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GAS: Add a generic GAS query module
[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 "gas_query.h"
42 #include "p2p_supplicant.h"
43 #include "bgscan.h"
44 #include "ap.h"
45 #include "bss.h"
46 #include "mlme.h"
47 #include "scan.h"
48
49
50 static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
51 {
52 struct wpa_ssid *ssid, *old_ssid;
53
54 if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
55 return 0;
56
57 wpa_dbg(wpa_s, MSG_DEBUG, "Select network based on association "
58 "information");
59 ssid = wpa_supplicant_get_ssid(wpa_s);
60 if (ssid == NULL) {
61 wpa_msg(wpa_s, MSG_INFO,
62 "No network configuration found for the current AP");
63 return -1;
64 }
65
66 if (ssid->disabled) {
67 wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is disabled");
68 return -1;
69 }
70
71 wpa_dbg(wpa_s, MSG_DEBUG, "Network configuration found for the "
72 "current AP");
73 if (ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
74 WPA_KEY_MGMT_WPA_NONE |
75 WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_FT_IEEE8021X |
76 WPA_KEY_MGMT_PSK_SHA256 |
77 WPA_KEY_MGMT_IEEE8021X_SHA256)) {
78 u8 wpa_ie[80];
79 size_t wpa_ie_len = sizeof(wpa_ie);
80 wpa_supplicant_set_suites(wpa_s, NULL, ssid,
81 wpa_ie, &wpa_ie_len);
82 } else {
83 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
84 }
85
86 if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
87 eapol_sm_invalidate_cached_session(wpa_s->eapol);
88 old_ssid = wpa_s->current_ssid;
89 wpa_s->current_ssid = ssid;
90 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
91 wpa_supplicant_initiate_eapol(wpa_s);
92 if (old_ssid != wpa_s->current_ssid)
93 wpas_notify_network_changed(wpa_s);
94
95 return 0;
96 }
97
98
99 static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
100 void *sock_ctx)
101 {
102 struct wpa_supplicant *wpa_s = eloop_ctx;
103
104 if (wpa_s->countermeasures) {
105 wpa_s->countermeasures = 0;
106 wpa_drv_set_countermeasures(wpa_s, 0);
107 wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
108 wpa_supplicant_req_scan(wpa_s, 0, 0);
109 }
110 }
111
112
113 void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
114 {
115 int bssid_changed;
116
117 #ifdef CONFIG_IBSS_RSN
118 ibss_rsn_deinit(wpa_s->ibss_rsn);
119 wpa_s->ibss_rsn = NULL;
120 #endif /* CONFIG_IBSS_RSN */
121
122 #ifdef CONFIG_AP
123 wpa_supplicant_ap_deinit(wpa_s);
124 #endif /* CONFIG_AP */
125
126 if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED)
127 return;
128
129 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
130 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
131 os_memset(wpa_s->bssid, 0, ETH_ALEN);
132 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
133 wpa_s->current_bss = NULL;
134 wpa_s->assoc_freq = 0;
135 #ifdef CONFIG_IEEE80211R
136 #ifdef CONFIG_SME
137 if (wpa_s->sme.ft_ies)
138 sme_update_ft_ies(wpa_s, NULL, NULL, 0);
139 #endif /* CONFIG_SME */
140 #endif /* CONFIG_IEEE80211R */
141
142 if (bssid_changed)
143 wpas_notify_bssid_changed(wpa_s);
144
145 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
146 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
147 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
148 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
149 wpa_s->ap_ies_from_associnfo = 0;
150 }
151
152
153 static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
154 {
155 struct wpa_ie_data ie;
156 int pmksa_set = -1;
157 size_t i;
158
159 if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
160 ie.pmkid == NULL)
161 return;
162
163 for (i = 0; i < ie.num_pmkid; i++) {
164 pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
165 ie.pmkid + i * PMKID_LEN,
166 NULL, NULL, 0);
167 if (pmksa_set == 0) {
168 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
169 break;
170 }
171 }
172
173 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from "
174 "PMKSA cache", pmksa_set == 0 ? "" : "not ");
175 }
176
177
178 static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
179 union wpa_event_data *data)
180 {
181 if (data == NULL) {
182 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: No data in PMKID candidate "
183 "event");
184 return;
185 }
186 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
187 " index=%d preauth=%d",
188 MAC2STR(data->pmkid_candidate.bssid),
189 data->pmkid_candidate.index,
190 data->pmkid_candidate.preauth);
191
192 pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
193 data->pmkid_candidate.index,
194 data->pmkid_candidate.preauth);
195 }
196
197
198 static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
199 {
200 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
201 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
202 return 0;
203
204 #ifdef IEEE8021X_EAPOL
205 if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
206 wpa_s->current_ssid &&
207 !(wpa_s->current_ssid->eapol_flags &
208 (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
209 EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
210 /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
211 * plaintext or static WEP keys). */
212 return 0;
213 }
214 #endif /* IEEE8021X_EAPOL */
215
216 return 1;
217 }
218
219
220 /**
221 * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
222 * @wpa_s: pointer to wpa_supplicant data
223 * @ssid: Configuration data for the network
224 * Returns: 0 on success, -1 on failure
225 *
226 * This function is called when starting authentication with a network that is
227 * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
228 */
229 int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
230 struct wpa_ssid *ssid)
231 {
232 #ifdef IEEE8021X_EAPOL
233 int aka = 0, sim = 0, type;
234
235 if (ssid->eap.pcsc == NULL || wpa_s->scard != NULL)
236 return 0;
237
238 if (ssid->eap.eap_methods == NULL) {
239 sim = 1;
240 aka = 1;
241 } else {
242 struct eap_method_type *eap = ssid->eap.eap_methods;
243 while (eap->vendor != EAP_VENDOR_IETF ||
244 eap->method != EAP_TYPE_NONE) {
245 if (eap->vendor == EAP_VENDOR_IETF) {
246 if (eap->method == EAP_TYPE_SIM)
247 sim = 1;
248 else if (eap->method == EAP_TYPE_AKA)
249 aka = 1;
250 }
251 eap++;
252 }
253 }
254
255 if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
256 sim = 0;
257 if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL)
258 aka = 0;
259
260 if (!sim && !aka) {
261 wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is configured to "
262 "use SIM, but neither EAP-SIM nor EAP-AKA are "
263 "enabled");
264 return 0;
265 }
266
267 wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is configured to use SIM "
268 "(sim=%d aka=%d) - initialize PCSC", sim, aka);
269 if (sim && aka)
270 type = SCARD_TRY_BOTH;
271 else if (aka)
272 type = SCARD_USIM_ONLY;
273 else
274 type = SCARD_GSM_SIM_ONLY;
275
276 wpa_s->scard = scard_init(type);
277 if (wpa_s->scard == NULL) {
278 wpa_msg(wpa_s, MSG_WARNING, "Failed to initialize SIM "
279 "(pcsc-lite)");
280 return -1;
281 }
282 wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
283 eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
284 #endif /* IEEE8021X_EAPOL */
285
286 return 0;
287 }
288
289
290 #ifndef CONFIG_NO_SCAN_PROCESSING
291 static int wpa_supplicant_match_privacy(struct wpa_scan_res *bss,
292 struct wpa_ssid *ssid)
293 {
294 int i, privacy = 0;
295
296 if (ssid->mixed_cell)
297 return 1;
298
299 #ifdef CONFIG_WPS
300 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
301 return 1;
302 #endif /* CONFIG_WPS */
303
304 for (i = 0; i < NUM_WEP_KEYS; i++) {
305 if (ssid->wep_key_len[i]) {
306 privacy = 1;
307 break;
308 }
309 }
310 #ifdef IEEE8021X_EAPOL
311 if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
312 ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
313 EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
314 privacy = 1;
315 #endif /* IEEE8021X_EAPOL */
316
317 if (wpa_key_mgmt_wpa(ssid->key_mgmt))
318 privacy = 1;
319
320 if (bss->caps & IEEE80211_CAP_PRIVACY)
321 return privacy;
322 return !privacy;
323 }
324
325
326 static int wpa_supplicant_ssid_bss_match(struct wpa_supplicant *wpa_s,
327 struct wpa_ssid *ssid,
328 struct wpa_scan_res *bss)
329 {
330 struct wpa_ie_data ie;
331 int proto_match = 0;
332 const u8 *rsn_ie, *wpa_ie;
333 int ret;
334 int wep_ok;
335
336 ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss);
337 if (ret >= 0)
338 return ret;
339
340 /* Allow TSN if local configuration accepts WEP use without WPA/WPA2 */
341 wep_ok = !wpa_key_mgmt_wpa(ssid->key_mgmt) &&
342 (((ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
343 ssid->wep_key_len[ssid->wep_tx_keyidx] > 0) ||
344 (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA));
345
346 rsn_ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
347 while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
348 proto_match++;
349
350 if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
351 wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - parse "
352 "failed");
353 break;
354 }
355
356 if (wep_ok &&
357 (ie.group_cipher & (WPA_CIPHER_WEP40 | WPA_CIPHER_WEP104)))
358 {
359 wpa_dbg(wpa_s, MSG_DEBUG, " selected based on TSN "
360 "in RSN IE");
361 return 1;
362 }
363
364 if (!(ie.proto & ssid->proto)) {
365 wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - proto "
366 "mismatch");
367 break;
368 }
369
370 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
371 wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - PTK "
372 "cipher mismatch");
373 break;
374 }
375
376 if (!(ie.group_cipher & ssid->group_cipher)) {
