dns.d.ts

/**
 * The `dns` module enables name resolution. For example, use it to look up IP
 * addresses of host names.
 *
 * Although named for the [Domain Name System (DNS)](https://en.wikipedia.org/wiki/Domain_Name_System), it does not always use the
 * DNS protocol for lookups. {@link lookup} uses the operating system
 * facilities to perform name resolution. It may not need to perform any network
 * communication. To perform name resolution the way other applications on the same
 * system do, use {@link lookup}.
 *
 * ```js
 * const dns = require('dns');
 *
 * dns.lookup('example.org', (err, address, family) => {
 *   console.log('address: %j family: IPv%s', address, family);
 * });
 * // address: "93.184.216.34" family: IPv4
 * ```
 *
 * All other functions in the `dns` module connect to an actual DNS server to
 * perform name resolution. They will always use the network to perform DNS
 * queries. These functions do not use the same set of configuration files used by {@link lookup} (e.g. `/etc/hosts`). Use these functions to always perform
 * DNS queries, bypassing other name-resolution facilities.
 *
 * ```js
 * const dns = require('dns');
 *
 * dns.resolve4('archive.org', (err, addresses) => {
 *   if (err) throw err;
 *
 *   console.log(`addresses: ${JSON.stringify(addresses)}`);
 *
 *   addresses.forEach((a) => {
 *     dns.reverse(a, (err, hostnames) => {
 *       if (err) {
 *         throw err;
 *       }
 *       console.log(`reverse for ${a}: ${JSON.stringify(hostnames)}`);
 *     });
 *   });
 * });
 * ```
 *
 * See the `Implementation considerations section` for more information.
 * @see [source](https://github.com/nodejs/node/blob/v17.0.0/lib/dns.js)
 */
declare module 'dns' {
    import * as dnsPromises from 'node:dns/promises';
    // Supported getaddrinfo flags.
    export const ADDRCONFIG: number;
    export const V4MAPPED: number;
    /**
     * If `dns.V4MAPPED` is specified, return resolved IPv6 addresses as
     * well as IPv4 mapped IPv6 addresses.
     */
    export const ALL: number;
    export interface LookupOptions {
        family?: number | undefined;
        hints?: number | undefined;
        all?: boolean | undefined;
        /**
         * @default true
         */
        verbatim?: boolean | undefined;
    }
    export interface LookupOneOptions extends LookupOptions {
        all?: false | undefined;
    }
    export interface LookupAllOptions extends LookupOptions {
        all: true;
    }
    export interface LookupAddress {
        address: string;
        family: number;
    }
    /**
     * Resolves a host name (e.g. `'nodejs.org'`) into the first found A (IPv4) or
     * AAAA (IPv6) record. All `option` properties are optional. If `options` is an
     * integer, then it must be `4` or `6` – if `options` is not provided, then IPv4
     * and IPv6 addresses are both returned if found.
     *
     * With the `all` option set to `true`, the arguments for `callback` change to`(err, addresses)`, with `addresses` being an array of objects with the
     * properties `address` and `family`.
     *
     * On error, `err` is an `Error` object, where `err.code` is the error code.
     * Keep in mind that `err.code` will be set to `'ENOTFOUND'` not only when
     * the host name does not exist but also when the lookup fails in other ways
     * such as no available file descriptors.
     *
     * `dns.lookup()` does not necessarily have anything to do with the DNS protocol.
     * The implementation uses an operating system facility that can associate names
     * with addresses, and vice versa. This implementation can have subtle but
     * important consequences on the behavior of any Node.js program. Please take some
     * time to consult the `Implementation considerations section` before using`dns.lookup()`.
     *
     * Example usage:
     *
     * ```js
     * const dns = require('dns');
     * const options = {
     *   family: 6,
     *   hints: dns.ADDRCONFIG | dns.V4MAPPED,
     * };
     * dns.lookup('example.com', options, (err, address, family) =>
     *   console.log('address: %j family: IPv%s', address, family));
     * // address: "2606:2800:220:1:248:1893:25c8:1946" family: IPv6
     *
     * // When options.all is true, the result will be an Array.
