public void EncodeDecodeDiscoveryResponse()
{
var response = new DiscoveryResponse("tcpex://some:123/SomeService", "1.0");
var encoded = DiscoveryMetadataHelper.Encode(response);
var decoded = DiscoveryMetadataHelper.Decode(encoded);
Assert.IsNotNull(decoded);
Assert.AreEqual(response, decoded);
}
public void EncodeDecodeDiscoveryRequest()
{
var request = new DiscoveryRequest("SomeService");
var encoded = DiscoveryMetadataHelper.Encode(request);
var decoded = DiscoveryMetadataHelper.Decode(encoded);
Assert.IsNotNull(decoded);
Assert.AreEqual(request, decoded);
}
public void DecodeSampleDiscoveryPacket()
{
var dp = new SamplePacket();
dp.Version = "EDC35F23-60AD-4730-A9AC-23D57B666DC1";
dp.ServiceUri = @"tcp://msdn.microsoft.com/en-us/library/tst0kwb1(v=vs.110).aspx|Something=Else|#5235@#$%\a\p\|@@";
dp.Properties["ExtraProperty"] = @"#%@$%45654!@#$\4214\|Shame=Value";
DiscoveryMetadataHelper.RegisterDiscoveryMetadataFactory(dp.Signature, () => new SamplePacket());
var packet = DiscoveryMetadataHelper.Encode(dp);
var decoded = DiscoveryMetadataHelper.Decode(packet);
Assert.IsNotNull(decoded);
Assert.AreEqual(decoded.GetType(), typeof(SamplePacket));
Assert.AreEqual(dp, decoded);
}
private void ReceiveCallback(IAsyncResult asyncResult)
{
var response = default(DiscoveryMetadata);
SafePerform(() =>
{
var udpClient = (UdpClient)asyncResult.AsyncState;
var remoteEndpoint = default(IPEndPoint);
var responseMetadata = udpClient.EndReceive(asyncResult, ref remoteEndpoint);
if (!Stopped)
{
response = DiscoveryMetadataHelper.Decode(responseMetadata);
}
});
if (response != null)
{
HandleResponse(response);
}
}
private void HandleRequest(UdpClient udpClient, IPEndPoint clientEndpoint, byte[] requestMetadata)
{
// check if request packet is damaged
var request = DiscoveryMetadataHelper.Decode(requestMetadata);
if (request == null)
{
return;
}
// make sure discovery metadata matches the request
if (!ResponseMetadata.Matches(request) || Stopped)
{
return;
}
// send a response
SafePerform(() =>
{
udpClient.BeginSend(ResponseMetadataPacket, ResponseMetadataPacket.Length, clientEndpoint, SendCallback, udpClient);
});
}