/// <summary>
/// Formats and writes this header to the specified query writer.
/// </summary>
/// <param name="writer">The writer.</param>
/// <exception cref="System.ArgumentNullException">
/// Thrown when <paramref name="writer"/> is <see langword="null"/>.
/// </exception>
public virtual void Write(IDnsWriter writer)
{
Guard.NotNull(writer, "writer");
writer.WriteUInt16((ushort)this.Id);
byte b3 = 0;
if (!this.IsQuery)
{
b3 |= 0x80;
}
b3 |= (byte)(((byte)this.OpCode & 0x0F) << 3);
if (this.IsAuthorative)
{
b3 |= 0x04;
}
if (this.IsTruncated)
{
b3 |= 0x02;
}
if (this.IsRecursionDesired)
{
b3 |= 0x01;
}
writer.WriteByte(b3);
byte b4 = (byte)this.ResponseCode;
if (this.IsRecursionAllowed)
{
b4 |= 0x80;
}
writer.WriteByte(b4);
writer.WriteUInt16(this.QuestionCount);
writer.WriteUInt16(this.AnswerCount);
writer.WriteUInt16(this.AuthorityCount);
writer.WriteUInt16(this.AdditionalCount);
}
/// <summary>
/// Writes the RDATA of this resource record to the specified
/// <see cref="AK.Net.Dns.IDnsWriter"/>.
/// </summary>
/// <param name="writer">The writer.</param>
/// <exception cref="System.ArgumentNullException">
/// Thrown when <paramref name="writer"/> is <see langword="null"/>.
/// </exception>
public override void WriteData(IDnsWriter writer)
{
Guard.NotNull(writer, "writer");
const int BITS_IN_BYTE = 8;
byte[] buf;
writer.WriteIPAddress(this.Address);
writer.WriteByte(this.Protocol);
if (this.Bitmap.Count % BITS_IN_BYTE != 0)
{
this.Bitmap.Length = this.Bitmap.Count + (this.Bitmap.Count % BITS_IN_BYTE);
}
buf = new byte[this.Bitmap.Length / BITS_IN_BYTE];
this.Bitmap.CopyTo(buf, 0);
writer.WriteBytes(buf);
}