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)
255 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
257 #endif /* CONFIG_WPS */
259 for (i = 0; i < NUM_WEP_KEYS; i++) {
260 if (ssid->wep_key_len[i]) {
265 #ifdef IEEE8021X_EAPOL
266 if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
267 ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
268 EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
270 #endif /* IEEE8021X_EAPOL */
272 if (bss->caps & IEEE80211_CAP_PRIVACY)
278 static int wpa_supplicant_ssid_bss_match(struct wpa_supplicant *wpa_s,
279 struct wpa_ssid *ssid,
280 struct wpa_scan_res *bss)
282 struct wpa_ie_data ie;
284 const u8 *rsn_ie, *wpa_ie;
287 ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss);
291 rsn_ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
292 while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
295 if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
296 wpa_printf(MSG_DEBUG, " skip RSN IE - parse failed");
299 if (!(ie.proto & ssid->proto)) {
300 wpa_printf(MSG_DEBUG, " skip RSN IE - proto "
305 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
306 wpa_printf(MSG_DEBUG, " skip RSN IE - PTK cipher "
311 if (!(ie.group_cipher & ssid->group_cipher)) {
312 wpa_printf(MSG_DEBUG, " skip RSN IE - GTK cipher "
317 if (!(ie.key_mgmt & ssid->key_mgmt)) {
318 wpa_printf(MSG_DEBUG, " skip RSN IE - key mgmt "
323 #ifdef CONFIG_IEEE80211W
324 if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
325 ssid->ieee80211w == IEEE80211W_REQUIRED) {
326 wpa_printf(MSG_DEBUG, " skip RSN IE - no mgmt frame "
330 #endif /* CONFIG_IEEE80211W */
332 wpa_printf(MSG_DEBUG, " selected based on RSN IE");
336 wpa_ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
337 while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
340 if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) {
341 wpa_printf(MSG_DEBUG, " skip WPA IE - parse failed");
344 if (!(ie.proto & ssid->proto)) {
345 wpa_printf(MSG_DEBUG, " skip WPA IE - proto "
350 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
351 wpa_printf(MSG_DEBUG, " skip WPA IE - PTK cipher "
356 if (!(ie.group_cipher & ssid->group_cipher)) {
357 wpa_printf(MSG_DEBUG, " skip WPA IE - GTK cipher "
362 if (!(ie.key_mgmt & ssid->key_mgmt)) {
363 wpa_printf(MSG_DEBUG, " skip WPA IE - key mgmt "
368 wpa_printf(MSG_DEBUG, " selected based on WPA IE");
372 if (proto_match == 0)
373 wpa_printf(MSG_DEBUG, " skip - no WPA/RSN proto match");
379 static struct wpa_scan_res *
380 wpa_supplicant_select_bss_wpa(struct wpa_supplicant *wpa_s,
381 struct wpa_ssid *group,
382 struct wpa_ssid **selected_ssid)
384 struct wpa_ssid *ssid;
385 struct wpa_scan_res *bss;
387 struct wpa_blacklist *e;
390 wpa_printf(MSG_DEBUG, "Try to find WPA-enabled AP");
391 for (i = 0; i < wpa_s->scan_res->num; i++) {
393 u8 wpa_ie_len, rsn_ie_len, ssid_len;
394 bss = wpa_s->scan_res->res[i];
396 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
397 ssid_ = ie ? ie + 2 : (u8 *) "";
398 ssid_len = ie ? ie[1] : 0;
400 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
401 wpa_ie_len = ie ? ie[1] : 0;
403 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
404 rsn_ie_len = ie ? ie[1] : 0;
406 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
407 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
408 (int) i, MAC2STR(bss->bssid),
409 wpa_ssid_txt(ssid_, ssid_len),
410 wpa_ie_len, rsn_ie_len, bss->caps);
412 e = wpa_blacklist_get(wpa_s, bss->bssid);
413 if (e && e->count > 1) {
414 wpa_printf(MSG_DEBUG, " skip - blacklisted");
418 if (wpa_ie_len == 0 && rsn_ie_len == 0) {
419 wpa_printf(MSG_DEBUG, " skip - no WPA/RSN IE");
423 for (ssid = group; ssid; ssid = ssid->pnext) {
426 if (ssid->disabled) {
427 wpa_printf(MSG_DEBUG, " skip - disabled");
432 if (ssid->ssid_len == 0 &&
433 wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
435 #endif /* CONFIG_WPS */
438 (ssid_len != ssid->ssid_len ||