377 wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - GTK "
378 "cipher mismatch");
379 break;
380 }
381
382 if (!(ie.key_mgmt & ssid->key_mgmt)) {
383 wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - key mgmt "
384 "mismatch");
385 break;
386 }
387
388 #ifdef CONFIG_IEEE80211W
389 if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
390 ssid->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) {
391 wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - no mgmt "
392 "frame protection");
393 break;
394 }
395 #endif /* CONFIG_IEEE80211W */
396
397 wpa_dbg(wpa_s, MSG_DEBUG, " selected based on RSN IE");
398 return 1;
399 }
400
401 wpa_ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
402 while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
403 proto_match++;
404
405 if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) {
406 wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - parse "
407 "failed");
408 break;
409 }
410
411 if (wep_ok &&
412 (ie.group_cipher & (WPA_CIPHER_WEP40 | WPA_CIPHER_WEP104)))
413 {
414 wpa_dbg(wpa_s, MSG_DEBUG, " selected based on TSN "
415 "in WPA IE");
416 return 1;
417 }
418
419 if (!(ie.proto & ssid->proto)) {
420 wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - proto "
421 "mismatch");
422 break;
423 }
424
425 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
426 wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - PTK "
427 "cipher mismatch");
428 break;
429 }
430
431 if (!(ie.group_cipher & ssid->group_cipher)) {
432 wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - GTK "
433 "cipher mismatch");
434 break;
435 }
436
437 if (!(ie.key_mgmt & ssid->key_mgmt)) {
438 wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - key mgmt "
439 "mismatch");
440 break;
441 }
442
443 wpa_dbg(wpa_s, MSG_DEBUG, " selected based on WPA IE");
444 return 1;
445 }
446
447 if ((ssid->proto & (WPA_PROTO_WPA | WPA_PROTO_RSN)) &&
448 wpa_key_mgmt_wpa(ssid->key_mgmt) && proto_match == 0) {
449 wpa_dbg(wpa_s, MSG_DEBUG, " skip - no WPA/RSN proto match");
450 return 0;
451 }
452
453 if (!wpa_key_mgmt_wpa(ssid->key_mgmt)) {
454 wpa_dbg(wpa_s, MSG_DEBUG, " allow in non-WPA/WPA2");
455 return 1;
456 }
457
458 wpa_dbg(wpa_s, MSG_DEBUG, " reject due to mismatch with "
459 "WPA/WPA2");
460
461 return 0;
462 }
463
464
465 static int freq_allowed(int *freqs, int freq)
466 {
467 int i;
468
469 if (freqs == NULL)
470 return 1;
471
472 for (i = 0; freqs[i]; i++)
473 if (freqs[i] == freq)
474 return 1;
475 return 0;
476 }
477
478
479 static struct wpa_ssid * wpa_scan_res_match(struct wpa_supplicant *wpa_s,
480 int i, struct wpa_scan_res *bss,
481 struct wpa_ssid *group)
482 {
483 const u8 *ssid_;
484 u8 wpa_ie_len, rsn_ie_len, ssid_len;
485 int wpa;
486 struct wpa_blacklist *e;
487 const u8 *ie;
488 struct wpa_ssid *ssid;
489
490 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
491 ssid_ = ie ? ie + 2 : (u8 *) "";
492 ssid_len = ie ? ie[1] : 0;
493
494 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
495 wpa_ie_len = ie ? ie[1] : 0;
496
497 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
498 rsn_ie_len = ie ? ie[1] : 0;
499
500 wpa_dbg(wpa_s, MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
501 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x level=%d%s",
502 i, MAC2STR(bss->bssid), wpa_ssid_txt(ssid_, ssid_len),
503 wpa_ie_len, rsn_ie_len, bss->caps, bss->level,
504 wpa_scan_get_vendor_ie(bss, WPS_IE_VENDOR_TYPE) ? " wps" : "");
505
506 e = wpa_blacklist_get(wpa_s, bss->bssid);
507 if (e) {
508 int limit = 1;
509 if (wpa_supplicant_enabled_networks(wpa_s->conf) == 1) {
510 /*
511 * When only a single network is enabled, we can
512 * trigger blacklisting on the first failure. This
513 * should not be done with multiple enabled networks to
514 * avoid getting forced to move into a worse ESS on
515 * single error if there are no other BSSes of the
516 * current ESS.
517 */
518 limit = 0;
519 }
520 if (e->count > limit) {
521 wpa_dbg(wpa_s, MSG_DEBUG, " skip - blacklisted "
522 "(count=%d limit=%d)", e->count, limit);
523 return NULL;
524 }
525 }
526
527 if (ssid_len == 0) {
528 wpa_dbg(wpa_s, MSG_DEBUG, " skip - SSID not known");
529 return NULL;
530 }
531
532 wpa = wpa_ie_len > 0 || rsn_ie_len > 0;
533
534 for (ssid = group; ssid; ssid = ssid->pnext) {
535 int check_ssid = wpa ? 1 : (ssid->ssid_len != 0);
536
537 if (ssid->disabled) {
538 wpa_dbg(wpa_s, MSG_DEBUG, " skip - disabled");
539 continue;
540 }
541
542 #ifdef CONFIG_WPS
543 if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && e && e->count > 0) {
544 wpa_dbg(wpa_s, MSG_DEBUG, " skip - blacklisted "
545 "(WPS)");
546 continue;
547 }
548
549 if (wpa && ssid->ssid_len == 0 &&
550 wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
551 check_ssid = 0;
552
553 if (!wpa && (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
554 /* Only allow wildcard SSID match if an AP
555 * advertises active WPS operation that matches
556 * with our mode. */
557 check_ssid = 1;
558 if (ssid->ssid_len == 0 &&
559 wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
560 check_ssid = 0;
561 }
562 #endif /* CONFIG_WPS */
563
564 if (check_ssid &&
565 (ssid_len != ssid->ssid_len ||
566 os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
567 wpa_dbg(wpa_s, MSG_DEBUG, " skip - SSID mismatch");
568 continue;
569 }
570
571 if (ssid->bssid_set &&
572 os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0) {
573 wpa_dbg(wpa_s, MSG_DEBUG, " skip - BSSID mismatch");
574 continue;
575 }
576
577 if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
578 continue;
579
580 if (!wpa &&
581 !(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
582 !(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
583 !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)) {
584 wpa_dbg(wpa_s, MSG_DEBUG, " skip - non-WPA network "
585 "not allowed");
586 continue;
587 }
588
589 if (!wpa_supplicant_match_privacy(bss, ssid)) {
590 wpa_dbg(wpa_s, MSG_DEBUG, " skip - privacy "
591 "mismatch");
592 continue;
593 }
594
595 if (bss->caps & IEEE80211_CAP_IBSS) {
596 wpa_dbg(wpa_s, MSG_DEBUG, " skip - IBSS (adhoc) "
597 "network");
598 continue;
599 }
600
601 if (!freq_allowed(ssid->freq_list, bss->freq)) {
602 wpa_dbg(wpa_s, MSG_DEBUG, " skip - frequency not "
603 "allowed");
604 continue;
605 }
606
607 #ifdef CONFIG_P2P
608 /*
609 * TODO: skip the AP if its P2P IE has Group Formation
610 * bit set in the P2P Group Capability Bitmap and we
611 * are not in Group Formation with that device.
612 */
613 #endif /* CONFIG_P2P */
614
615 /* Matching configuration found */
616 return ssid;
617 }
618
619 /* No matching configuration found */
620 return NULL;
621 }
622
623
624 static struct wpa_bss *
625 wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s,
626 struct wpa_scan_results *scan_res,
627 struct wpa_ssid *group,
628 struct wpa_ssid **selected_ssid)
629 {
630 size_t i;
631
632 wpa_dbg(wpa_s, MSG_DEBUG, "Selecting BSS from priority group %d",
633 group->priority);
634
635 for (i = 0; i < scan_res->num; i++) {
636 struct wpa_scan_res *bss = scan_res->res[i];
637 const u8 *ie, *ssid;
638 u8 ssid_len;
639
640 *selected_ssid = wpa_scan_res_match(wpa_s, i, bss, group);
641 if (!*selected_ssid)
642 continue;
643
644 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
645 ssid = ie ? ie + 2 : (u8 *) "";
646 ssid_len = ie ? ie[1] : 0;
647
648 wpa_dbg(wpa_s, MSG_DEBUG, " selected BSS " MACSTR
649 " ssid='%s'",
650 MAC2STR(bss->bssid), wpa_ssid_txt(ssid, ssid_len));
651 return wpa_bss_get(wpa_s, bss->bssid, ssid, ssid_len);
652 }
653
654 return NULL;
655 }
656
657
658 static struct wpa_bss *
659 wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,
660 struct wpa_scan_results *scan_res,
661 struct wpa_ssid **selected_ssid)
662 {
663 struct wpa_bss *selected = NULL;
664 int prio;
665
666 while (selected == NULL) {
667 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
668 selected = wpa_supplicant_select_bss(
669 wpa_s, scan_res, wpa_s->conf->pssid[prio],
670 selected_ssid);
671 if (selected)
672 break;
673 }
674
675 if (selected == NULL && wpa_s->blacklist) {
676 wpa_dbg(wpa_s, MSG_DEBUG, "No APs found - clear "
677 "blacklist and try again");
678 wpa_blacklist_clear(wpa_s);
679 wpa_s->blacklist_cleared++;
680 } else if (selected == NULL)
681 break;
682 }
683
684 return selected;
685 }
686
687
688 static void wpa_supplicant_req_new_scan(struct wpa_supplicant *wpa_s,
689 int timeout_sec, int timeout_usec)
690 {
691 if (!wpa_supplicant_enabled_networks(wpa_s->conf)) {
692 /*
693 * No networks are enabled; short-circuit request so
694 * we don't wait timeout seconds before transitioning
695 * to INACTIVE state.
696 */
697 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
698 return;
699 }
700 wpa_supplicant_req_scan(wpa_s, timeout_sec, timeout_usec);
701 }
702
703
704 void wpa_supplicant_connect(struct wpa_supplicant *wpa_s,
705 struct wpa_bss *selected,
706 struct wpa_ssid *ssid)
707 {
708 if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
709 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
710 "PBC session overlap");
711 #ifdef CONFIG_P2P
712 if (wpas_p2p_notif_pbc_overlap(wpa_s) == 1)
713 return;
714 #endif /* CONFIG_P2P */
715
716 #ifdef CONFIG_WPS
717 wpas_wps_cancel(wpa_s);
718 #endif /* CONFIG_WPS */
719 return;
720 }
721
722 /*
723 * Do not trigger new association unless the BSSID has changed or if
724 * reassociation is requested. If we are in process of associating with
725 * the selected BSSID, do not trigger new attempt.