     * options.all = true;
     * dns.lookup('example.com', options, (err, addresses) =>
     *   console.log('addresses: %j', addresses));
     * // addresses: [{"address":"2606:2800:220:1:248:1893:25c8:1946","family":6}]
     * ```
     *
     * If this method is invoked as its `util.promisify()` ed version, and `all`is not set to `true`, it returns a `Promise` for an `Object` with `address` and`family` properties.
     * @since v0.1.90
     */
    export function lookup(hostname: string, family: number, callback: (err: NodeJS.ErrnoException | null, address: string, family: number) => void): void;
    export function lookup(hostname: string, options: LookupOneOptions, callback: (err: NodeJS.ErrnoException | null, address: string, family: number) => void): void;
    export function lookup(hostname: string, options: LookupAllOptions, callback: (err: NodeJS.ErrnoException | null, addresses: LookupAddress[]) => void): void;
    export function lookup(hostname: string, options: LookupOptions, callback: (err: NodeJS.ErrnoException | null, address: string | LookupAddress[], family: number) => void): void;
    export function lookup(hostname: string, callback: (err: NodeJS.ErrnoException | null, address: string, family: number) => void): void;
    export namespace lookup {
        function __promisify__(hostname: string, options: LookupAllOptions): Promise<LookupAddress[]>;
        function __promisify__(hostname: string, options?: LookupOneOptions | number): Promise<LookupAddress>;
        function __promisify__(hostname: string, options: LookupOptions): Promise<LookupAddress | LookupAddress[]>;
    }
    /**
     * Resolves the given `address` and `port` into a host name and service using
     * the operating system's underlying `getnameinfo` implementation.
     *
     * If `address` is not a valid IP address, a `TypeError` will be thrown.
     * The `port` will be coerced to a number. If it is not a legal port, a `TypeError`will be thrown.
     *
     * On an error, `err` is an `Error` object, where `err.code` is the error code.
     *
     * ```js
     * const dns = require('dns');
     * dns.lookupService('127.0.0.1', 22, (err, hostname, service) => {
     *   console.log(hostname, service);
     *   // Prints: localhost ssh
     * });
     * ```
     *
     * If this method is invoked as its `util.promisify()` ed version, it returns a`Promise` for an `Object` with `hostname` and `service` properties.
     * @since v0.11.14
     */
    export function lookupService(address: string, port: number, callback: (err: NodeJS.ErrnoException | null, hostname: string, service: string) => void): void;
    export namespace lookupService {
        function __promisify__(
            address: string,
            port: number
        ): Promise<{
            hostname: string;
            service: string;
        }>;
    }
    export interface ResolveOptions {
        ttl: boolean;
    }
    export interface ResolveWithTtlOptions extends ResolveOptions {
        ttl: true;
    }
    export interface RecordWithTtl {
        address: string;
        ttl: number;
    }
    /** @deprecated Use `AnyARecord` or `AnyAaaaRecord` instead. */
    export type AnyRecordWithTtl = AnyARecord | AnyAaaaRecord;
    export interface AnyARecord extends RecordWithTtl {
        type: 'A';
    }
    export interface AnyAaaaRecord extends RecordWithTtl {
        type: 'AAAA';
    }
    export interface CaaRecord {
        critial: number;
        issue?: string | undefined;
        issuewild?: string | undefined;
        iodef?: string | undefined;
        contactemail?: string | undefined;
        contactphone?: string | undefined;
    }
    export interface MxRecord {
        priority: number;
        exchange: string;
    }
    export interface AnyMxRecord extends MxRecord {
        type: 'MX';
    }
    export interface NaptrRecord {
        flags: string;
        service: string;
        regexp: string;
        replacement: string;
        order: number;
        preference: number;
    }
    export interface AnyNaptrRecord extends NaptrRecord {
        type: 'NAPTR';
    }
    export interface SoaRecord {
        nsname: string;
        hostmaster: string;
        serial: number;
        refresh: number;
        retry: number;
        expire: number;
        minttl: number;
    }
    export interface AnySoaRecord extends SoaRecord {
