UdpClient, Receive () immediately after sending () does not work?

Question

Consider the following code:

client.Send(data, data.Length, endpoint);
byte[] response = client.Receive(ref endpoint);

So far, according to WireShark (network sniffer), the remote host is responding with data, the application here is just waiting for data forever ... for some reason, it does not receive a response from the remote host.

Any ideas?

Answer 1

You probably need to configure two UdpClients: one for listening, one for sending.

For the receiving UdpClient, use a constructor that accepts the port.

Answer 2

perhaps the remote host has a firewall and then could not respond to the request before sending the request, set

client.Client.ReceiveTimeout = 5000; 

therefore, when the response could not receive the request, you have an exception