public async Task Run_Log(bool modify, bool drop)
{
var outbound = (bool?)null;
if (modify)
{
outbound = true;
}
var logger = new StringWriter();
using var udp1 = new UdpClient(new IPEndPoint(IPAddress.Loopback, port1));
udp1.Connect(IPAddress.Loopback, port2);
using var udp2 = new UdpClient(new IPEndPoint(IPAddress.Loopback, port2));
udp2.Connect(IPAddress.Loopback, port1);
var nat = new WinDivertNAT.WinDivertNAT($"udp.SrcPort == {port1} and udp.DstPort == {port2} and loopback")
{
Outbound = outbound,
Drop = drop,
Logger = logger,
};
using var cancel = new CancellationTokenSource();
using var task = Task.Run(() => nat.Run(cancel.Token));
await Task.Delay(250);
_ = udp1.Send(new byte[1], 1);
await Task.Delay(250);
cancel.Cancel();
_ = await Assert.ThrowsExceptionAsync <OperationCanceledException>(() => task);
Assert.IsTrue(logger.GetStringBuilder().Length > 0);
}
public async Task Run_Drop(bool modify, bool log)
{
var outbound = (bool?)null;
if (modify)
{
outbound = true;
}
var logger = (TextWriter?)null;
if (log)
{
logger = new StringWriter();
}
using var udp1 = new UdpClient(new IPEndPoint(IPAddress.Loopback, port1));
udp1.Connect(IPAddress.Loopback, port2);
using var udp2 = new UdpClient(new IPEndPoint(IPAddress.Loopback, port2));
udp2.Connect(IPAddress.Loopback, port1);
udp2.Client.ReceiveTimeout = 250;
var nat = new WinDivertNAT.WinDivertNAT($"udp.SrcPort == {port1} and udp.DstPort == {port2} and loopback")
{
Outbound = outbound,
Drop = true,
Logger = logger,
};
using var cancel = new CancellationTokenSource();
using var task = Task.Run(() => nat.Run(cancel.Token));
await Task.Delay(250);
var remoteEP = new IPEndPoint(IPAddress.Any, 0);
_ = udp1.Send(new byte[1], 1);
var e = Assert.ThrowsException <SocketException>(() => udp2.Receive(ref remoteEP));
Assert.AreEqual(SocketError.TimedOut, e.SocketErrorCode);
cancel.Cancel();
_ = await Assert.ThrowsExceptionAsync <OperationCanceledException>(() => task);
}