        type: 'SOA';
    }
    export interface SrvRecord {
        priority: number;
        weight: number;
        port: number;
        name: string;
    }
    export interface AnySrvRecord extends SrvRecord {
        type: 'SRV';
    }
    export interface AnyTxtRecord {
        type: 'TXT';
        entries: string[];
    }
    export interface AnyNsRecord {
        type: 'NS';
        value: string;
    }
    export interface AnyPtrRecord {
        type: 'PTR';
        value: string;
    }
    export interface AnyCnameRecord {
        type: 'CNAME';
        value: string;
    }
    export type AnyRecord = AnyARecord | AnyAaaaRecord | AnyCnameRecord | AnyMxRecord | AnyNaptrRecord | AnyNsRecord | AnyPtrRecord | AnySoaRecord | AnySrvRecord | AnyTxtRecord;
    /**
     * Uses the DNS protocol to resolve a host name (e.g. `'nodejs.org'`) into an array
     * of the resource records. The `callback` function has arguments`(err, records)`. When successful, `records` will be an array of resource
     * records. The type and structure of individual results varies based on `rrtype`:
     *
     * <omitted>
     *
     * On error, `err` is an `Error` object, where `err.code` is one of theDNS error codes.
     * @since v0.1.27
     * @param hostname Host name to resolve.
     * @param [rrtype='A'] Resource record type.
     */
    export function resolve(hostname: string, callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void): void;
    export function resolve(hostname: string, rrtype: 'A', callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void): void;
    export function resolve(hostname: string, rrtype: 'AAAA', callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void): void;
    export function resolve(hostname: string, rrtype: 'ANY', callback: (err: NodeJS.ErrnoException | null, addresses: AnyRecord[]) => void): void;
    export function resolve(hostname: string, rrtype: 'CNAME', callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void): void;
    export function resolve(hostname: string, rrtype: 'MX', callback: (err: NodeJS.ErrnoException | null, addresses: MxRecord[]) => void): void;
    export function resolve(hostname: string, rrtype: 'NAPTR', callback: (err: NodeJS.ErrnoException | null, addresses: NaptrRecord[]) => void): void;
    export function resolve(hostname: string, rrtype: 'NS', callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void): void;
    export function resolve(hostname: string, rrtype: 'PTR', callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void): void;
    export function resolve(hostname: string, rrtype: 'SOA', callback: (err: NodeJS.ErrnoException | null, addresses: SoaRecord) => void): void;
    export function resolve(hostname: string, rrtype: 'SRV', callback: (err: NodeJS.ErrnoException | null, addresses: SrvRecord[]) => void): void;
    export function resolve(hostname: string, rrtype: 'TXT', callback: (err: NodeJS.ErrnoException | null, addresses: string[][]) => void): void;
    export function resolve(
        hostname: string,
        rrtype: string,
        callback: (err: NodeJS.ErrnoException | null, addresses: string[] | MxRecord[] | NaptrRecord[] | SoaRecord | SrvRecord[] | string[][] | AnyRecord[]) => void
    ): void;
    export namespace resolve {
        function __promisify__(hostname: string, rrtype?: 'A' | 'AAAA' | 'CNAME' | 'NS' | 'PTR'): Promise<string[]>;
        function __promisify__(hostname: string, rrtype: 'ANY'): Promise<AnyRecord[]>;
        function __promisify__(hostname: string, rrtype: 'MX'): Promise<MxRecord[]>;
        function __promisify__(hostname: string, rrtype: 'NAPTR'): Promise<NaptrRecord[]>;
        function __promisify__(hostname: string, rrtype: 'SOA'): Promise<SoaRecord>;
        function __promisify__(hostname: string, rrtype: 'SRV'): Promise<SrvRecord[]>;
        function __promisify__(hostname: string, rrtype: 'TXT'): Promise<string[][]>;
        function __promisify__(hostname: string, rrtype: string): Promise<string[] | MxRecord[] | NaptrRecord[] | SoaRecord | SrvRecord[] | string[][] | AnyRecord[]>;
    }
    /**
     * Uses the DNS protocol to resolve a IPv4 addresses (`A` records) for the`hostname`. The `addresses` argument passed to the `callback` function
     * will contain an array of IPv4 addresses (e.g.`['74.125.79.104', '74.125.79.105', '74.125.79.106']`).
