done

2026-03-30 19:09:48 +08:00 · 2019-12-02 19:51:12 +08:00
commit b2ea730984
229 changed files with 86605 additions and 0 deletions
--- a/Netch/3rd/DnsClient.NET/DnsRequestHeader.cs
+++ b/Netch/3rd/DnsClient.NET/DnsRequestHeader.cs
@@ -0,0 +1,97 @@
+using DnsClient.Protocol;
+
+namespace DnsClient
+{
+    internal class DnsRequestHeader
+    {
+        public const int HeaderLength = 12;
+
+        private ushort _flags = 0;
+
+        public ushort RawFlags => _flags;
+
+        internal DnsHeaderFlag HeaderFlags
+        {
+            get
+            {
+                return (DnsHeaderFlag)_flags;
+            }
+            set
+            {
+                _flags &= (ushort)~(DnsHeaderFlag.IsCheckingDisabled);
+                _flags &= (ushort)~(DnsHeaderFlag.IsAuthenticData);
+                _flags &= (ushort)~(DnsHeaderFlag.FutureUse);
+                _flags &= (ushort)~(DnsHeaderFlag.HasQuery);
+                _flags &= (ushort)~(DnsHeaderFlag.HasAuthorityAnswer);
+                _flags &= (ushort)~(DnsHeaderFlag.ResultTruncated);
+                _flags &= (ushort)~(DnsHeaderFlag.RecursionDesired);
+                _flags &= (ushort)~(DnsHeaderFlag.RecursionAvailable);
+                _flags |= (ushort)value;
+            }
+        }
+
+        public int Id { get; set; }
+
+        public DnsOpCode OpCode
+        {
+            get
+            {
+                return (DnsOpCode)((DnsHeader.OPCodeMask & _flags) >> DnsHeader.OPCodeShift);
+            }
+            set
+            {
+                _flags &= (ushort)~(DnsHeader.OPCodeMask);
+                _flags |= (ushort)(((ushort)value << DnsHeader.OPCodeShift) & DnsHeader.OPCodeMask);
+            }
+        }
+
+        public ushort RCode
+        {
+            get
+            {
+                return (ushort)(DnsHeader.RCodeMask & _flags);
+            }
+            set
+            {
+                _flags &= (ushort)~(DnsHeader.RCodeMask);
+                _flags |= (ushort)(value & DnsHeader.RCodeMask);
+            }
+        }
+
+        public bool UseRecursion
+        {
+            get
+            {
+                return HeaderFlags.HasFlag(DnsHeaderFlag.RecursionDesired);
+            }
+            set
+            {
+                if (value)
+                {
+                    _flags |= (ushort)DnsHeaderFlag.RecursionDesired;
+                }
+                else
+                {
+                    _flags &= (ushort)~(DnsHeaderFlag.RecursionDesired);
+                }
+            }
+        }
+
+        public DnsRequestHeader(int id, DnsOpCode queryKind)
+            : this(id, true, queryKind)
+        {
+        }
+
+        public DnsRequestHeader(int id, bool useRecursion, DnsOpCode queryKind)
+        {
+            Id = id;
+            OpCode = queryKind;
+            UseRecursion = useRecursion;
+        }
+
+        public override string ToString()
+        {
+            return $"{Id} - Qs: {1} Recursion: {UseRecursion} OpCode: {OpCode}";
+        }
+    }
+}