import { Packet, PacketFilter } from './packet';
import { InputSocket, SocketDescriptor, OutputSocket } from './socket';
import { VoidCallback } from '../common-types';
export declare class SocketFifoQueue extends InputSocket {
    private _onPacketWasQueued;
    private _packets;
    constructor(_onPacketWasQueued?: VoidCallback, descr?: SocketDescriptor);
    peek(): Packet;
    pop(): Packet;
    dequeue(): Packet;
    drop(): void;
    get length(): number;
    private _onReceive;
    private _push;
}
export declare class SocketFifoValve extends OutputSocket {
    private _queue;
    private _filters;
    constructor(_queue: SocketFifoQueue, sd: SocketDescriptor);
    get queue(): SocketFifoQueue;
    get filters(): PacketFilter[];
    addPacketFilterPass(filter: PacketFilter): SocketFifoValve;
    transferOne(): void;
    drain(): void;
}
export declare function wrapOutputSocketWithValve(output: OutputSocket, onPacketWasQueued?: VoidCallback): SocketFifoValve;