2 * WPA Supplicant - Driver event processing
3 * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
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.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
18 #include "eapol_supp/eapol_supp_sm.h"
21 #include "drivers/driver.h"
23 #include "l2_packet/l2_packet.h"
24 #include "wpa_supplicant_i.h"
25 #include "pcsc_funcs.h"
27 #include "pmksa_cache.h"
29 #include "eap_peer/eap.h"
30 #include "ctrl_iface_dbus.h"
31 #include "ieee802_11_defs.h"
32 #include "blacklist.h"
33 #include "wpas_glue.h"
34 #include "wps_supplicant.h"
37 static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
39 struct wpa_ssid *ssid;
41 if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
44 wpa_printf(MSG_DEBUG, "Select network based on association "
46 ssid = wpa_supplicant_get_ssid(wpa_s);
48 wpa_printf(MSG_INFO, "No network configuration found for the "
54 wpa_printf(MSG_DEBUG, "Selected network is disabled");
58 wpa_printf(MSG_DEBUG, "Network configuration found for the current "
60 if (ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
61 WPA_KEY_MGMT_WPA_NONE |
62 WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_FT_IEEE8021X |
63 WPA_KEY_MGMT_PSK_SHA256 |
64 WPA_KEY_MGMT_IEEE8021X_SHA256)) {
66 size_t wpa_ie_len = sizeof(wpa_ie);
67 wpa_supplicant_set_suites(wpa_s, NULL, ssid,
70 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
73 if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
74 eapol_sm_invalidate_cached_session(wpa_s->eapol);
75 wpa_s->current_ssid = ssid;
76 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
77 wpa_supplicant_initiate_eapol(wpa_s);
83 static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
86 struct wpa_supplicant *wpa_s = eloop_ctx;
88 if (wpa_s->countermeasures) {
89 wpa_s->countermeasures = 0;
90 wpa_drv_set_countermeasures(wpa_s, 0);
91 wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
92 wpa_supplicant_req_scan(wpa_s, 0, 0);
97 void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
99 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
100 os_memset(wpa_s->bssid, 0, ETH_ALEN);
101 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
102 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
103 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
104 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
105 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
106 wpa_s->ap_ies_from_associnfo = 0;
110 static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
112 struct wpa_ie_data ie;
116 if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
120 for (i = 0; i < ie.num_pmkid; i++) {
121 pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
122 ie.pmkid + i * PMKID_LEN,
124 if (pmksa_set == 0) {
125 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
130 wpa_printf(MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from PMKSA "
131 "cache", pmksa_set == 0 ? "" : "not ");
135 static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
136 union wpa_event_data *data)
139 wpa_printf(MSG_DEBUG, "RSN: No data in PMKID candidate event");
142 wpa_printf(MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
143 " index=%d preauth=%d",
144 MAC2STR(data->pmkid_candidate.bssid),
145 data->pmkid_candidate.index,
146 data->pmkid_candidate.preauth);
148 pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
149 data->pmkid_candidate.index,
150 data->pmkid_candidate.preauth);
154 static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
156 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
157 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
160 #ifdef IEEE8021X_EAPOL
161 if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
162 wpa_s->current_ssid &&
163 !(wpa_s->current_ssid->eapol_flags &
164 (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
165 EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
166 /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
167 * plaintext or static WEP keys). */
170 #endif /* IEEE8021X_EAPOL */
177 * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
178 * @wpa_s: pointer to wpa_supplicant data
179 * @ssid: Configuration data for the network
180 * Returns: 0 on success, -1 on failure
182 * This function is called when starting authentication with a network that is
183 * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
185 int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
186 struct wpa_ssid *ssid)
188 #ifdef IEEE8021X_EAPOL
