xref: /foundation/communication/netstack/interfaces/kits/js/@ohos.net.socket.d.ts

/*
 * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * @file
 * @kit NetworkKit
 */

import type { AsyncCallback, Callback, ErrorCallback } from './@ohos.base';
import connection from "./@ohos.net.connection";
import type cert from './@ohos.security.cert';

/**
 * Provides TCP and UDP Socket APIs.
 * @namespace socket
 * @syscap SystemCapability.Communication.NetStack
 * @since 7
 */
/**
 * Provides TCP and UDP Socket APIs.
 * @namespace socket
 * @syscap SystemCapability.Communication.NetStack
 * @crossplatform
 * @since 10
 */
declare namespace socket {
  export import NetAddress = connection.NetAddress;
  /**
   * Deposit certificate
   * @syscap SystemCapability.Communication.NetStack
   * @since 9
   */
  /**
   * Deposit certificate
   * @typedef { cert.EncodingBlob }
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 10
   */
  export type X509CertRawData = cert.EncodingBlob;

  /**
   * Creates a UDPSocket object.
   * @returns { UDPSocket } the UDPSocket of the constructUDPSocketInstance.
   * @syscap SystemCapability.Communication.NetStack
   * @since 7
   */
  /**
   * Creates a UDPSocket object.
   * @returns { UDPSocket } the UDPSocket of the constructUDPSocketInstance.
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 10
   */
  function constructUDPSocketInstance(): UDPSocket;

  /**
   * Creates a MulticastSocket object.
   * @returns { MulticastSocket } the MulticastSocket of the constructMulticastSocketInstance.
   * @syscap SystemCapability.Communication.NetStack
   * @since 11
   */
  /**
   * Creates a MulticastSocket object.
   * @returns { MulticastSocket } the MulticastSocket of the constructMulticastSocketInstance.
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 12
   */
  function constructMulticastSocketInstance(): MulticastSocket;

  /**
   * Creates a TCPSocket object.
   * @returns { TCPSocket } the TCPSocket of the constructTCPSocketInstance.
   * @syscap SystemCapability.Communication.NetStack
   * @since 7
   */
  /**
   * Creates a TCPSocket object.
   * @returns { TCPSocket } the TCPSocket of the constructTCPSocketInstance.
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 10
   */
  function constructTCPSocketInstance(): TCPSocket;

  /**
   * Creates a TLSSocket object.
   * @returns { TLSSocket } the TLSSocket of the constructTLSSocketInstance.
   * @syscap SystemCapability.Communication.NetStack
   * @since 9
   */
  /**
   * Creates a TLSSocket object.
   * @returns { TLSSocket } the TLSSocket of the constructTLSSocketInstance.
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 10
   */
  function constructTLSSocketInstance(): TLSSocket;

  /**
   * Creates a TLSSocket object with a TCPSocket object.
   * @param { TCPSocket } tcpSocket - Parameter for creating a TLSSocket object.
   * @returns { TLSSocket } the TLSSocket of the constructTLSSocketInstance.
   * @throws { BusinessError } 401 - Parameter error.
   * @throws { BusinessError } 2300002 - System internal error.
   * @throws { BusinessError } 2303601 - Invalid socket FD.
   * @throws { BusinessError } 2303602 - Socket is not connected.
   * @syscap SystemCapability.Communication.NetStack
   * @since 12
   */
  function constructTLSSocketInstance(tcpSocket: TCPSocket): TLSSocket;

  /**
   * Creates a TCPSocketServer object.
   * @returns { TCPSocketServer } the TCPSocketServer of the constructTCPSocketServerInstance.
   * @syscap SystemCapability.Communication.NetStack
   * @since 10
   */
  function constructTCPSocketServerInstance(): TCPSocketServer;

  /**
   * Creates a TLSSocketServer object.
   * @returns { TLSSocketServer } the TLSSocketServer of the constructTLSSocketServerInstance.
   * @syscap SystemCapability.Communication.NetStack
   * @since 10
   */
  function constructTLSSocketServerInstance(): TLSSocketServer;

  /**
   * Creates a LocalSocket object.
   * @returns { LocalSocket } the LocalSocket of the constructLocalSocketInstance.
   * @syscap SystemCapability.Communication.NetStack
   * @since 11
   */
  /**
   * Creates a LocalSocket object.
   * @returns { LocalSocket } the LocalSocket of the constructLocalSocketInstance.
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 12
   */
  function constructLocalSocketInstance(): LocalSocket;

  /**
   * Creates a LocalSocketServer object.
   * @returns { LocalSocketServer } the LocalSocketServer of the constructLocalSocketServerInstance.
   * @syscap SystemCapability.Communication.NetStack
   * @since 11
   */
  /**
   * Creates a LocalSocketServer object.
   * @returns { LocalSocketServer } the LocalSocketServer of the constructLocalSocketServerInstance.
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 12
   */
  function constructLocalSocketServerInstance(): LocalSocketServer;

