/**
 * This module handles the initial handshake (i.e. authentication
 * and session allocation) on the remote console port. After the
 * handshake completes, `telnet` and `video` would be used.
 */
/** */
/// <reference types="node" />
import { Duplex } from 'stream';
import { RemoteConsoleInfo } from '../rest';
export declare enum ServerStatus {
    HELLO = 80,
    ACCESS_DENIED = 81,
    OK = 82,
    BUSY_1 = 83,
    NO_LICENSE = 87,
    NO_FREE_SESSIONS = 88,
    BUSY_2 = 89
}
/**
 * Negotiates a console / command connection.
 *
 * Returns if correct (afterwards you can start the `telnet`
 * receiver) or throws error.
 *
 * If the server returns busy, the `negotiateBusy` option will be
 * called. It must return a promise resolving to either `'seize'`,
 * `'share'`, or anything else (throws error).
 *
 * Warning: I'm not sure iLO actually validates the key anymore,
 * it returns OK even when the encKey is wrong, then of course
 * decryption yields gibberish and the decoder fails.
 *
 * @param cmd `true` if negotiating a command connection, `false` if negotiating a remote console connection.
 * @param socket recently-opened socket (or duplex stream)
 * @param sessionKey
 * @param rcinfo
 */
export declare function negotiateConnection(cmd: boolean, socket: Duplex, sessionKey: Uint8Array, rcinfo: RemoteConsoleInfo, options?: {
    negotiateBusy?: () => PromiseLike<'share' | 'seize'>;
}): Promise<true | undefined>;
export default negotiateConnection;