439 os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
440 wpa_printf(MSG_DEBUG, " skip - "
445 if (ssid->bssid_set &&
446 os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
448 wpa_printf(MSG_DEBUG, " skip - "
453 if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
456 wpa_printf(MSG_DEBUG, " selected WPA AP "
459 wpa_ssid_txt(ssid_, ssid_len));
460 *selected_ssid = ssid;
469 static struct wpa_scan_res *
470 wpa_supplicant_select_bss_non_wpa(struct wpa_supplicant *wpa_s,
471 struct wpa_ssid *group,
472 struct wpa_ssid **selected_ssid)
474 struct wpa_ssid *ssid;
475 struct wpa_scan_res *bss;
477 struct wpa_blacklist *e;
480 wpa_printf(MSG_DEBUG, "Try to find non-WPA AP");
481 for (i = 0; i < wpa_s->scan_res->num; i++) {
483 u8 wpa_ie_len, rsn_ie_len, ssid_len;
484 bss = wpa_s->scan_res->res[i];
486 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
487 ssid_ = ie ? ie + 2 : (u8 *) "";
488 ssid_len = ie ? ie[1] : 0;
490 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
491 wpa_ie_len = ie ? ie[1] : 0;
493 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
494 rsn_ie_len = ie ? ie[1] : 0;
496 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
497 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
498 (int) i, MAC2STR(bss->bssid),
499 wpa_ssid_txt(ssid_, ssid_len),
500 wpa_ie_len, rsn_ie_len, bss->caps);
502 e = wpa_blacklist_get(wpa_s, bss->bssid);
503 if (e && e->count > 1) {
504 wpa_printf(MSG_DEBUG, " skip - blacklisted");
508 for (ssid = group; ssid; ssid = ssid->pnext) {
509 int check_ssid = ssid->ssid_len != 0;
511 if (ssid->disabled) {
512 wpa_printf(MSG_DEBUG, " skip - disabled");
517 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
518 /* Only allow wildcard SSID match if an AP
519 * advertises active WPS operation that matches
522 if (ssid->ssid_len == 0 &&
523 wpas_wps_ssid_wildcard_ok(wpa_s, ssid,
527 #endif /* CONFIG_WPS */
530 (ssid_len != ssid->ssid_len ||
531 os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
532 wpa_printf(MSG_DEBUG, " skip - "
537 if (ssid->bssid_set &&
538 os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
540 wpa_printf(MSG_DEBUG, " skip - "
545 if (!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
546 !(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
547 !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
549 wpa_printf(MSG_DEBUG, " skip - "
550 "non-WPA network not allowed");
554 if ((ssid->key_mgmt &
555 (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
556 WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK |
557 WPA_KEY_MGMT_IEEE8021X_SHA256 |
558 WPA_KEY_MGMT_PSK_SHA256)) &&
559 (wpa_ie_len != 0 || rsn_ie_len != 0)) {
560 wpa_printf(MSG_DEBUG, " skip - "
565 if (!wpa_supplicant_match_privacy(bss, ssid)) {
566 wpa_printf(MSG_DEBUG, " skip - "
571 if (bss->caps & IEEE80211_CAP_IBSS) {
572 wpa_printf(MSG_DEBUG, " skip - "
573 "IBSS (adhoc) network");
577 wpa_printf(MSG_DEBUG, " selected non-WPA AP "
580 wpa_ssid_txt(ssid_, ssid_len));
581 *selected_ssid = ssid;
590 static struct wpa_scan_res *
591 wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group,
592 struct wpa_ssid **selected_ssid)
594 struct wpa_scan_res *selected;
596 wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
599 /* First, try to find WPA-enabled AP */
600 selected = wpa_supplicant_select_bss_wpa(wpa_s, group, selected_ssid);
604 /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
606 return wpa_supplicant_select_bss_non_wpa(wpa_s, group, selected_ssid);
610 static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
613 struct wpa_scan_res *selected = NULL;
614 struct wpa_ssid *ssid = NULL;
616 wpa_s->scan_ongoing = 0;
617 if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
618 if (wpa_s->conf->ap_scan == 2)
620 wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
627 * Don't post the results if this was the initial cached
628 * and there were no results.