  /**
   * Defines the parameters for sending data over the UDPSocket connection.
   * @interface UDPSendOptions
   * @syscap SystemCapability.Communication.NetStack
   * @since 7
   */
  /**
   * Defines the parameters for sending data over the UDPSocket connection.
   * @interface UDPSendOptions
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 10
   */
  export interface UDPSendOptions {
    /**
     * Data to send.
     * @type {string | ArrayBuffer}
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Data to send.
     * @type {string | ArrayBuffer}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    data: string | ArrayBuffer;

    /**
     * Destination address.
     * @type {NetAddress}
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Destination address.
     * @type {NetAddress}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    address: NetAddress;
  }

  /**
   * @interface ExtraOptionsBase
   * @syscap SystemCapability.Communication.NetStack
   * @since 7
   */
  /**
   * @interface ExtraOptionsBase
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 10
   */
  export interface ExtraOptionsBase {
    /**
     * Size of the receive buffer, in MBS.
     * @type {?number}
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Size of the receive buffer, in MBS.
     * @type {?number}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    receiveBufferSize?: number;

    /**
     * Size of the send buffer, in MBS.
     * @type {?number}
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Size of the send buffer, in MBS.
     * @type {?number}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    sendBufferSize?: number;

    /**
     * Whether to reuse addresses. The default value is false.
     * @type {?boolean}
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Whether to reuse addresses. The default value is false.
     * @type {?boolean}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    reuseAddress?: boolean;

    /**
     * Timeout duration of the UDPSocket connection, in milliseconds.
     * @type {?number}
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Timeout duration of the UDPSocket connection, in milliseconds.
     * @type {?number}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    socketTimeout?: number;
  }

  /**
   * Defines other properties of the UDPSocket connection.
   * @interface UDPExtraOptions
   * @syscap SystemCapability.Communication.NetStack
   * @since 7
   */
  /**
   * Defines other properties of the UDPSocket connection.
   * @interface UDPExtraOptions
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 10
   */
  export interface UDPExtraOptions extends ExtraOptionsBase {
    /**
     * Whether to send broadcast messages. The default value is false.
     * @type {?boolean}
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Whether to send broadcast messages. The default value is false.
     * @type {?boolean}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    broadcast?: boolean;
  }

  /**
   * Defines the status of the socket connection.
   * @interface SocketStateBase
   * @syscap SystemCapability.Communication.NetStack
   * @since 7
   */
  /**
   * Defines the status of the socket connection.
   * @interface SocketStateBase
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 10
   */
  export interface SocketStateBase {
    /**
     * Whether the connection is in the bound state.
     * @type {boolean}
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Whether the connection is in the bound state.
     * @type {boolean}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    isBound: boolean;

    /**
     * Whether the connection is in the closed state.
     * @type {boolean}
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Whether the connection is in the closed state.
     * @type {boolean}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    isClose: boolean;

    /**
     * Whether the connection is in the connected state.
     * @type {boolean}
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Whether the connection is in the connected state.
     * @type {boolean}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    isConnected: boolean;
  }

  /**
   * Defines information about the socket connection.
   * @interface SocketRemoteInfo
   * @syscap SystemCapability.Communication.NetStack
   * @since 7
   */
  /**
   * Defines information about the socket connection.
   * @interface SocketRemoteInfo
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 10
   */
  export interface SocketRemoteInfo {
    /**
     * Bound IP address.
     * @type {string}
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Bound IP address.
     * @type {string}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    address: string;

    /**
     * Network protocol type. The options are as follows: IPv4, IPv6.
     * @type {'IPv4' | 'IPv6'}
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Network protocol type. The options are as follows: IPv4, IPv6.
     * @type {'IPv4' | 'IPv6'}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    family: 'IPv4' | 'IPv6';

    /**
     * Port number. The value ranges from 0 to 65535.
     * @type {number}
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Port number. The value ranges from 0 to 65535.
     * @type {number}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    port: number;

    /**
     * Length of the server response message, in bytes.
     * @type {number}
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Length of the server response message, in bytes.
     * @type {number}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    size: number;
  }

  /**
   * Defines the local socket connection information.
   * @interface LocalSocketMessageInfo
   * @syscap SystemCapability.Communication.NetStack
   * @since 11
   */
  /**
   * Defines the local socket connection information.
   * @interface LocalSocketMessageInfo
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 12
   */
  export interface LocalSocketMessageInfo {
    /**
     * Message data.
     * @type {ArrayBuffer}
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Message data.
     * @type {ArrayBuffer}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    message: ArrayBuffer;

    /**
     * Bound local socket address.
     * @type {string}
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Bound local socket address.
     * @type {string}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    address: string;