189 int aka = 0, sim = 0, type;
191 if (ssid->eap.pcsc == NULL || wpa_s->scard != NULL)
194 if (ssid->eap.eap_methods == NULL) {
198 struct eap_method_type *eap = ssid->eap.eap_methods;
199 while (eap->vendor != EAP_VENDOR_IETF ||
200 eap->method != EAP_TYPE_NONE) {
201 if (eap->vendor == EAP_VENDOR_IETF) {
202 if (eap->method == EAP_TYPE_SIM)
204 else if (eap->method == EAP_TYPE_AKA)
211 if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
213 if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL)
217 wpa_printf(MSG_DEBUG, "Selected network is configured to use "
218 "SIM, but neither EAP-SIM nor EAP-AKA are enabled");
222 wpa_printf(MSG_DEBUG, "Selected network is configured to use SIM "
223 "(sim=%d aka=%d) - initialize PCSC", sim, aka);
225 type = SCARD_TRY_BOTH;
227 type = SCARD_USIM_ONLY;
229 type = SCARD_GSM_SIM_ONLY;
231 wpa_s->scard = scard_init(type);
232 if (wpa_s->scard == NULL) {
233 wpa_printf(MSG_WARNING, "Failed to initialize SIM "
237 wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
238 eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
239 #endif /* IEEE8021X_EAPOL */
245 #ifndef CONFIG_NO_SCAN_PROCESSING
246 static int wpa_supplicant_match_privacy(struct wpa_scan_res *bss,
247 struct wpa_ssid *ssid)
251 if (ssid->mixed_cell)
254 for (i = 0; i < NUM_WEP_KEYS; i++) {
255 if (ssid->wep_key_len[i]) {
260 #ifdef IEEE8021X_EAPOL
261 if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
262 ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
263 EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
265 #endif /* IEEE8021X_EAPOL */
267 if (bss->caps & IEEE80211_CAP_PRIVACY)
273 static int wpa_supplicant_ssid_bss_match(struct wpa_supplicant *wpa_s,
274 struct wpa_ssid *ssid,
275 struct wpa_scan_res *bss)
277 struct wpa_ie_data ie;
279 const u8 *rsn_ie, *wpa_ie;
282 ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss);
286 rsn_ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
287 while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
290 if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
291 wpa_printf(MSG_DEBUG, " skip RSN IE - parse failed");
294 if (!(ie.proto & ssid->proto)) {
295 wpa_printf(MSG_DEBUG, " skip RSN IE - proto "
300 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
301 wpa_printf(MSG_DEBUG, " skip RSN IE - PTK cipher "
306 if (!(ie.group_cipher & ssid->group_cipher)) {
307 wpa_printf(MSG_DEBUG, " skip RSN IE - GTK cipher "
312 if (!(ie.key_mgmt & ssid->key_mgmt)) {
313 wpa_printf(MSG_DEBUG, " skip RSN IE - key mgmt "
318 #ifdef CONFIG_IEEE80211W
319 if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
320 ssid->ieee80211w == IEEE80211W_REQUIRED) {
321 wpa_printf(MSG_DEBUG, " skip RSN IE - no mgmt frame "
325 #endif /* CONFIG_IEEE80211W */
327 wpa_printf(MSG_DEBUG, " selected based on RSN IE");
331 wpa_ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
332 while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
335 if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) {
336 wpa_printf(MSG_DEBUG, " skip WPA IE - parse failed");
339 if (!(ie.proto & ssid->proto)) {
340 wpa_printf(MSG_DEBUG, " skip WPA IE - proto "
345 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
346 wpa_printf(MSG_DEBUG, " skip WPA IE - PTK cipher "
351 if (!(ie.group_cipher & ssid->group_cipher)) {
352 wpa_printf(MSG_DEBUG, " skip WPA IE - GTK cipher "
357 if (!(ie.key_mgmt & ssid->key_mgmt)) {
358 wpa_printf(MSG_DEBUG, " skip WPA IE - key mgmt "
363 wpa_printf(MSG_DEBUG, " selected based on WPA IE");
367 if (proto_match == 0)
368 wpa_printf(MSG_DEBUG, " skip - no WPA/RSN proto match");
374 static struct wpa_scan_res *
375 wpa_supplicant_select_bss_wpa(struct wpa_supplicant *wpa_s,
376 struct wpa_ssid *group,
377 struct wpa_ssid **selected_ssid)
379 struct wpa_ssid *ssid;
380 struct wpa_scan_res *bss;
382 struct wpa_blacklist *e;
385 wpa_printf(MSG_DEBUG, "Try to find WPA-enabled AP");
386 for (i = 0; i < wpa_s->scan_res->num; i++) {
388 u8 wpa_ie_len, rsn_ie_len, ssid_len;
389 bss = wpa_s->scan_res->res[i];
391 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
392 ssid_ = ie ? ie + 2 : (u8 *) "";
393 ssid_len = ie ? ie[1] : 0;
395 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
396 wpa_ie_len = ie ? ie[1] : 0;
398 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
399 rsn_ie_len = ie ? ie[1] : 0;
401 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
402 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
403 (int) i, MAC2STR(bss->bssid),
