001 /**************************************************************** 002 * Licensed to the Apache Software Foundation (ASF) under one * 003 * or more contributor license agreements. See the NOTICE file * 004 * distributed with this work for additional information * 005 * regarding copyright ownership. The ASF licenses this file * 006 * to you under the Apache License, Version 2.0 (the * 007 * "License"); you may not use this file except in compliance * 008 * with the License. You may obtain a copy of the License at * 009 * * 010 * http://www.apache.org/licenses/LICENSE-2.0 * 011 * * 012 * Unless required by applicable law or agreed to in writing, * 013 * software distributed under the License is distributed on an * 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * 015 * KIND, either express or implied. See the License for the * 016 * specific language governing permissions and limitations * 017 * under the License. * 018 ****************************************************************/ 019 020 021 package org.apache.james.jspf.terms; 022 023 import org.apache.james.jspf.core.DNSLookupContinuation; 024 import org.apache.james.jspf.core.DNSRequest; 025 import org.apache.james.jspf.core.DNSResponse; 026 import org.apache.james.jspf.core.MacroExpand; 027 import org.apache.james.jspf.core.SPFChecker; 028 import org.apache.james.jspf.core.SPFCheckerDNSResponseListener; 029 import org.apache.james.jspf.core.SPFSession; 030 import org.apache.james.jspf.core.SPFTermsRegexps; 031 import org.apache.james.jspf.core.exceptions.NeutralException; 032 import org.apache.james.jspf.core.exceptions.NoneException; 033 import org.apache.james.jspf.core.exceptions.PermErrorException; 034 import org.apache.james.jspf.core.exceptions.TempErrorException; 035 import org.apache.james.jspf.core.exceptions.TimeoutException; 036 037 import java.util.List; 038 039 /** 040 * This class represent the exists mechanism 041 */ 042 public class ExistsMechanism extends GenericMechanism implements SPFCheckerDNSResponseListener { 043 044 private final class ExpandedChecker implements SPFChecker { 045 046 /* 047 * (non-Javadoc) 048 * @see org.apache.james.jspf.core.SPFChecker#checkSPF(org.apache.james.jspf.core.SPFSession) 049 */ 050 public DNSLookupContinuation checkSPF(SPFSession spfData) throws PermErrorException, 051 TempErrorException, NeutralException, NoneException { 052 String host = expandHost(spfData); 053 return new DNSLookupContinuation(new DNSRequest(host,DNSRequest.A), ExistsMechanism.this); 054 } 055 } 056 057 /** 058 * ABNF: exists = "exists" ":" domain-spec 059 */ 060 public static final String REGEX = "[eE][xX][iI][sS][tT][sS]" + "\\:" 061 + SPFTermsRegexps.DOMAIN_SPEC_REGEX; 062 063 private SPFChecker expandedChecker = new ExpandedChecker(); 064 065 /** 066 * @see org.apache.james.jspf.core.SPFChecker#checkSPF(org.apache.james.jspf.core.SPFSession) 067 */ 068 public DNSLookupContinuation checkSPF(SPFSession spfData) throws PermErrorException, 069 TempErrorException, NeutralException, NoneException { 070 // update currentDepth 071 spfData.increaseCurrentDepth(); 072 073 spfData.pushChecker(expandedChecker); 074 return macroExpand.checkExpand(getDomain(), spfData, MacroExpand.DOMAIN); 075 } 076 077 /** 078 * @see org.apache.james.jspf.core.SPFCheckerDNSResponseListener#onDNSResponse(org.apache.james.jspf.core.DNSResponse, org.apache.james.jspf.core.SPFSession) 079 */ 080 public DNSLookupContinuation onDNSResponse(DNSResponse response, SPFSession spfSession) throws PermErrorException, TempErrorException { 081 List<String> aRecords; 082 083 try { 084 aRecords = response.getResponse(); 085 } catch (TimeoutException e) { 086 spfSession.setAttribute(Directive.ATTRIBUTE_MECHANISM_RESULT, Boolean.FALSE); 087 return null; 088 } 089 090 if (aRecords != null && aRecords.size() > 0) { 091 spfSession.setAttribute(Directive.ATTRIBUTE_MECHANISM_RESULT, Boolean.TRUE); 092 return null; 093 } 094 095 // No match found 096 spfSession.setAttribute(Directive.ATTRIBUTE_MECHANISM_RESULT, Boolean.FALSE); 097 return null; 098 } 099 100 /** 101 * @see java.lang.Object#toString() 102 */ 103 public String toString() { 104 return "exists:"+getDomain(); 105 } 106 107 }