     * @since v0.1.16
     * @param hostname Host name to resolve.
     */
    export function resolve4(hostname: string, callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void): void;
    export function resolve4(hostname: string, options: ResolveWithTtlOptions, callback: (err: NodeJS.ErrnoException | null, addresses: RecordWithTtl[]) => void): void;
    export function resolve4(hostname: string, options: ResolveOptions, callback: (err: NodeJS.ErrnoException | null, addresses: string[] | RecordWithTtl[]) => void): void;
    export namespace resolve4 {
        function __promisify__(hostname: string): Promise<string[]>;
        function __promisify__(hostname: string, options: ResolveWithTtlOptions): Promise<RecordWithTtl[]>;
        function __promisify__(hostname: string, options?: ResolveOptions): Promise<string[] | RecordWithTtl[]>;
    }
    /**
     * Uses the DNS protocol to resolve a IPv6 addresses (`AAAA` records) for the`hostname`. The `addresses` argument passed to the `callback` function
     * will contain an array of IPv6 addresses.
     * @since v0.1.16
     * @param hostname Host name to resolve.
     */
    export function resolve6(hostname: string, callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void): void;
    export function resolve6(hostname: string, options: ResolveWithTtlOptions, callback: (err: NodeJS.ErrnoException | null, addresses: RecordWithTtl[]) => void): void;
    export function resolve6(hostname: string, options: ResolveOptions, callback: (err: NodeJS.ErrnoException | null, addresses: string[] | RecordWithTtl[]) => void): void;
    export namespace resolve6 {
        function __promisify__(hostname: string): Promise<string[]>;
        function __promisify__(hostname: string, options: ResolveWithTtlOptions): Promise<RecordWithTtl[]>;
        function __promisify__(hostname: string, options?: ResolveOptions): Promise<string[] | RecordWithTtl[]>;
    }
    /**
     * Uses the DNS protocol to resolve `CNAME` records for the `hostname`. The`addresses` argument passed to the `callback` function
     * will contain an array of canonical name records available for the `hostname`(e.g. `['bar.example.com']`).
     * @since v0.3.2
     */
    export function resolveCname(hostname: string, callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void): void;
    export namespace resolveCname {
        function __promisify__(hostname: string): Promise<string[]>;
    }
    /**
     * Uses the DNS protocol to resolve `CAA` records for the `hostname`. The`addresses` argument passed to the `callback` function
     * will contain an array of certification authority authorization records
     * available for the `hostname` (e.g. `[{critical: 0, iodef: 'mailto:pki@example.com'}, {critical: 128, issue: 'pki.example.com'}]`).
     * @since v15.0.0, v14.17.0
     */
    export function resolveCaa(hostname: string, callback: (err: NodeJS.ErrnoException | null, records: CaaRecord[]) => void): void;
    export namespace resolveCaa {
        function __promisify__(hostname: string): Promise<CaaRecord[]>;
    }
    /**
     * Uses the DNS protocol to resolve mail exchange records (`MX` records) for the`hostname`. The `addresses` argument passed to the `callback` function will
     * contain an array of objects containing both a `priority` and `exchange`property (e.g. `[{priority: 10, exchange: 'mx.example.com'}, ...]`).
