private void RepeatCallback(IAsyncResult result)
{
try {
int n = _socket.EndReceive(result);
if (n > 0)
{
_data.SetLength(0, n);
_handler.OnData(_data);
if (_socketStatus != SocketStatus.Closed)
{
RepeatAsyncRead();
}
}
else if (n < 0)
{
//in case of Win9x, EndReceive() returns 0 every 288 seconds even if no data is available
RepeatAsyncRead();
}
else
{
_handler.OnClosed();
}
}
catch (Exception ex) {
if ((ex is SocketException) && ((SocketException)ex).ErrorCode == 995)
{
//in case of .NET1.1 on Win9x, EndReceive() changes the behavior. it throws SocketException with an error code 995.
RepeatAsyncRead();
}
else if (_socketStatus != SocketStatus.Closed)
{
_handler.OnError(ex);
}
}
}
/// <summary>
/// Receiving thread
/// </summary>
private void ReceivingThread()
{
try {
while (true)
{
int n = _socket.Receive(_data.Data, 0, _data.Data.Length, SocketFlags.None);
if (n > 0)
{
_data.SetLength(0, n);
_handler.OnData(_data);
}
else if (n == 0)
{
// shut down detected
FireOnClosed();
break;
}
}
}
catch (ObjectDisposedException) {
// _socket has been closed
FireOnClosed();
}
catch (Exception ex) {
if (_socketStatus != SocketStatus.Closed)
{
_handler.OnError(ex);
}
}
}
public void StartReceivingThread(Action<DataFragment> onDataCallback, Action onClosedCallback)
{
if (_socket == null || _receivingThread != null) {
return;
}
_receivingThread = new Thread(() => {
byte[] buffer = new byte[0x20000];
DataFragment dataFrag = new DataFragment(buffer, 0, 0);
try {
while (true) {
int received = _socket.Receive(buffer, 0, buffer.Length, SocketFlags.None);
if (received > 0) {
dataFrag.SetLength(0, received);
onDataCallback(dataFrag);
}
}
}
catch (Exception e) {
if (!_shutdown) {
System.Diagnostics.Debug.WriteLine(e.Message);
System.Diagnostics.Debug.WriteLine(e.StackTrace);
}
if (!_socket.Connected && !_shutdown) {
// closed by the peer
onClosedCallback();
}
}
});
_receivingThread.Start();
}