public static byte[] Serialize(ref IMessage Message)
{
var Size = SizeOf(ref Message);
var Stream = new DnStream(Size);
var Pointers = new Dictionary <string, ushort>();
Stream.SetUShort(Message.ID);
Stream.SetBit((byte)Message.MessageType);
Stream.SetBits(4, (byte)Message.OperationCode);
Stream.SetBit((byte)Message.AuthoritativeAnswer);
Stream.SetBit(Convert.ToByte(Message.Truncated));
Stream.SetBit(Convert.ToByte(Message.RecursionDesired));
Stream.SetBit(Convert.ToByte(Message.RecursionAvailable));
Stream.SetBit(Message.Zero);
Stream.SetBit(Convert.ToByte(Message.AuthenticatedData));
Stream.SetBit(Convert.ToByte(Message.CheckingDisabled));
Stream.SetBits(4, (byte)Message.ResponseCode);
Stream.SetUShort((ushort)Message.Questions.Count());
Stream.SetUShort((ushort)Message.Answers.Count());
Stream.SetUShort((ushort)Message.Authority.Count());
Stream.SetUShort((ushort)Message.Additional.Count());
Set(ref Stream, ref Pointers, Message.Questions);
Set(ref Stream, ref Pointers, Message.Answers);
Set(ref Stream, ref Pointers, Message.Authority);
Set(ref Stream, ref Pointers, Message.Additional);
return(Stream.ToArray());
}
private static void Set(ref DnStream Stream, ref Dictionary <string, ushort> Pointers, IEnumerable <string> Labels)
{
var Domain = string.Join('.', Labels);
foreach (var Label in Labels)
{
var SubDomain = Domain.Substring(Domain.IndexOf(Label));
if (Pointers.ContainsKey(SubDomain))
{
Stream.SetBits(2, (byte)LabelType.Compressed);
var Bytes = new byte[2];
BinaryPrimitives.WriteUInt16BigEndian(Bytes, Pointers[SubDomain]);
Stream.SetBits(6, Bytes[0]);
Stream.SetByte(Bytes[1]);
return;
}
else
{
Pointers.Add(SubDomain, Stream.BytePosition);
Stream.SetBits(2, (byte)LabelType.Normal);
Stream.SetBits(6, (byte)Label.Length);
Stream.SetString(Label);
}
}
Stream.SetByte(0);
}