1 // Copyright (c) 2004 Brian Wellington (bwelling (at) 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 } 87