726 */
727 if (wpa_s->reassociate ||
728 (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
729 ((wpa_s->wpa_state != WPA_ASSOCIATING &&
730 wpa_s->wpa_state != WPA_AUTHENTICATING) ||
731 os_memcmp(selected->bssid, wpa_s->pending_bssid, ETH_ALEN) !=
732 0))) {
733 if (wpa_supplicant_scard_init(wpa_s, ssid)) {
734 wpa_supplicant_req_new_scan(wpa_s, 10, 0);
735 return;
736 }
737 wpa_msg(wpa_s, MSG_DEBUG, "Request association: "
738 "reassociate: %d selected: "MACSTR " bssid: " MACSTR
739 " pending: " MACSTR " wpa_state: %s",
740 wpa_s->reassociate, MAC2STR(selected->bssid),
741 MAC2STR(wpa_s->bssid), MAC2STR(wpa_s->pending_bssid),
742 wpa_supplicant_state_txt(wpa_s->wpa_state));
743 wpa_supplicant_associate(wpa_s, selected, ssid);
744 } else {
745 wpa_dbg(wpa_s, MSG_DEBUG, "Already associated with the "
746 "selected AP");
747 }
748 }
749
750
751 static struct wpa_ssid *
752 wpa_supplicant_pick_new_network(struct wpa_supplicant *wpa_s)
753 {
754 int prio;
755 struct wpa_ssid *ssid;
756
757 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
758 for (ssid = wpa_s->conf->pssid[prio]; ssid; ssid = ssid->pnext)
759 {
760 if (ssid->disabled)
761 continue;
762 if (ssid->mode == IEEE80211_MODE_IBSS ||
763 ssid->mode == IEEE80211_MODE_AP)
764 return ssid;
765 }
766 }
767 return NULL;
768 }
769
770
771 /* TODO: move the rsn_preauth_scan_result*() to be called from notify.c based
772 * on BSS added and BSS changed events */
773 static void wpa_supplicant_rsn_preauth_scan_results(
774 struct wpa_supplicant *wpa_s)
775 {
776 struct wpa_bss *bss;
777
778 if (rsn_preauth_scan_results(wpa_s->wpa) < 0)
779 return;
780
781 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
782 const u8 *ssid, *rsn;
783
784 ssid = wpa_bss_get_ie(bss, WLAN_EID_SSID);
785 if (ssid == NULL)
786 continue;
787
788 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
789 if (rsn == NULL)
790 continue;
791
792 rsn_preauth_scan_result(wpa_s->wpa, bss->bssid, ssid, rsn);
793 }
794
795 }
796
797
798 static int wpa_supplicant_need_to_roam(struct wpa_supplicant *wpa_s,
799 struct wpa_bss *selected,
800 struct wpa_ssid *ssid,
801 struct wpa_scan_results *scan_res)
802 {
803 size_t i;
804 struct wpa_scan_res *current_bss = NULL;
805 int min_diff;
806
807 if (wpa_s->reassociate)
808 return 1; /* explicit request to reassociate */
809 if (wpa_s->wpa_state < WPA_ASSOCIATED)
810 return 1; /* we are not associated; continue */
811 if (wpa_s->current_ssid == NULL)
812 return 1; /* unknown current SSID */
813 if (wpa_s->current_ssid != ssid)
814 return 1; /* different network block */
815
816 if (wpas_driver_bss_selection(wpa_s))
817 return 0; /* Driver-based roaming */
818
819 for (i = 0; i < scan_res->num; i++) {
820 struct wpa_scan_res *res = scan_res->res[i];
821 const u8 *ie;
822 if (os_memcmp(res->bssid, wpa_s->bssid, ETH_ALEN) != 0)
823 continue;
824
825 ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
826 if (ie == NULL)
827 continue;
828 if (ie[1] != wpa_s->current_ssid->ssid_len ||
829 os_memcmp(ie + 2, wpa_s->current_ssid->ssid, ie[1]) != 0)
830 continue;
831 current_bss = res;
832 break;
833 }
834
835 if (!current_bss)
836 return 1; /* current BSS not seen in scan results */
837
838 wpa_dbg(wpa_s, MSG_DEBUG, "Considering within-ESS reassociation");
839 wpa_dbg(wpa_s, MSG_DEBUG, "Current BSS: " MACSTR " level=%d",
840 MAC2STR(current_bss->bssid), current_bss->level);
841 wpa_dbg(wpa_s, MSG_DEBUG, "Selected BSS: " MACSTR " level=%d",
842 MAC2STR(selected->bssid), selected->level);
843
844 if (wpa_s->current_ssid->bssid_set &&
845 os_memcmp(selected->bssid, wpa_s->current_ssid->bssid, ETH_ALEN) ==
846 0) {
847 wpa_dbg(wpa_s, MSG_DEBUG, "Allow reassociation - selected BSS "
848 "has preferred BSSID");
849 return 1;
850 }
851
852 min_diff = 2;
853 if (current_bss->level < 0) {
854 if (current_bss->level < -85)
855 min_diff = 1;
856 else if (current_bss->level < -80)
857 min_diff = 2;
858 else if (current_bss->level < -75)
859 min_diff = 3;
860 else if (current_bss->level < -70)
861 min_diff = 4;
862 else
863 min_diff = 5;
864 }
865 if (abs(current_bss->level - selected->level) < min_diff) {
866 wpa_dbg(wpa_s, MSG_DEBUG, "Skip roam - too small difference "
867 "in signal level");
868 return 0;
869 }
870
871 return 1;
872 }
873
874 /* Return < 0 if no scan results could be fetched. */
875 static int _wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
876 union wpa_event_data *data)
877 {
878 struct wpa_bss *selected;
879 struct wpa_ssid *ssid = NULL;
880 struct wpa_scan_results *scan_res;
881 int ap = 0;
882
883 #ifdef CONFIG_AP
884 if (wpa_s->ap_iface)
885 ap = 1;
886 #endif /* CONFIG_AP */
887
888 wpa_supplicant_notify_scanning(wpa_s, 0);
889
890 scan_res = wpa_supplicant_get_scan_results(wpa_s,
891 data ? &data->scan_info :
892 NULL, 1);
893 if (scan_res == NULL) {
894 if (wpa_s->conf->ap_scan == 2 || ap)
895 return -1;
896 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results - try "
897 "scanning again");
898 wpa_supplicant_req_new_scan(wpa_s, 1, 0);
899 return -1;
900 }
901
902 #ifndef CONFIG_NO_RANDOM_POOL
903 size_t i, num;
904 num = scan_res->num;
905 if (num > 10)
906 num = 10;
907 for (i = 0; i < num; i++) {
908 u8 buf[5];
909 struct wpa_scan_res *res = scan_res->res[i];
910 buf[0] = res->bssid[5];
911 buf[1] = res->qual & 0xff;
912 buf[2] = res->noise & 0xff;
913 buf[3] = res->level & 0xff;
914 buf[4] = res->tsf & 0xff;
915 random_add_randomness(buf, sizeof(buf));
916 }
917 #endif /* CONFIG_NO_RANDOM_POOL */
918
919 if (wpa_s->scan_res_handler) {
920 void (*scan_res_handler)(struct wpa_supplicant *wpa_s,
921 struct wpa_scan_results *scan_res);
922
923 scan_res_handler = wpa_s->scan_res_handler;
924 wpa_s->scan_res_handler = NULL;
925 scan_res_handler(wpa_s, scan_res);
926
927 wpa_scan_results_free(scan_res);
928 return 0;
929 }
930
931 if (ap) {
932 wpa_dbg(wpa_s, MSG_DEBUG, "Ignore scan results in AP mode");
933 #ifdef CONFIG_AP
934 if (wpa_s->ap_iface->scan_cb)
935 wpa_s->ap_iface->scan_cb(wpa_s->ap_iface);
936 #endif /* CONFIG_AP */
937 wpa_scan_results_free(scan_res);
938 return 0;
939 }
940
941 wpa_dbg(wpa_s, MSG_DEBUG, "New scan results available");
942 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
943 wpas_notify_scan_results(wpa_s);
944
945 wpas_notify_scan_done(wpa_s, 1);
946
947 if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s))) {
948 wpa_scan_results_free(scan_res);
949 return 0;
950 }
951
952 if (wpa_s->disconnected) {
953 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
954 wpa_scan_results_free(scan_res);
955 return 0;
956 }
957
958 if (!wpas_driver_bss_selection(wpa_s) &&
959 bgscan_notify_scan(wpa_s, scan_res) == 1) {
960 wpa_scan_results_free(scan_res);
961 return 0;
962 }
963
964 selected = wpa_supplicant_pick_network(wpa_s, scan_res, &ssid);
965
966 if (selected) {
967 int skip;
968 skip = !wpa_supplicant_need_to_roam(wpa_s, selected, ssid,
969 scan_res);
970 wpa_scan_results_free(scan_res);
971 if (skip)
972 return 0;
973 wpa_supplicant_connect(wpa_s, selected, ssid);
974 wpa_supplicant_rsn_preauth_scan_results(wpa_s);
975 } else {
976 wpa_scan_results_free(scan_res);
977 wpa_dbg(wpa_s, MSG_DEBUG, "No suitable network found");
978 ssid = wpa_supplicant_pick_new_network(wpa_s);
979 if (ssid) {
980 wpa_dbg(wpa_s, MSG_DEBUG, "Setup a new network");
981 wpa_supplicant_associate(wpa_s, NULL, ssid);
982 wpa_supplicant_rsn_preauth_scan_results(wpa_s);
983 } else {
984 int timeout_sec = wpa_s->scan_interval;
985 int timeout_usec = 0;
986 #ifdef CONFIG_P2P
987 if (wpa_s->p2p_in_provisioning) {
988 /*
989 * Use shorter wait during P2P Provisioning
990 * state to speed up group formation.
991 */
992 timeout_sec = 0;
993 timeout_usec = 250000;
994 }
995 #endif /* CONFIG_P2P */
996 wpa_supplicant_req_new_scan(wpa_s, timeout_sec,
997 timeout_usec);
998 }
999 }
1000 return 0;
1001 }
1002
1003
1004 static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
1005 union wpa_event_data *data)
1006 {
1007 const char *rn, *rn2;
1008 struct wpa_supplicant *ifs;
1009
1010 if (_wpa_supplicant_event_scan_results(wpa_s, data) < 0) {
1011 /*
1012 * If no scan results could be fetched, then no need to
1013 * notify those interfaces that did not actually request
1014 * this scan.