     * @since v0.1.27
     */
    export function resolveMx(hostname: string, callback: (err: NodeJS.ErrnoException | null, addresses: MxRecord[]) => void): void;
    export namespace resolveMx {
        function __promisify__(hostname: string): Promise<MxRecord[]>;
    }
    /**
     * Uses the DNS protocol to resolve regular expression based records (`NAPTR`records) for the `hostname`. The `addresses` argument passed to the `callback`function will contain an array of
     * objects with the following properties:
     *
     * * `flags`
     * * `service`
     * * `regexp`
     * * `replacement`
     * * `order`
     * * `preference`
     *
     * ```js
     * {
     *   flags: 's',
     *   service: 'SIP+D2U',
     *   regexp: '',
     *   replacement: '_sip._udp.example.com',
     *   order: 30,
     *   preference: 100
     * }
     * ```
     * @since v0.9.12
     */
    export function resolveNaptr(hostname: string, callback: (err: NodeJS.ErrnoException | null, addresses: NaptrRecord[]) => void): void;
    export namespace resolveNaptr {
        function __promisify__(hostname: string): Promise<NaptrRecord[]>;
    }
    /**
     * Uses the DNS protocol to resolve name server records (`NS` records) for the`hostname`. The `addresses` argument passed to the `callback` function will
     * contain an array of name server records available for `hostname`(e.g. `['ns1.example.com', 'ns2.example.com']`).
     * @since v0.1.90
     */
    export function resolveNs(hostname: string, callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void): void;
    export namespace resolveNs {
        function __promisify__(hostname: string): Promise<string[]>;
    }
    /**
     * Uses the DNS protocol to resolve pointer records (`PTR` records) for the`hostname`. The `addresses` argument passed to the `callback` function will
     * be an array of strings containing the reply records.
     * @since v6.0.0
     */
    export function resolvePtr(hostname: string, callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void): void;
    export namespace resolvePtr {
        function __promisify__(hostname: string): Promise<string[]>;
    }
    /**
     * Uses the DNS protocol to resolve a start of authority record (`SOA` record) for
     * the `hostname`. The `address` argument passed to the `callback` function will
     * be an object with the following properties:
     *
     * * `nsname`
     * * `hostmaster`
     * * `serial`
     * * `refresh`
     * * `retry`
     * * `expire`
     * * `minttl`
     *
     * ```js
     * {
     *   nsname: 'ns.example.com',
     *   hostmaster: 'root.example.com',
     *   serial: 2013101809,
     *   refresh: 10000,
     *   retry: 2400,
     *   expire: 604800,
     *   minttl: 3600
     * }
     * ```
     * @since v0.11.10
     */
    export function resolveSoa(hostname: string, callback: (err: NodeJS.ErrnoException | null, address: SoaRecord) => void): void;
    export namespace resolveSoa {
        function __promisify__(hostname: string): Promise<SoaRecord>;
    }
    /**
     * Uses the DNS protocol to resolve service records (`SRV` records) for the`hostname`. The `addresses` argument passed to the `callback` function will
     * be an array of objects with the following properties:
     *
     * * `priority`
     * * `weight`
     * * `port`
     * * `name`
     *
     * ```js
     * {
     *   priority: 10,
     *   weight: 5,
     *   port: 21223,
     *   name: 'service.example.com'
     * }
     * ```
     * @since v0.1.27
     */
    export function resolveSrv(hostname: string, callback: (err: NodeJS.ErrnoException | null, addresses: SrvRecord[]) => void): void;
    export namespace resolveSrv {
        function __promisify__(hostname: string): Promise<SrvRecord[]>;
    }
    /**
     * Uses the DNS protocol to resolve text queries (`TXT` records) for the`hostname`. The `records` argument passed to the `callback` function is a
     * two-dimensional array of the text records available for `hostname` (e.g.`[ ['v=spf1 ip4:0.0.0.0 ', '~all' ] ]`). Each sub-array contains TXT chunks of
     * one record. Depending on the use case, these could be either joined together or
     * treated separately.
     * @since v0.1.27
     */
    export function resolveTxt(hostname: string, callback: (err: NodeJS.ErrnoException | null, addresses: string[][]) => void): void;
    export namespace resolveTxt {
        function __promisify__(hostname: string): Promise<string[][]>;
    }
    /**
     * Uses the DNS protocol to resolve all records (also known as `ANY` or `*` query).