404 wpa_ssid_txt(ssid_, ssid_len),
405 wpa_ie_len, rsn_ie_len, bss->caps);
407 e = wpa_blacklist_get(wpa_s, bss->bssid);
408 if (e && e->count > 1) {
409 wpa_printf(MSG_DEBUG, " skip - blacklisted");
413 if (wpa_ie_len == 0 && rsn_ie_len == 0) {
414 wpa_printf(MSG_DEBUG, " skip - no WPA/RSN IE");
418 for (ssid = group; ssid; ssid = ssid->pnext) {
421 if (ssid->disabled) {
422 wpa_printf(MSG_DEBUG, " skip - disabled");
427 if (ssid->ssid_len == 0 &&
428 wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
430 #endif /* CONFIG_WPS */
433 (ssid_len != ssid->ssid_len ||
434 os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
435 wpa_printf(MSG_DEBUG, " skip - "
440 if (ssid->bssid_set &&
441 os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
443 wpa_printf(MSG_DEBUG, " skip - "
448 if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
451 wpa_printf(MSG_DEBUG, " selected WPA AP "
454 wpa_ssid_txt(ssid_, ssid_len));
455 *selected_ssid = ssid;
464 static struct wpa_scan_res *
465 wpa_supplicant_select_bss_non_wpa(struct wpa_supplicant *wpa_s,
466 struct wpa_ssid *group,
467 struct wpa_ssid **selected_ssid)
469 struct wpa_ssid *ssid;
470 struct wpa_scan_res *bss;
472 struct wpa_blacklist *e;
475 wpa_printf(MSG_DEBUG, "Try to find non-WPA AP");
476 for (i = 0; i < wpa_s->scan_res->num; i++) {
478 u8 wpa_ie_len, rsn_ie_len, ssid_len;
479 bss = wpa_s->scan_res->res[i];
481 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
482 ssid_ = ie ? ie + 2 : (u8 *) "";
483 ssid_len = ie ? ie[1] : 0;
485 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
486 wpa_ie_len = ie ? ie[1] : 0;
488 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
489 rsn_ie_len = ie ? ie[1] : 0;
491 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
492 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
493 (int) i, MAC2STR(bss->bssid),
494 wpa_ssid_txt(ssid_, ssid_len),
495 wpa_ie_len, rsn_ie_len, bss->caps);
497 e = wpa_blacklist_get(wpa_s, bss->bssid);
498 if (e && e->count > 1) {
499 wpa_printf(MSG_DEBUG, " skip - blacklisted");
503 for (ssid = group; ssid; ssid = ssid->pnext) {
504 int check_ssid = ssid->ssid_len != 0;
506 if (ssid->disabled) {
507 wpa_printf(MSG_DEBUG, " skip - disabled");
512 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
513 /* Only allow wildcard SSID match if an AP
514 * advertises active WPS operation that matches
517 if (ssid->ssid_len == 0 &&
518 wpas_wps_ssid_wildcard_ok(wpa_s, ssid,
522 #endif /* CONFIG_WPS */
525 (ssid_len != ssid->ssid_len ||
526 os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
527 wpa_printf(MSG_DEBUG, " skip - "
532 if (ssid->bssid_set &&
533 os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
535 wpa_printf(MSG_DEBUG, " skip - "
540 if (!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
541 !(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
542 !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
544 wpa_printf(MSG_DEBUG, " skip - "
545 "non-WPA network not allowed");
549 if ((ssid->key_mgmt &
550 (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
551 WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK |
552 WPA_KEY_MGMT_IEEE8021X_SHA256 |
553 WPA_KEY_MGMT_PSK_SHA256)) &&
554 (wpa_ie_len != 0 || rsn_ie_len != 0)) {
555 wpa_printf(MSG_DEBUG, " skip - "
560 if (!wpa_supplicant_match_privacy(bss, ssid)) {
561 wpa_printf(MSG_DEBUG, " skip - "
566 if (bss->caps & IEEE80211_CAP_IBSS) {
567 wpa_printf(MSG_DEBUG, " skip - "
568 "IBSS (adhoc) network");
572 wpa_printf(MSG_DEBUG, " selected non-WPA AP "
575 wpa_ssid_txt(ssid_, ssid_len));
576 *selected_ssid = ssid;
585 static struct wpa_scan_res *
586 wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group,
587 struct wpa_ssid **selected_ssid)
589 struct wpa_scan_res *selected;
591 wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
594 /* First, try to find WPA-enabled AP */
595 selected = wpa_supplicant_select_bss_wpa(wpa_s, group, selected_ssid);
599 /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
601 return wpa_supplicant_select_bss_non_wpa(wpa_s, group, selected_ssid);
605 static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
608 struct wpa_scan_res *selected = NULL;
609 struct wpa_ssid *ssid = NULL;
611 if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
612 if (wpa_s->conf->ap_scan == 2)
614 wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
621 * Don't post the results if this was the initial cached
622 * and there were no results.
