/// <reference types="node" />
import { EventEmitter } from 'events';
import { kConns, kSocket, kState, kServer, kIntervalCheck } from './internal/symbol';
import { ConnectionID } from './internal/protocol';
import { Socket, AddressInfo } from './socket';
import { Session } from './session';
export declare class ServerSession extends Session {
    [kServer]: Server;
    constructor(id: ConnectionID, socket: Socket, server: Server);
    readonly server: Server;
}
export declare class ServerState {
    destroyed: boolean;
    constructor();
}
export declare class Server extends EventEmitter {
    [kSocket]: Socket | null;
    [kState]: ServerState;
    localFamily: string;
    localAddress: string;
    localPort: number;
    listening: boolean;
    private [kConns];
    private [kIntervalCheck];
    constructor();
    address(): AddressInfo;
    listen(port: number, address?: string): Promise<{}>;
    _intervalCheck(time: number): void;
    shutdown(_timeout: number): Promise<void>;
    close(err?: any): Promise<void>;
    getConnections(): Promise<number>;
    ref(): void;
    unref(): void;
}