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 * Copyright (c) 2010, j. montgomery                                  *
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using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

namespace DnDns.Records
{
    /// <summary>
    /// RFC 1035:
    /// 
    /// 3.4.1. A RDATA format
    ///  +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
    ///  |                    ADDRESS                    |
    ///  +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
    ///  
    ///  where:
    ///  
    ///  ADDRESS         A 32 bit Internet address.
    ///  
    ///  Hosts that have multiple Internet addresses will have multiple A
    ///  records.
    ///  
    ///  A records cause no additional section processing.  The RDATA section of
    ///  an A line in a master file is an Internet address expressed as four
    ///  decimal numbers separated by dots without any imbedded spaces (e.g.,
    ///  "10.2.0.52" or "192.0.5.6").
    /// 
    /// </summary>
    public sealed class ARecord : DnsRecordBase, IDnsRecord
    {
        private string _hostAddress;

        /// <summary>
        /// The answer host address for the DNS A Record.
        /// </summary>
        public string HostAddress
        {
            get { return _hostAddress; }
        }

        internal ARecord(RecordHeader dnsHeader) : base(dnsHeader) { }

        public override void ParseRecord(ref MemoryStream ms)
        {
            _hostAddress = ms.ReadByte() + "." + ms.ReadByte() + "." + ms.ReadByte() + "." + ms.ReadByte();
            _answer = "Address: " + _hostAddress;
        }
    }
}