241}
242
243
244#ifndef CONFIG_NO_SCAN_PROCESSING
245static int wpa_supplicant_match_privacy(struct wpa_scan_res *bss,
246 struct wpa_ssid *ssid)
247{
248 int i, privacy = 0;
249
250 if (ssid->mixed_cell)
251 return 1;
252
253 for (i = 0; i < NUM_WEP_KEYS; i++) {
254 if (ssid->wep_key_len[i]) {
255 privacy = 1;
256 break;
257 }
258 }
259#ifdef IEEE8021X_EAPOL
260 if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
261 ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
262 EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
263 privacy = 1;
264#endif /* IEEE8021X_EAPOL */
265
266 if (bss->caps & IEEE80211_CAP_PRIVACY)
267 return privacy;
268 return !privacy;
269}
270
271
272static int wpa_supplicant_ssid_bss_match(struct wpa_ssid *ssid,
273 struct wpa_scan_res *bss)
274{
275 struct wpa_ie_data ie;
276 int proto_match = 0;
277 const u8 *rsn_ie, *wpa_ie;
278
279 rsn_ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
280 while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
281 proto_match++;
282
283 if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
284 wpa_printf(MSG_DEBUG, " skip RSN IE - parse failed");
285 break;
286 }
287 if (!(ie.proto & ssid->proto)) {
288 wpa_printf(MSG_DEBUG, " skip RSN IE - proto "
289 "mismatch");
290 break;
291 }
292
293 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
294 wpa_printf(MSG_DEBUG, " skip RSN IE - PTK cipher "
295 "mismatch");
296 break;
297 }
298
299 if (!(ie.group_cipher & ssid->group_cipher)) {
300 wpa_printf(MSG_DEBUG, " skip RSN IE - GTK cipher "
301 "mismatch");
302 break;
303 }
304
305 if (!(ie.key_mgmt & ssid->key_mgmt)) {
306 wpa_printf(MSG_DEBUG, " skip RSN IE - key mgmt "
307 "mismatch");
308 break;
309 }
310
311#ifdef CONFIG_IEEE80211W
0b60b0aa
JM		 312 if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
313 ssid->ieee80211w == IEEE80211W_REQUIRED) {
6fc6879b
JM		 314 wpa_printf(MSG_DEBUG, " skip RSN IE - no mgmt frame "
315 "protection");
316 break;
317 }
318#endif /* CONFIG_IEEE80211W */
319
320 wpa_printf(MSG_DEBUG, " selected based on RSN IE");
321 return 1;
322 }
323
324 wpa_ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
325 while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
326 proto_match++;
327
328 if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) {
329 wpa_printf(MSG_DEBUG, " skip WPA IE - parse failed");
330 break;
331 }
332 if (!(ie.proto & ssid->proto)) {
333 wpa_printf(MSG_DEBUG, " skip WPA IE - proto "
334 "mismatch");
335 break;
336 }
337
338 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
339 wpa_printf(MSG_DEBUG, " skip WPA IE - PTK cipher "
340 "mismatch");
341 break;
342 }
343
344 if (!(ie.group_cipher & ssid->group_cipher)) {
345 wpa_printf(MSG_DEBUG, " skip WPA IE - GTK cipher "
346 "mismatch");
347 break;
348 }
349
350 if (!(ie.key_mgmt & ssid->key_mgmt)) {
351 wpa_printf(MSG_DEBUG, " skip WPA IE - key mgmt "
352 "mismatch");
353 break;
354 }
355
356 wpa_printf(MSG_DEBUG, " selected based on WPA IE");
357 return 1;
358 }
359
360 if (proto_match == 0)
361 wpa_printf(MSG_DEBUG, " skip - no WPA/RSN proto match");
362
363 return 0;
364}
365
366
367static struct wpa_scan_res *
9cf32261
JM		 368wpa_supplicant_select_bss_wpa(struct wpa_supplicant *wpa_s,
369 struct wpa_ssid *group,
370 struct wpa_ssid **selected_ssid)
6fc6879b
JM		 371{
372 struct wpa_ssid *ssid;
9cf32261 373 struct wpa_scan_res *bss;
6fc6879b
JM		 374 size_t i;
375 struct wpa_blacklist *e;
376 const u8 *ie;
377
6fc6879b 378 wpa_printf(MSG_DEBUG, "Try to find WPA-enabled AP");
9cf32261 379 for (i = 0; i < wpa_s->scan_res->num; i++) {
6fc6879b
JM		 380 const u8 *ssid_;
381 u8 wpa_ie_len, rsn_ie_len, ssid_len;
382 bss = wpa_s->scan_res->res[i];
383
384 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
385 ssid_ = ie ? ie + 2 : (u8 *) "";
386 ssid_len = ie ? ie[1] : 0;