    /**
     * Length of the message, in bytes.
     * @type {number}
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Length of the message, in bytes.
     * @type {number}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    size: number;
  }

  /**
   * Defines a local address.
   * @interface LocalAddress
   * @syscap SystemCapability.Communication.NetStack
   * @since 11
   */
  /**
   * Defines a local address.
   * @interface LocalAddress
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 12
   */
  export interface LocalAddress {
    /**
     * LocalAddress address.
     * @type {string}
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * LocalAddress address.
     * @type {string}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    address: string;
  }

  /**
   * Defines LocalSocket connection parameters.
   * @interface LocalConnectOptions
   * @syscap SystemCapability.Communication.NetStack
   * @since 11
   */
  /**
   * Defines LocalSocket connection parameters.
   * @interface LocalConnectOptions
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 12
   */
  export interface LocalConnectOptions {
    /**
     * Bound Local address.
     * @type {LocalAddress}
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Bound Local address.
     * @type {LocalAddress}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    address: LocalAddress;

    /**
     * Timeout duration of the LocalSocket connection, in milliseconds.
     * @type {?number}
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Timeout duration of the LocalSocket connection, in milliseconds.
     * @type {?number}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    timeout?: number;
  }

  /**
   * Defines the parameters for sending data over the LocalSocket connection.
   * @interface LocalSendOptions
   * @syscap SystemCapability.Communication.NetStack
   * @since 11
   */
  /**
   * Defines the parameters for sending data over the LocalSocket connection.
   * @interface LocalSendOptions
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 12
   */
  export interface LocalSendOptions {
    /**
     * Data to send.
     * @type {string | ArrayBuffer}
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Data to send.
     * @type {string | ArrayBuffer}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    data: string | ArrayBuffer;

    /**
     * Character encoding format.
     * @type {?string}
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Character encoding format.
     * @type {?string}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    encoding?: string;
  }

  /**
   * Defines a UDPSocket connection.
   * @interface UDPSocket
   * @syscap SystemCapability.Communication.NetStack
   * @since 7
   */
  /**
   * Defines a UDPSocket connection.
   * @interface UDPSocket
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 10
   */
  export interface UDPSocket {
    /**
     * Binds the IP address and port number. The port number can be specified or randomly allocated by the system.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } address - Destination address. {@link NetAddress}
     * @param { AsyncCallback<void> } callback - the callback of bind.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Binds the IP address and port number. The port number can be specified or randomly allocated by the system.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } address - Destination address. {@link NetAddress}
     * @param { AsyncCallback<void> } callback - the callback of bind.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    bind(address: NetAddress, callback: AsyncCallback<void>): void;

    /**
     * Binds the IP address and port number. The port number can be specified or randomly allocated by the system.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } address - Destination address. {@link NetAddress}
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Binds the IP address and port number. The port number can be specified or randomly allocated by the system.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } address - Destination address. {@link NetAddress}
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    bind(address: NetAddress): Promise<void>;

    /**
     * Obtains the local address of a UDPSocket connection.
     * @returns { Promise<NetAddress> } The promise returned by the function.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 12
     */
    getLocalAddress(): Promise<NetAddress>;

    /**
     * Sends data over a UDPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { UDPSendOptions } options - Optional parameters {@link UDPSendOptions}.
     * @param { AsyncCallback<void> } callback - the callback of send.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Sends data over a UDPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { UDPSendOptions } options - Optional parameters {@link UDPSendOptions}.
     * @param { AsyncCallback<void> } callback - the callback of send.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    send(options: UDPSendOptions, callback: AsyncCallback<void>): void;

    /**
     * Sends data over a UDPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { UDPSendOptions } options - Optional parameters {@link UDPSendOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Sends data over a UDPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { UDPSendOptions } options - Optional parameters {@link UDPSendOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    send(options: UDPSendOptions): Promise<void>;

    /**
     * Closes a UDPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { AsyncCallback<void> } callback - the callback of close.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Closes a UDPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { AsyncCallback<void> } callback - the callback of close.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    close(callback: AsyncCallback<void>): void;

    /**
     * Closes a UDPSocket connection.
     * @permission ohos.permission.INTERNET
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Closes a UDPSocket connection.
     * @permission ohos.permission.INTERNET
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    close(): Promise<void>;

    /**
     * Obtains the status of the UDPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { AsyncCallback<SocketStateBase> } callback - the callback of getState. {@link SocketStateBase}.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Obtains the status of the UDPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { AsyncCallback<SocketStateBase> } callback - the callback of getState. {@link SocketStateBase}.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getState(callback: AsyncCallback<SocketStateBase>): void;

    /**
     * Obtains the status of the UDPSocket connection.
     * @permission ohos.permission.INTERNET
     * @returns { Promise<SocketStateBase> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Obtains the status of the UDPSocket connection.
     * @permission ohos.permission.INTERNET
     * @returns { Promise<SocketStateBase> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getState(): Promise<SocketStateBase>;

