done

Netch/3rd/DnsClient.NET/Protocol/NullRecord.cs

@@ -0,0 +1,63 @@
+using System;
+using System.Text;
+
+namespace DnsClient.Protocol
+{
+    /*
+    https://tools.ietf.org/html/rfc1035#section-3.3.10:
+    3.3.10. NULL RDATA format (EXPERIMENTAL)
+
+        +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
+        /                  <anything>                   /
+        /                                               /
+        +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
+
+    Anything at all may be in the RDATA field so long as it is 65535 octets
+    or less.
+     */
+
+    /// <summary>
+    /// Experimental RR, not sure if the implementation is actually correct either (not tested).
+    /// </summary>
+    /// <seealso href="https://tools.ietf.org/html/rfc1035#section-3.3.10">RFC 1035</seealso>
+    public class NullRecord : DnsResourceRecord
+    {
+        /// <summary>
+        /// Gets any data stored in this record.
+        /// </summary>
+        /// <value>
+        /// The byte array.
+        /// </value>
+        public byte[] Anything { get; }
+
+        /// <summary>
+        /// Gets the raw data of this record as UTF8 string.
+        /// </summary>
+        public string AsString { get; }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="NullRecord" /> class.
+        /// </summary>
+        /// <param name="info">The information.</param>
+        /// <param name="anything">Anything.</param>
+        /// <exception cref="System.ArgumentNullException">If <paramref name="info"/> or <paramref name="anything"/> is null.</exception>
+        public NullRecord(ResourceRecordInfo info, byte[] anything)
+            : base(info)
+        {
+            Anything = anything ?? throw new ArgumentNullException(nameof(anything));
+            try
+            {
+                AsString = Encoding.UTF8.GetString(anything);
+            }
+            catch
+            {
+                // ignore errors.
+            }
+        }
+
+        private protected override string RecordToString()
+        {
+            return $"\\# {Anything.Length} {AsString}";
+        }
+    }
+}