mcs/class/test-helpers/NetworkHelpers.cs

   1 using System;
   2 using System.Net;
   3 using System.Net.Sockets;
   4
   5 namespace MonoTests.Helpers {
   6
   7         public static class NetworkHelpers
   8         {
   9                 static Random rndPort = new Random ();
  10
  11                 public static int FindFreePort ()
  12                 {
  13                         return LocalEphemeralEndPoint ().Port;
  14                 }
  15
  16                 public static IPEndPoint LocalEphemeralEndPoint ()
  17                 {
  18                         while (true) {
  19                                 var ep = new IPEndPoint (IPAddress.Loopback, rndPort.Next (10000, 60000));
  20
  21                                 try {
  22                                         using (var socket = new Socket (ep.AddressFamily, SocketType.Stream, ProtocolType.Tcp)) {
  23                                                 socket.Bind (ep);
  24                                                 socket.Close ();
  25                                         }
  26                                         return ep;
  27                                 } catch (SocketException) { }
  28                         }
  29                 }
  30         }
  31 }