Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.ServiceModel.Discovery/System/ServiceModel/Channels/UdpConstants.cs

@@ -0,0 +1,33 @@
+//----------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//----------------------------------------------------------------
+
+namespace System.ServiceModel.Channels
+{
+    using System;
+
+    static class UdpConstants
+    {
+        // max is 64K - 20 (IP header) - 8(UDP header) - 1 (wraparound)
+        public const int MaxMessageSizeOverIPv4 = 64 * 1024 - 20 - 8 - 1;
+        public const int MaxTimeToLive = 255;
+        public const int MinReceiveBufferSize = 1;
+        public const int MinTimeToLive = 0; //localhost traffic only
+        public const int PendingReceiveCountPerProcessor = 2;
+        public const string Scheme = "soap.udp";
+
+        internal static class Defaults
+        {
+            public static readonly TimeSpan ReceiveTimeout = TimeSpan.FromMinutes(1);
+            public static readonly TimeSpan SendTimeout = TimeSpan.FromMinutes(1);
+            public const int DuplicateMessageHistoryLength = 0;
+            public const int InterfaceIndex = -1;
+            public const int MaxPendingMessageCount = 32;
+            public const long MaxReceivedMessageSize = SocketReceiveBufferSize;
+            public const int SocketReceiveBufferSize = 64 * 1024;
+            public const int TimeToLive = 1;
+            public static MessageEncoderFactory MessageEncoderFactory = new TextMessageEncodingBindingElement().CreateMessageEncoderFactory();
+        }
+
+    }
+}