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Re-initialize hostapd/wpa_supplicant git repository based on 0.6.3 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 |
61 WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_FT_IEEE8021X))
62 {
63 u8 wpa_ie[80];
64 size_t wpa_ie_len = sizeof(wpa_ie);
65 wpa_supplicant_set_suites(wpa_s, NULL, ssid,
66 wpa_ie, &wpa_ie_len);
67 } else {
68 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
69 }
70
71 if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
72 eapol_sm_invalidate_cached_session(wpa_s->eapol);
73 wpa_s->current_ssid = ssid;
74 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
75 wpa_supplicant_initiate_eapol(wpa_s);
76
77 return 0;
78}
79
80
81static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
82 void *sock_ctx)
83{
84 struct wpa_supplicant *wpa_s = eloop_ctx;
85
86 if (wpa_s->countermeasures) {
87 wpa_s->countermeasures = 0;
88 wpa_drv_set_countermeasures(wpa_s, 0);
89 wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
90 wpa_supplicant_req_scan(wpa_s, 0, 0);
91 }
92}
93
94
95void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
96{
97 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
98 os_memset(wpa_s->bssid, 0, ETH_ALEN);
99 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
100 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
101 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
102 if (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK ||
103 wpa_s->key_mgmt == WPA_KEY_MGMT_FT_PSK)
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
312 if (!(ie.capabilities & WPA_CAPABILITY_MGMT_FRAME_PROTECTION)
313 && ssid->ieee80211w == IEEE80211W_REQUIRED) {
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 *
368wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group,
369 struct wpa_ssid **selected_ssid)
370{
371 struct wpa_ssid *ssid;
372 struct wpa_scan_res *bss, *selected = NULL;
373 size_t i;
374 struct wpa_blacklist *e;
375 const u8 *ie;
376
377 wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
378 group->priority);
379
380 bss = NULL;
381 ssid = NULL;
382 /* First, try to find WPA-enabled AP */
383 wpa_printf(MSG_DEBUG, "Try to find WPA-enabled AP");
384 for (i = 0; i < wpa_s->scan_res->num && !selected; i++) {
385 const u8 *ssid_;
386 u8 wpa_ie_len, rsn_ie_len, ssid_len;
387 bss = wpa_s->scan_res->res[i];
388
389 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
390 ssid_ = ie ? ie + 2 : (u8 *) "";
391 ssid_len = ie ? ie[1] : 0;
392
393 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
394 wpa_ie_len = ie ? ie[1] : 0;
395
396 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
397 rsn_ie_len = ie ? ie[1] : 0;
398
399 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
400 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
401 (int) i, MAC2STR(bss->bssid),
402 wpa_ssid_txt(ssid_, ssid_len),
403 wpa_ie_len, rsn_ie_len, bss->caps);
404 e = wpa_blacklist_get(wpa_s, bss->bssid);
405 if (e && e->count > 1) {
406 wpa_printf(MSG_DEBUG, " skip - blacklisted");
407 continue;
408 }
409
410 if (wpa_ie_len == 0 && rsn_ie_len == 0) {
411 wpa_printf(MSG_DEBUG, " skip - no WPA/RSN IE");
412 continue;
413 }
414
415 for (ssid = group; ssid; ssid = ssid->pnext) {
416 if (ssid->disabled) {
417 wpa_printf(MSG_DEBUG, " skip - disabled");
418 continue;
419 }
420 if (ssid_len != ssid->ssid_len ||
421 os_memcmp(ssid_, ssid->ssid, ssid_len) != 0) {
422 wpa_printf(MSG_DEBUG, " skip - "
423 "SSID mismatch");
424 continue;
425 }
426 if (ssid->bssid_set &&
427 os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
428 {
429 wpa_printf(MSG_DEBUG, " skip - "
430 "BSSID mismatch");
431 continue;
432 }
433 if (wpa_supplicant_ssid_bss_match(ssid, bss)) {
434 selected = bss;
435 *selected_ssid = ssid;
436 wpa_printf(MSG_DEBUG, " selected WPA AP "
437 MACSTR " ssid='%s'",
438 MAC2STR(bss->bssid),
439 wpa_ssid_txt(ssid_, ssid_len));
440 break;
441 }
442 }
443 }
444
445 /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
446 * allows this. */
447 wpa_printf(MSG_DEBUG, "Try to find non-WPA AP");
448 for (i = 0; i < wpa_s->scan_res->num && !selected; i++) {
449 const u8 *ssid_;
450 u8 wpa_ie_len, rsn_ie_len, ssid_len;
451 bss = wpa_s->scan_res->res[i];
452
453 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
454 ssid_ = ie ? ie + 2 : (u8 *) "";
