| /**************************************************************** |
| * 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. * |
| ****************************************************************/ |
| |
| |
| package org.apache.james.jspf.terms; |
| |
| import org.apache.james.jspf.core.DNSLookupContinuation; |
| import org.apache.james.jspf.core.DNSRequest; |
| import org.apache.james.jspf.core.DNSResponse; |
| import org.apache.james.jspf.core.IPAddr; |
| import org.apache.james.jspf.core.MacroExpand; |
| import org.apache.james.jspf.core.SPFChecker; |
| import org.apache.james.jspf.core.SPFCheckerDNSResponseListener; |
| import org.apache.james.jspf.core.SPFSession; |
| import org.apache.james.jspf.core.SPFTermsRegexps; |
| import org.apache.james.jspf.core.exceptions.NeutralException; |
| import org.apache.james.jspf.core.exceptions.NoneException; |
| import org.apache.james.jspf.core.exceptions.PermErrorException; |
| import org.apache.james.jspf.core.exceptions.TempErrorException; |
| import org.apache.james.jspf.core.exceptions.TimeoutException; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * This class represent the mx mechanism |
| * |
| */ |
| public class MXMechanism extends AMechanism implements SPFCheckerDNSResponseListener { |
| |
| private final class ExpandedChecker implements SPFChecker { |
| |
| /** |
| * @see org.apache.james.jspf.core.SPFChecker#checkSPF(org.apache.james.jspf.core.SPFSession) |
| */ |
| public DNSLookupContinuation checkSPF(SPFSession spfData) throws PermErrorException, |
| TempErrorException, NeutralException, NoneException { |
| |
| // Get the right host. |
| String host = expandHost(spfData); |
| |
| return new DNSLookupContinuation(new DNSRequest(host, DNSRequest.MX), MXMechanism.this); |
| } |
| } |
| |
| private static final String ATTRIBUTE_MX_RECORDS = "MXMechanism.mxRecords"; |
| private static final String ATTRIBUTE_CHECK_RECORDS = "MXMechanism.checkRecords"; |
| /** |
| * ABNF: MX = "mx" [ ":" domain-spec ] [ dual-cidr-length ] |
| */ |
| public static final String REGEX = "[mM][xX]" + "(?:\\:" |
| + SPFTermsRegexps.DOMAIN_SPEC_REGEX + ")?" + "(?:" |
| + DUAL_CIDR_LENGTH_REGEX + ")?"; |
| |
| private SPFChecker expandedChecker = new ExpandedChecker(); |
| |
| /** |
| * @see org.apache.james.jspf.terms.AMechanism#checkSPF(org.apache.james.jspf.core.SPFSession) |
| */ |
| public DNSLookupContinuation checkSPF(SPFSession spfData) throws PermErrorException, |
| TempErrorException, NeutralException, NoneException{ |
| |
| // update currentDepth |
| spfData.increaseCurrentDepth(); |
| |
| spfData.pushChecker(expandedChecker); |
| return macroExpand.checkExpand(getDomain(), spfData, MacroExpand.DOMAIN); |
| } |
| |
| /** |
| * @see org.apache.james.jspf.terms.AMechanism#onDNSResponse(org.apache.james.jspf.core.DNSResponse, org.apache.james.jspf.core.SPFSession) |
| */ |
| @SuppressWarnings("unchecked") |
| public DNSLookupContinuation onDNSResponse(DNSResponse response, SPFSession spfSession) |
| throws PermErrorException, TempErrorException, NoneException, NeutralException { |
| try { |
| |
| List<String> records = (List<String>) spfSession.getAttribute(ATTRIBUTE_CHECK_RECORDS); |
| List<String> mxR = (List<String>) spfSession.getAttribute(ATTRIBUTE_MX_RECORDS); |
| |
| if (records == null) { |
| |
| records = response.getResponse(); |
| |
| if (records == null) { |
| // no mx record found |
| spfSession.setAttribute(Directive.ATTRIBUTE_MECHANISM_RESULT, Boolean.FALSE); |
| return null; |
| } |
| |
| spfSession.setAttribute(ATTRIBUTE_CHECK_RECORDS, records); |
| |
| } else { |
| |
| List<String> res = response.getResponse(); |
| |
| if (res != null) { |
| if (mxR == null) { |
| mxR = new ArrayList<String>(); |
| spfSession.setAttribute(ATTRIBUTE_MX_RECORDS, mxR); |
| } |
| mxR.addAll(res); |
| } |
| |
| } |
| |
| // if the remote IP is an ipv6 we check ipv6 addresses, otherwise ip4 |
| boolean isIPv6 = IPAddr.isIPV6(spfSession.getIpAddress()); |
| |
| String mx; |
| while (records.size() > 0 && (mx = records.remove(0)) != null && mx.length() > 0) { |
| log.debug("Add MX-Record " + mx + " to list"); |
| |
| return new DNSLookupContinuation(new DNSRequest(mx, isIPv6 ? DNSRequest.AAAA : DNSRequest.A), MXMechanism.this); |
| |
| } |
| |
| // no mx record found |
| if (mxR == null || mxR.size() == 0) { |
| spfSession.setAttribute(Directive.ATTRIBUTE_MECHANISM_RESULT, Boolean.FALSE); |
| return null; |
| } |
| |
| // get the ipAddress |
| IPAddr checkAddress; |
| checkAddress = IPAddr.getAddress(spfSession.getIpAddress(), isIPv6 ? getIp6cidr() : getIp4cidr()); |
| |
| // clean up attributes |
| spfSession.removeAttribute(ATTRIBUTE_CHECK_RECORDS); |
| spfSession.removeAttribute(ATTRIBUTE_MX_RECORDS); |
| spfSession.setAttribute(Directive.ATTRIBUTE_MECHANISM_RESULT, Boolean.valueOf(checkAddressList(checkAddress, mxR, getIp4cidr()))); |
| return null; |
| |
| } catch (TimeoutException e) { |
| spfSession.setAttribute(ATTRIBUTE_CHECK_RECORDS, null); |
| spfSession.setAttribute(ATTRIBUTE_MX_RECORDS, null); |
| throw new TempErrorException("Timeout querying the dns server"); |
| } |
| } |
| |
| /** |
| * @see org.apache.james.jspf.terms.AMechanism#toString() |
| */ |
| public String toString() { |
| return super.toString("mx"); |
| } |
| |
| } |