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DNS.NET Resolver (C#)

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11 Mar 2013CPOL6 min read 661.3K   18.6K   280  
A full implementation of a reusable DNS resolver component and a Dig.Net example application.
using System;
/* http://tools.ietf.org/rfc/rfc1183.txt

 * 1. AFS Data Base location

   This section defines an extension of the DNS to locate servers both
   for AFS (AFS is a registered trademark of Transarc Corporation) and
   for the Open Software Foundation's (OSF) Distributed Computing
   Environment (DCE) authenticated naming system using HP/Apollo's NCA,
   both to be components of the OSF DCE.  The discussion assumes that
   the reader is familiar with AFS [5] and NCA [6].

   The AFS (originally the Andrew File System) system uses the DNS to
   map from a domain name to the name of an AFS cell database server.
   The DCE Naming service uses the DNS for a similar function: mapping
   from the domain name of a cell to authenticated name servers for that
   cell.  The method uses a new RR type with mnemonic AFSDB and type
   code of 18 (decimal).

   AFSDB has the following format:

   <owner> <ttl> <class> AFSDB <subtype> <hostname>

   Both RDATA fields are required in all AFSDB RRs.  The <subtype> field
   is a 16 bit integer.  The <hostname> field is a domain name of a host
   that has a server for the cell named by the owner name of the RR.

 */

namespace Heijden.DNS
{
	public class RecordAFSDB : Record
	{
		public ushort SUBTYPE;
		public string HOSTNAME;

		public RecordAFSDB(RecordReader rr)
		{
			SUBTYPE = rr.ReadUInt16();
			//HOSTNAME = rr.ReadString();
			HOSTNAME = rr.ReadDomainName();
		}

		public override string ToString()
		{
			return string.Format("{0} {1}",
				SUBTYPE,
				HOSTNAME);
		}

	}
}

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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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