1015 */
1016 return;
1017 }
1018
1019 /*
1020 * Check other interfaces to see if they have the same radio-name. If
1021 * so, they get updated with this same scan info.
1022 */
1023 if (!wpa_s->driver->get_radio_name)
1024 return;
1025
1026 rn = wpa_s->driver->get_radio_name(wpa_s->drv_priv);
1027 if (rn == NULL || rn[0] == '\0')
1028 return;
1029
1030 wpa_dbg(wpa_s, MSG_DEBUG, "Checking for other virtual interfaces "
1031 "sharing same radio (%s) in event_scan_results", rn);
1032
1033 for (ifs = wpa_s->global->ifaces; ifs; ifs = ifs->next) {
1034 if (ifs == wpa_s || !ifs->driver->get_radio_name)
1035 continue;
1036
1037 rn2 = ifs->driver->get_radio_name(ifs->drv_priv);
1038 if (rn2 && os_strcmp(rn, rn2) == 0) {
1039 wpa_printf(MSG_DEBUG, "%s: Updating scan results from "
1040 "sibling", ifs->ifname);
1041 _wpa_supplicant_event_scan_results(ifs, data);
1042 }
1043 }
1044 }
1045
1046 #endif /* CONFIG_NO_SCAN_PROCESSING */
1047
1048
1049 static int wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
1050 union wpa_event_data *data)
1051 {
1052 int l, len, found = 0, wpa_found, rsn_found;
1053 const u8 *p;
1054
1055 wpa_dbg(wpa_s, MSG_DEBUG, "Association info event");
1056 if (data->assoc_info.req_ies)
1057 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
1058 data->assoc_info.req_ies_len);
1059 if (data->assoc_info.resp_ies) {
1060 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
1061 data->assoc_info.resp_ies_len);
1062 #ifdef CONFIG_TDLS
1063 wpa_tdls_assoc_resp_ies(wpa_s->wpa, data->assoc_info.resp_ies,
1064 data->assoc_info.resp_ies_len);
1065 #endif /* CONFIG_TDLS */
1066 }
1067 if (data->assoc_info.beacon_ies)
1068 wpa_hexdump(MSG_DEBUG, "beacon_ies",
1069 data->assoc_info.beacon_ies,
1070 data->assoc_info.beacon_ies_len);
1071 if (data->assoc_info.freq)
1072 wpa_dbg(wpa_s, MSG_DEBUG, "freq=%u MHz",
1073 data->assoc_info.freq);
1074
1075 p = data->assoc_info.req_ies;
1076 l = data->assoc_info.req_ies_len;
1077
1078 /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
1079 while (p && l >= 2) {
1080 len = p[1] + 2;
1081 if (len > l) {
1082 wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
1083 p, l);
1084 break;
1085 }
1086 if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
1087 (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
1088 (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
1089 if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
1090 break;
1091 found = 1;
1092 wpa_find_assoc_pmkid(wpa_s);
1093 break;
1094 }
1095 l -= len;
1096 p += len;
1097 }
1098 if (!found && data->assoc_info.req_ies)
1099 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1100
1101 #ifdef CONFIG_IEEE80211R
1102 #ifdef CONFIG_SME
1103 if (wpa_s->sme.auth_alg == WPA_AUTH_ALG_FT) {
1104 u8 bssid[ETH_ALEN];
1105 if (wpa_drv_get_bssid(wpa_s, bssid) < 0 ||
1106 wpa_ft_validate_reassoc_resp(wpa_s->wpa,
1107 data->assoc_info.resp_ies,
1108 data->assoc_info.resp_ies_len,
1109 bssid) < 0) {
1110 wpa_dbg(wpa_s, MSG_DEBUG, "FT: Validation of "
1111 "Reassociation Response failed");
1112 wpa_supplicant_deauthenticate(
1113 wpa_s, WLAN_REASON_INVALID_IE);
1114 return -1;
1115 }
1116 }
1117
1118 p = data->assoc_info.resp_ies;
1119 l = data->assoc_info.resp_ies_len;
1120
1121 #ifdef CONFIG_WPS_STRICT
1122 if (p && wpa_s->current_ssid &&
1123 wpa_s->current_ssid->key_mgmt == WPA_KEY_MGMT_WPS) {
1124 struct wpabuf *wps;
1125 wps = ieee802_11_vendor_ie_concat(p, l, WPS_IE_VENDOR_TYPE);
1126 if (wps == NULL) {
1127 wpa_msg(wpa_s, MSG_INFO, "WPS-STRICT: AP did not "
1128 "include WPS IE in (Re)Association Response");
1129 return -1;
1130 }
1131
1132 if (wps_validate_assoc_resp(wps) < 0) {
1133 wpabuf_free(wps);
1134 wpa_supplicant_deauthenticate(
1135 wpa_s, WLAN_REASON_INVALID_IE);
1136 return -1;
1137 }
1138 wpabuf_free(wps);
1139 }
1140 #endif /* CONFIG_WPS_STRICT */
1141
1142 /* Go through the IEs and make a copy of the MDIE, if present. */
1143 while (p && l >= 2) {
1144 len = p[1] + 2;
1145 if (len > l) {
1146 wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
1147 p, l);
1148 break;
1149 }
1150 if (p[0] == WLAN_EID_MOBILITY_DOMAIN &&
1151 p[1] >= MOBILITY_DOMAIN_ID_LEN) {
1152 wpa_s->sme.ft_used = 1;
1153 os_memcpy(wpa_s->sme.mobility_domain, p + 2,
1154 MOBILITY_DOMAIN_ID_LEN);
1155 break;
1156 }
1157 l -= len;
1158 p += len;
1159 }
1160 #endif /* CONFIG_SME */
1161
1162 wpa_sm_set_ft_params(wpa_s->wpa, data->assoc_info.resp_ies,
1163 data->assoc_info.resp_ies_len);
1164 #endif /* CONFIG_IEEE80211R */
1165
1166 /* WPA/RSN IE from Beacon/ProbeResp */
1167 p = data->assoc_info.beacon_ies;
1168 l = data->assoc_info.beacon_ies_len;
1169
1170 /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
1171 */
1172 wpa_found = rsn_found = 0;
1173 while (p && l >= 2) {
1174 len = p[1] + 2;
1175 if (len > l) {
1176 wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
1177 p, l);
1178 break;
1179 }
1180 if (!wpa_found &&
1181 p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
1182 os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
1183 wpa_found = 1;
1184 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
1185 }
1186
1187 if (!rsn_found &&
1188 p[0] == WLAN_EID_RSN && p[1] >= 2) {
1189 rsn_found = 1;
1190 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
1191 }
1192
1193 l -= len;
1194 p += len;
1195 }
1196
1197 if (!wpa_found && data->assoc_info.beacon_ies)
1198 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
1199 if (!rsn_found && data->assoc_info.beacon_ies)
1200 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
1201 if (wpa_found || rsn_found)
1202 wpa_s->ap_ies_from_associnfo = 1;
1203
1204 if (wpa_s->assoc_freq && data->assoc_info.freq &&
1205 wpa_s->assoc_freq != data->assoc_info.freq) {
1206 wpa_printf(MSG_DEBUG, "Operating frequency changed from "
1207 "%u to %u MHz",
1208 wpa_s->assoc_freq, data->assoc_info.freq);
1209 wpa_supplicant_update_scan_results(wpa_s);
1210 }
1211
1212 wpa_s->assoc_freq = data->assoc_info.freq;
1213
1214 return 0;
1215 }
1216
1217
1218 static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
1219 union wpa_event_data *data)
1220 {
1221 u8 bssid[ETH_ALEN];
1222 int ft_completed;
1223 int bssid_changed;
1224 struct wpa_driver_capa capa;
1225
1226 #ifdef CONFIG_AP
1227 if (wpa_s->ap_iface) {
1228 hostapd_notif_assoc(wpa_s->ap_iface->bss[0],
1229 data->assoc_info.addr,
1230 data->assoc_info.req_ies,
1231 data->assoc_info.req_ies_len,
1232 data->assoc_info.reassoc);
1233 return;
1234 }
1235 #endif /* CONFIG_AP */
1236
1237 ft_completed = wpa_ft_is_completed(wpa_s->wpa);
1238 if (data && wpa_supplicant_event_associnfo(wpa_s, data) < 0)
1239 return;
1240
1241 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
1242 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1243 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
1244 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) ||
1245 (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
1246 os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
1247 wpa_dbg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
1248 MACSTR, MAC2STR(bssid));
1249 random_add_randomness(bssid, ETH_ALEN);
1250 bssid_changed = os_memcmp(wpa_s->bssid, bssid, ETH_ALEN);
1251 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
1252 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1253 if (bssid_changed)
1254 wpas_notify_bssid_changed(wpa_s);
1255
1256 if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
1257 wpa_clear_keys(wpa_s, bssid);
1258 }
1259 if (wpa_supplicant_select_config(wpa_s) < 0) {
1260 wpa_supplicant_disassociate(
1261 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1262 return;
1263 }
1264 if (wpa_s->current_ssid) {
1265 struct wpa_bss *bss = NULL;
1266 struct wpa_ssid *ssid = wpa_s->current_ssid;
1267 if (ssid->ssid_len > 0)
1268 bss = wpa_bss_get(wpa_s, bssid,
1269 ssid->ssid, ssid->ssid_len);
1270 if (!bss)
1271 bss = wpa_bss_get_bssid(wpa_s, bssid);
1272 if (bss)
1273 wpa_s->current_bss = bss;
1274 }
1275 }
1276
1277 #ifdef CONFIG_SME
1278 os_memcpy(wpa_s->sme.prev_bssid, bssid, ETH_ALEN);
1279 wpa_s->sme.prev_bssid_set = 1;
1280 #endif /* CONFIG_SME */
1281
1282 wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
1283 if (wpa_s->current_ssid) {
1284 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
1285 * initialized before association, but for other modes,
1286 * initialize PC/SC here, if the current configuration needs
1287 * smartcard or SIM/USIM. */
1288 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
1289 }
1290 wpa_sm_notify_assoc(wpa_s->wpa, bssid);
1291 if (wpa_s->l2)
1292 l2_packet_notify_auth_start(wpa_s->l2);
1293
1294 /*
1295 * Set portEnabled first to FALSE in order to get EAP state machine out
1296 * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
1297 * state machine may transit to AUTHENTICATING state based on obsolete
1298 * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
1299 * AUTHENTICATED without ever giving chance to EAP state machine to
1300 * reset the state.