624 if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1 &&
625 wpa_s->scan_res->num == 0) {
626 wpa_msg(wpa_s, MSG_DEBUG, "Cached scan results are "
627 "empty - not posting");
629 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
630 wpa_supplicant_dbus_notify_scan_results(wpa_s);
631 wpas_wps_notify_scan_results(wpa_s);
634 if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s)) ||
638 while (selected == NULL) {
639 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
640 selected = wpa_supplicant_select_bss(
641 wpa_s, wpa_s->conf->pssid[prio], &ssid);
646 if (selected == NULL && wpa_s->blacklist) {
647 wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
649 wpa_blacklist_clear(wpa_s);
650 wpa_s->blacklist_cleared++;
651 } else if (selected == NULL) {
657 if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
658 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
659 "PBC session overlap");
664 /* Do not trigger new association unless the BSSID has changed
665 * or if reassociation is requested. If we are in process of
666 * associating with the selected BSSID, do not trigger new
668 if (wpa_s->reassociate ||
669 (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
670 (wpa_s->wpa_state != WPA_ASSOCIATING ||
671 os_memcmp(selected->bssid, wpa_s->pending_bssid,
673 if (wpa_supplicant_scard_init(wpa_s, ssid)) {
674 wpa_supplicant_req_scan(wpa_s, 10, 0);
677 wpa_supplicant_associate(wpa_s, selected, ssid);
679 wpa_printf(MSG_DEBUG, "Already associated with the "
682 rsn_preauth_scan_results(wpa_s->wpa, wpa_s->scan_res);
684 wpa_printf(MSG_DEBUG, "No suitable AP found.");
692 if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
694 * Quick recovery if the initial scan results were not
695 * complete when fetched before the first scan request.
697 wpa_s->scan_res_tried++;
700 wpa_supplicant_req_scan(wpa_s, timeout, 0);
702 #endif /* CONFIG_NO_SCAN_PROCESSING */
705 static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
706 union wpa_event_data *data)
708 int l, len, found = 0, wpa_found, rsn_found;
711 wpa_printf(MSG_DEBUG, "Association info event");
712 if (data->assoc_info.req_ies)
713 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
714 data->assoc_info.req_ies_len);
715 if (data->assoc_info.resp_ies)
716 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
717 data->assoc_info.resp_ies_len);
718 if (data->assoc_info.beacon_ies)
719 wpa_hexdump(MSG_DEBUG, "beacon_ies",
720 data->assoc_info.beacon_ies,
721 data->assoc_info.beacon_ies_len);
723 p = data->assoc_info.req_ies;
724 l = data->assoc_info.req_ies_len;
726 /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
727 while (p && l >= 2) {
730 wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
734 if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
735 (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
736 (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
737 if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
740 wpa_find_assoc_pmkid(wpa_s);
746 if (!found && data->assoc_info.req_ies)
747 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
749 /* WPA/RSN IE from Beacon/ProbeResp */
750 p = data->assoc_info.beacon_ies;
751 l = data->assoc_info.beacon_ies_len;
753 /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
755 wpa_found = rsn_found = 0;
756 while (p && l >= 2) {
759 wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
764 p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
765 os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
767 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
771 p[0] == WLAN_EID_RSN && p[1] >= 2) {
773 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
780 if (!wpa_found && data->assoc_info.beacon_ies)
781 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
782 if (!rsn_found && data->assoc_info.beacon_ies)
783 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
784 if (wpa_found || rsn_found)
785 wpa_s->ap_ies_from_associnfo = 1;
789 static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
790 union wpa_event_data *data)
793 int ft_completed = wpa_ft_is_completed(wpa_s->wpa);
796 wpa_supplicant_event_associnfo(wpa_s, data);
798 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
799 if (wpa_s->use_client_mlme)
800 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
801 if (wpa_s->use_client_mlme ||
802 (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
803 os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
804 wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
