<?php

/*
 * Calculate the effective registered domain of a fully qualified domain name.
 *
 * <@LICENSE>
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to you under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * </@LICENSE>
 *
 * Florian Sager, 25.07.2008, sager@agitos.de, http://www.agitos.de
 */

/*
 * Remove subdomains from a signing domain to get the registered domain.
 *
 * dkim-reputation.org blocks signing domains on the level of registered domains
 * to rate senders who use e.g. a.spamdomain.tld, b.spamdomain.tld, ... under
 * the most common identifier - the registered domain - finally.
 *
 * This function returns NULL if $signingDomain is TLD itself
 * 
 * $signingDomain has to be provided lowercase (!)
 */

/* pull in class */
require_once(dirname(__FILE__) . '/regDomain.class.php');

/* create global object */
$regDomainObj = new regDomain;

function getRegisteredDomain($signingDomain, $fallback = TRUE) {
	/* pull in object */
	global $regDomainObj;
	/* return object method */
	return $regDomainObj->getRegisteredDomain($signingDomain, $fallback);
}

function validDomainPart($domPart) {
	/* pull in object */
	global $regDomainObj;
	/* return object method */
	return $regDomainObj->validDomainPart($domPart);
}

// recursive helper method
function findRegisteredDomain($remainingSigningDomainParts, &$treeNode) {
	/* pull in object */
	global $regDomainObj;
	/* return object method */
	return $regDomainObj->findRegisteredDomain($remainingSigningDomainParts, $treeNode);
}

?>
