/// <summary>
/// Delegate for asynchronously receiving UDP packets
/// </summary>
private void onDataRecieved(IAsyncResult asyn)
{ //Use the logger
using (LogAssume.Assume(_logger))
{
PacketBase packet = null;
int read = 0;
try
{ //Sanity checks
if (!asyn.IsCompleted)
{ //Abort
Log.write(TLog.Warning, "Asynchronous socket operation not completed.");
return;
}
//Receive the data
read = _sock.EndReceiveFrom(asyn, ref _remEP);
//Read in the typeID
ushort typeID = NetworkClient.getTypeID(_buffer, 0);
//Handle the initial packet specially
bool bNewClient = false;
//Initial && system packet?
if (_buffer[0] == 0 && typeID == Protocol.CS_Initial.TypeID)
{ //If we're receiving the initial packet, then the client will
//want to begin a new connection state. Destroy the old one!
//Protocol.CS_Initial init = packet as Protocol.CS_Initial;
bNewClient = true;
}
//Attempt to find the related NetworkClient
_networkLock.AcquireWriterLock(Timeout.Infinite);
NetworkClient client = null;
try
{ //Form the uid for the client
IPEndPoint ipe = (IPEndPoint)_remEP;
Int64 id = ipe.Address.Address | (((Int64)ipe.Port) << 32);
//Do we have a client?
if (bNewClient)
{ //This client doesn't exist yet, let's create a new class
client = _clientTemplate.newInstance();
client._lastPacketRecv = Environment.TickCount;
client._ipe = ipe;
client._handler = this;
//Add it to our client list
_clients[id] = client;
}
else
{
_clients.TryGetValue(id, out client);
}
//Out of sync packet?
if (client == null)
{
Log.write(TLog.Inane, "Out of state packet received from {0}", _remEP);
}
//If the client is inactive, ignore
else if (client._bDestroyed)
{
client = null;
}
}
finally
{ //Release our lock
_networkLock.ReleaseWriterLock();
}
if (client != null)
{ //Make sure the packet is intact
int offset = 0;
if (!client.checkPacket(_buffer, ref offset, ref read))
{
//Bad packet!
Log.write(TLog.Warning, "Bad packet received from {0}", client);
}
else
{ //Transplant the data into a packet class
packet = _factory.createPacket(client, typeID, _buffer, offset, read);
packet._client = client;
packet._handler = this;
packet.Deserialize();
//Queue it up
handlePacket(packet, client);
client._lastPacketRecv = Environment.TickCount;
}
}
}
catch (ObjectDisposedException)
{ //Socket was closed
Log.write(TLog.Inane, "Socket closed.");
_bOperating = false;
return;
}
catch (SocketException se)
{ //Store the exception and exit
Log.write(TLog.Exception, "Socket exception[{0}]:\r\n{1}", se.ErrorCode, se.ToString());
}
catch (Exception ex)
{ //Store the exception and exit
Log.write(TLog.Exception, "Exception on recieving data:\r\n{0}", ex.ToString());
if (packet != null)
{
Log.write(TLog.Inane, "Packet data:\r\n{0}", packet.DataDump);
}
else
{
Log.write(TLog.Inane, "Packet data:\r\n{0}", PacketBase.createDataDump(_buffer, 0, read));
}
}
try
{ //Wait for more data
_sock.BeginReceiveFrom(_buffer, 0, _buffer.Length, SocketFlags.None, ref _remEP, onDataRecieved, null);
}
catch (SocketException se)
{ //Store the exception and exit
Log.write(TLog.Exception, "Socket exception[{0}]:\r\n{1}", se.ErrorCode, se.ToString());
}
}
}
/// <summary>
/// Allows handling of packets before they're dispatched
/// </summary>
public virtual bool predispatchCheck(PacketBase packet)
{
return(true);
}