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[thirdparty/hostap.git] / wpa_supplicant / events.c
1 /*
2 * WPA Supplicant - Driver event processing
3 * Copyright (c) 2003-2011, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15 #include "includes.h"
16
17 #include "common.h"
18 #include "eapol_supp/eapol_supp_sm.h"
19 #include "rsn_supp/wpa.h"
20 #include "eloop.h"
21 #include "config.h"
22 #include "l2_packet/l2_packet.h"
23 #include "wpa_supplicant_i.h"
24 #include "driver_i.h"
25 #include "pcsc_funcs.h"
26 #include "rsn_supp/preauth.h"
27 #include "rsn_supp/pmksa_cache.h"
28 #include "common/wpa_ctrl.h"
29 #include "eap_peer/eap.h"
30 #include "ap/hostapd.h"
31 #include "p2p/p2p.h"
32 #include "notify.h"
33 #include "common/ieee802_11_defs.h"
34 #include "common/ieee802_11_common.h"
35 #include "crypto/random.h"
36 #include "blacklist.h"
37 #include "wpas_glue.h"
38 #include "wps_supplicant.h"
39 #include "ibss_rsn.h"
40 #include "sme.h"
41 #include "p2p_supplicant.h"
42 #include "bgscan.h"
43 #include "ap.h"
44 #include "bss.h"
45 #include "mlme.h"
46 #include "scan.h"
47
48
49 static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
50 {
51 struct wpa_ssid *ssid, *old_ssid;
52
53 if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
54 return 0;
55
56 wpa_dbg(wpa_s, MSG_DEBUG, "Select network based on association "
57 "information");
58 ssid = wpa_supplicant_get_ssid(wpa_s);
59 if (ssid == NULL) {
60 wpa_msg(wpa_s, MSG_INFO,
61 "No network configuration found for the current AP");
62 return -1;
63 }
64
65 if (ssid->disabled) {
66 wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is disabled");
67 return -1;
68 }
69
70 wpa_dbg(wpa_s, MSG_DEBUG, "Network configuration found for the "
71 "current AP");
72 if (ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
73 WPA_KEY_MGMT_WPA_NONE |
74 WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_FT_IEEE8021X |
75 WPA_KEY_MGMT_PSK_SHA256 |
76 WPA_KEY_MGMT_IEEE8021X_SHA256)) {
77 u8 wpa_ie[80];
78 size_t wpa_ie_len = sizeof(wpa_ie);
79 wpa_supplicant_set_suites(wpa_s, NULL, ssid,
80 wpa_ie, &wpa_ie_len);
81 } else {
82 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
83 }
84
85 if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
86 eapol_sm_invalidate_cached_session(wpa_s->eapol);
87 old_ssid = wpa_s->current_ssid;
88 wpa_s->current_ssid = ssid;
89 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
90 wpa_supplicant_initiate_eapol(wpa_s);
91 if (old_ssid != wpa_s->current_ssid)
92 wpas_notify_network_changed(wpa_s);
93
94 return 0;
95 }
96
97
98 static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
99 void *sock_ctx)
100 {
101 struct wpa_supplicant *wpa_s = eloop_ctx;
102
103 if (wpa_s->countermeasures) {
104 wpa_s->countermeasures = 0;
105 wpa_drv_set_countermeasures(wpa_s, 0);
106 wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
107 wpa_supplicant_req_scan(wpa_s, 0, 0);
108 }
109 }
110
111
112 void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
113 {
114 int bssid_changed;
115
116 #ifdef CONFIG_IBSS_RSN
117 ibss_rsn_deinit(wpa_s->ibss_rsn);
118 wpa_s->ibss_rsn = NULL;
119 #endif /* CONFIG_IBSS_RSN */
120
121 #ifdef CONFIG_AP
122 wpa_supplicant_ap_deinit(wpa_s);
123 #endif /* CONFIG_AP */
124
125 if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED)
126 return;
127
128 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
129 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
130 os_memset(wpa_s->bssid, 0, ETH_ALEN);
131 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
132 wpa_s->current_bss = NULL;
133 wpa_s->assoc_freq = 0;
134 #ifdef CONFIG_IEEE80211R
135 #ifdef CONFIG_SME
136 if (wpa_s->sme.ft_ies)
137 sme_update_ft_ies(wpa_s, NULL, NULL, 0);
138 #endif /* CONFIG_SME */
139 #endif /* CONFIG_IEEE80211R */
140
141 if (bssid_changed)
142 wpas_notify_bssid_changed(wpa_s);
143
144 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
145 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
146 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
147 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
148 wpa_s->ap_ies_from_associnfo = 0;
149 }
150
151
152 static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
153 {
154 struct wpa_ie_data ie;
155 int pmksa_set = -1;
156 size_t i;
157
158 if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
159 ie.pmkid == NULL)
160 return;
161
162 for (i = 0; i < ie.num_pmkid; i++) {
163 pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
164 ie.pmkid + i * PMKID_LEN,
165 NULL, NULL, 0);
166 if (pmksa_set == 0) {
167 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
168 break;
169 }
170 }
171
172 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from "
173 "PMKSA cache", pmksa_set == 0 ? "" : "not ");
174 }
175
176
177 static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
178 union wpa_event_data *data)
179 {
180 if (data == NULL) {
181 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: No data in PMKID candidate "
182 "event");
183 return;
184 }
185 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
186 " index=%d preauth=%d",
187 MAC2STR(data->pmkid_candidate.bssid),
188 data->pmkid_candidate.index,
189 data->pmkid_candidate.preauth);
190
191 pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
192 data->pmkid_candidate.index,
193 data->pmkid_candidate.preauth);
194 }
195
196
197 static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
198 {
199 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
200 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
201 return 0;
202
203 #ifdef IEEE8021X_EAPOL
204 if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
205 wpa_s->current_ssid &&
206 !(wpa_s->current_ssid->eapol_flags &
207 (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
208 EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
209 /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
210 * plaintext or static WEP keys). */
211 return 0;
212 }
213 #endif /* IEEE8021X_EAPOL */
214
215 return 1;
216 }
217
218
219 /**
220 * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
221 * @wpa_s: pointer to wpa_supplicant data
222 * @ssid: Configuration data for the network
223 * Returns: 0 on success, -1 on failure
224 *
225 * This function is called when starting authentication with a network that is
226 * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
227 */
228 int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
229 struct wpa_ssid *ssid)
230 {
231 #ifdef IEEE8021X_EAPOL
232 int aka = 0, sim = 0, type;
233
234 if (ssid->eap.pcsc == NULL || wpa_s->scard != NULL)
235 return 0;
236
237 if (ssid->eap.eap_methods == NULL) {
238 sim = 1;
239 aka = 1;
240 } else {
241 struct eap_method_type *eap = ssid->eap.eap_methods;
242 while (eap->vendor != EAP_VENDOR_IETF ||
243 eap->method != EAP_TYPE_NONE) {
244 if (eap->vendor == EAP_VENDOR_IETF) {
245 if (eap->method == EAP_TYPE_SIM)
246 sim = 1;
247 else if (eap->method == EAP_TYPE_AKA)
248 aka = 1;
249 }
250 eap++;
251 }
252 }
253
254 if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
255 sim = 0;
256 if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL)
257 aka = 0;
258
259 if (!sim && !aka) {
260 wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is configured to "
261 "use SIM, but neither EAP-SIM nor EAP-AKA are "
262 "enabled");
263 return 0;
264 }
265
266 wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is configured to use SIM "
267 "(sim=%d aka=%d) - initialize PCSC", sim, aka);
268 if (sim && aka)
269 type = SCARD_TRY_BOTH;
270 else if (aka)
271 type = SCARD_USIM_ONLY;
272 else
273 type = SCARD_GSM_SIM_ONLY;
274
275 wpa_s->scard = scard_init(type);
276 if (wpa_s->scard == NULL) {
277 wpa_msg(wpa_s, MSG_WARNING, "Failed to initialize SIM "
278 "(pcsc-lite)");
279 return -1;
280 }
281 wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
282 eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
283 #endif /* IEEE8021X_EAPOL */
284
285 return 0;
286 }
287
288
289 #ifndef CONFIG_NO_SCAN_PROCESSING
290 static int wpa_supplicant_match_privacy(struct wpa_scan_res *bss,
291 struct wpa_ssid *ssid)
292 {
293 int i, privacy = 0;
294
295 if (ssid->mixed_cell)
296 return 1;
297
298 #ifdef CONFIG_WPS
299 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
300 return 1;
301 #endif /* CONFIG_WPS */
302
303 for (i = 0; i < NUM_WEP_KEYS; i++) {
304 if (ssid->wep_key_len[i]) {
305 privacy = 1;
306 break;
307 }
308 }
309 #ifdef IEEE8021X_EAPOL
310 if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
311 ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
312 EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
313 privacy = 1;
314 #endif /* IEEE8021X_EAPOL */
315
316 if (wpa_key_mgmt_wpa(ssid->key_mgmt))
317 privacy = 1;
318
319 if (bss->caps & IEEE80211_CAP_PRIVACY)
320 return privacy;
321 return !privacy;
322 }
323
324
325 static int wpa_supplicant_ssid_bss_match(struct wpa_supplicant *wpa_s,
326 struct wpa_ssid *ssid,
327 struct wpa_scan_res *bss)
328 {
329 struct wpa_ie_data ie;
330 int proto_match = 0;
331 const u8 *rsn_ie, *wpa_ie;
332 int ret;
333 int wep_ok;
334
335 ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss);
336 if (ret >= 0)
337 return ret;
338
339 /* Allow TSN if local configuration accepts WEP use without WPA/WPA2 */
340 wep_ok = !wpa_key_mgmt_wpa(ssid->key_mgmt) &&
341 (((ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
342 ssid->wep_key_len[ssid->wep_tx_keyidx] > 0) ||
343 (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA));
344
