public void ClientServerSendReceive()
{
var logger = new TestLogger();
var serverBuffer = new ReceiveBuffer(maxPacketSize: 64, packetQueueCapacity: 4);
var server = new ServerUdpSocket(logger, serverBuffer);
server.Start(new IPEndPoint(IPAddress.Parse("127.0.0.1"), 27000));
var clientBuffer = new ReceiveBuffer(maxPacketSize: 64, packetQueueCapacity: 4);
var client = new ClientUdpSocket(logger, clientBuffer);
client.Start(new IPEndPoint(IPAddress.Parse("127.0.0.1"), 27000));
// Simulate TCP style SYN > SYN-ACK > ACK handshake...
// Client->Server SYN
client.Send(Encoding.ASCII.GetBytes("SYN"));
client.Send(Encoding.ASCII.GetBytes("SYN 2")); // Just to test multiple packets
WaitForReceive(serverBuffer, 2);
Assert.Equal(2, serverBuffer.Count);
byte[] data;
int offset;
int size;
IPEndPoint clientIpEndPoint;
serverBuffer.BeginRead(out data, out offset, out size);
serverBuffer.GetEndPoint(out clientIpEndPoint);
serverBuffer.EndRead();
var text0 = Encoding.ASCII.GetString(data, offset, size);
serverBuffer.BeginRead(out data, out offset, out size);
serverBuffer.EndRead();
var text1 = Encoding.ASCII.GetString(data, offset, size);
Assert.Equal(0, serverBuffer.Count);
Assert.True((text0 == "SYN" && text1 == "SYN 2") ||
(text0 == "SYN 2" && text1 == "SYN"));
// Server->Client SYN-ACK
server.SendTo(Encoding.ASCII.GetBytes("SYN-ACK"), clientIpEndPoint);
WaitForReceive(clientBuffer, 1);
clientBuffer.BeginRead(out data, out offset, out size);
clientBuffer.EndRead();
var syncAckText = Encoding.ASCII.GetString(data, offset, size);
Assert.Equal("SYN-ACK", syncAckText);
// Client->Server ACK
client.Send(Encoding.ASCII.GetBytes("ACK"));
WaitForReceive(serverBuffer, 1);
serverBuffer.BeginRead(out data, out offset, out size);
serverBuffer.EndRead();
var ackText = Encoding.ASCII.GetString(data, offset, size);
Assert.Equal("ACK", ackText);
}