Add support for udp exclusiveAddressUse. (kerryjiang#726)

Author: wj8400684

src/SuperSocket.Server.Abstractions/ListenOptions.cs

@@ -21,7 +21,9 @@ public class ListenOptions
         public CertificateOptions CertificateOptions { get; set; }
 
         public TimeSpan ConnectionAcceptTimeOut { get; set; } = TimeSpan.FromSeconds(5);
-                
+
+        public bool UdpExclusiveAddressUse { get; set; } = true;
+
         public IPEndPoint ToEndPoint()
         {
             var ip = this.Ip;

src/SuperSocket.Udp/UdpConnectionListener.cs

@@ -61,7 +61,8 @@ public bool Start()
 
                 if (options.NoDelay)
                     listenSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.NoDelay, true);
-                
+
+                listenSocket.ExclusiveAddressUse = options.UdpExclusiveAddressUse;
                 listenSocket.Bind(listenEndpoint);
 
                 _acceptRemoteEndPoint = listenEndpoint.AddressFamily == AddressFamily.InterNetworkV6 ? new IPEndPoint(IPAddress.IPv6Any, 0) : new IPEndPoint(IPAddress.Any, 0);