void m_Connection_ReceiveData(object sender, ConnectionReceiveDataEventArgs e)
{
//Log.WriteLog(Log.LogLevelType.Comm, "CommandInterface::ReceiveData(): " +
// "[" + m_Connection.Address + ":" + m_Connection.Port + "] " +
// "Received " + e.Length.ToString() + " bytes");
//Log.HexDump(Log.LogLevelType.Comm, e.Buffer);
// Append incoming Data to Global Recv Buffer
if (ReceiveBuffer == null)
{
ReceiveBuffer = e.Buffer;
}
else
{
int OldLength = ReceiveBuffer.Length;
Array.Resize(ref ReceiveBuffer, ReceiveBuffer.Length + e.Buffer.Length);
Array.Copy(e.Buffer, 0, ReceiveBuffer, OldLength, e.Buffer.Length);
}
byte[] WorkBuffer = null;
while (GetMessage(ref WorkBuffer) == true)
{
ParseMessage(WorkBuffer);
}
}
protected virtual void OnReceiveData(ConnectionReceiveDataEventArgs e)
{
var handler = ReceiveData;
if (handler != null)
{
handler(this, e);
}
}
private void ReceiveCallback(IAsyncResult ar)
{
// Retrieve the state object and the client socket
// from the asynchronous state object.
StateObject state = (StateObject)ar.AsyncState;
Socket client = state.WorkSocket;
SocketError error;
int bytesRead;
//ensure current client connection is the same as
//the one contained in the callback object
if (client != ClientSocket)
{
return;
}
if (ClientSocket == null)
{
return;
}
if (Connected == false)
{
return;
}
System.Threading.Monitor.Enter(countLock);
//Read data from the remote device.
try
{
bytesRead = client.EndReceive(ar, out error);
}
catch (SocketException e)
{
System.Threading.Monitor.Exit(countLock);
ConnectionErrorEventArgs args = new ConnectionErrorEventArgs();
args.ConnectionID = m_ID;
args.ErrorCode = e.ErrorCode;
args.ErrorMessage = e.Message;
OnError(args);
Disconnect();
return;
}
catch (Exception)
{
Disconnect();
return;
}
if ((bytesRead == 0) || (error != SocketError.Success))
{
System.Threading.Monitor.Exit(countLock);
if (error != SocketError.Success)
{
ConnectionErrorEventArgs args = new ConnectionErrorEventArgs();
args.ConnectionID = m_ID;
args.ErrorCode = (int)error;
args.ErrorMessage = "Disconnect: Bytes = " + bytesRead.ToString() + ", Error = " + error.ToString();
OnError(args);
}
Disconnect();
return;
}
Byte[] buffer = null;
if (bytesRead > 0)
{
buffer = new Byte[bytesRead];
Array.Copy(state.buffer, buffer, bytesRead);
}
System.Threading.Monitor.Exit(countLock);
if (bytesRead > 0)
{
ConnectionReceiveDataEventArgs RecvArgs = new ConnectionReceiveDataEventArgs();
RecvArgs.ConnectionID = m_ID;
RecvArgs.Buffer = buffer;
RecvArgs.Length = bytesRead;
OnReceiveData(RecvArgs);
}
//invoke could trigger disconnect (or disconnect via send()),
//which means our socket could be invalid
if (client != ClientSocket)
{
return;
}
if (ClientSocket == null)
{
return;
}
if (Connected == false)
{
return;
}
//Get the rest of the data.
try
{
client.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReceiveCallback), state);
}
catch (SocketException e)
{
ConnectionErrorEventArgs args = new ConnectionErrorEventArgs();
args.ConnectionID = m_ID;
args.ErrorCode = e.ErrorCode;
args.ErrorMessage = e.Message;
OnError(args);
Disconnect();
return;
}
catch (Exception)
{
Disconnect();
return;
}
}