387
388 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
389 wpa_ie_len = ie ? ie[1] : 0;
390
391 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
392 rsn_ie_len = ie ? ie[1] : 0;
393
394 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
395 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
396 (int) i, MAC2STR(bss->bssid),
397 wpa_ssid_txt(ssid_, ssid_len),
398 wpa_ie_len, rsn_ie_len, bss->caps);
9cf32261 399
6fc6879b
JM		 400 e = wpa_blacklist_get(wpa_s, bss->bssid);
401 if (e && e->count > 1) {
402 wpa_printf(MSG_DEBUG, " skip - blacklisted");
403 continue;
404 }
405
406 if (wpa_ie_len == 0 && rsn_ie_len == 0) {
407 wpa_printf(MSG_DEBUG, " skip - no WPA/RSN IE");
408 continue;
409 }
410
411 for (ssid = group; ssid; ssid = ssid->pnext) {
412 if (ssid->disabled) {
413 wpa_printf(MSG_DEBUG, " skip - disabled");
414 continue;
415 }
9cf32261 416
6fc6879b
JM		 417 if (ssid_len != ssid->ssid_len ||
418 os_memcmp(ssid_, ssid->ssid, ssid_len) != 0) {
419 wpa_printf(MSG_DEBUG, " skip - "
420 "SSID mismatch");
421 continue;
422 }
9cf32261 423
6fc6879b
JM		 424 if (ssid->bssid_set &&
425 os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
426 {
427 wpa_printf(MSG_DEBUG, " skip - "
428 "BSSID mismatch");
429 continue;
430 }
9cf32261
JM		 431
432 if (!wpa_supplicant_ssid_bss_match(ssid, bss))
433 continue;
434
435 wpa_printf(MSG_DEBUG, " selected WPA AP "
436 MACSTR " ssid='%s'",
437 MAC2STR(bss->bssid),
438 wpa_ssid_txt(ssid_, ssid_len));
439 *selected_ssid = ssid;
440 return bss;
6fc6879b
JM		 441 }
442 }
443
9cf32261
JM		 444 return NULL;
445}
446
447
448static struct wpa_scan_res *
449wpa_supplicant_select_bss_non_wpa(struct wpa_supplicant *wpa_s,
450 struct wpa_ssid *group,
451 struct wpa_ssid **selected_ssid)
452{
453 struct wpa_ssid *ssid;
454 struct wpa_scan_res *bss;
455 size_t i;
456 struct wpa_blacklist *e;
457 const u8 *ie;
458
6fc6879b 459 wpa_printf(MSG_DEBUG, "Try to find non-WPA AP");
9cf32261 460 for (i = 0; i < wpa_s->scan_res->num; i++) {
6fc6879b
JM		 461 const u8 *ssid_;
462 u8 wpa_ie_len, rsn_ie_len, ssid_len;
463 bss = wpa_s->scan_res->res[i];
464
465 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
466 ssid_ = ie ? ie + 2 : (u8 *) "";
467 ssid_len = ie ? ie[1] : 0;
468
469 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
470 wpa_ie_len = ie ? ie[1] : 0;
471
472 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
473 rsn_ie_len = ie ? ie[1] : 0;
474
475 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
476 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
477 (int) i, MAC2STR(bss->bssid),
478 wpa_ssid_txt(ssid_, ssid_len),
479 wpa_ie_len, rsn_ie_len, bss->caps);
9cf32261 480
6fc6879b
JM		 481 e = wpa_blacklist_get(wpa_s, bss->bssid);
482 if (e && e->count > 1) {
483 wpa_printf(MSG_DEBUG, " skip - blacklisted");
484 continue;
485 }
9cf32261 486
6fc6879b
JM		 487 for (ssid = group; ssid; ssid = ssid->pnext) {
488 if (ssid->disabled) {
489 wpa_printf(MSG_DEBUG, " skip - disabled");
490 continue;
491 }
9cf32261 492
6fc6879b
JM		 493 if (ssid->ssid_len != 0 &&
494 (ssid_len != ssid->ssid_len ||
495 os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
496 wpa_printf(MSG_DEBUG, " skip - "
497 "SSID mismatch");
498 continue;
499 }
500
501 if (ssid->bssid_set &&
502 os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
503 {
504 wpa_printf(MSG_DEBUG, " skip - "
505 "BSSID mismatch");
506 continue;
507 }
508
509 if (!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
510 !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
511 {
512 wpa_printf(MSG_DEBUG, " skip - "
513 "non-WPA network not allowed");
514 continue;
515 }
516
517 if ((ssid->key_mgmt &
56586197
JM		 518 (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
519 WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK |
520 WPA_KEY_MGMT_IEEE8021X_SHA256 |
521 WPA_KEY_MGMT_PSK_SHA256)) &&
6fc6879b
JM		 522 (wpa_ie_len != 0 || rsn_ie_len != 0)) {
523 wpa_printf(MSG_DEBUG, " skip - "
524 "WPA network");
525 continue;
526 }
527
528 if (!wpa_supplicant_match_privacy(bss, ssid)) {
529 wpa_printf(MSG_DEBUG, " skip - "
530 "privacy mismatch");
531 continue;
532 }
533
534 if (bss->caps & IEEE80211_CAP_IBSS) {
535 wpa_printf(MSG_DEBUG, " skip - "
536 "IBSS (adhoc) network");
537 continue;
538 }
539
6fc6879b
JM		 540 wpa_printf(MSG_DEBUG, " selected non-WPA AP "
541 MACSTR " ssid='%s'",
542 MAC2STR(bss->bssid),
543 wpa_ssid_txt(ssid_, ssid_len));
9cf32261
JM		 544 *selected_ssid = ssid;
545 return bss;
6fc6879b
JM		 546 }
547 }
548
9cf32261
JM		 549 return NULL;
550}
551
552
553static struct wpa_scan_res *
554wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group,
555 struct wpa_ssid **selected_ssid)
556{
557 struct wpa_scan_res *selected;
558
559 wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
560 group->priority);
561
562 /* First, try to find WPA-enabled AP */
563 selected = wpa_supplicant_select_bss_wpa(wpa_s, group, selected_ssid);
564 if (selected)
565 return selected;
566
567 /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
568 * allows this. */
569 return wpa_supplicant_select_bss_non_wpa(wpa_s, group, selected_ssid);
6fc6879b
JM		 570}
571
572
573static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
574{
575 int prio, timeout;
576 struct wpa_scan_res *selected = NULL;
577 struct wpa_ssid *ssid = NULL;
578
579 if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
580 if (wpa_s->conf->ap_scan == 2)
581 return;
582 wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
583 "scanning again");
584 timeout = 1;
585 goto req_scan;
586 }
587
23e07237
DN		 588 /*
589 * Don't post the results if this was the initial cached
590 * and there were no results.
591 */
592 if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1 &&
593 wpa_s->scan_res->num == 0) {
594 wpa_msg(wpa_s, MSG_DEBUG, "Cached scan results are "
595 "empty - not posting");
596 } else {
597 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
598 wpa_supplicant_dbus_notify_scan_results(wpa_s);
599 }
6fc6879b
JM		 600
601 if (wpa_s->conf->ap_scan == 2 || wpa_s->disconnected)
602 return;
603
604 while (selected == NULL) {
605 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
606 selected = wpa_supplicant_select_bss(
607 wpa_s, wpa_s->conf->pssid[prio], &ssid);
608 if (selected)
609 break;
610 }
611
612 if (selected == NULL && wpa_s->blacklist) {
613 wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
614 "and try again");
615 wpa_blacklist_clear(wpa_s);
616 } else if (selected == NULL) {
617 break;
618 }
619 }
620
621 if (selected) {
622 /* Do not trigger new association unless the BSSID has changed
623 * or if reassociation is requested. If we are in process of
624 * associating with the selected BSSID, do not trigger new
625 * attempt. */
626 if (wpa_s->reassociate ||
627 (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
628 (wpa_s->wpa_state != WPA_ASSOCIATING ||
629 os_memcmp(selected->bssid, wpa_s->pending_bssid,
630 ETH_ALEN) != 0))) {
631 if (wpa_supplicant_scard_init(wpa_s, ssid)) {
632 wpa_supplicant_req_scan(wpa_s, 10, 0);
633 return;
634 }
635 wpa_supplicant_associate(wpa_s, selected, ssid);
636 } else {
637 wpa_printf(MSG_DEBUG, "Already associated with the "
638 "selected AP.");
639 }
640 rsn_preauth_scan_results(wpa_s->wpa, wpa_s->scan_res);
641 } else {
642 wpa_printf(MSG_DEBUG, "No suitable AP found.");
643 timeout = 5;
644 goto req_scan;
645 }
646
647 return;
648
649req_scan:
650 if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
651 /*
652 * Quick recovery if the initial scan results were not
653 * complete when fetched before the first scan request.