455 ssid_len = ie ? ie[1] : 0;
456
457 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
458 wpa_ie_len = ie ? ie[1] : 0;
459
460 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
461 rsn_ie_len = ie ? ie[1] : 0;
462
463 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
464 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
465 (int) i, MAC2STR(bss->bssid),
466 wpa_ssid_txt(ssid_, ssid_len),
467 wpa_ie_len, rsn_ie_len, bss->caps);
468 e = wpa_blacklist_get(wpa_s, bss->bssid);
469 if (e && e->count > 1) {
470 wpa_printf(MSG_DEBUG, " skip - blacklisted");
471 continue;
472 }
473 for (ssid = group; ssid; ssid = ssid->pnext) {
474 if (ssid->disabled) {
475 wpa_printf(MSG_DEBUG, " skip - disabled");
476 continue;
477 }
478 if (ssid->ssid_len != 0 &&
479 (ssid_len != ssid->ssid_len ||
480 os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
481 wpa_printf(MSG_DEBUG, " skip - "
482 "SSID mismatch");
483 continue;
484 }
485
486 if (ssid->bssid_set &&
487 os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
488 {
489 wpa_printf(MSG_DEBUG, " skip - "
490 "BSSID mismatch");
491 continue;
492 }
493
494 if (!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
495 !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
496 {
497 wpa_printf(MSG_DEBUG, " skip - "
498 "non-WPA network not allowed");
499 continue;
500 }
501
502 if ((ssid->key_mgmt &
503 (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK)) &&
504 (wpa_ie_len != 0 || rsn_ie_len != 0)) {
505 wpa_printf(MSG_DEBUG, " skip - "
506 "WPA network");
507 continue;
508 }
509
510 if (!wpa_supplicant_match_privacy(bss, ssid)) {
511 wpa_printf(MSG_DEBUG, " skip - "
512 "privacy mismatch");
513 continue;
514 }
515
516 if (bss->caps & IEEE80211_CAP_IBSS) {
517 wpa_printf(MSG_DEBUG, " skip - "
518 "IBSS (adhoc) network");
519 continue;
520 }
521
522 selected = bss;
523 *selected_ssid = ssid;
524 wpa_printf(MSG_DEBUG, " selected non-WPA AP "
525 MACSTR " ssid='%s'",
526 MAC2STR(bss->bssid),
527 wpa_ssid_txt(ssid_, ssid_len));
528 break;
529 }
530 }
531
532 return selected;
533}
534
535
536static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
537{
538 int prio, timeout;
539 struct wpa_scan_res *selected = NULL;
540 struct wpa_ssid *ssid = NULL;
541
542 if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
543 if (wpa_s->conf->ap_scan == 2)
544 return;
545 wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
546 "scanning again");
547 timeout = 1;
548 goto req_scan;
549 }
550
551 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
552
553 wpa_supplicant_dbus_notify_scan_results(wpa_s);
554
555 if (wpa_s->conf->ap_scan == 2 || wpa_s->disconnected)
556 return;
557
558 while (selected == NULL) {
559 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
560 selected = wpa_supplicant_select_bss(
561 wpa_s, wpa_s->conf->pssid[prio], &ssid);
562 if (selected)
563 break;
564 }
565
566 if (selected == NULL && wpa_s->blacklist) {
567 wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
568 "and try again");
569 wpa_blacklist_clear(wpa_s);
570 } else if (selected == NULL) {
571 break;
572 }
573 }
574
575 if (selected) {
576 /* Do not trigger new association unless the BSSID has changed
577 * or if reassociation is requested. If we are in process of
578 * associating with the selected BSSID, do not trigger new
579 * attempt. */
580 if (wpa_s->reassociate ||
581 (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
582 (wpa_s->wpa_state != WPA_ASSOCIATING ||
583 os_memcmp(selected->bssid, wpa_s->pending_bssid,
584 ETH_ALEN) != 0))) {
585 if (wpa_supplicant_scard_init(wpa_s, ssid)) {
586 wpa_supplicant_req_scan(wpa_s, 10, 0);
587 return;
588 }
589 wpa_supplicant_associate(wpa_s, selected, ssid);
590 } else {
591 wpa_printf(MSG_DEBUG, "Already associated with the "
592 "selected AP.");
593 }
594 rsn_preauth_scan_results(wpa_s->wpa, wpa_s->scan_res);
595 } else {
596 wpa_printf(MSG_DEBUG, "No suitable AP found.");
597 timeout = 5;
598 goto req_scan;
599 }
600
601 return;
602
603req_scan:
604 if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
605 /*
606 * Quick recovery if the initial scan results were not
607 * complete when fetched before the first scan request.
608 */
609 wpa_s->scan_res_tried++;
610 timeout = 0;
611 }
612 wpa_supplicant_req_scan(wpa_s, timeout, 0);
613}
614#endif /* CONFIG_NO_SCAN_PROCESSING */