345 rsn_ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
346 while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
347 proto_match++;
348
349 if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
350 wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - parse "
351 "failed");
352 break;
353 }
354
355 if (wep_ok &&
356 (ie.group_cipher & (WPA_CIPHER_WEP40 | WPA_CIPHER_WEP104)))
357 {
358 wpa_dbg(wpa_s, MSG_DEBUG, " selected based on TSN "
359 "in RSN IE");
360 return 1;
361 }
362
363 if (!(ie.proto & ssid->proto)) {
364 wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - proto "
365 "mismatch");
366 break;
367 }
368
369 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
370 wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - PTK "
371 "cipher mismatch");
372 break;
373 }
374
375 if (!(ie.group_cipher & ssid->group_cipher)) {
376 wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - GTK "
377 "cipher mismatch");
378 break;
379 }
380
381 if (!(ie.key_mgmt & ssid->key_mgmt)) {
382 wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - key mgmt "
383 "mismatch");
384 break;
385 }
386
387 #ifdef CONFIG_IEEE80211W
388 if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
389 ssid->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) {
390 wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - no mgmt "
391 "frame protection");
392 break;
393 }
394 #endif /* CONFIG_IEEE80211W */
395
396 wpa_dbg(wpa_s, MSG_DEBUG, " selected based on RSN IE");
397 return 1;
398 }
399
400 wpa_ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
401 while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
402 proto_match++;
403
404 if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) {
405 wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - parse "
406 "failed");
407 break;
408 }
409
410 if (wep_ok &&
411 (ie.group_cipher & (WPA_CIPHER_WEP40 | WPA_CIPHER_WEP104)))
412 {
413 wpa_dbg(wpa_s, MSG_DEBUG, " selected based on TSN "
414 "in WPA IE");
415 return 1;
416 }
417
418 if (!(ie.proto & ssid->proto)) {
419 wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - proto "
420 "mismatch");
421 break;
422 }
423
424 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
425 wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - PTK "
426 "cipher mismatch");
427 break;
428 }
429
430 if (!(ie.group_cipher & ssid->group_cipher)) {
431 wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - GTK "
432 "cipher mismatch");
433 break;
434 }
435
436 if (!(ie.key_mgmt & ssid->key_mgmt)) {
437 wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - key mgmt "
438 "mismatch");
439 break;
440 }
441
442 wpa_dbg(wpa_s, MSG_DEBUG, " selected based on WPA IE");
443 return 1;
444 }
445
446 if ((ssid->proto & (WPA_PROTO_WPA | WPA_PROTO_RSN)) &&
447 wpa_key_mgmt_wpa(ssid->key_mgmt) && proto_match == 0) {
448 wpa_dbg(wpa_s, MSG_DEBUG, " skip - no WPA/RSN proto match");
449 return 0;
450 }
451
452 if (!wpa_key_mgmt_wpa(ssid->key_mgmt)) {
453 wpa_dbg(wpa_s, MSG_DEBUG, " allow in non-WPA/WPA2");
454 return 1;
455 }
456
457 wpa_dbg(wpa_s, MSG_DEBUG, " reject due to mismatch with "
458 "WPA/WPA2");
459
460 return 0;
461 }
462
463
464 static int freq_allowed(int *freqs, int freq)
465 {
466 int i;
467
468 if (freqs == NULL)
469 return 1;
470
471 for (i = 0; freqs[i]; i++)
472 if (freqs[i] == freq)
473 return 1;
474 return 0;
475 }
476
477
478 static struct wpa_ssid * wpa_scan_res_match(struct wpa_supplicant *wpa_s,
479 int i, struct wpa_scan_res *bss,
480 struct wpa_ssid *group)
481 {
482 const u8 *ssid_;
483 u8 wpa_ie_len, rsn_ie_len, ssid_len;
484 int wpa;
485 struct wpa_blacklist *e;
486 const u8 *ie;
487 struct wpa_ssid *ssid;
488
489 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
490 ssid_ = ie ? ie + 2 : (u8 *) "";
491 ssid_len = ie ? ie[1] : 0;
492
493 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
494 wpa_ie_len = ie ? ie[1] : 0;
495
496 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
497 rsn_ie_len = ie ? ie[1] : 0;
498
499 wpa_dbg(wpa_s, MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
500 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x level=%d%s",
501 i, MAC2STR(bss->bssid), wpa_ssid_txt(ssid_, ssid_len),
502 wpa_ie_len, rsn_ie_len, bss->caps, bss->level,
503 wpa_scan_get_vendor_ie(bss, WPS_IE_VENDOR_TYPE) ? " wps" : "");
504
505 e = wpa_blacklist_get(wpa_s, bss->bssid);
506 if (e) {
507 int limit = 1;
508 if (wpa_supplicant_enabled_networks(wpa_s->conf) == 1) {
509 /*
510 * When only a single network is enabled, we can
511 * trigger blacklisting on the first failure. This
512 * should not be done with multiple enabled networks to
513 * avoid getting forced to move into a worse ESS on
514 * single error if there are no other BSSes of the
515 * current ESS.
516 */
517 limit = 0;
518 }
519 if (e->count > limit) {
520 wpa_dbg(wpa_s, MSG_DEBUG, " skip - blacklisted "
521 "(count=%d limit=%d)", e->count, limit);
522 return NULL;
523 }
524 }
525
526 if (ssid_len == 0) {
527 wpa_dbg(wpa_s, MSG_DEBUG, " skip - SSID not known");
528 return NULL;
529 }
530
531 wpa = wpa_ie_len > 0 || rsn_ie_len > 0;
532
533 for (ssid = group; ssid; ssid = ssid->pnext) {
534 int check_ssid = wpa ? 1 : (ssid->ssid_len != 0);
535
536 if (ssid->disabled) {
537 wpa_dbg(wpa_s, MSG_DEBUG, " skip - disabled");
538 continue;
539 }
540
541 #ifdef CONFIG_WPS
542 if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && e && e->count > 0) {
543 wpa_dbg(wpa_s, MSG_DEBUG, " skip - blacklisted "
544 "(WPS)");
545 continue;
546 }
547
548 if (wpa && ssid->ssid_len == 0 &&
549 wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
550 check_ssid = 0;
551
552 if (!wpa && (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
553 /* Only allow wildcard SSID match if an AP
554 * advertises active WPS operation that matches
555 * with our mode. */
556 check_ssid = 1;
557 if (ssid->ssid_len == 0 &&
558 wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
559 check_ssid = 0;
560 }
561 #endif /* CONFIG_WPS */
562
563 if (check_ssid &&
564 (ssid_len != ssid->ssid_len ||
565 os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
566 wpa_dbg(wpa_s, MSG_DEBUG, " skip - SSID mismatch");
567 continue;
568 }
569
570 if (ssid->bssid_set &&
571 os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0) {
572 wpa_dbg(wpa_s, MSG_DEBUG, " skip - BSSID mismatch");
573 continue;
574 }
575
576 if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
577 continue;
578
579 if (!wpa &&
580 !(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
581 !(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
582 !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)) {
583 wpa_dbg(wpa_s, MSG_DEBUG, " skip - non-WPA network "
584 "not allowed");
585 continue;
586 }
587
588 if (!wpa_supplicant_match_privacy(bss, ssid)) {
589 wpa_dbg(wpa_s, MSG_DEBUG, " skip - privacy "
590 "mismatch");
591 continue;
592 }
593
594 if (bss->caps & IEEE80211_CAP_IBSS) {
595 wpa_dbg(wpa_s, MSG_DEBUG, " skip - IBSS (adhoc) "
596 "network");
597 continue;
598 }
599
600 if (!freq_allowed(ssid->freq_list, bss->freq)) {
601 wpa_dbg(wpa_s, MSG_DEBUG, " skip - frequency not "
602 "allowed");
603 continue;
604 }
605
606 #ifdef CONFIG_P2P
607 /*
608 * TODO: skip the AP if its P2P IE has Group Formation
609 * bit set in the P2P Group Capability Bitmap and we
610 * are not in Group Formation with that device.
611 */
612 #endif /* CONFIG_P2P */
613
614 /* Matching configuration found */
615 return ssid;
616 }
617
618 /* No matching configuration found */
619 return NULL;
620 }
621
622
623 static struct wpa_bss *
624 wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s,
625 struct wpa_scan_results *scan_res,
626 struct wpa_ssid *group,
627 struct wpa_ssid **selected_ssid)
628 {
629 size_t i;
630
631 wpa_dbg(wpa_s, MSG_DEBUG, "Selecting BSS from priority group %d",
632 group->priority);
633
634 for (i = 0; i < scan_res->num; i++) {
635 struct wpa_scan_res *bss = scan_res->res[i];
636 const u8 *ie, *ssid;
637 u8 ssid_len;
638
639 *selected_ssid = wpa_scan_res_match(wpa_s, i, bss, group);
640 if (!*selected_ssid)
641 continue;
642
643 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
644 ssid = ie ? ie + 2 : (u8 *) "";
645 ssid_len = ie ? ie[1] : 0;
646
647 wpa_dbg(wpa_s, MSG_DEBUG, " selected BSS " MACSTR
648 " ssid='%s'",
649 MAC2STR(bss->bssid), wpa_ssid_txt(ssid, ssid_len));
650 return wpa_bss_get(wpa_s, bss->bssid, ssid, ssid_len);
651 }
652
653 return NULL;
654 }
655
656
657 static struct wpa_bss *
658 wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,
659 struct wpa_scan_results *scan_res,
660 struct wpa_ssid **selected_ssid)
661 {
662 struct wpa_bss *selected = NULL;
663 int prio;
664
665 while (selected == NULL) {
666 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
667 selected = wpa_supplicant_select_bss(
668 wpa_s, scan_res, wpa_s->conf->pssid[prio],
669 selected_ssid);
670 if (selected)
671 break;
672 }
673
674 if (selected == NULL && wpa_s->blacklist) {
675 wpa_dbg(wpa_s, MSG_DEBUG, "No APs found - clear "
676 "blacklist and try again");
677 wpa_blacklist_clear(wpa_s);
678 wpa_s->blacklist_cleared++;
679 } else if (selected == NULL)
680 break;
681 }
682
683 return selected;
684 }
685
686
687 static void wpa_supplicant_req_new_scan(struct wpa_supplicant *wpa_s,
688 int timeout_sec, int timeout_usec)
689 {
690 if (!wpa_supplicant_enabled_networks(wpa_s->conf)) {
691 /*
692 * No networks are enabled; short-circuit request so
693 * we don't wait timeout seconds before transitioning
694 * to INACTIVE state.
