public async Task Listen()
{
var udp = new Udp();
var cs = new CancellationTokenSource(TimeSpan.FromSeconds(30));
var connected = false;
MultiAddress listenerAddress = null;
Action <Stream, MultiAddress, MultiAddress> handler = (stream, local, remote) =>
{
Assert.IsNotNull(stream);
connected = true;
};
try
{
listenerAddress = udp.Listen("/ip4/127.0.0.1", handler, cs.Token);
Assert.IsTrue(listenerAddress.Protocols.Any(p => p.Name == "udp"));
using (var stream = await udp.ConnectAsync(listenerAddress, cs.Token))
{
await Task.Delay(50);
Assert.IsNotNull(stream);
Assert.IsTrue(connected);
}
}
finally
{
cs.Cancel();
}
}
public async Task NetworkTimeProtocol()
{
var cs = new CancellationTokenSource(TimeSpan.FromSeconds(30));
var server = await new MultiAddress("/dns4/time.windows.com/udp/123").ResolveAsync(cs.Token);
var ntpData = new byte[48];
ntpData[0] = 0x1B;
var udp = new Udp();
using (var time = await udp.ConnectAsync(server[0], cs.Token))
{
ntpData[0] = 0x1B;
await time.WriteAsync(ntpData, 0, ntpData.Length, cs.Token);
await time.FlushAsync(cs.Token);
await time.ReadAsync(ntpData, 0, ntpData.Length, cs.Token);
Assert.AreNotEqual(0x1B, ntpData[0]);
Array.Clear(ntpData, 0, ntpData.Length);
ntpData[0] = 0x1B;
await time.WriteAsync(ntpData, 0, ntpData.Length, cs.Token);
await time.FlushAsync(cs.Token);
await time.ReadAsync(ntpData, 0, ntpData.Length, cs.Token);
Assert.AreNotEqual(0x1B, ntpData[0]);
}
}
public void Connect_Missing_IP_Address()
{
var udp = new Udp();
ExceptionAssert.Throws <Exception>(() =>
{
var _ = udp.ConnectAsync("/udp/32700").Result;
});
}
public void Connect_Cancelled()
{
var udp = new Udp();
var cs = new CancellationTokenSource();
cs.Cancel();
ExceptionAssert.Throws <OperationCanceledException>(() =>
{
var stream = udp.ConnectAsync("/ip4/127.0.10.10/udp/32700", cs.Token).Result;
});
}
public void Connect_Missing_UDP_Port()
{
var udp = new Udp();
ExceptionAssert.Throws <Exception>(() =>
{
var _ = udp.ConnectAsync("/ip4/127.0.0.1/tcp/32700").Result;
});
ExceptionAssert.Throws <Exception>(() =>
{
var _ = udp.ConnectAsync("/ip4/127.0.0.1").Result;
});
}
public async Task SendReceive()
{
var cs = new CancellationTokenSource(TimeSpan.FromSeconds(30));
var udp = new Udp();
using (var server = new HelloServer())
using (var stream = await udp.ConnectAsync(server.Address, cs.Token))
{
var bytes = new byte[5];
await stream.ReadAsync(bytes, 0, bytes.Length, cs.Token);
Assert.AreEqual("hello", Encoding.UTF8.GetString(bytes));
}
}
public HelloServer()
{
var udp = new Udp();
Address = udp.Listen("/ip4/127.0.0.1", Handler, cs.Token);
}