// async
public void StartSend(byte[] data, SocketSendEventHandler externalCallback = null, object externalCallbackState = null)
{
SendStateObject state = new SendStateObject();
state.workSocket = _socket;
state.externalCallback = externalCallback;
state.externalCallbackState = externalCallbackState;
_socket.BeginSend(data, 0, data.Length, SocketFlags.None,
new System.AsyncCallback(SendCallback), state);
}
private void SendCallback(IAsyncResult ar)
{
try
{
SendStateObject state = (SendStateObject)ar.AsyncState;
Socket handler = state.workSocket;
handler.EndSend(ar); // BUG: returns before data sent
SocketSendEvent?.Invoke(this, new SocketSendEventArgs(state, this));
if (state.externalCallback != null)
{
state.externalCallback(this, new SocketSendEventArgs(state, this));
}
}
catch (ObjectDisposedException) { } // socket closed
catch (SocketException) { } // socket closed by peer
}
public SocketSendEventArgs(SendStateObject state, SockBase handler)
{
State = state; Handler = handler;
}