695 */
696 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
697 return;
698 }
699 wpa_supplicant_req_scan(wpa_s, timeout_sec, timeout_usec);
700 }
701
702
703 void wpa_supplicant_connect(struct wpa_supplicant *wpa_s,
704 struct wpa_bss *selected,
705 struct wpa_ssid *ssid)
706 {
707 if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
708 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
709 "PBC session overlap");
710 #ifdef CONFIG_P2P
711 if (wpas_p2p_notif_pbc_overlap(wpa_s) == 1)
712 return;
713 #endif /* CONFIG_P2P */
714
715 #ifdef CONFIG_WPS
716 wpas_wps_cancel(wpa_s);
717 #endif /* CONFIG_WPS */
718 return;
719 }
720
721 /*
722 * Do not trigger new association unless the BSSID has changed or if
723 * reassociation is requested. If we are in process of associating with
724 * the selected BSSID, do not trigger new attempt.
725 */
726 if (wpa_s->reassociate ||
727 (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
728 ((wpa_s->wpa_state != WPA_ASSOCIATING &&
729 wpa_s->wpa_state != WPA_AUTHENTICATING) ||
730 os_memcmp(selected->bssid, wpa_s->pending_bssid, ETH_ALEN) !=
731 0))) {
732 if (wpa_supplicant_scard_init(wpa_s, ssid)) {
733 wpa_supplicant_req_new_scan(wpa_s, 10, 0);
734 return;
735 }
736 wpa_msg(wpa_s, MSG_DEBUG, "Request association: "
737 "reassociate: %d selected: "MACSTR " bssid: " MACSTR
738 " pending: " MACSTR " wpa_state: %s",
739 wpa_s->reassociate, MAC2STR(selected->bssid),
740 MAC2STR(wpa_s->bssid), MAC2STR(wpa_s->pending_bssid),
741 wpa_supplicant_state_txt(wpa_s->wpa_state));
742 wpa_supplicant_associate(wpa_s, selected, ssid);
743 } else {
744 wpa_dbg(wpa_s, MSG_DEBUG, "Already associated with the "
745 "selected AP");
746 }
747 }
748
749
750 static struct wpa_ssid *
751 wpa_supplicant_pick_new_network(struct wpa_supplicant *wpa_s)
752 {
753 int prio;
754 struct wpa_ssid *ssid;
755
756 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
757 for (ssid = wpa_s->conf->pssid[prio]; ssid; ssid = ssid->pnext)
758 {
759 if (ssid->disabled)
760 continue;
761 if (ssid->mode == IEEE80211_MODE_IBSS ||
762 ssid->mode == IEEE80211_MODE_AP)
763 return ssid;
764 }
765 }
766 return NULL;
767 }
768
769
770 /* TODO: move the rsn_preauth_scan_result*() to be called from notify.c based
771 * on BSS added and BSS changed events */
772 static void wpa_supplicant_rsn_preauth_scan_results(
773 struct wpa_supplicant *wpa_s)
774 {
775 struct wpa_bss *bss;
776
777 if (rsn_preauth_scan_results(wpa_s->wpa) < 0)
778 return;
779
780 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
781 const u8 *ssid, *rsn;
782
783 ssid = wpa_bss_get_ie(bss, WLAN_EID_SSID);
784 if (ssid == NULL)
785 continue;
786
787 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
788 if (rsn == NULL)
789 continue;
790
791 rsn_preauth_scan_result(wpa_s->wpa, bss->bssid, ssid, rsn);
792 }
793
794 }
795
796
797 static int wpa_supplicant_need_to_roam(struct wpa_supplicant *wpa_s,
798 struct wpa_bss *selected,
799 struct wpa_ssid *ssid,
800 struct wpa_scan_results *scan_res)
801 {
802 size_t i;
803 struct wpa_scan_res *current_bss = NULL;
804 int min_diff;
805
806 if (wpa_s->reassociate)
807 return 1; /* explicit request to reassociate */
808 if (wpa_s->wpa_state < WPA_ASSOCIATED)
809 return 1; /* we are not associated; continue */
810 if (wpa_s->current_ssid == NULL)
811 return 1; /* unknown current SSID */
812 if (wpa_s->current_ssid != ssid)
813 return 1; /* different network block */
814
815 for (i = 0; i < scan_res->num; i++) {
816 struct wpa_scan_res *res = scan_res->res[i];
817 const u8 *ie;
818 if (os_memcmp(res->bssid, wpa_s->bssid, ETH_ALEN) != 0)
819 continue;
820
821 ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
822 if (ie == NULL)
823 continue;
824 if (ie[1] != wpa_s->current_ssid->ssid_len ||
825 os_memcmp(ie + 2, wpa_s->current_ssid->ssid, ie[1]) != 0)
826 continue;
827 current_bss = res;
828 break;
829 }
830
831 if (!current_bss)
832 return 1; /* current BSS not seen in scan results */
833
834 wpa_dbg(wpa_s, MSG_DEBUG, "Considering within-ESS reassociation");
835 wpa_dbg(wpa_s, MSG_DEBUG, "Current BSS: " MACSTR " level=%d",
836 MAC2STR(current_bss->bssid), current_bss->level);
837 wpa_dbg(wpa_s, MSG_DEBUG, "Selected BSS: " MACSTR " level=%d",
838 MAC2STR(selected->bssid), selected->level);
839
840 if (wpa_s->current_ssid->bssid_set &&
841 os_memcmp(selected->bssid, wpa_s->current_ssid->bssid, ETH_ALEN) ==
842 0) {
843 wpa_dbg(wpa_s, MSG_DEBUG, "Allow reassociation - selected BSS "
844 "has preferred BSSID");
845 return 1;
846 }
847
848 min_diff = 2;
849 if (current_bss->level < 0) {
850 if (current_bss->level < -85)
851 min_diff = 1;
852 else if (current_bss->level < -80)
853 min_diff = 2;
854 else if (current_bss->level < -75)
855 min_diff = 3;
856 else if (current_bss->level < -70)
857 min_diff = 4;
858 else
859 min_diff = 5;
860 }
861 if (abs(current_bss->level - selected->level) < min_diff) {
862 wpa_dbg(wpa_s, MSG_DEBUG, "Skip roam - too small difference "
863 "in signal level");
864 return 0;
865 }
866
867 return 1;
868 }
869
870 /* Return < 0 if no scan results could be fetched. */
871 static int _wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
872 union wpa_event_data *data)
873 {
874 struct wpa_bss *selected;
875 struct wpa_ssid *ssid = NULL;
876 struct wpa_scan_results *scan_res;
877 int ap = 0;
878
879 #ifdef CONFIG_AP
880 if (wpa_s->ap_iface)
881 ap = 1;
882 #endif /* CONFIG_AP */
883
884 wpa_supplicant_notify_scanning(wpa_s, 0);
885
886 scan_res = wpa_supplicant_get_scan_results(wpa_s,
887 data ? &data->scan_info :
888 NULL, 1);
889 if (scan_res == NULL) {
890 if (wpa_s->conf->ap_scan == 2 || ap)
891 return -1;
892 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results - try "
893 "scanning again");
894 wpa_supplicant_req_new_scan(wpa_s, 1, 0);
895 return -1;
896 }
897
898 #ifndef CONFIG_NO_RANDOM_POOL
899 size_t i, num;
900 num = scan_res->num;
901 if (num > 10)
902 num = 10;
903 for (i = 0; i < num; i++) {
904 u8 buf[5];
905 struct wpa_scan_res *res = scan_res->res[i];
906 buf[0] = res->bssid[5];
907 buf[1] = res->qual & 0xff;
908 buf[2] = res->noise & 0xff;
909 buf[3] = res->level & 0xff;
910 buf[4] = res->tsf & 0xff;
911 random_add_randomness(buf, sizeof(buf));
912 }
913 #endif /* CONFIG_NO_RANDOM_POOL */
914
915 if (wpa_s->scan_res_handler) {
916 void (*scan_res_handler)(struct wpa_supplicant *wpa_s,
917 struct wpa_scan_results *scan_res);
918
919 scan_res_handler = wpa_s->scan_res_handler;
920 wpa_s->scan_res_handler = NULL;
921 scan_res_handler(wpa_s, scan_res);
922
923 wpa_scan_results_free(scan_res);
924 return 0;
925 }
926
927 if (ap) {
928 wpa_dbg(wpa_s, MSG_DEBUG, "Ignore scan results in AP mode");
929 #ifdef CONFIG_AP
930 if (wpa_s->ap_iface->scan_cb)
931 wpa_s->ap_iface->scan_cb(wpa_s->ap_iface);
932 #endif /* CONFIG_AP */
933 wpa_scan_results_free(scan_res);
934 return 0;
935 }
936
937 wpa_dbg(wpa_s, MSG_DEBUG, "New scan results available");
938 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
939 wpas_notify_scan_results(wpa_s);
940
941 wpas_notify_scan_done(wpa_s, 1);
942
943 if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s))) {
944 wpa_scan_results_free(scan_res);
945 return 0;
946 }
947
948 if (wpa_s->disconnected) {
949 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
950 wpa_scan_results_free(scan_res);
951 return 0;
952 }
953
954 if (bgscan_notify_scan(wpa_s, scan_res) == 1) {
955 wpa_scan_results_free(scan_res);
956 return 0;
957 }
958
959 selected = wpa_supplicant_pick_network(wpa_s, scan_res, &ssid);
960
961 if (selected) {
962 int skip;
963 skip = !wpa_supplicant_need_to_roam(wpa_s, selected, ssid,
964 scan_res);
965 wpa_scan_results_free(scan_res);
966 if (skip)
967 return 0;
968 wpa_supplicant_connect(wpa_s, selected, ssid);
969 wpa_supplicant_rsn_preauth_scan_results(wpa_s);
970 } else {
971 wpa_scan_results_free(scan_res);
972 wpa_dbg(wpa_s, MSG_DEBUG, "No suitable network found");
973 ssid = wpa_supplicant_pick_new_network(wpa_s);
974 if (ssid) {
975 wpa_dbg(wpa_s, MSG_DEBUG, "Setup a new network");
976 wpa_supplicant_associate(wpa_s, NULL, ssid);
977 wpa_supplicant_rsn_preauth_scan_results(wpa_s);
978 } else {
979 int timeout_sec = wpa_s->scan_interval;
980 int timeout_usec = 0;
981 #ifdef CONFIG_P2P
982 if (wpa_s->p2p_in_provisioning) {
983 /*
984 * Use shorter wait during P2P Provisioning
985 * state to speed up group formation.