805 MACSTR, MAC2STR(bssid));
806 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
807 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
808 if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
809 wpa_clear_keys(wpa_s, bssid);
811 if (wpa_supplicant_select_config(wpa_s) < 0) {
812 wpa_supplicant_disassociate(
813 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
818 wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
819 if (wpa_s->current_ssid) {
820 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
821 * initialized before association, but for other modes,
822 * initialize PC/SC here, if the current configuration needs
823 * smartcard or SIM/USIM. */
824 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
826 wpa_sm_notify_assoc(wpa_s->wpa, bssid);
827 l2_packet_notify_auth_start(wpa_s->l2);
830 * Set portEnabled first to FALSE in order to get EAP state machine out
831 * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
832 * state machine may transit to AUTHENTICATING state based on obsolete
833 * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
834 * AUTHENTICATED without ever giving chance to EAP state machine to
838 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
839 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
841 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
842 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
843 /* 802.1X::portControl = Auto */
844 eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
845 wpa_s->eapol_received = 0;
846 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
847 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
848 wpa_supplicant_cancel_auth_timeout(wpa_s);
849 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
850 } else if (!ft_completed) {
851 /* Timeout for receiving the first EAPOL packet */
852 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
854 wpa_supplicant_cancel_scan(wpa_s);
856 if (wpa_s->driver_4way_handshake &&
857 wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
859 * We are done; the driver will take care of RSN 4-way
862 wpa_supplicant_cancel_auth_timeout(wpa_s);
863 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
864 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
865 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
870 static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
874 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
876 * At least Host AP driver and a Prism3 card seemed to be
877 * generating streams of disconnected events when configuring
878 * IBSS for WPA-None. Ignore them for now.
880 wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
881 "IBSS/WPA-None mode");
885 if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
886 wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
887 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
888 "pre-shared key may be incorrect");
890 if (wpa_s->wpa_state >= WPA_ASSOCIATED)
891 wpa_supplicant_req_scan(wpa_s, 0, 100000);
892 bssid = wpa_s->bssid;
893 if (is_zero_ether_addr(bssid))
894 bssid = wpa_s->pending_bssid;
895 wpa_blacklist_add(wpa_s, bssid);
896 wpa_sm_notify_disassoc(wpa_s->wpa);
897 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
899 if (wpa_supplicant_dynamic_keys(wpa_s)) {
900 wpa_s->keys_cleared = 0;
901 wpa_clear_keys(wpa_s, wpa_s->bssid);
903 wpa_supplicant_mark_disassoc(wpa_s);
907 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
908 static void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx,
911 struct wpa_supplicant *wpa_s = eloop_ctx;
913 if (!wpa_s->pending_mic_error_report)
916 wpa_printf(MSG_DEBUG, "WPA: Sending pending MIC error report");
917 wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
918 wpa_s->pending_mic_error_report = 0;
920 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
924 wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
925 union wpa_event_data *data)
930 wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
931 pairwise = (data && data->michael_mic_failure.unicast);
933 if ((wpa_s->last_michael_mic_error &&
934 t.sec - wpa_s->last_michael_mic_error <= 60) ||
935 wpa_s->pending_mic_error_report) {
936 if (wpa_s->pending_mic_error_report) {
938 * Send the pending MIC error report immediately since
939 * we are going to start countermeasures and AP better
942 wpa_sm_key_request(wpa_s->wpa, 1,
943 wpa_s->pending_mic_error_pairwise);
946 /* Send the new MIC error report immediately since we are going
947 * to start countermeasures and AP better do the same.