    /**
     * Sets other attributes of the UDPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { UDPExtraOptions } options - Optional parameters {@link UDPExtraOptions}.
     * @param { AsyncCallback<void> }callback - the callback of setExtraOptions.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Sets other attributes of the UDPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { UDPExtraOptions } options - Optional parameters {@link UDPExtraOptions}.
     * @param { AsyncCallback<void> }callback - the callback of setExtraOptions.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    setExtraOptions(options: UDPExtraOptions, callback: AsyncCallback<void>): void;

    /**
     * Sets other attributes of the UDPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { UDPExtraOptions } options - Optional parameters {@link UDPExtraOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Sets other attributes of the UDPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { UDPExtraOptions } options - Optional parameters {@link UDPExtraOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    setExtraOptions(options: UDPExtraOptions): Promise<void>;

    /**
     * Listens for message receiving events of the UDPSocket connection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<{ message: ArrayBuffer, remoteInfo: SocketRemoteInfo }> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Listens for message receiving events of the UDPSocket connection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<{ message: ArrayBuffer, remoteInfo: SocketRemoteInfo }> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    /**
     * Listens for message receiving events of the UDPSocket connection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<SocketMessageInfo> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 11
     */
    on(type: 'message', callback: Callback<SocketMessageInfo>): void;

    /**
     * Cancels listening for message receiving events of the UDPSocket connection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<{ message: ArrayBuffer, remoteInfo: SocketRemoteInfo }> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Cancels listening for message receiving events of the UDPSocket connection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<{ message: ArrayBuffer, remoteInfo: SocketRemoteInfo }> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    /**
     * Cancels listening for message receiving events of the UDPSocket connection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<SocketMessageInfo> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 11
     */
    off(type: 'message', callback?: Callback<SocketMessageInfo>): void;

    /**
     * Listens for data packet message events or close events of the UDPSocket connection.
     * @param { 'listening' | 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Listens for data packet message events or close events of the UDPSocket connection.
     * @param { 'listening' | 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    on(type: 'listening' | 'close', callback: Callback<void>): void;

    /**
     * Cancels listening for data packet message events or close events of the UDPSocket connection.
     * @param { 'listening' | 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Cancels listening for data packet message events or close events of the UDPSocket connection.
     * @param { 'listening' | 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    off(type: 'listening' | 'close', callback?: Callback<void>): void;

    /**
     * Listens for error events of the UDPSocket connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Listens for error events of the UDPSocket connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    on(type: 'error', callback: ErrorCallback): void;

    /**
     * Cancels listening for error events of the UDPSocket connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Cancels listening for error events of the UDPSocket connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    off(type: 'error', callback?: ErrorCallback): void;
  }

  /**
   * Defines a UDP MulticastSocket connection.
   * @interface MulticastSocket
   * @syscap SystemCapability.Communication.NetStack
   * @since 11
   */
  /**
   * Defines a UDP MulticastSocket connection.
   * @interface MulticastSocket
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 12
   */
  export interface MulticastSocket extends UDPSocket {
    /**
     * Add the socket to the multicast group.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } multicastAddress - Multicast address information. {@link NetAddress}.
     * @param { AsyncCallback<void> } callback - The callback of addMembership.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301022 - Invalid argument.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @throws { BusinessError } 2301098 - Address in use.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Add the socket to the multicast group.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } multicastAddress - Multicast address information. {@link NetAddress}.
     * @param { AsyncCallback<void> } callback - The callback of addMembership.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301022 - Invalid argument.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @throws { BusinessError } 2301098 - Address in use.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    addMembership(multicastAddress: NetAddress, callback: AsyncCallback<void>): void;

    /**
     * Add the socket to the multicast group.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } multicastAddress - Multicast address information. {@link NetAddress}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @throws { BusinessError } 2301098 - Address in use.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Add the socket to the multicast group.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } multicastAddress - Multicast address information. {@link NetAddress}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @throws { BusinessError } 2301098 - Address in use.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    addMembership(multicastAddress: NetAddress): Promise<void>;

    /**
     * Drop the socket from the multicast group.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } multicastAddress - Multicast address information. {@link NetAddress}.
     * @param { AsyncCallback<void> } callback - The callback of dropMembership.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @throws { BusinessError } 2301098 - Address in use.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Drop the socket from the multicast group.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } multicastAddress - Multicast address information. {@link NetAddress}.
     * @param { AsyncCallback<void> } callback - The callback of dropMembership.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @throws { BusinessError } 2301098 - Address in use.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    dropMembership(multicastAddress: NetAddress, callback: AsyncCallback<void>): void;