615
616
617static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
618 union wpa_event_data *data)
619{
620 int l, len, found = 0, wpa_found, rsn_found;
621 u8 *p;
622
623 wpa_printf(MSG_DEBUG, "Association info event");
624 if (data->assoc_info.req_ies)
625 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
626 data->assoc_info.req_ies_len);
627 if (data->assoc_info.resp_ies)
628 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
629 data->assoc_info.resp_ies_len);
630 if (data->assoc_info.beacon_ies)
631 wpa_hexdump(MSG_DEBUG, "beacon_ies",
632 data->assoc_info.beacon_ies,
633 data->assoc_info.beacon_ies_len);
634
635 p = data->assoc_info.req_ies;
636 l = data->assoc_info.req_ies_len;
637
638 /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
639 while (p && l >= 2) {
640 len = p[1] + 2;
641 if (len > l) {
642 wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
643 p, l);
644 break;
645 }
646 if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
647 (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
648 (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
649 if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
650 break;
651 found = 1;
652 wpa_find_assoc_pmkid(wpa_s);
653 break;
654 }
655 l -= len;
656 p += len;
657 }
658 if (!found && data->assoc_info.req_ies)
659 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
660
661 /* WPA/RSN IE from Beacon/ProbeResp */
662 p = data->assoc_info.beacon_ies;
663 l = data->assoc_info.beacon_ies_len;
664
665 /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
666 */
667 wpa_found = rsn_found = 0;
668 while (p && l >= 2) {
669 len = p[1] + 2;
670 if (len > l) {
671 wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
672 p, l);
673 break;
674 }
675 if (!wpa_found &&
676 p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
677 os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
678 wpa_found = 1;
679 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
680 }
681
682 if (!rsn_found &&
683 p[0] == WLAN_EID_RSN && p[1] >= 2) {
684 rsn_found = 1;
685 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
686 }
687
688 l -= len;
689 p += len;
690 }
691
692 if (!wpa_found && data->assoc_info.beacon_ies)
693 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
694 if (!rsn_found && data->assoc_info.beacon_ies)
695 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
696 if (wpa_found || rsn_found)
697 wpa_s->ap_ies_from_associnfo = 1;
698}
699
700
701static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
702 union wpa_event_data *data)
703{
704 u8 bssid[ETH_ALEN];
705 int ft_completed = wpa_ft_is_completed(wpa_s->wpa);
706
707 if (data)
708 wpa_supplicant_event_associnfo(wpa_s, data);
709
710 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
711 if (wpa_s->use_client_mlme)
712 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
713 if (wpa_s->use_client_mlme ||
714 (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
715 os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
716 wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
717 MACSTR, MAC2STR(bssid));
718 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
719 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
720 if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
721 wpa_clear_keys(wpa_s, bssid);
722 }
723 if (wpa_supplicant_select_config(wpa_s) < 0) {
724 wpa_supplicant_disassociate(
725 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
726 return;
727 }
728 }
729
730 wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
731 if (wpa_s->current_ssid) {
732 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
733 * initialized before association, but for other modes,
734 * initialize PC/SC here, if the current configuration needs
735 * smartcard or SIM/USIM. */
736 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
737 }
738 wpa_sm_notify_assoc(wpa_s->wpa, bssid);
739 l2_packet_notify_auth_start(wpa_s->l2);
740
741 /*
742 * Set portEnabled first to FALSE in order to get EAP state machine out
743 * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
744 * state machine may transit to AUTHENTICATING state based on obsolete
745 * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
746 * AUTHENTICATED without ever giving chance to EAP state machine to
747 * reset the state.