     * The `ret` argument passed to the `callback` function will be an array containing
     * various types of records. Each object has a property `type` that indicates the
     * type of the current record. And depending on the `type`, additional properties
     * will be present on the object:
     *
     * <omitted>
     *
     * Here is an example of the `ret` object passed to the callback:
     *
     * ```js
     * [ { type: 'A', address: '127.0.0.1', ttl: 299 },
     *   { type: 'CNAME', value: 'example.com' },
     *   { type: 'MX', exchange: 'alt4.aspmx.l.example.com', priority: 50 },
     *   { type: 'NS', value: 'ns1.example.com' },
     *   { type: 'TXT', entries: [ 'v=spf1 include:_spf.example.com ~all' ] },
     *   { type: 'SOA',
     *     nsname: 'ns1.example.com',
     *     hostmaster: 'admin.example.com',
     *     serial: 156696742,
     *     refresh: 900,
     *     retry: 900,
     *     expire: 1800,
     *     minttl: 60 } ]
     * ```
     *
     * DNS server operators may choose not to respond to `ANY`queries. It may be better to call individual methods like {@link resolve4},{@link resolveMx}, and so on. For more details, see [RFC
     * 8482](https://tools.ietf.org/html/rfc8482).
     */
    export function resolveAny(hostname: string, callback: (err: NodeJS.ErrnoException | null, addresses: AnyRecord[]) => void): void;
    export namespace resolveAny {
        function __promisify__(hostname: string): Promise<AnyRecord[]>;
    }
    /**
     * Performs a reverse DNS query that resolves an IPv4 or IPv6 address to an
     * array of host names.
     *
     * On error, `err` is an `Error` object, where `err.code` is
     * one of the `DNS error codes`.
     * @since v0.1.16
     */
    export function reverse(ip: string, callback: (err: NodeJS.ErrnoException | null, hostnames: string[]) => void): void;
    /**
     * Sets the IP address and port of servers to be used when performing DNS
     * resolution. The `servers` argument is an array of [RFC 5952](https://tools.ietf.org/html/rfc5952#section-6) formatted
     * addresses. If the port is the IANA default DNS port (53) it can be omitted.
     *
     * ```js
     * dns.setServers([
     *   '4.4.4.4',
     *   '[2001:4860:4860::8888]',
     *   '4.4.4.4:1053',
     *   '[2001:4860:4860::8888]:1053',
     * ]);
     * ```
     *
     * An error will be thrown if an invalid address is provided.
     *
     * The `dns.setServers()` method must not be called while a DNS query is in
     * progress.
     *
     * The {@link setServers} method affects only {@link resolve},`dns.resolve*()` and {@link reverse} (and specifically _not_ {@link lookup}).
     *
     * This method works much like [resolve.conf](https://man7.org/linux/man-pages/man5/resolv.conf.5.html).
     * That is, if attempting to resolve with the first server provided results in a`NOTFOUND` error, the `resolve()` method will _not_ attempt to resolve with
     * subsequent servers provided. Fallback DNS servers will only be used if the
     * earlier ones time out or result in some other error.
     * @since v0.11.3
     * @param servers array of `RFC 5952` formatted addresses
     */
    export function setServers(servers: ReadonlyArray<string>): void;
    /**
     * Returns an array of IP address strings, formatted according to [RFC 5952](https://tools.ietf.org/html/rfc5952#section-6),
     * that are currently configured for DNS resolution. A string will include a port
     * section if a custom port is used.
     *
     * ```js
     * [
     *   '4.4.4.4',
     *   '2001:4860:4860::8888',
     *   '4.4.4.4:1053',
     *   '[2001:4860:4860::8888]:1053',
     * ]
     * ```
     * @since v0.11.3
     */
    export function getServers(): string[];
    /**
     * Set the default value of `verbatim` in {@link lookup} and `dnsPromises.lookup()`. The value could be:
     *
     * * `ipv4first`: sets default `verbatim` `false`.
     * * `verbatim`: sets default `verbatim` `true`.
     *
     * The default is `ipv4first` and {@link setDefaultResultOrder} have higher
     * priority than `--dns-result-order`. When using `worker threads`,{@link setDefaultResultOrder} from the main thread won't affect the default
     * dns orders in workers.
     * @since v16.4.0, v14.18.0
     * @param order must be `'ipv4first'` or `'verbatim'`.
