Shuyi Chen | d7955ce | 2013-05-22 14:51:55 -0700 | [diff] [blame] | 1 | // Copyright (c) 2004 Brian Wellington (bwelling@xbill.org) |
| 2 | |
| 3 | package org.xbill.DNS; |
| 4 | |
| 5 | import java.io.*; |
| 6 | |
| 7 | /** |
| 8 | * The NULL Record. This has no defined purpose, but can be used to |
| 9 | * hold arbitrary data. |
| 10 | * |
| 11 | * @author Brian Wellington |
| 12 | */ |
| 13 | |
| 14 | public class NULLRecord extends Record { |
| 15 | |
| 16 | private static final long serialVersionUID = -5796493183235216538L; |
| 17 | |
| 18 | private byte [] data; |
| 19 | |
| 20 | NULLRecord() {} |
| 21 | |
| 22 | Record |
| 23 | getObject() { |
| 24 | return new NULLRecord(); |
| 25 | } |
| 26 | |
| 27 | /** |
| 28 | * Creates a NULL record from the given data. |
| 29 | * @param data The contents of the record. |
| 30 | */ |
| 31 | public |
| 32 | NULLRecord(Name name, int dclass, long ttl, byte [] data) { |
| 33 | super(name, Type.NULL, dclass, ttl); |
| 34 | |
| 35 | if (data.length > 0xFFFF) { |
| 36 | throw new IllegalArgumentException("data must be <65536 bytes"); |
| 37 | } |
| 38 | this.data = data; |
| 39 | } |
| 40 | |
| 41 | void |
| 42 | rrFromWire(DNSInput in) throws IOException { |
| 43 | data = in.readByteArray(); |
| 44 | } |
| 45 | |
| 46 | void |
| 47 | rdataFromString(Tokenizer st, Name origin) throws IOException { |
| 48 | throw st.exception("no defined text format for NULL records"); |
| 49 | } |
| 50 | |
| 51 | String |
| 52 | rrToString() { |
| 53 | return unknownToString(data); |
| 54 | } |
| 55 | |
| 56 | /** Returns the contents of this record. */ |
| 57 | public byte [] |
| 58 | getData() { |
| 59 | return data; |
| 60 | } |
| 61 | |
| 62 | void |
| 63 | rrToWire(DNSOutput out, Compression c, boolean canonical) { |
| 64 | out.writeByteArray(data); |
| 65 | } |
| 66 | |
| 67 | } |