1301 */
1302 if (!ft_completed) {
1303 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
1304 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
1305 }
1306 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
1307 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
1308 /* 802.1X::portControl = Auto */
1309 eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
1310 wpa_s->eapol_received = 0;
1311 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1312 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE ||
1313 (wpa_s->current_ssid &&
1314 wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS)) {
1315 wpa_supplicant_cancel_auth_timeout(wpa_s);
1316 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1317 } else if (!ft_completed) {
1318 /* Timeout for receiving the first EAPOL packet */
1319 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
1320 }
1321 wpa_supplicant_cancel_scan(wpa_s);
1322
1323 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1324 wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1325 /*
1326 * We are done; the driver will take care of RSN 4-way
1327 * handshake.
1328 */
1329 wpa_supplicant_cancel_auth_timeout(wpa_s);
1330 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1331 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1332 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
1333 } else if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1334 wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
1335 /*
1336 * The driver will take care of RSN 4-way handshake, so we need
1337 * to allow EAPOL supplicant to complete its work without
1338 * waiting for WPA supplicant.
1339 */
1340 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1341 } else if (ft_completed) {
1342 /*
1343 * FT protocol completed - make sure EAPOL state machine ends
1344 * up in authenticated.
1345 */
1346 wpa_supplicant_cancel_auth_timeout(wpa_s);
1347 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1348 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1349 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
1350 }
1351
1352 if (wpa_s->pending_eapol_rx) {
1353 struct os_time now, age;
1354 os_get_time(&now);
1355 os_time_sub(&now, &wpa_s->pending_eapol_rx_time, &age);
1356 if (age.sec == 0 && age.usec < 100000 &&
1357 os_memcmp(wpa_s->pending_eapol_rx_src, bssid, ETH_ALEN) ==
1358 0) {
1359 wpa_dbg(wpa_s, MSG_DEBUG, "Process pending EAPOL "
1360 "frame that was received just before "
1361 "association notification");
1362 wpa_supplicant_rx_eapol(
1363 wpa_s, wpa_s->pending_eapol_rx_src,
1364 wpabuf_head(wpa_s->pending_eapol_rx),
1365 wpabuf_len(wpa_s->pending_eapol_rx));
1366 }
1367 wpabuf_free(wpa_s->pending_eapol_rx);
1368 wpa_s->pending_eapol_rx = NULL;
1369 }
1370
1371 if ((wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1372 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
1373 wpa_s->current_ssid && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1374 capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE) {
1375 /* Set static WEP keys again */
1376 wpa_set_wep_keys(wpa_s, wpa_s->current_ssid);
1377 }
1378
1379 #ifdef CONFIG_IBSS_RSN
1380 if (wpa_s->current_ssid &&
1381 wpa_s->current_ssid->mode == WPAS_MODE_IBSS &&
1382 wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
1383 wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE &&
1384 wpa_s->ibss_rsn == NULL) {
1385 wpa_s->ibss_rsn = ibss_rsn_init(wpa_s);
1386 if (!wpa_s->ibss_rsn) {
1387 wpa_msg(wpa_s, MSG_INFO, "Failed to init IBSS RSN");
1388 wpa_supplicant_deauthenticate(
1389 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1390 return;
1391 }
1392
1393 ibss_rsn_set_psk(wpa_s->ibss_rsn, wpa_s->current_ssid->psk);
1394 }
1395 #endif /* CONFIG_IBSS_RSN */
1396 }
1397
1398
1399 static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s,
1400 u16 reason_code)
1401 {
1402 const u8 *bssid;
1403 int authenticating;
1404 u8 prev_pending_bssid[ETH_ALEN];
1405
1406 authenticating = wpa_s->wpa_state == WPA_AUTHENTICATING;
1407 os_memcpy(prev_pending_bssid, wpa_s->pending_bssid, ETH_ALEN);
1408
1409 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1410 /*
1411 * At least Host AP driver and a Prism3 card seemed to be
1412 * generating streams of disconnected events when configuring
1413 * IBSS for WPA-None. Ignore them for now.
1414 */
1415 wpa_dbg(wpa_s, MSG_DEBUG, "Disconnect event - ignore in "
1416 "IBSS/WPA-None mode");
1417 return;
1418 }
1419
1420 if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
1421 wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1422 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
1423 "pre-shared key may be incorrect");
1424 }
1425 if (!wpa_s->auto_reconnect_disabled ||
1426 wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) {
1427 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Auto connect enabled: try to "
1428 "reconnect (wps=%d)",
1429 wpa_s->key_mgmt == WPA_KEY_MGMT_WPS);
1430 if (wpa_s->wpa_state >= WPA_ASSOCIATING)
1431 wpa_supplicant_req_scan(wpa_s, 0, 100000);
1432 } else {
1433 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Auto connect disabled: do not "
1434 "try to re-connect");
1435 wpa_s->reassociate = 0;
1436 wpa_s->disconnected = 1;
1437 }
1438 bssid = wpa_s->bssid;
1439 if (is_zero_ether_addr(bssid))
1440 bssid = wpa_s->pending_bssid;
1441 wpas_connection_failed(wpa_s, bssid);
1442 wpa_sm_notify_disassoc(wpa_s->wpa);
1443 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid=" MACSTR
1444 " reason=%d",
1445 MAC2STR(bssid), reason_code);
1446 if (wpa_supplicant_dynamic_keys(wpa_s)) {
1447 wpa_dbg(wpa_s, MSG_DEBUG, "Disconnect event - remove keys");
1448 wpa_s->keys_cleared = 0;
1449 wpa_clear_keys(wpa_s, wpa_s->bssid);
1450 }
1451 wpa_supplicant_mark_disassoc(wpa_s);
1452
1453 if (authenticating && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
1454 sme_disassoc_while_authenticating(wpa_s, prev_pending_bssid);
1455 }
1456
1457
1458 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1459 static void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx,
1460 void *sock_ctx)
1461 {
1462 struct wpa_supplicant *wpa_s = eloop_ctx;
1463
1464 if (!wpa_s->pending_mic_error_report)
1465 return;
1466
1467 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Sending pending MIC error report");
1468 wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
1469 wpa_s->pending_mic_error_report = 0;
1470 }
1471 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1472
1473
1474 static void
1475 wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
1476 union wpa_event_data *data)
1477 {
1478 int pairwise;
1479 struct os_time t;
1480
1481 wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
1482 pairwise = (data && data->michael_mic_failure.unicast);
1483 os_get_time(&t);
1484 if ((wpa_s->last_michael_mic_error &&
1485 t.sec - wpa_s->last_michael_mic_error <= 60) ||
1486 wpa_s->pending_mic_error_report) {
1487 if (wpa_s->pending_mic_error_report) {
1488 /*
1489 * Send the pending MIC error report immediately since
1490 * we are going to start countermeasures and AP better
1491 * do the same.
1492 */
1493 wpa_sm_key_request(wpa_s->wpa, 1,
1494 wpa_s->pending_mic_error_pairwise);
1495 }
1496
1497 /* Send the new MIC error report immediately since we are going
1498 * to start countermeasures and AP better do the same.
1499 */
1500 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1501
1502 /* initialize countermeasures */
1503 wpa_s->countermeasures = 1;
1504 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
1505
1506 /*
1507 * Need to wait for completion of request frame. We do not get
1508 * any callback for the message completion, so just wait a
1509 * short while and hope for the best. */
1510 os_sleep(0, 10000);
1511
1512 wpa_drv_set_countermeasures(wpa_s, 1);
1513 wpa_supplicant_deauthenticate(wpa_s,
1514 WLAN_REASON_MICHAEL_MIC_FAILURE);
1515 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
1516 wpa_s, NULL);
1517 eloop_register_timeout(60, 0,
1518 wpa_supplicant_stop_countermeasures,
1519 wpa_s, NULL);
1520 /* TODO: mark the AP rejected for 60 second. STA is
1521 * allowed to associate with another AP.. */
1522 } else {
1523 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1524 if (wpa_s->mic_errors_seen) {
1525 /*
1526 * Reduce the effectiveness of Michael MIC error
1527 * reports as a means for attacking against TKIP if
1528 * more than one MIC failure is noticed with the same
1529 * PTK. We delay the transmission of the reports by a
1530 * random time between 0 and 60 seconds in order to
1531 * force the attacker wait 60 seconds before getting
1532 * the information on whether a frame resulted in a MIC
1533 * failure.
