hostapd: Add logging around Michael MIC related failures

This can help one understand better why stations are failing
to authentication/associate.

Signed-off-by: Ben Greear <greearb@candelatech.com>

src/ap/ieee802_11.c

@@ -1729,6 +1729,8 @@ static void handle_auth(struct hostapd_data *hapd,
 #endif /* CONFIG_NO_RC4 */
 
 	if (hapd->tkip_countermeasures) {
+		wpa_printf(MSG_DEBUG,
+			   "Ongoing TKIP countermeasures (Michael MIC failure) - reject authentication");
 		resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
 		goto fail;
 	}

src/ap/tkip_countermeasures.c

@@ -71,6 +71,11 @@ int michael_mic_failure(struct hostapd_data *hapd, const u8 *addr, int local)
 	struct os_reltime now;
 	int ret = 0;
 
+	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
+		       HOSTAPD_LEVEL_INFO,
+		       "Michael MIC failure detected in received frame%s",
+		       local ? " (local)" : "");
+
 	if (addr && local) {
 		struct sta_info *sta = ap_get_sta(hapd, addr);
 		if (sta != NULL) {