630 if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1 &&
631 wpa_s->scan_res->num == 0) {
632 wpa_msg(wpa_s, MSG_DEBUG, "Cached scan results are "
633 "empty - not posting");
635 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
636 wpa_supplicant_dbus_notify_scan_results(wpa_s);
637 wpas_wps_notify_scan_results(wpa_s);
640 if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s)) ||
644 while (selected == NULL) {
645 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
646 selected = wpa_supplicant_select_bss(
647 wpa_s, wpa_s->conf->pssid[prio], &ssid);
652 if (selected == NULL && wpa_s->blacklist) {
653 wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
655 wpa_blacklist_clear(wpa_s);
656 wpa_s->blacklist_cleared++;
657 } else if (selected == NULL) {
663 if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
664 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
665 "PBC session overlap");
670 /* Do not trigger new association unless the BSSID has changed
671 * or if reassociation is requested. If we are in process of
672 * associating with the selected BSSID, do not trigger new
674 if (wpa_s->reassociate ||
675 (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
676 (wpa_s->wpa_state != WPA_ASSOCIATING ||
677 os_memcmp(selected->bssid, wpa_s->pending_bssid,
679 if (wpa_supplicant_scard_init(wpa_s, ssid)) {
680 wpa_supplicant_req_scan(wpa_s, 10, 0);
683 wpa_supplicant_associate(wpa_s, selected, ssid);
685 wpa_printf(MSG_DEBUG, "Already associated with the "
688 rsn_preauth_scan_results(wpa_s->wpa, wpa_s->scan_res);
690 wpa_printf(MSG_DEBUG, "No suitable AP found.");
692 timeout = wpa_s->scan_interval;
693 if (wpas_wps_searching(wpa_s)) {
705 if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
707 * Quick recovery if the initial scan results were not
708 * complete when fetched before the first scan request.
710 wpa_s->scan_res_tried++;
713 wpa_supplicant_req_scan(wpa_s, timeout, 0);
715 #endif /* CONFIG_NO_SCAN_PROCESSING */
718 static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
719 union wpa_event_data *data)
721 int l, len, found = 0, wpa_found, rsn_found;
724 wpa_printf(MSG_DEBUG, "Association info event");
725 if (data->assoc_info.req_ies)
726 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
727 data->assoc_info.req_ies_len);
728 if (data->assoc_info.resp_ies)
729 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
730 data->assoc_info.resp_ies_len);
731 if (data->assoc_info.beacon_ies)
732 wpa_hexdump(MSG_DEBUG, "beacon_ies",
733 data->assoc_info.beacon_ies,
734 data->assoc_info.beacon_ies_len);
736 p = data->assoc_info.req_ies;
737 l = data->assoc_info.req_ies_len;
739 /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
740 while (p && l >= 2) {
743 wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
747 if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
748 (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
749 (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
750 if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
753 wpa_find_assoc_pmkid(wpa_s);
759 if (!found && data->assoc_info.req_ies)
760 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
762 /* WPA/RSN IE from Beacon/ProbeResp */
763 p = data->assoc_info.beacon_ies;
764 l = data->assoc_info.beacon_ies_len;
766 /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
768 wpa_found = rsn_found = 0;
769 while (p && l >= 2) {
772 wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
777 p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
778 os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
780 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
784 p[0] == WLAN_EID_RSN && p[1] >= 2) {
786 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
794 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
796 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
797 if (wpa_found || rsn_found)
798 wpa_s->ap_ies_from_associnfo = 1;
802 static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
803 union wpa_event_data *data)
806 int ft_completed = wpa_ft_is_completed(wpa_s->wpa);
809 wpa_supplicant_event_associnfo(wpa_s, data);
811 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
812 if (wpa_s->use_client_mlme)
813 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
814 if (wpa_s->use_client_mlme ||
815 (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
816 os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
817 wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
818 MACSTR, MAC2STR(bssid));
