Poderosa.PortForwarding.LocalToRemoteChannelFactory.OnRequested C# (CSharp) Method

        private void OnRequested(IAsyncResult r)
        {
            try {
                if (_closed)
                    return; //SSH切断があったときは非同期受信から戻ってくるが、EndAcceptを呼んでもObjectDisposedExceptionになるだけ
                Socket local = _bindedLocalSocket.EndAccept(r);
                //Port Forwarding
                Channel newChannel;
                lock (_connection) {
                    newChannel = _connection.ForwardPort(
                        channel => {
                            return new Channel(_profile.SSHHost, local.RemoteEndPoint.ToString(), _id, channel, local);
                        },
                        _profile.DestinationHost,
                        _profile.DestinationPort,
                        "localhost",    // FIXME
                        0   // FIXME
                    );

                    var isReady = newChannel.WaitReady();
                    if (!isReady) {
                        // failed to port forwarding
                        Debug.WriteLine("failed to port forwarding");
                        // the accepted socket will already be closed (at the time of the channel's close)
                        return;
                    }

                    newChannel.StartAsyncReceive();
                }
            }
            catch (Exception ex) {
                if (!_closed) {
                    Debug.WriteLine(ex.Message);
                    Debug.WriteLine(ex.StackTrace);
                    Util.InterThreadWarning(ex.Message);
                }
            }
            finally {
                if (!_closed) {
                    _bindedLocalSocket.BeginAccept(new AsyncCallback(OnRequested), null);
                    Debug.WriteLine("BeginAccept again");
                }
            }
        }