return
		}
	}

	rulesMap := event.NewRulesMap(eventNames, pattern, event.TargetID{ID: mustGetUUID()})

	setEventStreamHeaders(w)

	// Listen Publisher and peer-listen-client uses nonblocking send and hence does not wait for slow receivers.
	// Use buffered channel to take care of burst sends or slow w.Write()

		}
	case <-listener.ctx.Done():
	}
	return nil, syscall.EINVAL
}

// Close - closes underneath all TCP listeners.
func (listener *httpListener) Close() (err error) {
	listener.ctxCanceler()

	for i := range listener.tcpListeners {
		listener.tcpListeners[i].Close()
	}

	return nil
}

		},
	}

	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
	defer cancel()

	l, err := lc.Listen(ctx, "tcp", net.JoinHostPort(host, port))
	if err != nil {
		return err
	}

	// As we are able to listen on this network, the port is not in use.
	// Close the listener and continue check other networks.
	return l.Close()

// Note: The check method tries to listen on given port and closes it.
// It is possible to have a disconnected client in this tiny window of time.
func CheckPortAvailability(host, port string, opts TCPOptions) (err error) {
	lc := &net.ListenConfig{}

	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
	defer cancel()

	l, err := lc.Listen(ctx, "tcp", net.JoinHostPort(host, port))
	if err != nil {

				panic(err)
			}
		}
	}
}

func getHosts(n int) (hosts []string, listeners []net.Listener, err error) {
	for i := 0; i < n; i++ {
		l, err := net.Listen("tcp", "127.0.0.1:0")
		if err != nil {
			if l, err = net.Listen("tcp6", "[::1]:0"); err != nil {
				return nil, nil, fmt.Errorf("httptest: failed to listen on a port: %v", err)
			}
		}
		addr := l.Addr()
		hosts = append(hosts, "http://"+addr.String())

	}

	var err error
	listener, err := net.Listen("unix", path)
	if err != nil {
		return nil, fmt.Errorf("failed to listen on unix socket %q: %v", path, err)
	}

	// Update file permission so that cni plugin has permission to access it.
	if _, err := os.Stat(path); err != nil {
		return nil, fmt.Errorf("cni listener file %q doesn't exist", path)
	}

)

func SetupMonitoring(port int, path string, stop <-chan struct{}) {
	if port <= 0 {
		return
	}
	mux := http.NewServeMux()
	var listener net.Listener
	var err error
	if listener, err = net.Listen("tcp", fmt.Sprintf(":%d", port)); err != nil {
		log.Errorf("unable to listen on socket: %v", err)
		return
	}
	exporter, err := monitoring.RegisterPrometheusExporter(nil, nil)
	if err != nil {

	if runtime.GOOS != "linux" {
		t.Skip()
	}

	l, err := net.Listen("tcp", "localhost:0") // ask kernel for a free port.
	if err != nil {
		t.Fatal(err)
	}
	defer l.Close()

	port := l.Addr().(*net.TCPAddr).Port

	testCases := []struct {
		host        string
		port        int
		expectedErr error
	}{
		{"", port, fmt.Errorf("listen tcp :%v: bind: address already in use", port)},

		}
		return nil
	})
}

// Listen - listen on peers.
func (client *peerRESTClient) Listen(ctx context.Context, listenCh chan<- []byte, v url.Values) {
	go func() {
		for {
			client.doListen(ctx, listenCh, v)
			select {
			case <-ctx.Done():
				return
			default:
				// There was error in the REST request, retry after sometime as probably the peer is down.
				time.Sleep(5 * time.Second)
			}
		}

			// If the cniListener exits, at least we should record an error log
			log.Errorf("CNI listener server exiting unexpectedly: %v", err)
		}
	}()

	context.AfterFunc(s.ctx, func() {
		if err := s.cniListenServer.Close(); err != nil {
			log.Errorf("CNI listen server terminated with error: %v", err)
		} else {
			log.Debug("CNI listen server terminated")
		}
	})
	return nil
}