public async Task<bool> Open(string address = null, int port = -1)
{
try
{
IPEndPoint server = new IPEndPoint(IPAddress.Parse(_address), _port);
SocketAsyncEventArgs args = new SocketAsyncEventArgs();
args.SocketFlags = SocketFlags.None;
args.RemoteEndPoint = server;
var awaitable = new SocketAwaitable(args);
awaitable.OnCompleted(() => {
RaiseConnected();
//Flush();
//Receive();
});
_socket = new Socket(server.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
await _socket.ConnectAsync(awaitable);
return awaitable.IsCompleted;
}
catch (Exception ex)
{
RaiseError(ex);
throw;
}
}
public async Task<bool> Close()
{
try
{
if (_socket != null && _socket.Connected)
{
await Flush();
_socket.Shutdown(SocketShutdown.Both);
SocketAsyncEventArgs args = new SocketAsyncEventArgs();
var awaitable = new SocketAwaitable(args);
awaitable.OnCompleted(() => {
RaiseDisconnected();
// cancel pending receives
});
await _socket.DisconnectAsync(awaitable);
return !awaitable.IsCompleted;
}
return false;
}
catch (Exception ex)
{
RaiseError(ex);
throw;
}
}
public async Task<bool> Flush()
{
try
{
if (_socket == null)
return false;
if (_tosend.IsEmpty)
return false;
byte[] data;
while (_tosend.TryDequeue(out data))
{
SocketAsyncEventArgs args = new SocketAsyncEventArgs();
args.SetBuffer(data, 0, data.Length);
var awaitable = new SocketAwaitable(args);
awaitable.OnCompleted(() => {
RaiseSent(awaitable.GetResult());
});
await _socket.SendAsync(awaitable);
}
return true;
}
catch (Exception ex)
{
RaiseError(ex);
throw;
}
}