748 */
749 if (!ft_completed) {
750 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
751 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
752 }
753 if (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK ||
754 wpa_s->key_mgmt == WPA_KEY_MGMT_FT_PSK || ft_completed)
755 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
756 /* 802.1X::portControl = Auto */
757 eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
758 wpa_s->eapol_received = 0;
759 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
760 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
761 wpa_supplicant_cancel_auth_timeout(wpa_s);
762 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
763 } else if (!ft_completed) {
764 /* Timeout for receiving the first EAPOL packet */
765 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
766 }
767 wpa_supplicant_cancel_scan(wpa_s);
768
769 if (wpa_s->driver_4way_handshake &&
770 (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK ||
771 wpa_s->key_mgmt == WPA_KEY_MGMT_FT_PSK)) {
772 /*
773 * We are done; the driver will take care of RSN 4-way
774 * handshake.
775 */
776 wpa_supplicant_cancel_auth_timeout(wpa_s);
777 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
778 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
779 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
780 }
781}
782
783
784static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
785{
786 const u8 *bssid;
787
788 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
789 /*
790 * At least Host AP driver and a Prism3 card seemed to be
791 * generating streams of disconnected events when configuring
792 * IBSS for WPA-None. Ignore them for now.
793 */
794 wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
795 "IBSS/WPA-None mode");
796 return;
797 }
798
799 if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
800 (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK ||
801 wpa_s->key_mgmt == WPA_KEY_MGMT_FT_PSK)) {
802 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
803 "pre-shared key may be incorrect");
804 }
805 if (wpa_s->wpa_state >= WPA_ASSOCIATED)
806 wpa_supplicant_req_scan(wpa_s, 0, 100000);
807 bssid = wpa_s->bssid;
808 if (os_memcmp(bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) == 0)
809 bssid = wpa_s->pending_bssid;
810 wpa_blacklist_add(wpa_s, bssid);
811 wpa_sm_notify_disassoc(wpa_s->wpa);
812 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
813 "remove keys");
814 if (wpa_supplicant_dynamic_keys(wpa_s)) {
815 wpa_s->keys_cleared = 0;
816 wpa_clear_keys(wpa_s, wpa_s->bssid);
817 }
818 wpa_supplicant_mark_disassoc(wpa_s);
819}
820
821
822static void
823wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
824 union wpa_event_data *data)
825{
826 int pairwise;
827 struct os_time t;
828
829 wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
830 pairwise = (data && data->michael_mic_failure.unicast);
831 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
832 os_get_time(&t);
833 if (wpa_s->last_michael_mic_error &&
834 t.sec - wpa_s->last_michael_mic_error <= 60) {
835 /* initialize countermeasures */
836 wpa_s->countermeasures = 1;
837 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
838
839 /*
840 * Need to wait for completion of request frame. We do not get
841 * any callback for the message completion, so just wait a