819 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
820 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
821 if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
822 wpa_clear_keys(wpa_s, bssid);
824 if (wpa_supplicant_select_config(wpa_s) < 0) {
825 wpa_supplicant_disassociate(
826 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
831 wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
832 if (wpa_s->current_ssid) {
833 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
834 * initialized before association, but for other modes,
835 * initialize PC/SC here, if the current configuration needs
836 * smartcard or SIM/USIM. */
837 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
839 wpa_sm_notify_assoc(wpa_s->wpa, bssid);
840 l2_packet_notify_auth_start(wpa_s->l2);
843 * Set portEnabled first to FALSE in order to get EAP state machine out
844 * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
845 * state machine may transit to AUTHENTICATING state based on obsolete
846 * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
847 * AUTHENTICATED without ever giving chance to EAP state machine to
851 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
852 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
854 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
855 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
856 /* 802.1X::portControl = Auto */
857 eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
858 wpa_s->eapol_received = 0;
859 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
860 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
861 wpa_supplicant_cancel_auth_timeout(wpa_s);
862 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
863 } else if (!ft_completed) {
864 /* Timeout for receiving the first EAPOL packet */
865 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
867 wpa_supplicant_cancel_scan(wpa_s);
869 if (wpa_s->driver_4way_handshake &&
870 wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
872 * We are done; the driver will take care of RSN 4-way
875 wpa_supplicant_cancel_auth_timeout(wpa_s);
876 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
877 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
878 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
883 static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
887 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
889 * At least Host AP driver and a Prism3 card seemed to be
890 * generating streams of disconnected events when configuring
891 * IBSS for WPA-None. Ignore them for now.
893 wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
894 "IBSS/WPA-None mode");
898 if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
899 wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
900 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
901 "pre-shared key may be incorrect");
903 if (wpa_s->wpa_state >= WPA_ASSOCIATED)
904 wpa_supplicant_req_scan(wpa_s, 0, 100000);
905 bssid = wpa_s->bssid;
906 if (is_zero_ether_addr(bssid))
907 bssid = wpa_s->pending_bssid;
908 wpa_blacklist_add(wpa_s, bssid);
909 wpa_sm_notify_disassoc(wpa_s->wpa);
910 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
912 if (wpa_supplicant_dynamic_keys(wpa_s)) {
913 wpa_s->keys_cleared = 0;
914 wpa_clear_keys(wpa_s, wpa_s->bssid);
916 wpa_supplicant_mark_disassoc(wpa_s);
920 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
921 static void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx,
924 struct wpa_supplicant *wpa_s = eloop_ctx;
926 if (!wpa_s->pending_mic_error_report)
929 wpa_printf(MSG_DEBUG, "WPA: Sending pending MIC error report");
930 wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
931 wpa_s->pending_mic_error_report = 0;
933 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
937 wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
938 union wpa_event_data *data)
943 wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
944 pairwise = (data && data->michael_mic_failure.unicast);
946 if ((wpa_s->last_michael_mic_error &&
947 t.sec - wpa_s->last_michael_mic_error <= 60) ||
948 wpa_s->pending_mic_error_report) {
949 if (wpa_s->pending_mic_error_report) {
951 * Send the pending MIC error report immediately since
952 * we are going to start countermeasures and AP better
955 wpa_sm_key_request(wpa_s->wpa, 1,
956 wpa_s->pending_mic_error_pairwise);
959 /* Send the new MIC error report immediately since we are going
960 * to start countermeasures and AP better do the same.