    /**
     * Drop the socket from the multicast group.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } multicastAddress - Multicast address information. {@link NetAddress}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @throws { BusinessError } 2301098 - Address in use.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Drop the socket from the multicast group.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } multicastAddress - Multicast address information. {@link NetAddress}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @throws { BusinessError } 2301098 - Address in use.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    dropMembership(multicastAddress: NetAddress): Promise<void>;

    /**
     * Set the TTL value for socket multicast packets.
     * @param { number } ttl - The TTL value to set. Valid range is typically 0 to 255.
     * @param { AsyncCallback<void> } callback - The callback of setMulticastTTL.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301022 - Invalid argument.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Set the TTL value for socket multicast packets.
     * @param { number } ttl - The TTL value to set. Valid range is typically 0 to 255.
     * @param { AsyncCallback<void> } callback - The callback of setMulticastTTL.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301022 - Invalid argument.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    setMulticastTTL(ttl: number, callback: AsyncCallback<void>): void;

    /**
     * Set the TTL value for socket multicast packet.
     * @param { number } ttl - The TTL value to set. Valid range is typically 0 to 255.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301022 - Invalid argument.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Set the TTL value for socket multicast packet.
     * @param { number } ttl - The TTL value to set. Valid range is typically 0 to 255.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301022 - Invalid argument.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    setMulticastTTL(ttl: number): Promise<void>;

    /**
     * Get the TTL value of socket multicast packet.
     * @param { AsyncCallback<number> } callback - The callback of getMulticastTTL.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Get the TTL value of socket multicast packet.
     * @param { AsyncCallback<number> } callback - The callback of getMulticastTTL.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    getMulticastTTL(callback: AsyncCallback<number>): void;

    /**
     * Get the TTL value of socket multicast packet.
     * @returns { Promise<number> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Get the TTL value of socket multicast packet.
     * @returns { Promise<number> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    getMulticastTTL(): Promise<number>;

    /**
     * Set the loopback mode for the socket.
     * @param { boolean } flag - Whether to enable loopback mode.
     * @param { AsyncCallback<void> } callback - The callback of setLoopbackMode.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Set the loopback mode for the socket.
     * @param { boolean } flag - Whether to enable loopback mode.
     * @param { AsyncCallback<void> } callback - The callback of setLoopbackMode.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    setLoopbackMode(flag: boolean, callback: AsyncCallback<void>): void;

    /**
     * Set the loopback mode for the socket.
     * @param { boolean } flag - Whether to enable loopback mode.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Set the loopback mode for the socket.
     * @param { boolean } flag - Whether to enable loopback mode.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    setLoopbackMode(flag: boolean): Promise<void>;

    /**
     * Get the loopback mode of the socket.
     * @param { AsyncCallback<boolean> } callback - The callback of getLoopbackMode.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Get the loopback mode of the socket.
     * @param { AsyncCallback<boolean> } callback - The callback of getLoopbackMode.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    getLoopbackMode(callback: AsyncCallback<boolean>): void;

    /**
     * Get the loopback mode of the socket.
     * @returns { Promise<boolean> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Get the loopback mode of the socket.
     * @returns { Promise<boolean> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301088 - Not a socket.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    getLoopbackMode(): Promise<boolean>;
  }

  /**
   * Defines a LocalSocket connection.
   * @interface LocalSocket
   * @syscap SystemCapability.Communication.NetStack
   * @since 11
   */
  /**
   * Defines a LocalSocket connection.
   * @interface LocalSocket
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 12
   */
  export interface LocalSocket {
    /**
     * Binds the Local address.
     * @param { LocalAddress } address - Destination address. {@link LocalAddress}
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301013 - Insufficient permissions.
     * @throws { BusinessError } 2301022 - Invalid argument.
     * @throws { BusinessError } 2301098 - Address already in use.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Binds the Local address.
     * @param { LocalAddress } address - Destination address. {@link LocalAddress}
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301013 - Insufficient permissions.
     * @throws { BusinessError } 2301022 - Invalid argument.
     * @throws { BusinessError } 2301098 - Address already in use.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    bind(address: LocalAddress): Promise<void>;

    /**
     * Sets up a connection to the specified Local address .
     * @param { LocalConnectOptions } options - Optional parameters {@link LocalConnectOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301013 - Insufficient permissions.
     * @throws { BusinessError } 2301022 - Invalid argument.
     * @throws { BusinessError } 2301111 - Connection refused.
     * @throws { BusinessError } 2301099 - Cannot assign requested address.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Sets up a connection to the specified Local address .
     * @param { LocalConnectOptions } options - Optional parameters {@link LocalConnectOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301013 - Insufficient permissions.
     * @throws { BusinessError } 2301022 - Invalid argument.
     * @throws { BusinessError } 2301111 - Connection refused.
     * @throws { BusinessError } 2301099 - Cannot assign requested address.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    connect(options: LocalConnectOptions): Promise<void>;

