/// <summary> Processes incoming UDP packet, then starts the listener again. </summary>
private static void HandleUDPData(IAsyncResult Result)
{
UdpClient Listener;
IPEndPoint ReceivedEndpoint;
byte[] Data;
string ClientName;
try
{
Listener = (UdpClient)Result.AsyncState;
ReceivedEndpoint = new IPEndPoint(IPAddress.Any, 0);
Data = Listener.EndReceive(Result, ref ReceivedEndpoint);
ClientName = FindClient(ReceivedEndpoint, true);
}
catch (Exception Exc)
{
Log.Output(Log.Severity.WARNING, Log.Source.NETWORK, "Failed to receive UDP data.");
Log.Exception(Log.Source.NETWORK, Exc);
return;
}
if (Data.Length == 0) // TODO: Can this happen?
{
Log.Output(Log.Severity.INFO, Log.Source.NETWORK, "Client has disconnected.");
if (ClientName != null)
{
lock (Clients[ClientName]) { Clients[ClientName].Connected = false; }
}
}
else
{
if (ClientName == null) // New client
{
try { ClientName = UtilData.ToString(Data); } catch { }
if (ClientName != null && ClientName.Length > 0)
{
Log.Output(Log.Severity.INFO, Log.Source.NETWORK, "UDP Client connected with name \"" + ClientName + "\".");
lock (Clients)
{
if (Clients.ContainsKey(ClientName))
{
Clients[ClientName].EndpointUDP = ReceivedEndpoint;
Clients[ClientName].Connected = true;
}
else
{
ScarletClient NewClient = new ScarletClient()
{
EndpointUDP = ReceivedEndpoint,
Name = ClientName,
Connected = true
};
Clients.Add(ClientName, NewClient);
}
}
// Create buffer for the client
CreateBufferIfClientIsNew(ClientName);
}
else
{
Log.Output(Log.Severity.WARNING, Log.Source.NETWORK, "UDP Client sent invalid name upon connecting.");
}
}
else // Existing client
{
Packet ReceivedPack = new Packet(new Message(Data), false, ClientName);
ReceiveQueue.Enqueue(ReceivedPack);
if (StorePackets)
{
PacketsReceived.Add(ReceivedPack);
}
}
}
Listener.BeginReceive(HandleUDPData, Listener);
}
/// <summary>
/// Begin receiving data on the Loopback ip with a specified port.
/// </summary>
/// <param name="port">The port to listen for data on.</param>
void BeginReceive(int port)
{
IpEndpoint = new IPEndPoint(IPAddress.Loopback, port);
Listener.BeginReceive((ReceiveCallback), Listener);
}