962 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
964 /* initialize countermeasures */
965 wpa_s->countermeasures = 1;
966 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
969 * Need to wait for completion of request frame. We do not get
970 * any callback for the message completion, so just wait a
971 * short while and hope for the best. */
974 wpa_drv_set_countermeasures(wpa_s, 1);
975 wpa_supplicant_deauthenticate(wpa_s,
976 WLAN_REASON_MICHAEL_MIC_FAILURE);
977 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
979 eloop_register_timeout(60, 0,
980 wpa_supplicant_stop_countermeasures,
982 /* TODO: mark the AP rejected for 60 second. STA is
983 * allowed to associate with another AP.. */
985 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
986 if (wpa_s->mic_errors_seen) {
988 * Reduce the effectiveness of Michael MIC error
989 * reports as a means for attacking against TKIP if
990 * more than one MIC failure is noticed with the same
991 * PTK. We delay the transmission of the reports by a
992 * random time between 0 and 60 seconds in order to
993 * force the attacker wait 60 seconds before getting
994 * the information on whether a frame resulted in a MIC
1000 if (os_get_random(rval, sizeof(rval)) < 0)
1001 sec = os_random() % 60;
1003 sec = WPA_GET_BE32(rval) % 60;
1004 wpa_printf(MSG_DEBUG, "WPA: Delay MIC error report %d "
1006 wpa_s->pending_mic_error_report = 1;
1007 wpa_s->pending_mic_error_pairwise = pairwise;
1008 eloop_cancel_timeout(
1009 wpa_supplicant_delayed_mic_error_report,
1011 eloop_register_timeout(
1012 sec, os_random() % 1000000,
1013 wpa_supplicant_delayed_mic_error_report,
1016 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1018 #else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1019 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1020 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1022 wpa_s->last_michael_mic_error = t.sec;
1023 wpa_s->mic_errors_seen++;
1028 wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
1029 union wpa_event_data *data)
1031 if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
1034 switch (data->interface_status.ievent) {
1035 case EVENT_INTERFACE_ADDED:
1036 if (!wpa_s->interface_removed)
1038 wpa_s->interface_removed = 0;
1039 wpa_printf(MSG_DEBUG, "Configured interface was added.");
1040 if (wpa_supplicant_driver_init(wpa_s) < 0) {
1041 wpa_printf(MSG_INFO, "Failed to initialize the driver "
1042 "after interface was added.");
1045 case EVENT_INTERFACE_REMOVED:
1046 wpa_printf(MSG_DEBUG, "Configured interface was removed.");
1047 wpa_s->interface_removed = 1;
1048 wpa_supplicant_mark_disassoc(wpa_s);
1049 l2_packet_deinit(wpa_s->l2);
1056 #ifdef CONFIG_PEERKEY
1058 wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
1059 union wpa_event_data *data)
1063 wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
1065 #endif /* CONFIG_PEERKEY */
1068 #ifdef CONFIG_IEEE80211R
1070 wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
1071 union wpa_event_data *data)
1076 if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
1077 data->ft_ies.ies_len,
1078 data->ft_ies.ft_action,
1079 data->ft_ies.target_ap) < 0) {
1080 /* TODO: prevent MLME/driver from trying to associate? */
1083 #endif /* CONFIG_IEEE80211R */
1086 void wpa_supplicant_event(void *ctx, wpa_event_type event,
1087 union wpa_event_data *data)
1089 struct wpa_supplicant *wpa_s = ctx;
1093 wpa_supplicant_event_assoc(wpa_s, data);
1095 case EVENT_DISASSOC:
1096 wpa_supplicant_event_disassoc(wpa_s);
1098 case EVENT_MICHAEL_MIC_FAILURE:
1099 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
1101 #ifndef CONFIG_NO_SCAN_PROCESSING
1102 case EVENT_SCAN_RESULTS:
1103 wpa_supplicant_event_scan_results(wpa_s);
1105 #endif /* CONFIG_NO_SCAN_PROCESSING */
1106 case EVENT_ASSOCINFO:
1107 wpa_supplicant_event_associnfo(wpa_s, data);
1109 case EVENT_INTERFACE_STATUS:
1110 wpa_supplicant_event_interface_status(wpa_s, data);
1112 case EVENT_PMKID_CANDIDATE:
1113 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
1115 #ifdef CONFIG_PEERKEY
1116 case EVENT_STKSTART:
1117 wpa_supplicant_event_stkstart(wpa_s, data);
1119 #endif /* CONFIG_PEERKEY */
1120 #ifdef CONFIG_IEEE80211R
1121 case EVENT_FT_RESPONSE:
1122 wpa_supplicant_event_ft_response(wpa_s, data);
1124 #endif /* CONFIG_IEEE80211R */
1126 wpa_printf(MSG_INFO, "Unknown event %d", event);