654 */
655 wpa_s->scan_res_tried++;
656 timeout = 0;
657 }
658 wpa_supplicant_req_scan(wpa_s, timeout, 0);
659}
660#endif /* CONFIG_NO_SCAN_PROCESSING */
661
662
663static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
664 union wpa_event_data *data)
665{
666 int l, len, found = 0, wpa_found, rsn_found;
667 u8 *p;
668
669 wpa_printf(MSG_DEBUG, "Association info event");
670 if (data->assoc_info.req_ies)
671 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
672 data->assoc_info.req_ies_len);
673 if (data->assoc_info.resp_ies)
674 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
675 data->assoc_info.resp_ies_len);
676 if (data->assoc_info.beacon_ies)
677 wpa_hexdump(MSG_DEBUG, "beacon_ies",
678 data->assoc_info.beacon_ies,
679 data->assoc_info.beacon_ies_len);
680
681 p = data->assoc_info.req_ies;
682 l = data->assoc_info.req_ies_len;
683
684 /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
685 while (p && l >= 2) {
686 len = p[1] + 2;
687 if (len > l) {
688 wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
689 p, l);
690 break;
691 }
692 if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
693 (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
694 (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
695 if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
696 break;
697 found = 1;
698 wpa_find_assoc_pmkid(wpa_s);
699 break;
700 }
701 l -= len;
702 p += len;
703 }
704 if (!found && data->assoc_info.req_ies)
705 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
706
707 /* WPA/RSN IE from Beacon/ProbeResp */
708 p = data->assoc_info.beacon_ies;
709 l = data->assoc_info.beacon_ies_len;
710
711 /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
712 */
713 wpa_found = rsn_found = 0;
714 while (p && l >= 2) {
715 len = p[1] + 2;
716 if (len > l) {
717 wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
718 p, l);
719 break;
720 }
721 if (!wpa_found &&
722 p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
723 os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
724 wpa_found = 1;
725 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
726 }
727
728 if (!rsn_found &&
729 p[0] == WLAN_EID_RSN && p[1] >= 2) {
730 rsn_found = 1;
731 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
732 }
733
734 l -= len;
735 p += len;
736 }
737
738 if (!wpa_found && data->assoc_info.beacon_ies)
739 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
740 if (!rsn_found && data->assoc_info.beacon_ies)
741 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
742 if (wpa_found || rsn_found)
743 wpa_s->ap_ies_from_associnfo = 1;
744}
745
746
747static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
748 union wpa_event_data *data)
749{
750 u8 bssid[ETH_ALEN];
751 int ft_completed = wpa_ft_is_completed(wpa_s->wpa);
752
753 if (data)
754 wpa_supplicant_event_associnfo(wpa_s, data);
755
756 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
757 if (wpa_s->use_client_mlme)
758 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
759 if (wpa_s->use_client_mlme ||
760 (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
761 os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
762 wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
763 MACSTR, MAC2STR(bssid));
764 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
765 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
766 if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
767 wpa_clear_keys(wpa_s, bssid);
768 }
769 if (wpa_supplicant_select_config(wpa_s) < 0) {
770 wpa_supplicant_disassociate(
771 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
772 return;
773 }
774 }
775
776 wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
777 if (wpa_s->current_ssid) {
778 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
779 * initialized before association, but for other modes,
780 * initialize PC/SC here, if the current configuration needs
781 * smartcard or SIM/USIM. */
782 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
783 }
784 wpa_sm_notify_assoc(wpa_s->wpa, bssid);
785 l2_packet_notify_auth_start(wpa_s->l2);
786
787 /*
788 * Set portEnabled first to FALSE in order to get EAP state machine out
789 * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
790 * state machine may transit to AUTHENTICATING state based on obsolete
791 * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
792 * AUTHENTICATED without ever giving chance to EAP state machine to
793 * reset the state.
