nl.sidn.dnslib.message.records.AAAAResourceRecord.java Source code

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Here is the source code for nl.sidn.dnslib.message.records.AAAAResourceRecord.java

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/*
 * ENTRADA, a big data platform for network data analytics
 *
 * Copyright (C) 2016 SIDN [https://www.sidn.nl]
 * 
 * This file is part of ENTRADA.
 * 
 * ENTRADA is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * ENTRADA is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with ENTRADA.  If not, see [<http://www.gnu.org/licenses/].
 *
 */
package nl.sidn.dnslib.message.records;

import java.net.InetAddress;
import java.net.UnknownHostException;

import javax.json.Json;
import javax.json.JsonObject;
import javax.json.JsonObjectBuilder;

import com.google.common.net.InetAddresses;

import nl.sidn.dnslib.message.util.NetworkData;

public class AAAAResourceRecord extends AbstractResourceRecord {

    private static final long serialVersionUID = 1L;
    /*
         
     A 128 bit IPv6 address is encoded in the data portion of an AAAA
       resource record in network byte order (high-order byte first).
        
     */

    private String address;
    private byte[] ipv6Bytes;

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public void decode(NetworkData buffer) {
        super.decode(buffer);

        //get the 16 raw bytes for the ipv6 address
        ipv6Bytes = new byte[16];
        buffer.readBytes(ipv6Bytes);

        //create a textual representation of the address
        InetAddress ipv6Addres;
        try {
            ipv6Addres = InetAddress.getByAddress(ipv6Bytes);
        } catch (UnknownHostException e) {
            throw new RuntimeException("Illegal ipv6 address", e);
        }

        setAddress(InetAddresses.toAddrString(ipv6Addres));
    }

    @Override
    public void encode(NetworkData buffer) {
        super.encode(buffer);

        //write rdlength
        buffer.writeChar(rdLength);

        buffer.writeBytes(ipv6Bytes);
    }

    @Override
    public String toString() {
        return super.toString() + " AAAAResourceRecord [address=" + address + "]";
    }

    public String getCacheId() {
        return address;
    }

    @Override
    public String toZone(int maxLength) {
        return super.toZone(maxLength) + "\t" + address;
    }

    @Override
    public JsonObject toJSon() {
        JsonObjectBuilder builder = super.createJsonBuilder();
        return builder.add("rdata", Json.createObjectBuilder().add("address", address)).build();
    }

}