add UnbindRequest

ldap.test/DeserializerTests.cs

@@ -170,6 +170,19 @@ public void CanReadSearchRequest2()
             Assert.False(control.Value.Value.IsEmpty);
         }
 
+        [Fact]
+        public void CanReadUnbindRequest()
+        {
+            var data = new byte[]
+            {
+                0x30, 0x84, 0x00, 0x00, 0x00, 0x05, 0x02, 0x01,
+                0x28, 0x42, 0x00
+            };
+            var message = Read(data);
+            Assert.Equal(40, message.Id);
+            Assert.IsType<LdapUnbindRequest>(message);
+        }
+
         private LdapRequestMessage Read(byte[] message)
         {
             return LdapReader.ReadMessage(message.AsMemory());

ldap/Asn1/Asn1ProtocolOpChoice.cs

@@ -40,7 +40,13 @@ internal struct Asn1ProtocolOpChoice
         [ExpectedTag(TagClass.Application, 1)]
         public Asn1BindResponse? BindResponse;
 
-        //public Asn1UnbindRequest? UnbindRequest;
+        /*
+         * UnbindRequest ::= [APPLICATION 2] NULL
+         */
+        [ExpectedTag(TagClass.Application, 2)]
+        [AnyValue]
+        //TODO
+        public ReadOnlyMemory<byte>? UnbindRequest;
 
         [ExpectedTag(TagClass.Application, 3)]
         public Asn1SearchRequest? SearchRequest;

ldap/LdapRequestMessage.cs

@@ -33,6 +33,10 @@ internal static LdapRequestMessage Create(Asn1LdapMessage message)
             {
                 return new LdapSearchRequest(message);
             }
+            else if (message.ProtocolOp.UnbindRequest != null)
+            {
+                return new LdapUnbindRequest(message);
+            }
             else
             {
                 throw new NotImplementedException();

ldap/LdapUnbindRequest.cs

@@ -0,0 +1,12 @@
+using zivillian.ldap.Asn1;
+
+namespace zivillian.ldap
+{
+    public class LdapUnbindRequest : LdapRequestMessage
+    {
+        internal LdapUnbindRequest(Asn1LdapMessage message)
+            : base(message)
+        {
+        }
+    }
+}