    /**
     * Sends data over a LocalSocket connection.
     * @param { LocalSendOptions } options - Optional parameters {@link LocalSendOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301011 - Operation would block.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Sends data over a LocalSocket connection.
     * @param { LocalSendOptions } options - Optional parameters {@link LocalSendOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301011 - Operation would block.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    send(options: LocalSendOptions): Promise<void>;

    /**
     * Closes a LocalSocket connection.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Closes a LocalSocket connection.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    close(): Promise<void>;

    /**
     * Obtains the status of the LocalSocket connection.
     * @returns { Promise<SocketStateBase> } The promise returned by the function.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Obtains the status of the LocalSocket connection.
     * @returns { Promise<SocketStateBase> } The promise returned by the function.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    getState(): Promise<SocketStateBase>;

    /**
     * Obtains the file descriptor of the LocalSocket connection.
     * @returns { Promise<number> } The promise returns the file descriptor of the LocalSocket connection.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Obtains the file descriptor of the LocalSocket connection.
     * @returns { Promise<number> } The promise returns the file descriptor of the LocalSocket connection.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    getSocketFd(): Promise<number>;

    /**
     * Sets other attributes of the LocalSocket connection.
     * @param { ExtraOptionsBase } options - Optional parameters {@link ExtraOptionsBase}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Sets other attributes of the LocalSocket connection.
     * @param { ExtraOptionsBase } options - Optional parameters {@link ExtraOptionsBase}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    setExtraOptions(options: ExtraOptionsBase): Promise<void>;

    /**
     * Gets other attributes of the LocalSocket connection.
     * @returns { Promise<ExtraOptionsBase> } The promise returned by the function.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Gets other attributes of the LocalSocket connection.
     * @returns { Promise<ExtraOptionsBase> } The promise returned by the function.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    getExtraOptions(): Promise<ExtraOptionsBase>;

    /**
     * Obtains the local address of a LocalSocket connection.
     * @returns { Promise<string> } The promise returned by the function.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 12
     */
    getLocalAddress(): Promise<string>;

    /**
     * Listens for message receiving events of the LocalSocket connection.
     * @param { 'message' } type Indicates Event name.
     * @param { Callback<LocalSocketMessageInfo> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Listens for message receiving events of the LocalSocket connection.
     * @param { 'message' } type Indicates Event name.
     * @param { Callback<LocalSocketMessageInfo> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    on(type: 'message', callback: Callback<LocalSocketMessageInfo>): void;

    /**
     * Cancels listening for message receiving events of the LocalSocket connection.
     * @param { 'message' } type Indicates Event name.
     * @param { Callback<LocalSocketMessageInfo> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Cancels listening for message receiving events of the LocalSocket connection.
     * @param { 'message' } type Indicates Event name.
     * @param { Callback<LocalSocketMessageInfo> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    off(type: 'message', callback?: Callback<LocalSocketMessageInfo>): void;

    /**
     * Listens for connection events of the LocalSocket connection.
     * @param { 'connect' } type - Indicates Event name.
     * @param { Callback<void> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Listens for connection events of the LocalSocket connection.
     * @param { 'connect' } type - Indicates Event name.
     * @param { Callback<void> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    on(type: 'connect', callback: Callback<void>): void;

    /**
     * Cancels listening for connection events of the LocalSocket connection.
     * @param { 'connect' } type - Indicates Event name.
     * @param { Callback<void> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Cancels listening for connection events of the LocalSocket connection.
     * @param { 'connect' } type - Indicates Event name.
     * @param { Callback<void> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    off(type: 'connect', callback?: Callback<void>): void;

    /**
     * Listens for close events of the LocalSocket connection.
     * @param { 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Listens for close events of the LocalSocket connection.
     * @param { 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    on(type: 'close', callback: Callback<void>): void;

    /**
     * Cancels listening for close events of the LocalSocket connection.
     * @param { 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Cancels listening for close events of the LocalSocket connection.
     * @param { 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    off(type: 'close', callback?: Callback<void>): void;

    /**
     * Listens for error events of the LocalSocket connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Listens for error events of the LocalSocket connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    on(type: 'error', callback: ErrorCallback): void;

    /**
     * Cancels listening for error events of the LocalSocket connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Cancels listening for error events of the LocalSocket connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    off(type: 'error', callback?: ErrorCallback): void;
  }

  /**
   * Defines the connection of the LocalSocket client and server.
   * @interface LocalSocketConnection
   * @syscap SystemCapability.Communication.NetStack
   * @since 11
   */
  /**
   * Defines the connection of the LocalSocket client and server.
   * @interface LocalSocketConnection
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 12
   */
  export interface LocalSocketConnection {
    /**
     * The id of a client connects to the LocalSocketServer.
     * @type {number}
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * The id of a client connects to the LocalSocketServer.
     * @type {number}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    clientId: number;

