import { LoggingInterface } from "./logging";
import { QuerySource } from "./query";
import { DnsQueryMessage, DnsResponseMessage } from "./core/protocol";
export declare type QueryHandler = (query: DnsQueryMessage, source: QuerySource) => DnsResponseMessage | Promise<DnsResponseMessage>;
export declare type OptionalQueryHandler = (query: DnsQueryMessage, source: QuerySource) => DnsResponseMessage | Promise<DnsResponseMessage | undefined> | undefined | void;
export interface ServerOptions {
    name?: string;
    address?: string;
    port?: number;
    log?: LoggingInterface;
}
export declare function startUdpServer(queryHandler: QueryHandler, options?: ServerOptions): void;