842 * short while and hope for the best. */
843 os_sleep(0, 10000);
844
845 wpa_drv_set_countermeasures(wpa_s, 1);
846 wpa_supplicant_deauthenticate(wpa_s,
847 WLAN_REASON_MICHAEL_MIC_FAILURE);
848 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
849 wpa_s, NULL);
850 eloop_register_timeout(60, 0,
851 wpa_supplicant_stop_countermeasures,
852 wpa_s, NULL);
853 /* TODO: mark the AP rejected for 60 second. STA is
854 * allowed to associate with another AP.. */
855 }
856 wpa_s->last_michael_mic_error = t.sec;
857}
858
859
860static void
861wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
862 union wpa_event_data *data)
863{
864 if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
865 return;
866
867 switch (data->interface_status.ievent) {
868 case EVENT_INTERFACE_ADDED:
869 if (!wpa_s->interface_removed)
870 break;
871 wpa_s->interface_removed = 0;
872 wpa_printf(MSG_DEBUG, "Configured interface was added.");
873 if (wpa_supplicant_driver_init(wpa_s) < 0) {
874 wpa_printf(MSG_INFO, "Failed to initialize the driver "
875 "after interface was added.");
876 }
877 break;
878 case EVENT_INTERFACE_REMOVED:
879 wpa_printf(MSG_DEBUG, "Configured interface was removed.");
880 wpa_s->interface_removed = 1;
881 wpa_supplicant_mark_disassoc(wpa_s);
882 l2_packet_deinit(wpa_s->l2);
883 wpa_s->l2 = NULL;
884 break;
885 }
886}
887
888
889#ifdef CONFIG_PEERKEY
890static void
891wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
892 union wpa_event_data *data)
893{
894 if (data == NULL)
895 return;
896 wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
897}
898#endif /* CONFIG_PEERKEY */
899
900
901#ifdef CONFIG_IEEE80211R
902static void
903wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
904 union wpa_event_data *data)
905{
906 if (data == NULL)
907 return;
908
909 if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
910 data->ft_ies.ies_len,
911 data->ft_ies.ft_action,
912 data->ft_ies.target_ap) < 0) {
913 /* TODO: prevent MLME/driver from trying to associate? */
914 }
915}
916#endif /* CONFIG_IEEE80211R */
917
918
919void wpa_supplicant_event(void *ctx, wpa_event_type event,
920 union wpa_event_data *data)
921{
922 struct wpa_supplicant *wpa_s = ctx;
923
924 switch (event) {
925 case EVENT_ASSOC:
926 wpa_supplicant_event_assoc(wpa_s, data);
927 break;
928 case EVENT_DISASSOC:
929 wpa_supplicant_event_disassoc(wpa_s);
930 break;
931 case EVENT_MICHAEL_MIC_FAILURE:
932 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
933 break;
934#ifndef CONFIG_NO_SCAN_PROCESSING
935 case EVENT_SCAN_RESULTS:
936 wpa_supplicant_event_scan_results(wpa_s);
937 break;
938#endif /* CONFIG_NO_SCAN_PROCESSING */
939 case EVENT_ASSOCINFO:
940 wpa_supplicant_event_associnfo(wpa_s, data);
941 break;
942 case EVENT_INTERFACE_STATUS:
943 wpa_supplicant_event_interface_status(wpa_s, data);
944 break;
945 case EVENT_PMKID_CANDIDATE:
946 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
947 break;
948#ifdef CONFIG_PEERKEY
949 case EVENT_STKSTART:
950 wpa_supplicant_event_stkstart(wpa_s, data);
951 break;
952#endif /* CONFIG_PEERKEY */
953#ifdef CONFIG_IEEE80211R
954 case EVENT_FT_RESPONSE:
955 wpa_supplicant_event_ft_response(wpa_s, data);
956 break;
957#endif /* CONFIG_IEEE80211R */
958 default:
959 wpa_printf(MSG_INFO, "Unknown event %d", event);
960 break;
961 }
962}
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