Replace DnDns with HeijdenDns

HeijdenDns seems to do a better job at querying SRV records

MinecraftClient/Protocol/Dns/Question.cs

@@ -0,0 +1,129 @@
+using System;
+using System.IO;
+using System.Collections.Generic;
+using System.Net;
+using System.Text;
+
+namespace Heijden.DNS
+{
+	#region Rfc 1034/1035
+	/*
+	4.1.2. Question section format
+
+	The question section is used to carry the "question" in most queries,
+	i.e., the parameters that define what is being asked.  The section
+	contains QDCOUNT (usually 1) entries, each of the following format:
+
+										1  1  1  1  1  1
+		  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5
+		+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
+		|                                               |
+		/                     QNAME                     /
+		/                                               /
+		+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
+		|                     QTYPE                     |
+		+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
+		|                     QCLASS                    |
+		+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
+
+	where:
+
+	QNAME           a domain name represented as a sequence of labels, where
+					each label consists of a length octet followed by that
+					number of octets.  The domain name terminates with the
+					zero length octet for the null label of the root.  Note
+					that this field may be an odd number of octets; no
+					padding is used.
+
+	QTYPE           a two octet code which specifies the type of the query.
+					The values for this field include all codes valid for a
+					TYPE field, together with some more general codes which
+					can match more than one type of RR.
+
+
+	QCLASS          a two octet code that specifies the class of the query.
+					For example, the QCLASS field is IN for the Internet.
+	*/
+	#endregion
+
+	public class Question
+	{
+		private string m_QName;
+		public string QName
+		{
+			get
+			{
+				return m_QName;
+			}
+			set
+			{
+				m_QName = value;
+				if (!m_QName.EndsWith("."))
+					m_QName += ".";
+			}
+		}
+		public QType QType;
+		public QClass QClass;
+
+		public Question(string QName,QType QType,QClass QClass)
+		{
+			this.QName = QName;
+			this.QType = QType;
+			this.QClass = QClass;
+		}
+
+		public Question(RecordReader rr)
+		{
+			QName = rr.ReadDomainName();
+			QType = (QType)rr.ReadUInt16();
+			QClass = (QClass)rr.ReadUInt16();
+		}
+
+		private byte[] WriteName(string src)
+		{
+			if (!src.EndsWith("."))
+				src += ".";
+
+			if (src == ".")
+				return new byte[1];
+
+			StringBuilder sb = new StringBuilder();
+			int intI, intJ, intLen = src.Length;
+			sb.Append('\0');
+			for (intI = 0, intJ = 0; intI < intLen; intI++, intJ++)
+			{
+				sb.Append(src[intI]);
+				if (src[intI] == '.')
+				{
+					sb[intI - intJ] = (char)(intJ & 0xff);
+					intJ = -1;
+				}
+			}
+			sb[sb.Length - 1] = '\0';
+			return System.Text.Encoding.ASCII.GetBytes(sb.ToString());
+		}
+
+		public byte[] Data
+		{
+			get
+			{
+				List<byte> data = new List<byte>();
+				data.AddRange(WriteName(QName));
+				data.AddRange(WriteShort((ushort)QType));
+				data.AddRange(WriteShort((ushort)QClass));
+				return data.ToArray();
+			}
+		}
+
+		private byte[] WriteShort(ushort sValue)
+		{
+			return BitConverter.GetBytes(IPAddress.HostToNetworkOrder((short)sValue));
+		}
+
+
+		public override string ToString()
+		{
+			return string.Format("{0,-32}\t{1}\t{2}", QName, QClass, QType);
+		}
+	}
+}