001/* 002 * Copyright 2015-2020 the original author or authors 003 * 004 * This software is licensed under the Apache License, Version 2.0, 005 * the GNU Lesser General Public License version 2 or later ("LGPL") 006 * and the WTFPL. 007 * You may choose either license to govern your use of this software only 008 * upon the condition that you accept all of the terms of either 009 * the Apache License 2.0, the LGPL 2.1+ or the WTFPL. 010 */ 011package org.minidns.record; 012 013import java.io.DataInputStream; 014import java.io.IOException; 015import java.net.Inet4Address; 016 017import org.minidns.record.Record.TYPE; 018import org.minidns.util.InetAddressUtil; 019 020/** 021 * A record payload (ip pointer). 022 */ 023public class A extends InternetAddressRR<Inet4Address> { 024 025 @Override 026 public TYPE getType() { 027 return TYPE.A; 028 } 029 030 public A(Inet4Address inet4Address) { 031 super(inet4Address); 032 assert ip.length == 4; 033 } 034 035 public A(int q1, int q2, int q3, int q4) { 036 super(new byte[] { (byte) q1, (byte) q2, (byte) q3, (byte) q4 }); 037 if (q1 < 0 || q1 > 255 || q2 < 0 || q2 > 255 || q3 < 0 || q3 > 255 || q4 < 0 || q4 > 255) { 038 throw new IllegalArgumentException(); 039 } 040 } 041 042 public A(byte[] ip) { 043 super(ip); 044 if (ip.length != 4) { 045 throw new IllegalArgumentException("IPv4 address in A record is always 4 byte"); 046 } 047 } 048 049 public A(CharSequence ipv4CharSequence) { 050 this(InetAddressUtil.ipv4From(ipv4CharSequence)); 051 } 052 053 public static A parse(DataInputStream dis) 054 throws IOException { 055 byte[] ip = new byte[4]; 056 dis.readFully(ip); 057 return new A(ip); 058 } 059 060 @Override 061 public String toString() { 062 return Integer.toString(ip[0] & 0xff) + "." + 063 Integer.toString(ip[1] & 0xff) + "." + 064 Integer.toString(ip[2] & 0xff) + "." + 065 Integer.toString(ip[3] & 0xff); 066 } 067 068}