986 */
987 timeout_sec = 0;
988 timeout_usec = 250000;
989 }
990 #endif /* CONFIG_P2P */
991 wpa_supplicant_req_new_scan(wpa_s, timeout_sec,
992 timeout_usec);
993 }
994 }
995 return 0;
996 }
997
998
999 static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
1000 union wpa_event_data *data)
1001 {
1002 const char *rn, *rn2;
1003 struct wpa_supplicant *ifs;
1004
1005 if (_wpa_supplicant_event_scan_results(wpa_s, data) < 0) {
1006 /*
1007 * If no scan results could be fetched, then no need to
1008 * notify those interfaces that did not actually request
1009 * this scan.
1010 */
1011 return;
1012 }
1013
1014 /*
1015 * Check other interfaces to see if they have the same radio-name. If
1016 * so, they get updated with this same scan info.
1017 */
1018 if (!wpa_s->driver->get_radio_name)
1019 return;
1020
1021 rn = wpa_s->driver->get_radio_name(wpa_s->drv_priv);
1022 if (rn == NULL || rn[0] == '\0')
1023 return;
1024
1025 wpa_dbg(wpa_s, MSG_DEBUG, "Checking for other virtual interfaces "
1026 "sharing same radio (%s) in event_scan_results", rn);
1027
1028 for (ifs = wpa_s->global->ifaces; ifs; ifs = ifs->next) {
1029 if (ifs == wpa_s || !ifs->driver->get_radio_name)
1030 continue;
1031
1032 rn2 = ifs->driver->get_radio_name(ifs->drv_priv);
1033 if (rn2 && os_strcmp(rn, rn2) == 0) {
1034 wpa_printf(MSG_DEBUG, "%s: Updating scan results from "
1035 "sibling", ifs->ifname);
1036 _wpa_supplicant_event_scan_results(ifs, data);
1037 }
1038 }
1039 }
1040
1041 #endif /* CONFIG_NO_SCAN_PROCESSING */
1042
1043
1044 static int wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
1045 union wpa_event_data *data)
1046 {
1047 int l, len, found = 0, wpa_found, rsn_found;
1048 const u8 *p;
1049
1050 wpa_dbg(wpa_s, MSG_DEBUG, "Association info event");
1051 if (data->assoc_info.req_ies)
1052 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
1053 data->assoc_info.req_ies_len);
1054 if (data->assoc_info.resp_ies) {
1055 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
1056 data->assoc_info.resp_ies_len);
1057 #ifdef CONFIG_TDLS
1058 wpa_tdls_assoc_resp_ies(wpa_s->wpa, data->assoc_info.resp_ies,
1059 data->assoc_info.resp_ies_len);
1060 #endif /* CONFIG_TDLS */
1061 }
1062 if (data->assoc_info.beacon_ies)
1063 wpa_hexdump(MSG_DEBUG, "beacon_ies",
1064 data->assoc_info.beacon_ies,
1065 data->assoc_info.beacon_ies_len);
1066 if (data->assoc_info.freq)
1067 wpa_dbg(wpa_s, MSG_DEBUG, "freq=%u MHz",
1068 data->assoc_info.freq);
1069
1070 p = data->assoc_info.req_ies;
1071 l = data->assoc_info.req_ies_len;
1072
1073 /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
1074 while (p && l >= 2) {
1075 len = p[1] + 2;
1076 if (len > l) {
1077 wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
1078 p, l);
1079 break;
1080 }
1081 if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
1082 (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
1083 (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
1084 if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
1085 break;
1086 found = 1;
1087 wpa_find_assoc_pmkid(wpa_s);
1088 break;
1089 }
1090 l -= len;
1091 p += len;
1092 }
1093 if (!found && data->assoc_info.req_ies)
1094 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1095
1096 #ifdef CONFIG_IEEE80211R
1097 #ifdef CONFIG_SME
1098 if (wpa_s->sme.auth_alg == WPA_AUTH_ALG_FT) {
1099 u8 bssid[ETH_ALEN];
1100 if (wpa_drv_get_bssid(wpa_s, bssid) < 0 ||
1101 wpa_ft_validate_reassoc_resp(wpa_s->wpa,
1102 data->assoc_info.resp_ies,
1103 data->assoc_info.resp_ies_len,
1104 bssid) < 0) {
1105 wpa_dbg(wpa_s, MSG_DEBUG, "FT: Validation of "
1106 "Reassociation Response failed");
1107 wpa_supplicant_deauthenticate(
1108 wpa_s, WLAN_REASON_INVALID_IE);
1109 return -1;
1110 }
1111 }
1112
1113 p = data->assoc_info.resp_ies;
1114 l = data->assoc_info.resp_ies_len;
1115
1116 #ifdef CONFIG_WPS_STRICT
1117 if (p && wpa_s->current_ssid &&
1118 wpa_s->current_ssid->key_mgmt == WPA_KEY_MGMT_WPS) {
1119 struct wpabuf *wps;
1120 wps = ieee802_11_vendor_ie_concat(p, l, WPS_IE_VENDOR_TYPE);
1121 if (wps == NULL) {
1122 wpa_msg(wpa_s, MSG_INFO, "WPS-STRICT: AP did not "
1123 "include WPS IE in (Re)Association Response");
1124 return -1;
1125 }
1126
1127 if (wps_validate_assoc_resp(wps) < 0) {
1128 wpabuf_free(wps);
1129 wpa_supplicant_deauthenticate(
1130 wpa_s, WLAN_REASON_INVALID_IE);
1131 return -1;
1132 }
1133 wpabuf_free(wps);
1134 }
1135 #endif /* CONFIG_WPS_STRICT */
1136
1137 /* Go through the IEs and make a copy of the MDIE, if present. */
1138 while (p && l >= 2) {
1139 len = p[1] + 2;
1140 if (len > l) {
1141 wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
1142 p, l);
1143 break;
1144 }
1145 if (p[0] == WLAN_EID_MOBILITY_DOMAIN &&
1146 p[1] >= MOBILITY_DOMAIN_ID_LEN) {
1147 wpa_s->sme.ft_used = 1;
1148 os_memcpy(wpa_s->sme.mobility_domain, p + 2,
1149 MOBILITY_DOMAIN_ID_LEN);
1150 break;
1151 }
1152 l -= len;
1153 p += len;
1154 }
1155 #endif /* CONFIG_SME */
1156
1157 wpa_sm_set_ft_params(wpa_s->wpa, data->assoc_info.resp_ies,
1158 data->assoc_info.resp_ies_len);
1159 #endif /* CONFIG_IEEE80211R */
1160
1161 /* WPA/RSN IE from Beacon/ProbeResp */
1162 p = data->assoc_info.beacon_ies;
1163 l = data->assoc_info.beacon_ies_len;
1164
1165 /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
1166 */
1167 wpa_found = rsn_found = 0;
1168 while (p && l >= 2) {
1169 len = p[1] + 2;
1170 if (len > l) {
1171 wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
1172 p, l);
1173 break;
1174 }
1175 if (!wpa_found &&
1176 p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
1177 os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
1178 wpa_found = 1;
1179 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
1180 }
1181
1182 if (!rsn_found &&
1183 p[0] == WLAN_EID_RSN && p[1] >= 2) {
1184 rsn_found = 1;
1185 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
1186 }
1187
1188 l -= len;
1189 p += len;
1190 }
1191
1192 if (!wpa_found && data->assoc_info.beacon_ies)
1193 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
1194 if (!rsn_found && data->assoc_info.beacon_ies)
1195 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
1196 if (wpa_found || rsn_found)
1197 wpa_s->ap_ies_from_associnfo = 1;
1198
1199 if (wpa_s->assoc_freq && data->assoc_info.freq &&
1200 wpa_s->assoc_freq != data->assoc_info.freq) {
1201 wpa_printf(MSG_DEBUG, "Operating frequency changed from "
1202 "%u to %u MHz",
1203 wpa_s->assoc_freq, data->assoc_info.freq);
1204 wpa_supplicant_update_scan_results(wpa_s);
1205 }
1206
1207 wpa_s->assoc_freq = data->assoc_info.freq;
1208
1209 return 0;
1210 }
1211
1212
1213 static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
1214 union wpa_event_data *data)
1215 {
1216 u8 bssid[ETH_ALEN];
1217 int ft_completed;
1218 int bssid_changed;
1219 struct wpa_driver_capa capa;
1220
1221 #ifdef CONFIG_AP
1222 if (wpa_s->ap_iface) {
1223 hostapd_notif_assoc(wpa_s->ap_iface->bss[0],
1224 data->assoc_info.addr,
1225 data->assoc_info.req_ies,
1226 data->assoc_info.req_ies_len,
1227 data->assoc_info.reassoc);
1228 return;
1229 }
1230 #endif /* CONFIG_AP */
1231
1232 ft_completed = wpa_ft_is_completed(wpa_s->wpa);
1233 if (data && wpa_supplicant_event_associnfo(wpa_s, data) < 0)
1234 return;
1235
1236 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
1237 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1238 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
1239 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) ||
1240 (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
1241 os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
1242 wpa_dbg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
1243 MACSTR, MAC2STR(bssid));
1244 random_add_randomness(bssid, ETH_ALEN);
1245 bssid_changed = os_memcmp(wpa_s->bssid, bssid, ETH_ALEN);
1246 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
1247 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1248 if (bssid_changed)
1249 wpas_notify_bssid_changed(wpa_s);
1250
1251 if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
1252 wpa_clear_keys(wpa_s, bssid);
1253 }
1254 if (wpa_supplicant_select_config(wpa_s) < 0) {
1255 wpa_supplicant_disassociate(
1256 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1257 return;
1258 }
1259 if (wpa_s->current_ssid) {
1260 struct wpa_bss *bss = NULL;
1261 struct wpa_ssid *ssid = wpa_s->current_ssid;
1262 if (ssid->ssid_len > 0)
1263 bss = wpa_bss_get(wpa_s, bssid,
1264 ssid->ssid, ssid->ssid_len);
1265 if (!bss)
1266 bss = wpa_bss_get_bssid(wpa_s, bssid);
1267 if (bss)
1268 wpa_s->current_bss = bss;
1269 }
1270 }
1271
1272 #ifdef CONFIG_SME
1273 os_memcpy(wpa_s->sme.prev_bssid, bssid, ETH_ALEN);
1274 wpa_s->sme.prev_bssid_set = 1;
1275 #endif /* CONFIG_SME */
1276
1277 wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
1278 if (wpa_s->current_ssid) {
1279 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
1280 * initialized before association, but for other modes,
1281 * initialize PC/SC here, if the current configuration needs
1282 * smartcard or SIM/USIM. */
1283 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
1284 }
1285 wpa_sm_notify_assoc(wpa_s->wpa, bssid);
1286 if (wpa_s->l2)
1287 l2_packet_notify_auth_start(wpa_s->l2);
1288
1289 /*
1290 * Set portEnabled first to FALSE in order to get EAP state machine out
1291 * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
1292 * state machine may transit to AUTHENTICATING state based on obsolete
1293 * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
1294 * AUTHENTICATED without ever giving chance to EAP state machine to
1295 * reset the state.