794 */
795 if (!ft_completed) {
796 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
797 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
798 }
56586197 799 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
6fc6879b
JM		 800 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
801 /* 802.1X::portControl = Auto */
802 eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
803 wpa_s->eapol_received = 0;
804 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
805 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
806 wpa_supplicant_cancel_auth_timeout(wpa_s);
807 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
808 } else if (!ft_completed) {
809 /* Timeout for receiving the first EAPOL packet */
810 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
811 }
812 wpa_supplicant_cancel_scan(wpa_s);
813
814 if (wpa_s->driver_4way_handshake &&
56586197 815 wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
6fc6879b
JM		 816 /*
817 * We are done; the driver will take care of RSN 4-way
818 * handshake.
819 */
820 wpa_supplicant_cancel_auth_timeout(wpa_s);
821 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
822 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
823 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
824 }
825}
826
827
828static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
829{
830 const u8 *bssid;
831
832 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
833 /*
834 * At least Host AP driver and a Prism3 card seemed to be
835 * generating streams of disconnected events when configuring
836 * IBSS for WPA-None. Ignore them for now.
837 */
838 wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
839 "IBSS/WPA-None mode");
840 return;
841 }
842
843 if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
56586197 844 wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
6fc6879b
JM		 845 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
846 "pre-shared key may be incorrect");
847 }
848 if (wpa_s->wpa_state >= WPA_ASSOCIATED)
849 wpa_supplicant_req_scan(wpa_s, 0, 100000);
850 bssid = wpa_s->bssid;
a8e16edc 851 if (is_zero_ether_addr(bssid))
6fc6879b
JM		 852 bssid = wpa_s->pending_bssid;
853 wpa_blacklist_add(wpa_s, bssid);
854 wpa_sm_notify_disassoc(wpa_s->wpa);
855 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
856 "remove keys");
857 if (wpa_supplicant_dynamic_keys(wpa_s)) {
858 wpa_s->keys_cleared = 0;
859 wpa_clear_keys(wpa_s, wpa_s->bssid);
860 }
861 wpa_supplicant_mark_disassoc(wpa_s);
862}
863
864
46690a3b
JM		 865#ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
866static void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx,
867 void *sock_ctx)
868{
869 struct wpa_supplicant *wpa_s = eloop_ctx;
870
871 if (!wpa_s->pending_mic_error_report)
872 return;
873
874 wpa_printf(MSG_DEBUG, "WPA: Sending pending MIC error report");
875 wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
876 wpa_s->pending_mic_error_report = 0;
877}
878#endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
879
880
6fc6879b
JM		 881static void
882wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
883 union wpa_event_data *data)
884{
885 int pairwise;
886 struct os_time t;
887
888 wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
889 pairwise = (data && data->michael_mic_failure.unicast);
6fc6879b 890 os_get_time(&t);
46690a3b
JM		 891 if ((wpa_s->last_michael_mic_error &&
892 t.sec - wpa_s->last_michael_mic_error <= 60) ||
893 wpa_s->pending_mic_error_report) {
894 if (wpa_s->pending_mic_error_report) {
895 /*
896 * Send the pending MIC error report immediately since
897 * we are going to start countermeasures and AP better
898 * do the same.
899 */
900 wpa_sm_key_request(wpa_s->wpa, 1,
901 wpa_s->pending_mic_error_pairwise);
902 }
903
904 /* Send the new MIC error report immediately since we are going
905 * to start countermeasures and AP better do the same.
906 */
907 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
908
6fc6879b
JM		 909 /* initialize countermeasures */
910 wpa_s->countermeasures = 1;
911 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
912
913 /*
914 * Need to wait for completion of request frame. We do not get
915 * any callback for the message completion, so just wait a
916 * short while and hope for the best. */
917 os_sleep(0, 10000);
918
919 wpa_drv_set_countermeasures(wpa_s, 1);
920 wpa_supplicant_deauthenticate(wpa_s,
921 WLAN_REASON_MICHAEL_MIC_FAILURE);
922 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
923 wpa_s, NULL);
924 eloop_register_timeout(60, 0,
925 wpa_supplicant_stop_countermeasures,
926 wpa_s, NULL);
927 /* TODO: mark the AP rejected for 60 second. STA is
928 * allowed to associate with another AP.. */
46690a3b
JM		 929 } else {
930#ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
931 if (wpa_s->mic_errors_seen) {
932 /*
933 * Reduce the effectiveness of Michael MIC error
934 * reports as a means for attacking against TKIP if
935 * more than one MIC failure is noticed with the same
936 * PTK. We delay the transmission of the reports by a
937 * random time between 0 and 60 seconds in order to
938 * force the attacker wait 60 seconds before getting
939 * the information on whether a frame resulted in a MIC
940 * failure.
