Shuyi Chen | d7955ce | 2013-05-22 14:51:55 -0700 | [diff] [blame] | 1 | // Copyright (c) 2000-2004 Brian Wellington (bwelling@xbill.org) |
| 2 | |
| 3 | package org.xbill.DNS; |
| 4 | |
| 5 | import java.io.*; |
| 6 | |
| 7 | /** |
| 8 | * Name Authority Pointer Record - specifies rewrite rule, that when applied |
| 9 | * to an existing string will produce a new domain. |
| 10 | * |
| 11 | * @author Chuck Santos |
| 12 | */ |
| 13 | |
| 14 | public class NAPTRRecord extends Record { |
| 15 | |
| 16 | private static final long serialVersionUID = 5191232392044947002L; |
| 17 | |
| 18 | private int order, preference; |
| 19 | private byte [] flags, service, regexp; |
| 20 | private Name replacement; |
| 21 | |
| 22 | NAPTRRecord() {} |
| 23 | |
| 24 | Record |
| 25 | getObject() { |
| 26 | return new NAPTRRecord(); |
| 27 | } |
| 28 | |
| 29 | /** |
| 30 | * Creates an NAPTR Record from the given data |
| 31 | * @param order The order of this NAPTR. Records with lower order are |
| 32 | * preferred. |
| 33 | * @param preference The preference, used to select between records at the |
| 34 | * same order. |
| 35 | * @param flags The control aspects of the NAPTRRecord. |
| 36 | * @param service The service or protocol available down the rewrite path. |
| 37 | * @param regexp The regular/substitution expression. |
| 38 | * @param replacement The domain-name to query for the next DNS resource |
| 39 | * record, depending on the value of the flags field. |
| 40 | * @throws IllegalArgumentException One of the strings has invalid escapes |
| 41 | */ |
| 42 | public |
| 43 | NAPTRRecord(Name name, int dclass, long ttl, int order, int preference, |
| 44 | String flags, String service, String regexp, Name replacement) |
| 45 | { |
| 46 | super(name, Type.NAPTR, dclass, ttl); |
| 47 | this.order = checkU16("order", order); |
| 48 | this.preference = checkU16("preference", preference); |
| 49 | try { |
| 50 | this.flags = byteArrayFromString(flags); |
| 51 | this.service = byteArrayFromString(service); |
| 52 | this.regexp = byteArrayFromString(regexp); |
| 53 | } |
| 54 | catch (TextParseException e) { |
| 55 | throw new IllegalArgumentException(e.getMessage()); |
| 56 | } |
| 57 | this.replacement = checkName("replacement", replacement); |
| 58 | } |
| 59 | |
| 60 | void |
| 61 | rrFromWire(DNSInput in) throws IOException { |
| 62 | order = in.readU16(); |
| 63 | preference = in.readU16(); |
| 64 | flags = in.readCountedString(); |
| 65 | service = in.readCountedString(); |
| 66 | regexp = in.readCountedString(); |
| 67 | replacement = new Name(in); |
| 68 | } |
| 69 | |
| 70 | void |
| 71 | rdataFromString(Tokenizer st, Name origin) throws IOException { |
| 72 | order = st.getUInt16(); |
| 73 | preference = st.getUInt16(); |
| 74 | try { |
| 75 | flags = byteArrayFromString(st.getString()); |
| 76 | service = byteArrayFromString(st.getString()); |
| 77 | regexp = byteArrayFromString(st.getString()); |
| 78 | } |
| 79 | catch (TextParseException e) { |
| 80 | throw st.exception(e.getMessage()); |
| 81 | } |
| 82 | replacement = st.getName(origin); |
| 83 | } |
| 84 | |
| 85 | /** Converts rdata to a String */ |
| 86 | String |
| 87 | rrToString() { |
| 88 | StringBuffer sb = new StringBuffer(); |
| 89 | sb.append(order); |
| 90 | sb.append(" "); |
| 91 | sb.append(preference); |
| 92 | sb.append(" "); |
| 93 | sb.append(byteArrayToString(flags, true)); |
| 94 | sb.append(" "); |
| 95 | sb.append(byteArrayToString(service, true)); |
| 96 | sb.append(" "); |
| 97 | sb.append(byteArrayToString(regexp, true)); |
| 98 | sb.append(" "); |
| 99 | sb.append(replacement); |
| 100 | return sb.toString(); |
| 101 | } |
| 102 | |
| 103 | /** Returns the order */ |
| 104 | public int |
| 105 | getOrder() { |
| 106 | return order; |
| 107 | } |
| 108 | |
| 109 | /** Returns the preference */ |
| 110 | public int |
| 111 | getPreference() { |
| 112 | return preference; |
| 113 | } |
| 114 | |
| 115 | /** Returns flags */ |
| 116 | public String |
| 117 | getFlags() { |
| 118 | return byteArrayToString(flags, false); |
| 119 | } |
| 120 | |
| 121 | /** Returns service */ |
| 122 | public String |
| 123 | getService() { |
| 124 | return byteArrayToString(service, false); |
| 125 | } |
| 126 | |
| 127 | /** Returns regexp */ |
| 128 | public String |
| 129 | getRegexp() { |
| 130 | return byteArrayToString(regexp, false); |
| 131 | } |
| 132 | |
| 133 | /** Returns the replacement domain-name */ |
| 134 | public Name |
| 135 | getReplacement() { |
| 136 | return replacement; |
| 137 | } |
| 138 | |
| 139 | void |
| 140 | rrToWire(DNSOutput out, Compression c, boolean canonical) { |
| 141 | out.writeU16(order); |
| 142 | out.writeU16(preference); |
| 143 | out.writeCountedString(flags); |
| 144 | out.writeCountedString(service); |
| 145 | out.writeCountedString(regexp); |
| 146 | replacement.toWire(out, null, canonical); |
| 147 | } |
| 148 | |
| 149 | public Name |
| 150 | getAdditionalName() { |
| 151 | return replacement; |
| 152 | } |
| 153 | |
| 154 | } |