private void HandleOnDataFrameRecvd(RecvdDataFrameEventArgs e)
{
Debug.Log("handling");
if (e.Status == DataFrameStatus.Normal)
{
packet = e.Data;
saved.DeckDeserializer(packet.Frame);
hasRecvdData = true;
}
}
private void OnRecv(IAsyncResult ar)
{
SocketState socketState = ar.AsyncState as SocketState;
try {
int bytesRead = socketState.ReaderSocket.EndReceive(ar); // read bytes from stream
socketState.TotalBytesRead += bytesRead; // keep track of how many bytes we've read from the stream for the current dataframe
if (socketState.ExpectedFrameSize == -1) // get the data frame size
{
if (bytesRead <= 0)
{
Debug.Log("Zero bytes recvd"); // TODO: handle ...with exception?
}
if (socketState.TotalBytesRead == 4) // we filled the 4-byte dataframe size buffer
{
int nbo = BitConverter.ToInt32(socketState.FrameSize, 0); // read the 4-byte buffer
socketState.ExpectedFrameSize = IPAddress.NetworkToHostOrder(nbo); // convert the read from network byte order to little e
if (socketState.ExpectedFrameSize < 0)
{
Debug.Log("Invalid Framesize"); // TODO: handle ...
}
socketState.DataFrame = new DataFramePacket(socketState.ExpectedFrameSize);
socketState.IsFrameSizeKnown = true;
socketState.TotalBytesRead = 0; // reset num bytes read cus we dont want the framesize byte count included
}
if (socketState.ExpectedFrameSize != 0) // if expectedframesize not 0 || -1, check why
{
if (socketState.IsFrameSizeKnown) // if framesize known, switch to using the dataframe buffer
{
serverSocket.BeginReceive(socketState.DataFrame.Frame, 0,
socketState.DataFrame.Frame.Length,
SocketFlags.None, new AsyncCallback(OnRecv),
socketState);
}
else // wait for more bytes to get the framesize
{
serverSocket.BeginReceive(socketState.FrameSize,
socketState.TotalBytesRead, // offset
socketState.FrameSize.Length - socketState.TotalBytesRead, // remaining bytes needed to get a complete framesize
SocketFlags.None, new AsyncCallback(OnRecv),
socketState);
}
}
else // a 0 means keep alive
{
RecvdDataFrameEventArgs args = new RecvdDataFrameEventArgs(null, DataFrameStatus.KeepAlive);
RaiseDataFrameRecvd(args); // notify listeners of keep alive packet
socketState.InitState( );
}
}
else
{
if (socketState.TotalBytesRead == socketState.ExpectedFrameSize) // we've got the entire msg
{
RecvdDataFrameEventArgs args = new RecvdDataFrameEventArgs(socketState.DataFrame, DataFrameStatus.Normal);
RaiseDataFrameRecvd(args); // notify listeners of the incoming daraframe
socketState.InitState( ); // reset socket state
socketState.ReaderSocket = serverSocket;
serverSocket.BeginReceive(socketState.FrameSize, 0, // reenter the listen loop
socketState.FrameSize.Length, SocketFlags.None,
new AsyncCallback(OnRecv), socketState);
}
else
{
if (bytesRead <= 0)
{
Debug.Log("Zero bytes recvd"); // TODO: handle ...with exception?
}
serverSocket.BeginReceive(socketState.DataFrame.Frame,
socketState.TotalBytesRead, // offset
socketState.DataFrame.Frame.Length - socketState.TotalBytesRead, // remaining buffer
SocketFlags.None, new AsyncCallback(OnRecv),
socketState);
}
}
} catch (ObjectDisposedException ode) {
Debug.Log(ode);
} catch (Exception e) {
Debug.Log(e);
}
}