941 */
942 u8 rval[4];
943 int sec;
944
945 if (os_get_random(rval, sizeof(rval)) < 0)
946 sec = os_random() % 60;
947 else
948 sec = WPA_GET_BE32(rval) % 60;
949 wpa_printf(MSG_DEBUG, "WPA: Delay MIC error report %d "
950 "seconds", sec);
951 wpa_s->pending_mic_error_report = 1;
952 wpa_s->pending_mic_error_pairwise = pairwise;
953 eloop_cancel_timeout(
954 wpa_supplicant_delayed_mic_error_report,
955 wpa_s, NULL);
956 eloop_register_timeout(
957 sec, os_random() % 1000000,
958 wpa_supplicant_delayed_mic_error_report,
959 wpa_s, NULL);
960 } else {
961 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
962 }
963#else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
964 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
965#endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
6fc6879b
JM		 966 }
967 wpa_s->last_michael_mic_error = t.sec;
46690a3b 968 wpa_s->mic_errors_seen++;
6fc6879b
JM		 969}
970
971
972static void
973wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
974 union wpa_event_data *data)
975{
976 if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
977 return;
978
979 switch (data->interface_status.ievent) {
980 case EVENT_INTERFACE_ADDED:
981 if (!wpa_s->interface_removed)
982 break;
983 wpa_s->interface_removed = 0;
984 wpa_printf(MSG_DEBUG, "Configured interface was added.");
985 if (wpa_supplicant_driver_init(wpa_s) < 0) {
986 wpa_printf(MSG_INFO, "Failed to initialize the driver "
987 "after interface was added.");
988 }
989 break;
990 case EVENT_INTERFACE_REMOVED:
991 wpa_printf(MSG_DEBUG, "Configured interface was removed.");
992 wpa_s->interface_removed = 1;
993 wpa_supplicant_mark_disassoc(wpa_s);
994 l2_packet_deinit(wpa_s->l2);
995 wpa_s->l2 = NULL;
996 break;
997 }
998}
999
1000
1001#ifdef CONFIG_PEERKEY
1002static void
1003wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
1004 union wpa_event_data *data)
1005{
1006 if (data == NULL)
1007 return;
1008 wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
1009}
1010#endif /* CONFIG_PEERKEY */
1011
1012
1013#ifdef CONFIG_IEEE80211R
1014static void
1015wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
1016 union wpa_event_data *data)
1017{
1018 if (data == NULL)
1019 return;
1020
1021 if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
1022 data->ft_ies.ies_len,
1023 data->ft_ies.ft_action,
1024 data->ft_ies.target_ap) < 0) {
1025 /* TODO: prevent MLME/driver from trying to associate? */
1026 }
1027}
1028#endif /* CONFIG_IEEE80211R */
1029
1030
1031void wpa_supplicant_event(void *ctx, wpa_event_type event,
1032 union wpa_event_data *data)
1033{
1034 struct wpa_supplicant *wpa_s = ctx;
1035
1036 switch (event) {
1037 case EVENT_ASSOC:
1038 wpa_supplicant_event_assoc(wpa_s, data);
1039 break;
1040 case EVENT_DISASSOC:
1041 wpa_supplicant_event_disassoc(wpa_s);
1042 break;
1043 case EVENT_MICHAEL_MIC_FAILURE:
1044 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
1045 break;
1046#ifndef CONFIG_NO_SCAN_PROCESSING
1047 case EVENT_SCAN_RESULTS:
1048 wpa_supplicant_event_scan_results(wpa_s);
1049 break;
1050#endif /* CONFIG_NO_SCAN_PROCESSING */
1051 case EVENT_ASSOCINFO:
1052 wpa_supplicant_event_associnfo(wpa_s, data);
1053 break;
1054 case EVENT_INTERFACE_STATUS:
1055 wpa_supplicant_event_interface_status(wpa_s, data);
1056 break;
1057 case EVENT_PMKID_CANDIDATE:
1058 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
1059 break;
1060#ifdef CONFIG_PEERKEY
1061 case EVENT_STKSTART:
1062 wpa_supplicant_event_stkstart(wpa_s, data);
1063 break;
1064#endif /* CONFIG_PEERKEY */
1065#ifdef CONFIG_IEEE80211R
1066 case EVENT_FT_RESPONSE:
1067 wpa_supplicant_event_ft_response(wpa_s, data);
1068 break;
1069#endif /* CONFIG_IEEE80211R */
1070 default:
1071 wpa_printf(MSG_INFO, "Unknown event %d", event);
1072 break;
1073 }
1074}
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