1534 */
1535 u8 rval[4];
1536 int sec;
1537
1538 if (os_get_random(rval, sizeof(rval)) < 0)
1539 sec = os_random() % 60;
1540 else
1541 sec = WPA_GET_BE32(rval) % 60;
1542 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Delay MIC error "
1543 "report %d seconds", sec);
1544 wpa_s->pending_mic_error_report = 1;
1545 wpa_s->pending_mic_error_pairwise = pairwise;
1546 eloop_cancel_timeout(
1547 wpa_supplicant_delayed_mic_error_report,
1548 wpa_s, NULL);
1549 eloop_register_timeout(
1550 sec, os_random() % 1000000,
1551 wpa_supplicant_delayed_mic_error_report,
1552 wpa_s, NULL);
1553 } else {
1554 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1555 }
1556 #else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1557 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1558 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1559 }
1560 wpa_s->last_michael_mic_error = t.sec;
1561 wpa_s->mic_errors_seen++;
1562 }
1563
1564
1565 #ifdef CONFIG_TERMINATE_ONLASTIF
1566 static int any_interfaces(struct wpa_supplicant *head)
1567 {
1568 struct wpa_supplicant *wpa_s;
1569
1570 for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
1571 if (!wpa_s->interface_removed)
1572 return 1;
1573 return 0;
1574 }
1575 #endif /* CONFIG_TERMINATE_ONLASTIF */
1576
1577
1578 static void
1579 wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
1580 union wpa_event_data *data)
1581 {
1582 if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
1583 return;
1584
1585 switch (data->interface_status.ievent) {
1586 case EVENT_INTERFACE_ADDED:
1587 if (!wpa_s->interface_removed)
1588 break;
1589 wpa_s->interface_removed = 0;
1590 wpa_dbg(wpa_s, MSG_DEBUG, "Configured interface was added");
1591 if (wpa_supplicant_driver_init(wpa_s) < 0) {
1592 wpa_msg(wpa_s, MSG_INFO, "Failed to initialize the "
1593 "driver after interface was added");
1594 }
1595 break;
1596 case EVENT_INTERFACE_REMOVED:
1597 wpa_dbg(wpa_s, MSG_DEBUG, "Configured interface was removed");
1598 wpa_s->interface_removed = 1;
1599 wpa_supplicant_mark_disassoc(wpa_s);
1600 l2_packet_deinit(wpa_s->l2);
1601 wpa_s->l2 = NULL;
1602 #ifdef CONFIG_IBSS_RSN
1603 ibss_rsn_deinit(wpa_s->ibss_rsn);
1604 wpa_s->ibss_rsn = NULL;
1605 #endif /* CONFIG_IBSS_RSN */
1606 #ifdef CONFIG_TERMINATE_ONLASTIF
1607 /* check if last interface */
1608 if (!any_interfaces(wpa_s->global->ifaces))
1609 eloop_terminate();
1610 #endif /* CONFIG_TERMINATE_ONLASTIF */
1611 break;
1612 }
1613 }
1614
1615
1616 #ifdef CONFIG_PEERKEY
1617 static void
1618 wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
1619 union wpa_event_data *data)
1620 {
1621 if (data == NULL)
1622 return;
1623 wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
1624 }
1625 #endif /* CONFIG_PEERKEY */
1626
1627
1628 #ifdef CONFIG_TDLS
1629 static void wpa_supplicant_event_tdls(struct wpa_supplicant *wpa_s,
1630 union wpa_event_data *data)
1631 {
1632 if (data == NULL)
1633 return;
1634 switch (data->tdls.oper) {
1635 case TDLS_REQUEST_SETUP:
1636 wpa_tdls_start(wpa_s->wpa, data->tdls.peer);
1637 break;
1638 case TDLS_REQUEST_TEARDOWN:
1639 /* request from driver to add FTIE */
1640 wpa_tdls_recv_teardown_notify(wpa_s->wpa, data->tdls.peer,
1641 data->tdls.reason_code);
1642 break;
1643 }
1644 }
1645 #endif /* CONFIG_TDLS */
1646
1647
1648 #ifdef CONFIG_IEEE80211R
1649 static void
1650 wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
1651 union wpa_event_data *data)
1652 {
1653 if (data == NULL)
1654 return;
1655
1656 if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
1657 data->ft_ies.ies_len,
1658 data->ft_ies.ft_action,
1659 data->ft_ies.target_ap,
1660 data->ft_ies.ric_ies,
1661 data->ft_ies.ric_ies_len) < 0) {
1662 /* TODO: prevent MLME/driver from trying to associate? */
1663 }
1664 }
1665 #endif /* CONFIG_IEEE80211R */
1666
1667
1668 #ifdef CONFIG_IBSS_RSN
1669 static void wpa_supplicant_event_ibss_rsn_start(struct wpa_supplicant *wpa_s,
1670 union wpa_event_data *data)
1671 {
1672 struct wpa_ssid *ssid;
1673 if (wpa_s->wpa_state < WPA_ASSOCIATED)
1674 return;
1675 if (data == NULL)
1676 return;
1677 ssid = wpa_s->current_ssid;
1678 if (ssid == NULL)
1679 return;
1680 if (ssid->mode != WPAS_MODE_IBSS || !wpa_key_mgmt_wpa(ssid->key_mgmt))
1681 return;
1682
1683 ibss_rsn_start(wpa_s->ibss_rsn, data->ibss_rsn_start.peer);
1684 }
1685 #endif /* CONFIG_IBSS_RSN */
1686
1687
1688 #ifdef CONFIG_IEEE80211R
1689 static void ft_rx_action(struct wpa_supplicant *wpa_s, const u8 *data,
1690 size_t len)
1691 {
1692 const u8 *sta_addr, *target_ap_addr;
1693 u16 status;
1694
1695 wpa_hexdump(MSG_MSGDUMP, "FT: RX Action", data, len);
1696 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
1697 return; /* only SME case supported for now */
1698 if (len < 1 + 2 * ETH_ALEN + 2)
1699 return;
1700 if (data[0] != 2)
1701 return; /* Only FT Action Response is supported for now */
1702 sta_addr = data + 1;
1703 target_ap_addr = data + 1 + ETH_ALEN;
1704 status = WPA_GET_LE16(data + 1 + 2 * ETH_ALEN);
1705 wpa_dbg(wpa_s, MSG_DEBUG, "FT: Received FT Action Response: STA "
1706 MACSTR " TargetAP " MACSTR " status %u",
1707 MAC2STR(sta_addr), MAC2STR(target_ap_addr), status);
1708
1709 if (os_memcmp(sta_addr, wpa_s->own_addr, ETH_ALEN) != 0) {
1710 wpa_dbg(wpa_s, MSG_DEBUG, "FT: Foreign STA Address " MACSTR
1711 " in FT Action Response", MAC2STR(sta_addr));
1712 return;
1713 }
1714
1715 if (status) {
1716 wpa_dbg(wpa_s, MSG_DEBUG, "FT: FT Action Response indicates "
1717 "failure (status code %d)", status);
1718 /* TODO: report error to FT code(?) */
1719 return;
1720 }
1721
1722 if (wpa_ft_process_response(wpa_s->wpa, data + 1 + 2 * ETH_ALEN + 2,
1723 len - (1 + 2 * ETH_ALEN + 2), 1,
1724 target_ap_addr, NULL, 0) < 0)
1725 return;
1726
1727 #ifdef CONFIG_SME
1728 {
1729 struct wpa_bss *bss;
1730 bss = wpa_bss_get_bssid(wpa_s, target_ap_addr);
1731 if (bss)
1732 wpa_s->sme.freq = bss->freq;
1733 wpa_s->sme.auth_alg = WPA_AUTH_ALG_FT;
1734 sme_associate(wpa_s, WPAS_MODE_INFRA, target_ap_addr,
1735 WLAN_AUTH_FT);
1736 }
1737 #endif /* CONFIG_SME */
1738 }
1739 #endif /* CONFIG_IEEE80211R */
1740
1741
1742 static void wpa_supplicant_event_unprot_deauth(struct wpa_supplicant *wpa_s,
1743 struct unprot_deauth *e)
1744 {
1745 #ifdef CONFIG_IEEE80211W
1746 wpa_printf(MSG_DEBUG, "Unprotected Deauthentication frame "
1747 "dropped: " MACSTR " -> " MACSTR
1748 " (reason code %u)",
1749 MAC2STR(e->sa), MAC2STR(e->da), e->reason_code);
1750 sme_event_unprot_disconnect(wpa_s, e->sa, e->da, e->reason_code);
1751 #endif /* CONFIG_IEEE80211W */
1752 }
1753
1754
1755 static void wpa_supplicant_event_unprot_disassoc(struct wpa_supplicant *wpa_s,
1756 struct unprot_disassoc *e)
1757 {
1758 #ifdef CONFIG_IEEE80211W
1759 wpa_printf(MSG_DEBUG, "Unprotected Disassociation frame "
1760 "dropped: " MACSTR " -> " MACSTR
1761 " (reason code %u)",
1762 MAC2STR(e->sa), MAC2STR(e->da), e->reason_code);
1763 sme_event_unprot_disconnect(wpa_s, e->sa, e->da, e->reason_code);
1764 #endif /* CONFIG_IEEE80211W */
1765 }
1766
1767
1768 void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
1769 union wpa_event_data *data)
1770 {
1771 struct wpa_supplicant *wpa_s = ctx;
1772 u16 reason_code = 0;
1773
1774 if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED &&
1775 event != EVENT_INTERFACE_ENABLED &&
1776 event != EVENT_INTERFACE_STATUS) {
1777 wpa_dbg(wpa_s, MSG_DEBUG, "Ignore event %d while interface is "
1778 "disabled", event);
1779 return;
1780 }
1781
1782 wpa_dbg(wpa_s, MSG_DEBUG, "Event %d received on interface %s",
1783 event, wpa_s->ifname);
1784
1785 switch (event) {
1786 case EVENT_AUTH:
1787 sme_event_auth(wpa_s, data);
1788 break;
1789 case EVENT_ASSOC:
1790 wpa_supplicant_event_assoc(wpa_s, data);
1791 break;
1792 case EVENT_DISASSOC:
1793 wpa_dbg(wpa_s, MSG_DEBUG, "Disassociation notification");
1794 if (data) {
1795 wpa_dbg(wpa_s, MSG_DEBUG, " * reason %u",
1796 data->disassoc_info.reason_code);
1797 if (data->disassoc_info.addr)
1798 wpa_dbg(wpa_s, MSG_DEBUG, " * address " MACSTR,
1799 MAC2STR(data->disassoc_info.addr));
1800 }
1801 #ifdef CONFIG_AP
1802 if (wpa_s->ap_iface && data && data->disassoc_info.addr) {
1803 hostapd_notif_disassoc(wpa_s->ap_iface->bss[0],
1804 data->disassoc_info.addr);
1805 break;
1806 }
1807 #endif /* CONFIG_AP */
1808 if (data) {
1809 reason_code = data->disassoc_info.reason_code;
1810 wpa_hexdump(MSG_DEBUG, "Disassociation frame IE(s)",
1811 data->disassoc_info.ie,
1812 data->disassoc_info.ie_len);
1813 #ifdef CONFIG_P2P
1814 wpas_p2p_disassoc_notif(
1815 wpa_s, data->disassoc_info.addr, reason_code,
1816 data->disassoc_info.ie,
1817 data->disassoc_info.ie_len);
1818 #endif /* CONFIG_P2P */
1819 }
1820 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
1821 sme_event_disassoc(wpa_s, data);
1822 /* fall through */
1823 case EVENT_DEAUTH:
1824 if (event == EVENT_DEAUTH) {
1825 wpa_dbg(wpa_s, MSG_DEBUG,
1826 "Deauthentication notification");
1827 if (data) {
1828 reason_code = data->deauth_info.reason_code;
1829 wpa_dbg(wpa_s, MSG_DEBUG, " * reason %u",
1830 data->deauth_info.reason_code);
1831 if (data->deauth_info.addr) {
1832 wpa_dbg(wpa_s, MSG_DEBUG, " * address "