     */
    export function setDefaultResultOrder(order: 'ipv4first' | 'verbatim'): void;
    // Error codes
    export const NODATA: string;
    export const FORMERR: string;
    export const SERVFAIL: string;
    export const NOTFOUND: string;
    export const NOTIMP: string;
    export const REFUSED: string;
    export const BADQUERY: string;
    export const BADNAME: string;
    export const BADFAMILY: string;
    export const BADRESP: string;
    export const CONNREFUSED: string;
    export const TIMEOUT: string;
    export const EOF: string;
    export const FILE: string;
    export const NOMEM: string;
    export const DESTRUCTION: string;
    export const BADSTR: string;
    export const BADFLAGS: string;
    export const NONAME: string;
    export const BADHINTS: string;
    export const NOTINITIALIZED: string;
    export const LOADIPHLPAPI: string;
    export const ADDRGETNETWORKPARAMS: string;
    export const CANCELLED: string;
    export interface ResolverOptions {
        timeout?: number | undefined;
        /**
         * @default 4
         */
        tries?: number;
    }
    /**
     * An independent resolver for DNS requests.
     *
     * Creating a new resolver uses the default server settings. Setting
     * the servers used for a resolver using `resolver.setServers()` does not affect
     * other resolvers:
     *
     * ```js
     * const { Resolver } = require('dns');
     * const resolver = new Resolver();
     * resolver.setServers(['4.4.4.4']);
     *
     * // This request will use the server at 4.4.4.4, independent of global settings.
     * resolver.resolve4('example.org', (err, addresses) => {
     *   // ...
     * });
     * ```
     *
     * The following methods from the `dns` module are available:
     *
     * * `resolver.getServers()`
     * * `resolver.resolve()`
     * * `resolver.resolve4()`
     * * `resolver.resolve6()`
     * * `resolver.resolveAny()`
     * * `resolver.resolveCaa()`
     * * `resolver.resolveCname()`
     * * `resolver.resolveMx()`
     * * `resolver.resolveNaptr()`
     * * `resolver.resolveNs()`
     * * `resolver.resolvePtr()`
     * * `resolver.resolveSoa()`
     * * `resolver.resolveSrv()`
     * * `resolver.resolveTxt()`
     * * `resolver.reverse()`
     * * `resolver.setServers()`
     * @since v8.3.0
     */
    export class Resolver {
        constructor(options?: ResolverOptions);
        /**
         * Cancel all outstanding DNS queries made by this resolver. The corresponding
         * callbacks will be called with an error with code `ECANCELLED`.
         * @since v8.3.0
         */
        cancel(): void;
        getServers: typeof getServers;
        resolve: typeof resolve;
        resolve4: typeof resolve4;
        resolve6: typeof resolve6;
        resolveAny: typeof resolveAny;
        resolveCname: typeof resolveCname;
        resolveMx: typeof resolveMx;
        resolveNaptr: typeof resolveNaptr;
        resolveNs: typeof resolveNs;
        resolvePtr: typeof resolvePtr;
        resolveSoa: typeof resolveSoa;
        resolveSrv: typeof resolveSrv;
        resolveTxt: typeof resolveTxt;
        reverse: typeof reverse;
        /**
         * The resolver instance will send its requests from the specified IP address.
         * This allows programs to specify outbound interfaces when used on multi-homed
         * systems.
         *
         * If a v4 or v6 address is not specified, it is set to the default, and the
         * operating system will choose a local address automatically.
         *
         * The resolver will use the v4 local address when making requests to IPv4 DNS
         * servers, and the v6 local address when making requests to IPv6 DNS servers.
         * The `rrtype` of resolution requests has no impact on the local address used.
         * @since v15.1.0, v14.17.0
         * @param [ipv4='0.0.0.0'] A string representation of an IPv4 address.
         * @param [ipv6='::0'] A string representation of an IPv6 address.
         */
        setLocalAddress(ipv4?: string, ipv6?: string): void;
        setServers: typeof setServers;
    }
    export { dnsPromises as promises };
}
declare module 'node:dns' {
    export * from 'dns';
}