1296 */
1297 if (!ft_completed) {
1298 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
1299 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
1300 }
1301 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
1302 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
1303 /* 802.1X::portControl = Auto */
1304 eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
1305 wpa_s->eapol_received = 0;
1306 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1307 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE ||
1308 (wpa_s->current_ssid &&
1309 wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS)) {
1310 wpa_supplicant_cancel_auth_timeout(wpa_s);
1311 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1312 } else if (!ft_completed) {
1313 /* Timeout for receiving the first EAPOL packet */
1314 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
1315 }
1316 wpa_supplicant_cancel_scan(wpa_s);
1317
1318 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1319 wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1320 /*
1321 * We are done; the driver will take care of RSN 4-way
1322 * handshake.
1323 */
1324 wpa_supplicant_cancel_auth_timeout(wpa_s);
1325 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1326 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1327 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
1328 } else if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1329 wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
1330 /*
1331 * The driver will take care of RSN 4-way handshake, so we need
1332 * to allow EAPOL supplicant to complete its work without
1333 * waiting for WPA supplicant.
1334 */
1335 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1336 } else if (ft_completed) {
1337 /*
1338 * FT protocol completed - make sure EAPOL state machine ends
1339 * up in authenticated.
1340 */
1341 wpa_supplicant_cancel_auth_timeout(wpa_s);
1342 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1343 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1344 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
1345 }
1346
1347 if (wpa_s->pending_eapol_rx) {
1348 struct os_time now, age;
1349 os_get_time(&now);
1350 os_time_sub(&now, &wpa_s->pending_eapol_rx_time, &age);
1351 if (age.sec == 0 && age.usec < 100000 &&
1352 os_memcmp(wpa_s->pending_eapol_rx_src, bssid, ETH_ALEN) ==
1353 0) {
1354 wpa_dbg(wpa_s, MSG_DEBUG, "Process pending EAPOL "
1355 "frame that was received just before "
1356 "association notification");
1357 wpa_supplicant_rx_eapol(
1358 wpa_s, wpa_s->pending_eapol_rx_src,
1359 wpabuf_head(wpa_s->pending_eapol_rx),
1360 wpabuf_len(wpa_s->pending_eapol_rx));
1361 }
1362 wpabuf_free(wpa_s->pending_eapol_rx);
1363 wpa_s->pending_eapol_rx = NULL;
1364 }
1365
1366 if ((wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1367 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
1368 wpa_s->current_ssid && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1369 capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE) {
1370 /* Set static WEP keys again */
1371 wpa_set_wep_keys(wpa_s, wpa_s->current_ssid);
1372 }
1373
1374 #ifdef CONFIG_IBSS_RSN
1375 if (wpa_s->current_ssid &&
1376 wpa_s->current_ssid->mode == WPAS_MODE_IBSS &&
1377 wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
1378 wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE &&
1379 wpa_s->ibss_rsn == NULL) {
1380 wpa_s->ibss_rsn = ibss_rsn_init(wpa_s);
1381 if (!wpa_s->ibss_rsn) {
1382 wpa_msg(wpa_s, MSG_INFO, "Failed to init IBSS RSN");
1383 wpa_supplicant_deauthenticate(
1384 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1385 return;
1386 }
1387
1388 ibss_rsn_set_psk(wpa_s->ibss_rsn, wpa_s->current_ssid->psk);
1389 }
1390 #endif /* CONFIG_IBSS_RSN */
1391 }
1392
1393
1394 static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s,
1395 u16 reason_code)
1396 {
1397 const u8 *bssid;
1398 int authenticating;
1399 u8 prev_pending_bssid[ETH_ALEN];
1400
1401 authenticating = wpa_s->wpa_state == WPA_AUTHENTICATING;
1402 os_memcpy(prev_pending_bssid, wpa_s->pending_bssid, ETH_ALEN);
1403
1404 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1405 /*
1406 * At least Host AP driver and a Prism3 card seemed to be
1407 * generating streams of disconnected events when configuring
1408 * IBSS for WPA-None. Ignore them for now.
1409 */
1410 wpa_dbg(wpa_s, MSG_DEBUG, "Disconnect event - ignore in "
1411 "IBSS/WPA-None mode");
1412 return;
1413 }
1414
1415 if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
1416 wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1417 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
1418 "pre-shared key may be incorrect");
1419 }
1420 if (!wpa_s->auto_reconnect_disabled ||
1421 wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) {
1422 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Auto connect enabled: try to "
1423 "reconnect (wps=%d)",
1424 wpa_s->key_mgmt == WPA_KEY_MGMT_WPS);
1425 if (wpa_s->wpa_state >= WPA_ASSOCIATING)
1426 wpa_supplicant_req_scan(wpa_s, 0, 100000);
1427 } else {
1428 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Auto connect disabled: do not "
1429 "try to re-connect");
1430 wpa_s->reassociate = 0;
1431 wpa_s->disconnected = 1;
1432 }
1433 bssid = wpa_s->bssid;
1434 if (is_zero_ether_addr(bssid))
1435 bssid = wpa_s->pending_bssid;
1436 wpas_connection_failed(wpa_s, bssid);
1437 wpa_sm_notify_disassoc(wpa_s->wpa);
1438 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid=" MACSTR
1439 " reason=%d",
1440 MAC2STR(bssid), reason_code);
1441 if (wpa_supplicant_dynamic_keys(wpa_s)) {
1442 wpa_dbg(wpa_s, MSG_DEBUG, "Disconnect event - remove keys");
1443 wpa_s->keys_cleared = 0;
1444 wpa_clear_keys(wpa_s, wpa_s->bssid);
1445 }
1446 wpa_supplicant_mark_disassoc(wpa_s);
1447
1448 if (authenticating && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
1449 sme_disassoc_while_authenticating(wpa_s, prev_pending_bssid);
1450 }
1451
1452
1453 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1454 static void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx,
1455 void *sock_ctx)
1456 {
1457 struct wpa_supplicant *wpa_s = eloop_ctx;
1458
1459 if (!wpa_s->pending_mic_error_report)
1460 return;
1461
1462 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Sending pending MIC error report");
1463 wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
1464 wpa_s->pending_mic_error_report = 0;
1465 }
1466 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1467
1468
1469 static void
1470 wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
1471 union wpa_event_data *data)
1472 {
1473 int pairwise;
1474 struct os_time t;
1475
1476 wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
1477 pairwise = (data && data->michael_mic_failure.unicast);
1478 os_get_time(&t);
1479 if ((wpa_s->last_michael_mic_error &&
1480 t.sec - wpa_s->last_michael_mic_error <= 60) ||
1481 wpa_s->pending_mic_error_report) {
1482 if (wpa_s->pending_mic_error_report) {
1483 /*
1484 * Send the pending MIC error report immediately since
1485 * we are going to start countermeasures and AP better
1486 * do the same.
1487 */
1488 wpa_sm_key_request(wpa_s->wpa, 1,
1489 wpa_s->pending_mic_error_pairwise);
1490 }
1491
1492 /* Send the new MIC error report immediately since we are going
1493 * to start countermeasures and AP better do the same.
1494 */
1495 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1496
1497 /* initialize countermeasures */
1498 wpa_s->countermeasures = 1;
1499 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
1500
1501 /*
1502 * Need to wait for completion of request frame. We do not get
1503 * any callback for the message completion, so just wait a
1504 * short while and hope for the best. */
1505 os_sleep(0, 10000);
1506
1507 wpa_drv_set_countermeasures(wpa_s, 1);
1508 wpa_supplicant_deauthenticate(wpa_s,
1509 WLAN_REASON_MICHAEL_MIC_FAILURE);
1510 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
1511 wpa_s, NULL);
1512 eloop_register_timeout(60, 0,
1513 wpa_supplicant_stop_countermeasures,
1514 wpa_s, NULL);
1515 /* TODO: mark the AP rejected for 60 second. STA is
1516 * allowed to associate with another AP.. */
1517 } else {
1518 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1519 if (wpa_s->mic_errors_seen) {
1520 /*
1521 * Reduce the effectiveness of Michael MIC error
1522 * reports as a means for attacking against TKIP if
1523 * more than one MIC failure is noticed with the same
1524 * PTK. We delay the transmission of the reports by a
1525 * random time between 0 and 60 seconds in order to
1526 * force the attacker wait 60 seconds before getting
1527 * the information on whether a frame resulted in a MIC
1528 * failure.
