Question

I have such socket:

s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);

Am I correct then when I call

s.Receive(byte[]);

I receive exactly one datagram? I need to process datagrams one by one.

Answer 1

It will return at most one UDP packet. (If one consider that an Exception results in “not returning anything”.)

The Socket.Recieve documentation states (in the remarks section):

If you are using a connectionless Socket, Receive will read the first queued datagram from the destination address you specify in the Connect method.

However, note the following sentence:

If the datagram you receive is larger than the size of the buffer parameter, buffer gets filled with the first part of the message, the excess data is lost and a SocketException is thrown.

The call may also throw an Exception on a timeout or when there is no data available in non-blocking mode, etc.

Happy coding.