type IPv4 = Uint8Array;
type NSAP = Uint8Array;
/**
 * @summary Encode an IPv4 address as an OSI NSAP address.
 * @description
 *
 * This function encodes an IPv4 address as an OSI NSAP address per the
 * instructions in ITU Recommendation X.519 (2016), Section 11.3.
 *
 * @param {number} type The service type identifier of the endpoint.
 * @param {Uint8Array} ipv4 The IPv4 address of the endpoint.
 * @param {number} port The TCP/UDP port of the endpoint.
 * @returns An encoded OSI NSAP address.
 */
export declare function ipv4ToNSAP(type: number, ipv4: IPv4, port?: number): NSAP;
/**
 * @summary Decode an IPv4 address, port number, and service type from an OSI NSAP address.
 * @description
 *
 * This function decodes an IPv4 address, service type, and possibly a TCP/UDP
 * port number from an OSI NSAP address by reversing the instructions given by
 * ITU Recommendation X.519 (2016), Section 11.3.
 *
 * @param {Uint8Array} nsap The OSI NSAP address to decode into an IPv4 address,
 *  port, and service type.
 * @returns A tuple (array) containing, in this order: the numeric identifier of
 *  the service type of this endpoint, the IPv4 address, and the TCP/UDP port number.
 */
export declare function ipv4FromNSAP(nsap: NSAP): [type: number, ipv4: IPv4, port: number | undefined];
export {};
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