1529 */
1530 u8 rval[4];
1531 int sec;
1532
1533 if (os_get_random(rval, sizeof(rval)) < 0)
1534 sec = os_random() % 60;
1535 else
1536 sec = WPA_GET_BE32(rval) % 60;
1537 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Delay MIC error "
1538 "report %d seconds", sec);
1539 wpa_s->pending_mic_error_report = 1;
1540 wpa_s->pending_mic_error_pairwise = pairwise;
1541 eloop_cancel_timeout(
1542 wpa_supplicant_delayed_mic_error_report,
1543 wpa_s, NULL);
1544 eloop_register_timeout(
1545 sec, os_random() % 1000000,
1546 wpa_supplicant_delayed_mic_error_report,
1547 wpa_s, NULL);
1548 } else {
1549 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1550 }
1551 #else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1552 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1553 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1554 }
1555 wpa_s->last_michael_mic_error = t.sec;
1556 wpa_s->mic_errors_seen++;
1557 }
1558
1559
1560 #ifdef CONFIG_TERMINATE_ONLASTIF
1561 static int any_interfaces(struct wpa_supplicant *head)
1562 {
1563 struct wpa_supplicant *wpa_s;
1564
1565 for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
1566 if (!wpa_s->interface_removed)
1567 return 1;
1568 return 0;
1569 }
1570 #endif /* CONFIG_TERMINATE_ONLASTIF */
1571
1572
1573 static void
1574 wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
1575 union wpa_event_data *data)
1576 {
1577 if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
1578 return;
1579
1580 switch (data->interface_status.ievent) {
1581 case EVENT_INTERFACE_ADDED:
1582 if (!wpa_s->interface_removed)
1583 break;
1584 wpa_s->interface_removed = 0;
1585 wpa_dbg(wpa_s, MSG_DEBUG, "Configured interface was added");
1586 if (wpa_supplicant_driver_init(wpa_s) < 0) {
1587 wpa_msg(wpa_s, MSG_INFO, "Failed to initialize the "
1588 "driver after interface was added");
1589 }
1590 break;
1591 case EVENT_INTERFACE_REMOVED:
1592 wpa_dbg(wpa_s, MSG_DEBUG, "Configured interface was removed");
1593 wpa_s->interface_removed = 1;
1594 wpa_supplicant_mark_disassoc(wpa_s);
1595 l2_packet_deinit(wpa_s->l2);
1596 wpa_s->l2 = NULL;
1597 #ifdef CONFIG_IBSS_RSN
1598 ibss_rsn_deinit(wpa_s->ibss_rsn);
1599 wpa_s->ibss_rsn = NULL;
1600 #endif /* CONFIG_IBSS_RSN */
1601 #ifdef CONFIG_TERMINATE_ONLASTIF
1602 /* check if last interface */
1603 if (!any_interfaces(wpa_s->global->ifaces))
1604 eloop_terminate();
1605 #endif /* CONFIG_TERMINATE_ONLASTIF */
1606 break;
1607 }
1608 }
1609
1610
1611 #ifdef CONFIG_PEERKEY
1612 static void
1613 wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
1614 union wpa_event_data *data)
1615 {
1616 if (data == NULL)
1617 return;
1618 wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
1619 }
1620 #endif /* CONFIG_PEERKEY */
1621
1622
1623 #ifdef CONFIG_TDLS
1624 static void wpa_supplicant_event_tdls(struct wpa_supplicant *wpa_s,
1625 union wpa_event_data *data)
1626 {
1627 if (data == NULL)
1628 return;
1629 switch (data->tdls.oper) {
1630 case TDLS_REQUEST_SETUP:
1631 wpa_tdls_start(wpa_s->wpa, data->tdls.peer);
1632 break;
1633 case TDLS_REQUEST_TEARDOWN:
1634 /* request from driver to add FTIE */
1635 wpa_tdls_recv_teardown_notify(wpa_s->wpa, data->tdls.peer,
1636 data->tdls.reason_code);
1637 break;
1638 }
1639 }
1640 #endif /* CONFIG_TDLS */
1641
1642
1643 #ifdef CONFIG_IEEE80211R
1644 static void
1645 wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
1646 union wpa_event_data *data)
1647 {
1648 if (data == NULL)
1649 return;
1650
1651 if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
1652 data->ft_ies.ies_len,
1653 data->ft_ies.ft_action,
1654 data->ft_ies.target_ap,
1655 data->ft_ies.ric_ies,
1656 data->ft_ies.ric_ies_len) < 0) {
1657 /* TODO: prevent MLME/driver from trying to associate? */
1658 }
1659 }
1660 #endif /* CONFIG_IEEE80211R */
1661
1662
1663 #ifdef CONFIG_IBSS_RSN
1664 static void wpa_supplicant_event_ibss_rsn_start(struct wpa_supplicant *wpa_s,
1665 union wpa_event_data *data)
1666 {
1667 struct wpa_ssid *ssid;
1668 if (wpa_s->wpa_state < WPA_ASSOCIATED)
1669 return;
1670 if (data == NULL)
1671 return;
1672 ssid = wpa_s->current_ssid;
1673 if (ssid == NULL)
1674 return;
1675 if (ssid->mode != WPAS_MODE_IBSS || !wpa_key_mgmt_wpa(ssid->key_mgmt))
1676 return;
1677
1678 ibss_rsn_start(wpa_s->ibss_rsn, data->ibss_rsn_start.peer);
1679 }
1680 #endif /* CONFIG_IBSS_RSN */
1681
1682
1683 #ifdef CONFIG_IEEE80211R
1684 static void ft_rx_action(struct wpa_supplicant *wpa_s, const u8 *data,
1685 size_t len)
1686 {
1687 const u8 *sta_addr, *target_ap_addr;
1688 u16 status;
1689
1690 wpa_hexdump(MSG_MSGDUMP, "FT: RX Action", data, len);
1691 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
1692 return; /* only SME case supported for now */
1693 if (len < 1 + 2 * ETH_ALEN + 2)
1694 return;
1695 if (data[0] != 2)
1696 return; /* Only FT Action Response is supported for now */
1697 sta_addr = data + 1;
1698 target_ap_addr = data + 1 + ETH_ALEN;
1699 status = WPA_GET_LE16(data + 1 + 2 * ETH_ALEN);
1700 wpa_dbg(wpa_s, MSG_DEBUG, "FT: Received FT Action Response: STA "
1701 MACSTR " TargetAP " MACSTR " status %u",
1702 MAC2STR(sta_addr), MAC2STR(target_ap_addr), status);
1703
1704 if (os_memcmp(sta_addr, wpa_s->own_addr, ETH_ALEN) != 0) {
1705 wpa_dbg(wpa_s, MSG_DEBUG, "FT: Foreign STA Address " MACSTR
1706 " in FT Action Response", MAC2STR(sta_addr));
1707 return;
1708 }
1709
1710 if (status) {
1711 wpa_dbg(wpa_s, MSG_DEBUG, "FT: FT Action Response indicates "
1712 "failure (status code %d)", status);
1713 /* TODO: report error to FT code(?) */
1714 return;
1715 }
1716
1717 if (wpa_ft_process_response(wpa_s->wpa, data + 1 + 2 * ETH_ALEN + 2,
1718 len - (1 + 2 * ETH_ALEN + 2), 1,
1719 target_ap_addr, NULL, 0) < 0)
1720 return;
1721
1722 #ifdef CONFIG_SME
1723 {
1724 struct wpa_bss *bss;
1725 bss = wpa_bss_get_bssid(wpa_s, target_ap_addr);
1726 if (bss)
1727 wpa_s->sme.freq = bss->freq;
1728 wpa_s->sme.auth_alg = WPA_AUTH_ALG_FT;
1729 sme_associate(wpa_s, WPAS_MODE_INFRA, target_ap_addr,
1730 WLAN_AUTH_FT);
1731 }
1732 #endif /* CONFIG_SME */
1733 }
1734 #endif /* CONFIG_IEEE80211R */
1735
1736
1737 static void wpa_supplicant_event_unprot_deauth(struct wpa_supplicant *wpa_s,
1738 struct unprot_deauth *e)
1739 {
1740 #ifdef CONFIG_IEEE80211W
1741 wpa_printf(MSG_DEBUG, "Unprotected Deauthentication frame "
1742 "dropped: " MACSTR " -> " MACSTR
1743 " (reason code %u)",
1744 MAC2STR(e->sa), MAC2STR(e->da), e->reason_code);
1745 sme_event_unprot_disconnect(wpa_s, e->sa, e->da, e->reason_code);
1746 #endif /* CONFIG_IEEE80211W */
1747 }
1748
1749
1750 static void wpa_supplicant_event_unprot_disassoc(struct wpa_supplicant *wpa_s,
1751 struct unprot_disassoc *e)
1752 {
1753 #ifdef CONFIG_IEEE80211W
1754 wpa_printf(MSG_DEBUG, "Unprotected Disassociation frame "
1755 "dropped: " MACSTR " -> " MACSTR
1756 " (reason code %u)",
1757 MAC2STR(e->sa), MAC2STR(e->da), e->reason_code);
1758 sme_event_unprot_disconnect(wpa_s, e->sa, e->da, e->reason_code);
1759 #endif /* CONFIG_IEEE80211W */
1760 }
1761
1762
1763 void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
1764 union wpa_event_data *data)
1765 {
1766 struct wpa_supplicant *wpa_s = ctx;
1767 u16 reason_code = 0;
1768
1769 if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED &&
1770 event != EVENT_INTERFACE_ENABLED &&
1771 event != EVENT_INTERFACE_STATUS) {
1772 wpa_dbg(wpa_s, MSG_DEBUG, "Ignore event %d while interface is "
1773 "disabled", event);
1774 return;
1775 }
1776
1777 wpa_dbg(wpa_s, MSG_DEBUG, "Event %d received on interface %s",
1778 event, wpa_s->ifname);
1779
1780 switch (event) {
1781 case EVENT_AUTH:
1782 sme_event_auth(wpa_s, data);
1783 break;
1784 case EVENT_ASSOC:
1785 wpa_supplicant_event_assoc(wpa_s, data);
1786 break;
1787 case EVENT_DISASSOC:
1788 wpa_dbg(wpa_s, MSG_DEBUG, "Disassociation notification");
1789 if (data) {
1790 wpa_dbg(wpa_s, MSG_DEBUG, " * reason %u",
1791 data->disassoc_info.reason_code);
1792 if (data->disassoc_info.addr)
1793 wpa_dbg(wpa_s, MSG_DEBUG, " * address " MACSTR,
1794 MAC2STR(data->disassoc_info.addr));
1795 }
1796 #ifdef CONFIG_AP
1797 if (wpa_s->ap_iface && data && data->disassoc_info.addr) {
1798 hostapd_notif_disassoc(wpa_s->ap_iface->bss[0],
1799 data->disassoc_info.addr);
1800 break;
1801 }
1802 #endif /* CONFIG_AP */
1803 if (data) {
1804 reason_code = data->disassoc_info.reason_code;
1805 wpa_hexdump(MSG_DEBUG, "Disassociation frame IE(s)",
1806 data->disassoc_info.ie,
1807 data->disassoc_info.ie_len);
1808 #ifdef CONFIG_P2P
1809 wpas_p2p_disassoc_notif(
1810 wpa_s, data->disassoc_info.addr, reason_code,
1811 data->disassoc_info.ie,
1812 data->disassoc_info.ie_len);
1813 #endif /* CONFIG_P2P */
1814 }
1815 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
1816 sme_event_disassoc(wpa_s, data);
1817 /* fall through */
1818 case EVENT_DEAUTH:
1819 if (event == EVENT_DEAUTH) {
1820 wpa_dbg(wpa_s, MSG_DEBUG,
1821 "Deauthentication notification");
1822 if (data) {
1823 reason_code = data->deauth_info.reason_code;
1824 wpa_dbg(wpa_s, MSG_DEBUG, " * reason %u",
1825 data->deauth_info.reason_code);
1826 if (data->deauth_info.addr) {
1827 wpa_dbg(wpa_s, MSG_DEBUG, " * address "
