Revert changes in UDPRelay.cs

UDP SendTo doesn't support DnsEndPoint.

Signed-off-by: noisyfox <timemanager.rick@gmail.com>

shadowsocks-csharp/Controller/Service/Listener.cs

@@ -116,8 +116,9 @@ namespace Shadowsocks.Controller
             catch (ObjectDisposedException)
             {
             }
-            catch (Exception)
+            catch (Exception ex)
             {
+                Logging.LogUsefulException(ex);
             }
             finally
             {

shadowsocks-csharp/Controller/Service/UDPRelay.cs

@@ -7,7 +7,6 @@ using System.Runtime.CompilerServices;
 using Shadowsocks.Controller.Strategy;
 using Shadowsocks.Encryption;
 using Shadowsocks.Model;
-using Shadowsocks.Util;
 
 namespace Shadowsocks.Controller
 {
@@ -57,7 +56,7 @@ namespace Shadowsocks.Controller
             private byte[] _buffer = new byte[1500];
 
             private IPEndPoint _localEndPoint;
-            private EndPoint _remoteEndPoint;
+            private IPEndPoint _remoteEndPoint;
 
             public UDPHandler(Socket local, Server server, IPEndPoint localEndPoint)
             {
@@ -65,8 +64,16 @@ namespace Shadowsocks.Controller
                 _server = server;
                 _localEndPoint = localEndPoint;
 
-                _remoteEndPoint = SocketUtil.GetEndPoint(server.server, server.server_port);
-                _remote = SocketUtil.CreateSocket(_remoteEndPoint, ProtocolType.Udp);
+                // TODO async resolving
+                IPAddress ipAddress;
+                bool parsed = IPAddress.TryParse(server.server, out ipAddress);
+                if (!parsed)
+                {
+                    IPHostEntry ipHostInfo = Dns.GetHostEntry(server.server);
+                    ipAddress = ipHostInfo.AddressList[0];
+                }
+                _remoteEndPoint = new IPEndPoint(ipAddress, server.server_port);
+                _remote = new Socket(_remoteEndPoint.AddressFamily, SocketType.Dgram, ProtocolType.Udp);
             }
 
             public void Send(byte[] data, int length)