/**
 * Copyright 2019 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the 'License');
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an 'AS IS' BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/// <reference types="node" />
import EventEmitter from 'events';
import Interface from './Interface';
import { TransportType } from './transports';
import { SocketLike } from './Socket';
export default class Link extends EventEmitter {
    closed: boolean;
    private transports;
    constructor(intf: Interface, mtu: number, requestedTransports?: TransportType[]);
    openSocket(transportName: string, port: number, timeout?: number): Promise<SocketLike>;
    down(): void;
}