2 * hostapd / TKIP countermeasures
3 * Copyright (c) 2002-2009, 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.
15 #include "utils/includes.h"
17 #include "utils/common.h"
18 #include "utils/eloop.h"
19 #include "common/ieee802_11_defs.h"
24 #include "tkip_countermeasures.h"
27 static void ieee80211_tkip_countermeasures_stop(void *eloop_ctx,
30 struct hostapd_data *hapd = eloop_ctx;
31 hapd->tkip_countermeasures = 0;
32 hapd->drv.set_countermeasures(hapd, 0);
33 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
34 HOSTAPD_LEVEL_INFO, "TKIP countermeasures ended");
38 static void ieee80211_tkip_countermeasures_start(struct hostapd_data *hapd)
42 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
43 HOSTAPD_LEVEL_INFO, "TKIP countermeasures initiated");
45 wpa_auth_countermeasures_start(hapd->wpa_auth);
46 hapd->tkip_countermeasures = 1;
47 hapd->drv.set_countermeasures(hapd, 1);
48 wpa_gtk_rekey(hapd->wpa_auth);
49 eloop_cancel_timeout(ieee80211_tkip_countermeasures_stop, hapd, NULL);
50 eloop_register_timeout(60, 0, ieee80211_tkip_countermeasures_stop,
52 for (sta = hapd->sta_list; sta != NULL; sta = sta->next) {
53 hapd->drv.sta_deauth(hapd, sta->addr,
54 WLAN_REASON_MICHAEL_MIC_FAILURE);
55 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
57 hapd->drv.sta_remove(hapd, sta->addr);
62 void michael_mic_failure(struct hostapd_data *hapd, const u8 *addr, int local)
67 struct sta_info *sta = ap_get_sta(hapd, addr);
69 wpa_auth_sta_local_mic_failure_report(sta->wpa_sm);
70 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
72 "Michael MIC failure detected in "
74 mlme_michaelmicfailure_indication(hapd, addr);
77 "MLME-MICHAELMICFAILURE.indication "
78 "for not associated STA (" MACSTR
79 ") ignored", MAC2STR(addr));
85 if (now > hapd->michael_mic_failure + 60) {
86 hapd->michael_mic_failures = 1;
88 hapd->michael_mic_failures++;
89 if (hapd->michael_mic_failures > 1)
90 ieee80211_tkip_countermeasures_start(hapd);
92 hapd->michael_mic_failure = now;