    /**
     * Sends data over a LocalSocketServer connection to client.
     * @param { LocalSendOptions } options - Parameters for sending data {@link LocalSendOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301011 - Operation would block.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Sends data over a LocalSocketServer connection to client.
     * @param { LocalSendOptions } options - Parameters for sending data {@link LocalSendOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301011 - Operation would block.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    send(options: LocalSendOptions): Promise<void>;

    /**
     * Closes a LocalSocket client connection.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Closes a LocalSocket client connection.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    close(): Promise<void>;

    /**
     * Obtains the local address of a LocalSocket client connection.
     * @returns { Promise<string> } The promise returned by the function.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 12
     */
    getLocalAddress(): Promise<string>;

    /**
     * Listens for message receiving events of the LocalSocketConnection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<LocalSocketMessageInfo> } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Listens for message receiving events of the LocalSocketConnection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<LocalSocketMessageInfo> } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    on(type: 'message', callback: Callback<LocalSocketMessageInfo>): void;

    /**
     * Cancels listening for message receiving events of the LocalSocketConnection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<LocalSocketMessageInfo> } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Cancels listening for message receiving events of the LocalSocketConnection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<LocalSocketMessageInfo> } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    off(type: 'message', callback?: Callback<LocalSocketMessageInfo>): void;

    /**
     * Listens for close events of the LocalSocketConnection.
     * @param { 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Listens for close events of the LocalSocketConnection.
     * @param { 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    on(type: 'close', callback: Callback<void>): void;

    /**
     * Cancels listening for close events of the LocalSocketConnection.
     * @param { 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Cancels listening for close events of the LocalSocketConnection.
     * @param { 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    off(type: 'close', callback?: Callback<void>): void;

    /**
     * Listens for error events of the LocalSocketConnection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Listens for error events of the LocalSocketConnection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    on(type: 'error', callback: ErrorCallback): void;

    /**
     * Cancels listening for error events of the LocalSocketConnection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Cancels listening for error events of the LocalSocketConnection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    off(type: 'error', callback?: ErrorCallback): void;
  }

  /**
   * Defines a LocalSocket server connection.
   * @interface LocalSocketServer
   * @syscap SystemCapability.Communication.NetStack
   * @since 11
   */
  /**
   * Defines a LocalSocket server connection.
   * @interface LocalSocketServer
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 12
   */
  export interface LocalSocketServer {
    /**
     * Binds the Local address.
     * <p>Listens for a LocalSocket connection to be made to this socket and accepts it. This interface uses multiple threads
     * for accept processing and uses poll multiplex to process client connections.</p>
     * @param { LocalAddress } address - Network address information {@link LocalAddress}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303109 - Bad file number.
     * @throws { BusinessError } 2301013 - Insufficient permissions.
     * @throws { BusinessError } 2301022 - Invalid argument.
     * @throws { BusinessError } 2301098 - Address already in use.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Binds the Local address.
     * <p>Listens for a LocalSocket connection to be made to this socket and accepts it. This interface uses multiple threads
     * for accept processing and uses poll multiplex to process client connections.</p>
     * @param { LocalAddress } address - Network address information {@link LocalAddress}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303109 - Bad file number.
     * @throws { BusinessError } 2301013 - Insufficient permissions.
     * @throws { BusinessError } 2301022 - Invalid argument.
     * @throws { BusinessError } 2301098 - Address already in use.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    listen(address: LocalAddress): Promise<void>;

    /**
     * Obtains the status of the LocalSocketServer connection.
     * @returns { Promise<SocketStateBase> } The promise returned by the function.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Obtains the status of the LocalSocketServer connection.
     * @returns { Promise<SocketStateBase> } The promise returned by the function.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    getState(): Promise<SocketStateBase>;

    /**
     * Sets other attributes of the LocalSocketServer connection.
     * @param { ExtraOptionsBase } options - Parameters of the attributes {@link ExtraOptionsBase}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Sets other attributes of the LocalSocketServer connection.
     * @param { ExtraOptionsBase } options - Parameters of the attributes {@link ExtraOptionsBase}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    setExtraOptions(options: ExtraOptionsBase): Promise<void>;

    /**
     * Gets other attributes of the LocalSocket connection.
     * @returns { Promise<ExtraOptionsBase> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Gets other attributes of the LocalSocket connection.
     * @returns { Promise<ExtraOptionsBase> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    getExtraOptions(): Promise<ExtraOptionsBase>;

    /**
     * Obtains the local address of the LocalSocketServer connection.
     * @returns { Promise<string> } The promise returned by the function.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 12
     */
    getLocalAddress(): Promise<string>;

    /**
     * Listens for connect events of the LocalSocketServer connection.
     * @param { 'connect' } type - Indicates Event name.
     * @param { Callback<LocalSocketConnection> } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Listens for connect events of the LocalSocketServer connection.
     * @param { 'connect' } type - Indicates Event name.
     * @param { Callback<LocalSocketConnection> } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    on(type: 'connect', callback: Callback<LocalSocketConnection>): void;

