System.Net.Sockets.Tests.DualModeConnectionlessReceiveMessageFrom.BeginReceiveMessageFrom_Helper C# (CSharp) Метод

        private void BeginReceiveMessageFrom_Helper(IPAddress listenOn, IPAddress connectTo, bool expectedToTimeout = false)
        {
            using (Socket serverSocket = new Socket(SocketType.Dgram, ProtocolType.Udp))
            {
                int port = serverSocket.BindToAnonymousPort(listenOn);

                EndPoint receivedFrom = new IPEndPoint(connectTo, port);
                SocketFlags socketFlags = SocketFlags.None;
                IPPacketInformation ipPacketInformation;
                IAsyncResult async = serverSocket.BeginReceiveMessageFrom(new byte[1], 0, 1, socketFlags, ref receivedFrom, null, null);

                // Behavior difference from Desktop: receivedFrom will _not_ change during the synchronous phase.

                // IPEndPoint remoteEndPoint = receivedFrom as IPEndPoint;
                // Assert.Equal(AddressFamily.InterNetworkV6, remoteEndPoint.AddressFamily);
                // Assert.Equal(connectTo.MapToIPv6(), remoteEndPoint.Address);

                SocketUdpClient client = new SocketUdpClient(_log, serverSocket, connectTo, port, redundant: !expectedToTimeout);
                bool success = async.AsyncWaitHandle.WaitOne(expectedToTimeout ? TestSettings.FailingTestTimeout : TestSettings.PassingTestTimeout);
                if (!success)
                {
                    throw new TimeoutException();
                }

                receivedFrom = new IPEndPoint(connectTo, port);
                int received = serverSocket.EndReceiveMessageFrom(async, ref socketFlags, ref receivedFrom, out ipPacketInformation);

                Assert.Equal(1, received);
                Assert.Equal<Type>(receivedFrom.GetType(), typeof(IPEndPoint));

                IPEndPoint remoteEndPoint = receivedFrom as IPEndPoint;
                Assert.Equal(AddressFamily.InterNetworkV6, remoteEndPoint.AddressFamily);
                Assert.Equal(connectTo.MapToIPv6(), remoteEndPoint.Address);

                Assert.Equal(SocketFlags.None, socketFlags);
                Assert.NotNull(ipPacketInformation);
                Assert.Equal(connectTo, ipPacketInformation.Address);
            }
        }