log.Warnf("Failed to create directory for %v: %v", path, err)
	}

	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 {

		Control: setTCPParametersFn(opts),
	}

	for i, serverAddr := range serverAddrs {
		var (
			l net.Listener
			e error
		)
		if l, e = listenCfg.Listen(ctx, "tcp", serverAddr); e != nil {
			if opts.Trace != nil {
				opts.Trace(fmt.Sprint("listenCfg.Listen: ", e.Error()))
			}

			listenErrs[i] = e
			continue
		}

		tcpListener, ok := l.(*net.TCPListener)
		if !ok {