1828 MACSTR,
1829 MAC2STR(data->deauth_info.
1830 addr));
1831 }
1832 wpa_hexdump(MSG_DEBUG,
1833 "Deauthentication frame IE(s)",
1834 data->deauth_info.ie,
1835 data->deauth_info.ie_len);
1836 #ifdef CONFIG_P2P
1837 wpas_p2p_deauth_notif(
1838 wpa_s, data->deauth_info.addr,
1839 reason_code,
1840 data->deauth_info.ie,
1841 data->deauth_info.ie_len);
1842 #endif /* CONFIG_P2P */
1843 }
1844 }
1845 #ifdef CONFIG_AP
1846 if (wpa_s->ap_iface && data && data->deauth_info.addr) {
1847 hostapd_notif_disassoc(wpa_s->ap_iface->bss[0],
1848 data->deauth_info.addr);
1849 break;
1850 }
1851 #endif /* CONFIG_AP */
1852 wpa_supplicant_event_disassoc(wpa_s, reason_code);
1853 break;
1854 case EVENT_MICHAEL_MIC_FAILURE:
1855 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
1856 break;
1857 #ifndef CONFIG_NO_SCAN_PROCESSING
1858 case EVENT_SCAN_RESULTS:
1859 wpa_supplicant_event_scan_results(wpa_s, data);
1860 break;
1861 #endif /* CONFIG_NO_SCAN_PROCESSING */
1862 case EVENT_ASSOCINFO:
1863 wpa_supplicant_event_associnfo(wpa_s, data);
1864 break;
1865 case EVENT_INTERFACE_STATUS:
1866 wpa_supplicant_event_interface_status(wpa_s, data);
1867 break;
1868 case EVENT_PMKID_CANDIDATE:
1869 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
1870 break;
1871 #ifdef CONFIG_PEERKEY
1872 case EVENT_STKSTART:
1873 wpa_supplicant_event_stkstart(wpa_s, data);
1874 break;
1875 #endif /* CONFIG_PEERKEY */
1876 #ifdef CONFIG_TDLS
1877 case EVENT_TDLS:
1878 wpa_supplicant_event_tdls(wpa_s, data);
1879 break;
1880 #endif /* CONFIG_TDLS */
1881 #ifdef CONFIG_IEEE80211R
1882 case EVENT_FT_RESPONSE:
1883 wpa_supplicant_event_ft_response(wpa_s, data);
1884 break;
1885 #endif /* CONFIG_IEEE80211R */
1886 #ifdef CONFIG_IBSS_RSN
1887 case EVENT_IBSS_RSN_START:
1888 wpa_supplicant_event_ibss_rsn_start(wpa_s, data);
1889 break;
1890 #endif /* CONFIG_IBSS_RSN */
1891 case EVENT_ASSOC_REJECT:
1892 if (data->assoc_reject.bssid)
1893 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_ASSOC_REJECT
1894 "bssid=" MACSTR " status_code=%u",
1895 MAC2STR(data->assoc_reject.bssid),
1896 data->assoc_reject.status_code);
1897 else
1898 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_ASSOC_REJECT
1899 "status_code=%u",
1900 data->assoc_reject.status_code);
1901 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
1902 sme_event_assoc_reject(wpa_s, data);
1903 break;
1904 case EVENT_AUTH_TIMED_OUT:
1905 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
1906 sme_event_auth_timed_out(wpa_s, data);
1907 break;
1908 case EVENT_ASSOC_TIMED_OUT:
1909 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
1910 sme_event_assoc_timed_out(wpa_s, data);
1911 break;
1912 #ifdef CONFIG_AP
1913 case EVENT_TX_STATUS:
1914 wpa_dbg(wpa_s, MSG_DEBUG, "EVENT_TX_STATUS dst=" MACSTR
1915 " type=%d stype=%d",
1916 MAC2STR(data->tx_status.dst),
1917 data->tx_status.type, data->tx_status.stype);
1918 if (wpa_s->ap_iface == NULL) {
1919 #ifdef CONFIG_P2P
1920 if (data->tx_status.type == WLAN_FC_TYPE_MGMT &&
1921 data->tx_status.stype == WLAN_FC_STYPE_ACTION)
1922 wpas_send_action_tx_status(
1923 wpa_s, data->tx_status.dst,
1924 data->tx_status.data,
1925 data->tx_status.data_len,
1926 data->tx_status.ack ?
1927 P2P_SEND_ACTION_SUCCESS :
1928 P2P_SEND_ACTION_NO_ACK);
1929 #endif /* CONFIG_P2P */
1930 break;
1931 }
1932 #ifdef CONFIG_P2P
1933 wpa_dbg(wpa_s, MSG_DEBUG, "EVENT_TX_STATUS pending_dst="
1934 MACSTR, MAC2STR(wpa_s->parent->pending_action_dst));
1935 /*
1936 * Catch TX status events for Action frames we sent via group
1937 * interface in GO mode.
1938 */
1939 if (data->tx_status.type == WLAN_FC_TYPE_MGMT &&
1940 data->tx_status.stype == WLAN_FC_STYPE_ACTION &&
1941 os_memcmp(wpa_s->parent->pending_action_dst,
1942 data->tx_status.dst, ETH_ALEN) == 0) {
1943 wpas_send_action_tx_status(
1944 wpa_s->parent, data->tx_status.dst,
1945 data->tx_status.data,
1946 data->tx_status.data_len,
1947 data->tx_status.ack ?
1948 P2P_SEND_ACTION_SUCCESS :
1949 P2P_SEND_ACTION_NO_ACK);
1950 break;
1951 }
1952 #endif /* CONFIG_P2P */
1953 switch (data->tx_status.type) {
1954 case WLAN_FC_TYPE_MGMT:
1955 ap_mgmt_tx_cb(wpa_s, data->tx_status.data,
1956 data->tx_status.data_len,
1957 data->tx_status.stype,
1958 data->tx_status.ack);
1959 break;
1960 case WLAN_FC_TYPE_DATA:
1961 ap_tx_status(wpa_s, data->tx_status.dst,
1962 data->tx_status.data,
1963 data->tx_status.data_len,
1964 data->tx_status.ack);
1965 break;
1966 }
1967 break;
1968 case EVENT_RX_FROM_UNKNOWN:
1969 if (wpa_s->ap_iface == NULL)
1970 break;
1971 ap_rx_from_unknown_sta(wpa_s, data->rx_from_unknown.frame,
1972 data->rx_from_unknown.len);
1973 break;
1974 case EVENT_RX_MGMT:
1975 if (wpa_s->ap_iface == NULL) {
1976 #ifdef CONFIG_P2P
1977 u16 fc, stype;
1978 const struct ieee80211_mgmt *mgmt;
1979 mgmt = (const struct ieee80211_mgmt *)
1980 data->rx_mgmt.frame;
1981 fc = le_to_host16(mgmt->frame_control);
1982 stype = WLAN_FC_GET_STYPE(fc);
1983 if (stype == WLAN_FC_STYPE_PROBE_REQ &&
1984 data->rx_mgmt.frame_len > 24) {
1985 const u8 *src = mgmt->sa;
1986 const u8 *ie = mgmt->u.probe_req.variable;
1987 size_t ie_len = data->rx_mgmt.frame_len -
1988 (mgmt->u.probe_req.variable -
1989 data->rx_mgmt.frame);
1990 wpas_p2p_probe_req_rx(wpa_s, src, ie, ie_len);
1991 break;
1992 }
1993 #endif /* CONFIG_P2P */
1994 wpa_dbg(wpa_s, MSG_DEBUG, "AP: ignore received "
1995 "management frame in non-AP mode");
1996 break;
1997 }
1998 ap_mgmt_rx(wpa_s, &data->rx_mgmt);
1999 break;
2000 #endif /* CONFIG_AP */
2001 case EVENT_RX_ACTION:
2002 wpa_dbg(wpa_s, MSG_DEBUG, "Received Action frame: SA=" MACSTR
2003 " Category=%u DataLen=%d freq=%d MHz",
2004 MAC2STR(data->rx_action.sa),
2005 data->rx_action.category, (int) data->rx_action.len,
2006 data->rx_action.freq);
2007 #ifdef CONFIG_IEEE80211R
2008 if (data->rx_action.category == WLAN_ACTION_FT) {
2009 ft_rx_action(wpa_s, data->rx_action.data,
2010 data->rx_action.len);
2011 break;
2012 }
2013 #endif /* CONFIG_IEEE80211R */
2014 #ifdef CONFIG_IEEE80211W
2015 #ifdef CONFIG_SME
2016 if (data->rx_action.category == WLAN_ACTION_SA_QUERY) {
2017 sme_sa_query_rx(wpa_s, data->rx_action.sa,
2018 data->rx_action.data,
2019 data->rx_action.len);
2020 break;
2021 }
2022 #endif /* CONFIG_SME */
2023 #endif /* CONFIG_IEEE80211W */
2024 #ifdef CONFIG_P2P
2025 wpas_p2p_rx_action(wpa_s, data->rx_action.da,
2026 data->rx_action.sa,
2027 data->rx_action.bssid,
2028 data->rx_action.category,
2029 data->rx_action.data,
2030 data->rx_action.len, data->rx_action.freq);
2031 #endif /* CONFIG_P2P */
2032 break;
