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DNS.NET Resolver (C#)

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11 Mar 2013CPOL6 min read 645.8K   18.6K   280  
A full implementation of a reusable DNS resolver component and a Dig.Net example application.
using System;

#region Rfc info
/*
 * http://www.ietf.org/rfc/rfc2535.txt
 * 4.1 SIG RDATA Format

   The RDATA portion of a SIG RR is as shown below.  The integrity of
   the RDATA information is protected by the signature field.

                           1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |        type covered           |  algorithm    |     labels    |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                         original TTL                          |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                      signature expiration                     |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                      signature inception                      |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |            key  tag           |                               |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+         signer's name         +
      |                                                               /
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-/
      /                                                               /
      /                            signature                          /
      /                                                               /
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


*/
#endregion

namespace Heijden.DNS
{
	public class RecordSIG : Record
	{
		public UInt16 TYPECOVERED;
		public byte ALGORITHM;
		public byte LABELS;
		public UInt32 ORIGINALTTL;
		public UInt32 SIGNATUREEXPIRATION;
		public UInt32 SIGNATUREINCEPTION;
		public UInt16 KEYTAG;
		public string SIGNERSNAME;
		public string SIGNATURE;

		public RecordSIG(RecordReader rr)
		{
			TYPECOVERED = rr.ReadUInt16();
			ALGORITHM = rr.ReadByte();
			LABELS = rr.ReadByte();
			ORIGINALTTL = rr.ReadUInt32();
			SIGNATUREEXPIRATION = rr.ReadUInt32();
			SIGNATUREINCEPTION = rr.ReadUInt32();
			KEYTAG = rr.ReadUInt16();
			SIGNERSNAME = rr.ReadDomainName();
			SIGNATURE = rr.ReadString();
		}

		public override string ToString()
		{
			return string.Format("{0} {1} {2} {3} {4} {5} {6} {7} \"{8}\"",
				TYPECOVERED,
				ALGORITHM,
				LABELS,
				ORIGINALTTL,
				SIGNATUREEXPIRATION,
				SIGNATUREINCEPTION,
				KEYTAG,
				SIGNERSNAME,
				SIGNATURE);
		}

	}
}

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Retired Van der Heijden Holding BV
Netherlands Netherlands
I'm Alphons van der Heijden, living in Lelystad, Netherlands, Europa, Earth. And currently I'm retiring from hard working ( ;- ), owning my own company. Because I'm full of energy, and a little to young to relax ...., I don't sit down, but create and recreate software solutions, that I like. Reinventing the wheel is my second nature. My interest is in the area of Internet technologies, .NET etc. I was there in 1992 when Mosaic came out, and from that point, my life changed dramatically, and so did the world, in fact. (Y)

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