public override IAsyncResult BeginSend(byte[] buffer, int offset, int size, SocketFlags socketFlags, AsyncCallback callback, Object state)
{
var client = _client;
Debug.WriteLine("Client ({0}): BeginSend", InternalRemoteEndPoint);
CheckDisposed();
if (_shutdown.HasValue && (_shutdown == SocketShutdown.Send || _shutdown == SocketShutdown.Both))
{
throw new SocketException(SocketError.Shutdown);
}
if (client.ClientStatus != SocketStatus.SOCKET_STATUS_CONNECTED)
{
throw new SocketException(SocketError.NotConnected);
}
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
if (offset < 0 || offset > buffer.Length)
{
throw new ArgumentOutOfRangeException("offset");
}
if (size < 0 || size > buffer.Length - offset)
{
throw new ArgumentOutOfRangeException("size");
}
var ssir = new SocketClientSendAsyncResult {
AsyncState = state
};
if (size == 0)
{
ssir.CompletedSynchronously = true;
((CEvent)ssir.AsyncWaitHandle).Set();
ssir.IsCompleted = true;
ssir.errorCode = SocketErrorCodes.SOCKET_OK;
if (callback != null)
{
DoAsyncCallback(callback, ssir);
}
}
else
{
var result = client.SendDataAsync(buffer, offset, size, AsyncSendComplete, new AsyncSendState(ssir, callback));
if (result != SocketErrorCodes.SOCKET_OK && result != SocketErrorCodes.SOCKET_OPERATION_PENDING)
{
throw new SocketException(result.ToError());
}
}
return(ssir);
}
public AsyncSendState(SocketClientSendAsyncResult asyncResult, AsyncCallback asyncCallback)
{
AsyncResult = asyncResult;
AsyncCallback = asyncCallback;
}