2033 case EVENT_RX_PROBE_REQ:
2034 if (data->rx_probe_req.sa == NULL ||
2035 data->rx_probe_req.ie == NULL)
2036 break;
2037 #ifdef CONFIG_AP
2038 if (wpa_s->ap_iface) {
2039 hostapd_probe_req_rx(wpa_s->ap_iface->bss[0],
2040 data->rx_probe_req.sa,
2041 data->rx_probe_req.ie,
2042 data->rx_probe_req.ie_len);
2043 break;
2044 }
2045 #endif /* CONFIG_AP */
2046 #ifdef CONFIG_P2P
2047 wpas_p2p_probe_req_rx(wpa_s, data->rx_probe_req.sa,
2048 data->rx_probe_req.ie,
2049 data->rx_probe_req.ie_len);
2050 #endif /* CONFIG_P2P */
2051 break;
2052 #ifdef CONFIG_P2P
2053 case EVENT_REMAIN_ON_CHANNEL:
2054 wpas_p2p_remain_on_channel_cb(
2055 wpa_s, data->remain_on_channel.freq,
2056 data->remain_on_channel.duration);
2057 break;
2058 case EVENT_CANCEL_REMAIN_ON_CHANNEL:
2059 wpas_p2p_cancel_remain_on_channel_cb(
2060 wpa_s, data->remain_on_channel.freq);
2061 break;
2062 case EVENT_P2P_DEV_FOUND: {
2063 struct p2p_peer_info peer_info;
2064
2065 os_memset(&peer_info, 0, sizeof(peer_info));
2066 if (data->p2p_dev_found.dev_addr)
2067 os_memcpy(peer_info.p2p_device_addr,
2068 data->p2p_dev_found.dev_addr, ETH_ALEN);
2069 if (data->p2p_dev_found.pri_dev_type)
2070 os_memcpy(peer_info.pri_dev_type,
2071 data->p2p_dev_found.pri_dev_type,
2072 sizeof(peer_info.pri_dev_type));
2073 if (data->p2p_dev_found.dev_name)
2074 os_strlcpy(peer_info.device_name,
2075 data->p2p_dev_found.dev_name,
2076 sizeof(peer_info.device_name));
2077 peer_info.config_methods = data->p2p_dev_found.config_methods;
2078 peer_info.dev_capab = data->p2p_dev_found.dev_capab;
2079 peer_info.group_capab = data->p2p_dev_found.group_capab;
2080
2081 /*
2082 * FIX: new_device=1 is not necessarily correct. We should
2083 * maintain a P2P peer database in wpa_supplicant and update
2084 * this information based on whether the peer is truly new.
2085 */
2086 wpas_dev_found(wpa_s, data->p2p_dev_found.addr, &peer_info, 1);
2087 break;
2088 }
2089 case EVENT_P2P_GO_NEG_REQ_RX:
2090 wpas_go_neg_req_rx(wpa_s, data->p2p_go_neg_req_rx.src,
2091 data->p2p_go_neg_req_rx.dev_passwd_id);
2092 break;
2093 case EVENT_P2P_GO_NEG_COMPLETED:
2094 wpas_go_neg_completed(wpa_s, data->p2p_go_neg_completed.res);
2095 break;
2096 case EVENT_P2P_PROV_DISC_REQUEST:
2097 wpas_prov_disc_req(wpa_s, data->p2p_prov_disc_req.peer,
2098 data->p2p_prov_disc_req.config_methods,
2099 data->p2p_prov_disc_req.dev_addr,
2100 data->p2p_prov_disc_req.pri_dev_type,
2101 data->p2p_prov_disc_req.dev_name,
2102 data->p2p_prov_disc_req.supp_config_methods,
2103 data->p2p_prov_disc_req.dev_capab,
2104 data->p2p_prov_disc_req.group_capab);
2105 break;
2106 case EVENT_P2P_PROV_DISC_RESPONSE:
2107 wpas_prov_disc_resp(wpa_s, data->p2p_prov_disc_resp.peer,
2108 data->p2p_prov_disc_resp.config_methods);
2109 break;
2110 case EVENT_P2P_SD_REQUEST:
2111 wpas_sd_request(wpa_s, data->p2p_sd_req.freq,
2112 data->p2p_sd_req.sa,
2113 data->p2p_sd_req.dialog_token,
2114 data->p2p_sd_req.update_indic,
2115 data->p2p_sd_req.tlvs,
2116 data->p2p_sd_req.tlvs_len);
2117 break;
2118 case EVENT_P2P_SD_RESPONSE:
2119 wpas_sd_response(wpa_s, data->p2p_sd_resp.sa,
2120 data->p2p_sd_resp.update_indic,
2121 data->p2p_sd_resp.tlvs,
2122 data->p2p_sd_resp.tlvs_len);
2123 break;
2124 #endif /* CONFIG_P2P */
2125 #ifdef CONFIG_CLIENT_MLME
2126 case EVENT_MLME_RX: {
2127 struct ieee80211_rx_status rx_status;
2128 os_memset(&rx_status, 0, sizeof(rx_status));
2129 rx_status.freq = data->mlme_rx.freq;
2130 rx_status.channel = data->mlme_rx.channel;
2131 rx_status.ssi = data->mlme_rx.ssi;
2132 ieee80211_sta_rx(wpa_s, data->mlme_rx.buf, data->mlme_rx.len,
2133 &rx_status);
2134 break;
2135 }
2136 #endif /* CONFIG_CLIENT_MLME */
2137 case EVENT_EAPOL_RX:
2138 wpa_supplicant_rx_eapol(wpa_s, data->eapol_rx.src,
2139 data->eapol_rx.data,
2140 data->eapol_rx.data_len);
2141 break;
2142 case EVENT_SIGNAL_CHANGE:
2143 bgscan_notify_signal_change(
2144 wpa_s, data->signal_change.above_threshold,
2145 data->signal_change.current_signal,
2146 data->signal_change.current_noise,
2147 data->signal_change.current_txrate);
2148 break;
2149 case EVENT_INTERFACE_ENABLED:
2150 wpa_dbg(wpa_s, MSG_DEBUG, "Interface was enabled");
2151 if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
2152 #ifdef CONFIG_AP
2153 if (!wpa_s->ap_iface) {
2154 wpa_supplicant_set_state(wpa_s,
2155 WPA_DISCONNECTED);
2156 wpa_supplicant_req_scan(wpa_s, 0, 0);
2157 } else
2158 wpa_supplicant_set_state(wpa_s,
2159 WPA_COMPLETED);
2160 #else /* CONFIG_AP */
2161 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2162 wpa_supplicant_req_scan(wpa_s, 0, 0);
2163 #endif /* CONFIG_AP */
2164 }
2165 break;
2166 case EVENT_INTERFACE_DISABLED:
2167 wpa_dbg(wpa_s, MSG_DEBUG, "Interface was disabled");
2168 wpa_supplicant_mark_disassoc(wpa_s);
2169 wpa_supplicant_set_state(wpa_s, WPA_INTERFACE_DISABLED);
2170 break;
2171 case EVENT_CHANNEL_LIST_CHANGED:
2172 if (wpa_s->drv_priv == NULL)
2173 break; /* Ignore event during drv initialization */
2174 #ifdef CONFIG_P2P
2175 wpas_p2p_update_channel_list(wpa_s);
2176 #endif /* CONFIG_P2P */
2177 break;
2178 case EVENT_INTERFACE_UNAVAILABLE:
2179 #ifdef CONFIG_P2P
2180 wpas_p2p_interface_unavailable(wpa_s);
2181 #endif /* CONFIG_P2P */
2182 break;
2183 case EVENT_BEST_CHANNEL:
2184 wpa_dbg(wpa_s, MSG_DEBUG, "Best channel event received "
2185 "(%d %d %d)",
2186 data->best_chan.freq_24, data->best_chan.freq_5,
2187 data->best_chan.freq_overall);
2188 wpa_s->best_24_freq = data->best_chan.freq_24;
2189 wpa_s->best_5_freq = data->best_chan.freq_5;
2190 wpa_s->best_overall_freq = data->best_chan.freq_overall;
2191 #ifdef CONFIG_P2P
2192 wpas_p2p_update_best_channels(wpa_s, data->best_chan.freq_24,
2193 data->best_chan.freq_5,
2194 data->best_chan.freq_overall);
2195 #endif /* CONFIG_P2P */
2196 break;
2197 case EVENT_UNPROT_DEAUTH:
2198 wpa_supplicant_event_unprot_deauth(wpa_s,
2199 &data->unprot_deauth);
2200 break;
2201 case EVENT_UNPROT_DISASSOC:
2202 wpa_supplicant_event_unprot_disassoc(wpa_s,
2203 &data->unprot_disassoc);
2204 break;
2205 case EVENT_STATION_LOW_ACK:
2206 #ifdef CONFIG_AP
2207 if (wpa_s->ap_iface && data)
2208 hostapd_event_sta_low_ack(wpa_s->ap_iface->bss[0],
2209 data->low_ack.addr);
2210 #endif /* CONFIG_AP */
2211 break;
2212 case EVENT_IBSS_PEER_LOST:
2213 #ifdef CONFIG_IBSS_RSN
2214 ibss_rsn_stop(wpa_s->ibss_rsn, data->ibss_peer_lost.peer);
2215 #endif /* CONFIG_IBSS_RSN */
2216 break;
2217 default:
2218 wpa_msg(wpa_s, MSG_INFO, "Unknown event %d", event);
2219 break;
2220 }
2221 }
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