Merge remote-tracking branch 'origin/debian' into debian

[mech_eap.git] / libeap / src / ap / tkip_countermeasures.c

diff --git a/libeap/src/ap/tkip_countermeasures.c b/libeap/src/ap/tkip_countermeasures.c
new file mode 100644 (file)
index 0000000..4725e2b
--- /dev/null
+++ b/libeap/src/ap/tkip_countermeasures.c
@@ -0,0 +1,105 @@
+/*
+ * hostapd / TKIP countermeasures
+ * Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi>
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include "utils/includes.h"
+
+#include "utils/common.h"
+#include "utils/eloop.h"
+#include "common/ieee802_11_defs.h"
+#include "radius/radius.h"
+#include "hostapd.h"
+#include "sta_info.h"
+#include "ap_mlme.h"
+#include "wpa_auth.h"
+#include "ap_drv_ops.h"
+#include "tkip_countermeasures.h"
+
+
+static void ieee80211_tkip_countermeasures_stop(void *eloop_ctx,
+                                               void *timeout_ctx)
+{
+       struct hostapd_data *hapd = eloop_ctx;
+       hapd->tkip_countermeasures = 0;
+       hostapd_drv_set_countermeasures(hapd, 0);
+       hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
+                      HOSTAPD_LEVEL_INFO, "TKIP countermeasures ended");
+}
+
+
+static void ieee80211_tkip_countermeasures_start(struct hostapd_data *hapd)
+{
+       struct sta_info *sta;
+
+       hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
+                      HOSTAPD_LEVEL_INFO, "TKIP countermeasures initiated");
+
+       wpa_auth_countermeasures_start(hapd->wpa_auth);
+       hapd->tkip_countermeasures = 1;
+       hostapd_drv_set_countermeasures(hapd, 1);
+       wpa_gtk_rekey(hapd->wpa_auth);
+       eloop_cancel_timeout(ieee80211_tkip_countermeasures_stop, hapd, NULL);
+       eloop_register_timeout(60, 0, ieee80211_tkip_countermeasures_stop,
+                              hapd, NULL);
+       while ((sta = hapd->sta_list)) {
+               sta->acct_terminate_cause =
+                       RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_RESET;
+               if (sta->flags & WLAN_STA_AUTH) {
+                       mlme_deauthenticate_indication(
+                               hapd, sta,
+                               WLAN_REASON_MICHAEL_MIC_FAILURE);
+               }
+               hostapd_drv_sta_deauth(hapd, sta->addr,
+                                      WLAN_REASON_MICHAEL_MIC_FAILURE);
+               ap_free_sta(hapd, sta);
+       }
+}
+
+
+void ieee80211_tkip_countermeasures_deinit(struct hostapd_data *hapd)
+{
+       eloop_cancel_timeout(ieee80211_tkip_countermeasures_stop, hapd, NULL);
+}
+
+
+int michael_mic_failure(struct hostapd_data *hapd, const u8 *addr, int local)
+{
+       struct os_reltime now;
+       int ret = 0;
+
+       if (addr && local) {
+               struct sta_info *sta = ap_get_sta(hapd, addr);
+               if (sta != NULL) {
+                       wpa_auth_sta_local_mic_failure_report(sta->wpa_sm);
+                       hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
+                                      HOSTAPD_LEVEL_INFO,
+                                      "Michael MIC failure detected in "
+                                      "received frame");
+                       mlme_michaelmicfailure_indication(hapd, addr);
+               } else {
+                       wpa_printf(MSG_DEBUG,
+                                  "MLME-MICHAELMICFAILURE.indication "
+                                  "for not associated STA (" MACSTR
+                                  ") ignored", MAC2STR(addr));
+                       return ret;
+               }
+       }
+
+       os_get_reltime(&now);
+       if (os_reltime_expired(&now, &hapd->michael_mic_failure, 60)) {
+               hapd->michael_mic_failures = 1;
+       } else {
+               hapd->michael_mic_failures++;
+               if (hapd->michael_mic_failures > 1) {
+                       ieee80211_tkip_countermeasures_start(hapd);
+                       ret = 1;
+               }
+       }
+       hapd->michael_mic_failure = now;
+
+       return ret;
+}