Shuyi Chen | d7955ce | 2013-05-22 14:51:55 -0700 | [diff] [blame] | 1 | // Copyright (c) 1999-2004 Brian Wellington (bwelling@xbill.org) |
| 2 | |
| 3 | package org.xbill.DNS; |
| 4 | |
| 5 | import java.io.*; |
| 6 | |
| 7 | /** |
| 8 | * Next SECure name - this record contains the following name in an |
| 9 | * ordered list of names in the zone, and a set of types for which |
| 10 | * records exist for this name. The presence of this record in a response |
| 11 | * signifies a negative response from a DNSSEC-signed zone. |
| 12 | * |
| 13 | * This replaces the NXT record. |
| 14 | * |
| 15 | * @author Brian Wellington |
| 16 | * @author David Blacka |
| 17 | */ |
| 18 | |
| 19 | public class NSECRecord extends Record { |
| 20 | |
| 21 | private static final long serialVersionUID = -5165065768816265385L; |
| 22 | |
| 23 | private Name next; |
| 24 | private TypeBitmap types; |
| 25 | |
| 26 | NSECRecord() {} |
| 27 | |
| 28 | Record |
| 29 | getObject() { |
| 30 | return new NSECRecord(); |
| 31 | } |
| 32 | |
| 33 | /** |
| 34 | * Creates an NSEC Record from the given data. |
| 35 | * @param next The following name in an ordered list of the zone |
| 36 | * @param types An array containing the types present. |
| 37 | */ |
| 38 | public |
| 39 | NSECRecord(Name name, int dclass, long ttl, Name next, int [] types) { |
| 40 | super(name, Type.NSEC, dclass, ttl); |
| 41 | this.next = checkName("next", next); |
| 42 | for (int i = 0; i < types.length; i++) { |
| 43 | Type.check(types[i]); |
| 44 | } |
| 45 | this.types = new TypeBitmap(types); |
| 46 | } |
| 47 | |
| 48 | void |
| 49 | rrFromWire(DNSInput in) throws IOException { |
| 50 | next = new Name(in); |
| 51 | types = new TypeBitmap(in); |
| 52 | } |
| 53 | |
| 54 | void |
| 55 | rrToWire(DNSOutput out, Compression c, boolean canonical) { |
| 56 | // Note: The next name is not lowercased. |
| 57 | next.toWire(out, null, false); |
| 58 | types.toWire(out); |
| 59 | } |
| 60 | |
| 61 | void |
| 62 | rdataFromString(Tokenizer st, Name origin) throws IOException { |
| 63 | next = st.getName(origin); |
| 64 | types = new TypeBitmap(st); |
| 65 | } |
| 66 | |
| 67 | /** Converts rdata to a String */ |
| 68 | String |
| 69 | rrToString() |
| 70 | { |
| 71 | StringBuffer sb = new StringBuffer(); |
| 72 | sb.append(next); |
| 73 | if (!types.empty()) { |
| 74 | sb.append(' '); |
| 75 | sb.append(types.toString()); |
| 76 | } |
| 77 | return sb.toString(); |
| 78 | } |
| 79 | |
| 80 | /** Returns the next name */ |
| 81 | public Name |
| 82 | getNext() { |
| 83 | return next; |
| 84 | } |
| 85 | |
| 86 | /** Returns the set of types defined for this name */ |
| 87 | public int [] |
| 88 | getTypes() { |
| 89 | return types.toArray(); |
| 90 | } |
| 91 | |
| 92 | /** Returns whether a specific type is in the set of types. */ |
| 93 | public boolean |
| 94 | hasType(int type) { |
| 95 | return types.contains(type); |
| 96 | } |
| 97 | |
| 98 | } |