949 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
951 /* initialize countermeasures */
952 wpa_s->countermeasures = 1;
953 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
956 * Need to wait for completion of request frame. We do not get
957 * any callback for the message completion, so just wait a
958 * short while and hope for the best. */
961 wpa_drv_set_countermeasures(wpa_s, 1);
962 wpa_supplicant_deauthenticate(wpa_s,
963 WLAN_REASON_MICHAEL_MIC_FAILURE);
964 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
966 eloop_register_timeout(60, 0,
967 wpa_supplicant_stop_countermeasures,
969 /* TODO: mark the AP rejected for 60 second. STA is
970 * allowed to associate with another AP.. */
972 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
973 if (wpa_s->mic_errors_seen) {
975 * Reduce the effectiveness of Michael MIC error
976 * reports as a means for attacking against TKIP if
977 * more than one MIC failure is noticed with the same
978 * PTK. We delay the transmission of the reports by a
979 * random time between 0 and 60 seconds in order to
980 * force the attacker wait 60 seconds before getting
981 * the information on whether a frame resulted in a MIC
987 if (os_get_random(rval, sizeof(rval)) < 0)
988 sec = os_random() % 60;
990 sec = WPA_GET_BE32(rval) % 60;
991 wpa_printf(MSG_DEBUG, "WPA: Delay MIC error report %d "
993 wpa_s->pending_mic_error_report = 1;
994 wpa_s->pending_mic_error_pairwise = pairwise;
995 eloop_cancel_timeout(
996 wpa_supplicant_delayed_mic_error_report,
998 eloop_register_timeout(
999 sec, os_random() % 1000000,
1000 wpa_supplicant_delayed_mic_error_report,
1003 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1005 #else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1006 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1007 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1009 wpa_s->last_michael_mic_error = t.sec;
1010 wpa_s->mic_errors_seen++;
1014 #ifdef CONFIG_TERMINATE_ONLASTIF
1015 static int any_interfaces(struct wpa_supplicant *head)
1017 struct wpa_supplicant *wpa_s;
1019 for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
1020 if (!wpa_s->interface_removed)
1024 #endif /* CONFIG_TERMINATE_ONLASTIF */
1027 wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
1028 union wpa_event_data *data)
1030 if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
1033 switch (data->interface_status.ievent) {
1034 case EVENT_INTERFACE_ADDED:
1035 if (!wpa_s->interface_removed)
1037 wpa_s->interface_removed = 0;
1038 wpa_printf(MSG_DEBUG, "Configured interface was added.");
1039 if (wpa_supplicant_driver_init(wpa_s) < 0) {
1040 wpa_printf(MSG_INFO, "Failed to initialize the driver "
1041 "after interface was added.");
1044 case EVENT_INTERFACE_REMOVED:
1045 wpa_printf(MSG_DEBUG, "Configured interface was removed.");
1046 wpa_s->interface_removed = 1;
1047 wpa_supplicant_mark_disassoc(wpa_s);
1048 l2_packet_deinit(wpa_s->l2);
1050 #ifdef CONFIG_TERMINATE_ONLASTIF
1051 /* check if last interface */
1052 if (!any_interfaces(wpa_s->global->ifaces))
1054 #endif /* CONFIG_TERMINATE_ONLASTIF */
1060 #ifdef CONFIG_PEERKEY
1062 wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
1063 union wpa_event_data *data)
1067 wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
1069 #endif /* CONFIG_PEERKEY */
1072 #ifdef CONFIG_IEEE80211R
1074 wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
1075 union wpa_event_data *data)
1080 if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
1081 data->ft_ies.ies_len,
1082 data->ft_ies.ft_action,
1083 data->ft_ies.target_ap) < 0) {
1084 /* TODO: prevent MLME/driver from trying to associate? */
1087 #endif /* CONFIG_IEEE80211R */
1090 void wpa_supplicant_event(void *ctx, wpa_event_type event,
1091 union wpa_event_data *data)
1093 struct wpa_supplicant *wpa_s = ctx;
1097 wpa_supplicant_event_assoc(wpa_s, data);
1099 case EVENT_DISASSOC:
1100 wpa_supplicant_event_disassoc(wpa_s);
1102 case EVENT_MICHAEL_MIC_FAILURE:
1103 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
1105 #ifndef CONFIG_NO_SCAN_PROCESSING
1106 case EVENT_SCAN_RESULTS:
1107 wpa_supplicant_event_scan_results(wpa_s);
1109 #endif /* CONFIG_NO_SCAN_PROCESSING */
1110 case EVENT_ASSOCINFO:
1111 wpa_supplicant_event_associnfo(wpa_s, data);
1113 case EVENT_INTERFACE_STATUS:
1114 wpa_supplicant_event_interface_status(wpa_s, data);
1116 case EVENT_PMKID_CANDIDATE:
1117 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
1119 #ifdef CONFIG_PEERKEY
1120 case EVENT_STKSTART:
1121 wpa_supplicant_event_stkstart(wpa_s, data);
1123 #endif /* CONFIG_PEERKEY */
1124 #ifdef CONFIG_IEEE80211R
1125 case EVENT_FT_RESPONSE:
1126 wpa_supplicant_event_ft_response(wpa_s, data);
1128 #endif /* CONFIG_IEEE80211R */
1130 wpa_printf(MSG_INFO, "Unknown event %d", event);