1833 MACSTR,
1834 MAC2STR(data->deauth_info.
1835 addr));
1836 }
1837 wpa_hexdump(MSG_DEBUG,
1838 "Deauthentication frame IE(s)",
1839 data->deauth_info.ie,
1840 data->deauth_info.ie_len);
1841 #ifdef CONFIG_P2P
1842 wpas_p2p_deauth_notif(
1843 wpa_s, data->deauth_info.addr,
1844 reason_code,
1845 data->deauth_info.ie,
1846 data->deauth_info.ie_len);
1847 #endif /* CONFIG_P2P */
1848 }
1849 }
1850 #ifdef CONFIG_AP
1851 if (wpa_s->ap_iface && data && data->deauth_info.addr) {
1852 hostapd_notif_disassoc(wpa_s->ap_iface->bss[0],
1853 data->deauth_info.addr);
1854 break;
1855 }
1856 #endif /* CONFIG_AP */
1857 wpa_supplicant_event_disassoc(wpa_s, reason_code);
1858 break;
1859 case EVENT_MICHAEL_MIC_FAILURE:
1860 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
1861 break;
1862 #ifndef CONFIG_NO_SCAN_PROCESSING
1863 case EVENT_SCAN_RESULTS:
1864 wpa_supplicant_event_scan_results(wpa_s, data);
1865 break;
1866 #endif /* CONFIG_NO_SCAN_PROCESSING */
1867 case EVENT_ASSOCINFO:
1868 wpa_supplicant_event_associnfo(wpa_s, data);
1869 break;
1870 case EVENT_INTERFACE_STATUS:
1871 wpa_supplicant_event_interface_status(wpa_s, data);
1872 break;
1873 case EVENT_PMKID_CANDIDATE:
1874 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
1875 break;
1876 #ifdef CONFIG_PEERKEY
1877 case EVENT_STKSTART:
1878 wpa_supplicant_event_stkstart(wpa_s, data);
1879 break;
1880 #endif /* CONFIG_PEERKEY */
1881 #ifdef CONFIG_TDLS
1882 case EVENT_TDLS:
1883 wpa_supplicant_event_tdls(wpa_s, data);
1884 break;
1885 #endif /* CONFIG_TDLS */
1886 #ifdef CONFIG_IEEE80211R
1887 case EVENT_FT_RESPONSE:
1888 wpa_supplicant_event_ft_response(wpa_s, data);
1889 break;
1890 #endif /* CONFIG_IEEE80211R */
1891 #ifdef CONFIG_IBSS_RSN
1892 case EVENT_IBSS_RSN_START:
1893 wpa_supplicant_event_ibss_rsn_start(wpa_s, data);
1894 break;
1895 #endif /* CONFIG_IBSS_RSN */
1896 case EVENT_ASSOC_REJECT:
1897 if (data->assoc_reject.bssid)
1898 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_ASSOC_REJECT
1899 "bssid=" MACSTR " status_code=%u",
1900 MAC2STR(data->assoc_reject.bssid),
1901 data->assoc_reject.status_code);
1902 else
1903 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_ASSOC_REJECT
1904 "status_code=%u",
1905 data->assoc_reject.status_code);
1906 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
1907 sme_event_assoc_reject(wpa_s, data);
1908 break;
1909 case EVENT_AUTH_TIMED_OUT:
1910 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
1911 sme_event_auth_timed_out(wpa_s, data);
1912 break;
1913 case EVENT_ASSOC_TIMED_OUT:
1914 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
1915 sme_event_assoc_timed_out(wpa_s, data);
1916 break;
1917 #ifdef CONFIG_AP
1918 case EVENT_TX_STATUS:
1919 wpa_dbg(wpa_s, MSG_DEBUG, "EVENT_TX_STATUS dst=" MACSTR
1920 " type=%d stype=%d",
1921 MAC2STR(data->tx_status.dst),
1922 data->tx_status.type, data->tx_status.stype);
1923 if (wpa_s->ap_iface == NULL) {
1924 #ifdef CONFIG_P2P
1925 if (data->tx_status.type == WLAN_FC_TYPE_MGMT &&
1926 data->tx_status.stype == WLAN_FC_STYPE_ACTION)
1927 wpas_send_action_tx_status(
1928 wpa_s, data->tx_status.dst,
1929 data->tx_status.data,
1930 data->tx_status.data_len,
1931 data->tx_status.ack ?
1932 P2P_SEND_ACTION_SUCCESS :
1933 P2P_SEND_ACTION_NO_ACK);
1934 #endif /* CONFIG_P2P */
1935 break;
1936 }
1937 #ifdef CONFIG_P2P
1938 wpa_dbg(wpa_s, MSG_DEBUG, "EVENT_TX_STATUS pending_dst="
1939 MACSTR, MAC2STR(wpa_s->parent->pending_action_dst));
1940 /*
1941 * Catch TX status events for Action frames we sent via group
1942 * interface in GO mode.
1943 */
1944 if (data->tx_status.type == WLAN_FC_TYPE_MGMT &&
1945 data->tx_status.stype == WLAN_FC_STYPE_ACTION &&
1946 os_memcmp(wpa_s->parent->pending_action_dst,
1947 data->tx_status.dst, ETH_ALEN) == 0) {
1948 wpas_send_action_tx_status(
1949 wpa_s->parent, data->tx_status.dst,
1950 data->tx_status.data,
1951 data->tx_status.data_len,
1952 data->tx_status.ack ?
1953 P2P_SEND_ACTION_SUCCESS :
1954 P2P_SEND_ACTION_NO_ACK);
1955 break;
1956 }
1957 #endif /* CONFIG_P2P */
1958 switch (data->tx_status.type) {
1959 case WLAN_FC_TYPE_MGMT:
1960 ap_mgmt_tx_cb(wpa_s, data->tx_status.data,
1961 data->tx_status.data_len,
1962 data->tx_status.stype,
1963 data->tx_status.ack);
1964 break;
1965 case WLAN_FC_TYPE_DATA:
1966 ap_tx_status(wpa_s, data->tx_status.dst,
1967 data->tx_status.data,
1968 data->tx_status.data_len,
1969 data->tx_status.ack);
1970 break;
1971 }
1972 break;
1973 case EVENT_RX_FROM_UNKNOWN:
1974 if (wpa_s->ap_iface == NULL)
1975 break;
1976 ap_rx_from_unknown_sta(wpa_s, data->rx_from_unknown.frame,
1977 data->rx_from_unknown.len);
1978 break;
1979 case EVENT_RX_MGMT:
1980 if (wpa_s->ap_iface == NULL) {
1981 #ifdef CONFIG_P2P
1982 u16 fc, stype;
1983 const struct ieee80211_mgmt *mgmt;
1984 mgmt = (const struct ieee80211_mgmt *)
1985 data->rx_mgmt.frame;
1986 fc = le_to_host16(mgmt->frame_control);
1987 stype = WLAN_FC_GET_STYPE(fc);
1988 if (stype == WLAN_FC_STYPE_PROBE_REQ &&
1989 data->rx_mgmt.frame_len > 24) {
1990 const u8 *src = mgmt->sa;
1991 const u8 *ie = mgmt->u.probe_req.variable;
1992 size_t ie_len = data->rx_mgmt.frame_len -
1993 (mgmt->u.probe_req.variable -
1994 data->rx_mgmt.frame);
1995 wpas_p2p_probe_req_rx(wpa_s, src, mgmt->da,
1996 mgmt->bssid, ie, ie_len);
1997 break;
1998 }
1999 #endif /* CONFIG_P2P */
2000 wpa_dbg(wpa_s, MSG_DEBUG, "AP: ignore received "
2001 "management frame in non-AP mode");
2002 break;
2003 }
2004 ap_mgmt_rx(wpa_s, &data->rx_mgmt);
2005 break;
2006 #endif /* CONFIG_AP */
2007 case EVENT_RX_ACTION:
2008 wpa_dbg(wpa_s, MSG_DEBUG, "Received Action frame: SA=" MACSTR
2009 " Category=%u DataLen=%d freq=%d MHz",
2010 MAC2STR(data->rx_action.sa),
2011 data->rx_action.category, (int) data->rx_action.len,
2012 data->rx_action.freq);
2013 #ifdef CONFIG_IEEE80211R
2014 if (data->rx_action.category == WLAN_ACTION_FT) {
2015 ft_rx_action(wpa_s, data->rx_action.data,
2016 data->rx_action.len);
2017 break;
2018 }
2019 #endif /* CONFIG_IEEE80211R */
2020 #ifdef CONFIG_IEEE80211W
2021 #ifdef CONFIG_SME
2022 if (data->rx_action.category == WLAN_ACTION_SA_QUERY) {
2023 sme_sa_query_rx(wpa_s, data->rx_action.sa,
2024 data->rx_action.data,
2025 data->rx_action.len);
2026 break;
2027 }
2028 #endif /* CONFIG_SME */
2029 #endif /* CONFIG_IEEE80211W */
2030 #ifdef CONFIG_GAS
2031 if (data->rx_action.category == WLAN_ACTION_PUBLIC &&
2032 gas_query_rx(wpa_s->gas, data->rx_action.da,
2033 data->rx_action.sa, data->rx_action.bssid,
2034 data->rx_action.data, data->rx_action.len,
2035 data->rx_action.freq) == 0)
2036 break;
2037 #endif /* CONFIG_GAS */
2038 #ifdef CONFIG_P2P
2039 wpas_p2p_rx_action(wpa_s, data->rx_action.da,
2040 data->rx_action.sa,
2041 data->rx_action.bssid,
2042 data->rx_action.category,
2043 data->rx_action.data,
2044 data->rx_action.len, data->rx_action.freq);
2045 #endif /* CONFIG_P2P */
2046 break;
2047 case EVENT_RX_PROBE_REQ:
2048 if (data->rx_probe_req.sa == NULL ||
2049 data->rx_probe_req.ie == NULL)
2050 break;
2051 #ifdef CONFIG_AP
2052 if (wpa_s->ap_iface) {
2053 hostapd_probe_req_rx(wpa_s->ap_iface->bss[0],
2054 data->rx_probe_req.sa,
2055 data->rx_probe_req.da,
2056 data->rx_probe_req.bssid,
2057 data->rx_probe_req.ie,
2058 data->rx_probe_req.ie_len);
2059 break;
2060 }
2061 #endif /* CONFIG_AP */
2062 #ifdef CONFIG_P2P
2063 wpas_p2p_probe_req_rx(wpa_s, data->rx_probe_req.sa,
2064 data->rx_probe_req.da,
2065 data->rx_probe_req.bssid,
2066 data->rx_probe_req.ie,
2067 data->rx_probe_req.ie_len);
2068 #endif /* CONFIG_P2P */
2069 break;
2070 #ifdef CONFIG_P2P
2071 case EVENT_REMAIN_ON_CHANNEL:
2072 wpas_p2p_remain_on_channel_cb(
2073 wpa_s, data->remain_on_channel.freq,
2074 data->remain_on_channel.duration);
2075 break;
2076 case EVENT_CANCEL_REMAIN_ON_CHANNEL:
2077 wpas_p2p_cancel_remain_on_channel_cb(
2078 wpa_s, data->remain_on_channel.freq);
2079 break;
2080 case EVENT_P2P_DEV_FOUND: {
2081 struct p2p_peer_info peer_info;
2082
2083 os_memset(&peer_info, 0, sizeof(peer_info));
2084 if (data->p2p_dev_found.dev_addr)
2085 os_memcpy(peer_info.p2p_device_addr,
2086 data->p2p_dev_found.dev_addr, ETH_ALEN);
2087 if (data->p2p_dev_found.pri_dev_type)
2088 os_memcpy(peer_info.pri_dev_type,
2089 data->p2p_dev_found.pri_dev_type,
2090 sizeof(peer_info.pri_dev_type));
2091 if (data->p2p_dev_found.dev_name)
2092 os_strlcpy(peer_info.device_name,
2093 data->p2p_dev_found.dev_name,
2094 sizeof(peer_info.device_name));
2095 peer_info.config_methods = data->p2p_dev_found.config_methods;
2096 peer_info.dev_capab = data->p2p_dev_found.dev_capab;
2097 peer_info.group_capab = data->p2p_dev_found.group_capab;
2098
2099 /*
2100 * FIX: new_device=1 is not necessarily correct. We should
2101 * maintain a P2P peer database in wpa_supplicant and update
2102 * this information based on whether the peer is truly new.
