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 | * X25 - identifies the PSDN (Public Switched Data Network) address in the |
| 9 | * X.121 numbering plan associated with a name. |
| 10 | * |
| 11 | * @author Brian Wellington |
| 12 | */ |
| 13 | |
| 14 | public class X25Record extends Record { |
| 15 | |
| 16 | private static final long serialVersionUID = 4267576252335579764L; |
| 17 | |
| 18 | private byte [] address; |
| 19 | |
| 20 | X25Record() {} |
| 21 | |
| 22 | Record |
| 23 | getObject() { |
| 24 | return new X25Record(); |
| 25 | } |
| 26 | |
| 27 | private static final byte [] |
| 28 | checkAndConvertAddress(String address) { |
| 29 | int length = address.length(); |
| 30 | byte [] out = new byte [length]; |
| 31 | for (int i = 0; i < length; i++) { |
| 32 | char c = address.charAt(i); |
| 33 | if (!Character.isDigit(c)) |
| 34 | return null; |
| 35 | out[i] = (byte) c; |
| 36 | } |
| 37 | return out; |
| 38 | } |
| 39 | |
| 40 | /** |
| 41 | * Creates an X25 Record from the given data |
| 42 | * @param address The X.25 PSDN address. |
| 43 | * @throws IllegalArgumentException The address is not a valid PSDN address. |
| 44 | */ |
| 45 | public |
| 46 | X25Record(Name name, int dclass, long ttl, String address) { |
| 47 | super(name, Type.X25, dclass, ttl); |
| 48 | this.address = checkAndConvertAddress(address); |
| 49 | if (this.address == null) { |
| 50 | throw new IllegalArgumentException("invalid PSDN address " + |
| 51 | address); |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | void |
| 56 | rrFromWire(DNSInput in) throws IOException { |
| 57 | address = in.readCountedString(); |
| 58 | } |
| 59 | |
| 60 | void |
| 61 | rdataFromString(Tokenizer st, Name origin) throws IOException { |
| 62 | String addr = st.getString(); |
| 63 | this.address = checkAndConvertAddress(addr); |
| 64 | if (this.address == null) |
| 65 | throw st.exception("invalid PSDN address " + addr); |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * Returns the X.25 PSDN address. |
| 70 | */ |
| 71 | public String |
| 72 | getAddress() { |
| 73 | return byteArrayToString(address, false); |
| 74 | } |
| 75 | |
| 76 | void |
| 77 | rrToWire(DNSOutput out, Compression c, boolean canonical) { |
| 78 | out.writeCountedString(address); |
| 79 | } |
| 80 | |
| 81 | String |
| 82 | rrToString() { |
| 83 | return byteArrayToString(address, true); |
| 84 | } |
| 85 | |
| 86 | } |