2103 */
2104 wpas_dev_found(wpa_s, data->p2p_dev_found.addr, &peer_info, 1);
2105 break;
2106 }
2107 case EVENT_P2P_GO_NEG_REQ_RX:
2108 wpas_go_neg_req_rx(wpa_s, data->p2p_go_neg_req_rx.src,
2109 data->p2p_go_neg_req_rx.dev_passwd_id);
2110 break;
2111 case EVENT_P2P_GO_NEG_COMPLETED:
2112 wpas_go_neg_completed(wpa_s, data->p2p_go_neg_completed.res);
2113 break;
2114 case EVENT_P2P_PROV_DISC_REQUEST:
2115 wpas_prov_disc_req(wpa_s, data->p2p_prov_disc_req.peer,
2116 data->p2p_prov_disc_req.config_methods,
2117 data->p2p_prov_disc_req.dev_addr,
2118 data->p2p_prov_disc_req.pri_dev_type,
2119 data->p2p_prov_disc_req.dev_name,
2120 data->p2p_prov_disc_req.supp_config_methods,
2121 data->p2p_prov_disc_req.dev_capab,
2122 data->p2p_prov_disc_req.group_capab);
2123 break;
2124 case EVENT_P2P_PROV_DISC_RESPONSE:
2125 wpas_prov_disc_resp(wpa_s, data->p2p_prov_disc_resp.peer,
2126 data->p2p_prov_disc_resp.config_methods);
2127 break;
2128 case EVENT_P2P_SD_REQUEST:
2129 wpas_sd_request(wpa_s, data->p2p_sd_req.freq,
2130 data->p2p_sd_req.sa,
2131 data->p2p_sd_req.dialog_token,
2132 data->p2p_sd_req.update_indic,
2133 data->p2p_sd_req.tlvs,
2134 data->p2p_sd_req.tlvs_len);
2135 break;
2136 case EVENT_P2P_SD_RESPONSE:
2137 wpas_sd_response(wpa_s, data->p2p_sd_resp.sa,
2138 data->p2p_sd_resp.update_indic,
2139 data->p2p_sd_resp.tlvs,
2140 data->p2p_sd_resp.tlvs_len);
2141 break;
2142 #endif /* CONFIG_P2P */
2143 #ifdef CONFIG_CLIENT_MLME
2144 case EVENT_MLME_RX: {
2145 struct ieee80211_rx_status rx_status;
2146 os_memset(&rx_status, 0, sizeof(rx_status));
2147 rx_status.freq = data->mlme_rx.freq;
2148 rx_status.channel = data->mlme_rx.channel;
2149 rx_status.ssi = data->mlme_rx.ssi;
2150 ieee80211_sta_rx(wpa_s, data->mlme_rx.buf, data->mlme_rx.len,
2151 &rx_status);
2152 break;
2153 }
2154 #endif /* CONFIG_CLIENT_MLME */
2155 case EVENT_EAPOL_RX:
2156 wpa_supplicant_rx_eapol(wpa_s, data->eapol_rx.src,
2157 data->eapol_rx.data,
2158 data->eapol_rx.data_len);
2159 break;
2160 case EVENT_SIGNAL_CHANGE:
2161 bgscan_notify_signal_change(
2162 wpa_s, data->signal_change.above_threshold,
2163 data->signal_change.current_signal,
2164 data->signal_change.current_noise,
2165 data->signal_change.current_txrate);
2166 break;
2167 case EVENT_INTERFACE_ENABLED:
2168 wpa_dbg(wpa_s, MSG_DEBUG, "Interface was enabled");
2169 if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
2170 #ifdef CONFIG_AP
2171 if (!wpa_s->ap_iface) {
2172 wpa_supplicant_set_state(wpa_s,
2173 WPA_DISCONNECTED);
2174 wpa_supplicant_req_scan(wpa_s, 0, 0);
2175 } else
2176 wpa_supplicant_set_state(wpa_s,
2177 WPA_COMPLETED);
2178 #else /* CONFIG_AP */
2179 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2180 wpa_supplicant_req_scan(wpa_s, 0, 0);
2181 #endif /* CONFIG_AP */
2182 }
2183 break;
2184 case EVENT_INTERFACE_DISABLED:
2185 wpa_dbg(wpa_s, MSG_DEBUG, "Interface was disabled");
2186 wpa_supplicant_mark_disassoc(wpa_s);
2187 wpa_supplicant_set_state(wpa_s, WPA_INTERFACE_DISABLED);
2188 break;
2189 case EVENT_CHANNEL_LIST_CHANGED:
2190 if (wpa_s->drv_priv == NULL)
2191 break; /* Ignore event during drv initialization */
2192 #ifdef CONFIG_P2P
2193 wpas_p2p_update_channel_list(wpa_s);
2194 #endif /* CONFIG_P2P */
2195 break;
2196 case EVENT_INTERFACE_UNAVAILABLE:
2197 #ifdef CONFIG_P2P
2198 wpas_p2p_interface_unavailable(wpa_s);
2199 #endif /* CONFIG_P2P */
2200 break;
2201 case EVENT_BEST_CHANNEL:
2202 wpa_dbg(wpa_s, MSG_DEBUG, "Best channel event received "
2203 "(%d %d %d)",
2204 data->best_chan.freq_24, data->best_chan.freq_5,
2205 data->best_chan.freq_overall);
2206 wpa_s->best_24_freq = data->best_chan.freq_24;
2207 wpa_s->best_5_freq = data->best_chan.freq_5;
2208 wpa_s->best_overall_freq = data->best_chan.freq_overall;
2209 #ifdef CONFIG_P2P
2210 wpas_p2p_update_best_channels(wpa_s, data->best_chan.freq_24,
2211 data->best_chan.freq_5,
2212 data->best_chan.freq_overall);
2213 #endif /* CONFIG_P2P */
2214 break;
2215 case EVENT_UNPROT_DEAUTH:
2216 wpa_supplicant_event_unprot_deauth(wpa_s,
2217 &data->unprot_deauth);
2218 break;
2219 case EVENT_UNPROT_DISASSOC:
2220 wpa_supplicant_event_unprot_disassoc(wpa_s,
2221 &data->unprot_disassoc);
2222 break;
2223 case EVENT_STATION_LOW_ACK:
2224 #ifdef CONFIG_AP
2225 if (wpa_s->ap_iface && data)
2226 hostapd_event_sta_low_ack(wpa_s->ap_iface->bss[0],
2227 data->low_ack.addr);
2228 #endif /* CONFIG_AP */
2229 break;
2230 case EVENT_IBSS_PEER_LOST:
2231 #ifdef CONFIG_IBSS_RSN
2232 ibss_rsn_stop(wpa_s->ibss_rsn, data->ibss_peer_lost.peer);
2233 #endif /* CONFIG_IBSS_RSN */
2234 break;
2235 case EVENT_DRIVER_GTK_REKEY:
2236 if (os_memcmp(data->driver_gtk_rekey.bssid,
2237 wpa_s->bssid, ETH_ALEN))
2238 break;
2239 if (!wpa_s->wpa)
2240 break;
2241 wpa_sm_update_replay_ctr(wpa_s->wpa,
2242 data->driver_gtk_rekey.replay_ctr);
2243 break;
2244 default:
2245 wpa_msg(wpa_s, MSG_INFO, "Unknown event %d", event);
2246 break;
2247 }
2248 }
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