    /**
     * Cancels listening for connect events of the LocalSocketServer connection.
     * @param { 'connect' } type - Indicates Event name.
     * @param { Callback<LocalSocketConnection> } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Cancels listening for connect events of the LocalSocketServer connection.
     * @param { 'connect' } type - Indicates Event name.
     * @param { Callback<LocalSocketConnection> } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    off(type: 'connect', callback?: Callback<LocalSocketConnection>): void;

    /**
     * Listens for error events of the LocalSocketServer connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Listens for error events of the LocalSocketServer connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    on(type: 'error', callback: ErrorCallback): void;

    /**
     * Cancels listening for error events of the LocalSocketServer connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Cancels listening for error events of the LocalSocketServer connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    off(type: 'error', callback?: ErrorCallback): void;
  }

  /**
   * Defines TCPSocket connection parameters.
   * @interface TCPConnectOptions
   * @syscap SystemCapability.Communication.NetStack
   * @since 7
   */
  /**
   * Defines TCPSocket connection parameters.
   * @interface TCPConnectOptions
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 10
   */
  export interface TCPConnectOptions {
    /**
     * Bound IP address and port number.
     * @type { NetAddress }
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Bound IP address and port number.
     * @type { NetAddress }
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    address: NetAddress;

    /**
     * Timeout duration of the TCPSocket connection, in milliseconds.
     * @type { ?number }
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Timeout duration of the TCPSocket connection, in milliseconds.
     * @type { ?number }
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    timeout?: number;
  }

  /**
   * Defines the parameters for sending data over the TCPSocket connection.
   * @interface TCPSendOptions
   * @syscap SystemCapability.Communication.NetStack
   * @since 7
   */
  /**
   * Defines the parameters for sending data over the TCPSocket connection.
   * @interface TCPSendOptions
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 10
   */
  export interface TCPSendOptions {
    /**
     * Data to send.
     * @type { string | ArrayBuffer }
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Data to send.
     * @type { string | ArrayBuffer }
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    data: string | ArrayBuffer;

    /**
     * Character encoding format.
     * @type { ?string }
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Character encoding format.
     * @type { ?string }
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    encoding?: string;
  }

  /**
   * Defines other properties of the TCPSocket connection.
   * @interface TCPExtraOptions
   * @syscap SystemCapability.Communication.NetStack
   * @since 7
   */
  /**
   * Defines other properties of the TCPSocket connection.
   * @interface TCPExtraOptions
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 10
   */
  export interface TCPExtraOptions extends ExtraOptionsBase {
    /**
     * Whether to keep the connection alive. The default value is false.
     * @type { ?boolean }
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Whether to keep the connection alive. The default value is false.
     * @type { ?boolean }
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    keepAlive?: boolean;

    /**
     * Whether to enable OOBInline. The default value is false.
     * @type { ?boolean }
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Whether to enable OOBInline. The default value is false.
     * @type { ?boolean }
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    OOBInline?: boolean;

    /**
     * Whether to enable no-delay on the TCPSocket connection. The default value is false.
     * @type { ?boolean }
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Whether to enable no-delay on the TCPSocket connection. The default value is false.
     * @type { ?boolean }
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    TCPNoDelay?: boolean;

    /**
     * Socket linger.
     * @type { ?object }
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 7
     */
    /**
     * Socket linger.
     * @type { ?object }
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    socketLinger?: { on: boolean, linger: number };
  }

  /**
   * Defines a TCPSocket connection.
   * @interface TCPSocket
   * @syscap SystemCapability.Communication.NetStack
   * @since 7
   */
  /**
   * Defines a TCPSocket connection.
   * @interface TCPSocket
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 10
   */
  export interface TCPSocket {
    /**
     * Binds the IP address and port number. The port number can be specified or randomly allocated by the system.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } address - Destination address. {@link NetAddress}
     * @param { AsyncCallback<void> } callback - Return the callback of bind.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Binds the IP address and port number. The port number can be specified or randomly allocated by the system.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } address - Destination address. {@link NetAddress}
     * @param { AsyncCallback<void> } callback - the callback of bind.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    bind(address: NetAddress, callback: AsyncCallback<void>): void;

    /**
     * Binds the IP address and port number. The port number can be specified or randomly allocated by the system.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } address - Destination address. {@link NetAddress}
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Binds the IP address and port number. The port number can be specified or randomly allocated by the system.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } address - Destination address. {@link NetAddress}
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    bind(address: NetAddress): Promise<void>;

    /**
     * Sets up a connection to the specified IP address and port number.
     * @permission ohos.permission.INTERNET
     * @param { TCPConnectOptions } options - Optional parameters {@link TCPConnectOptions}.
     * @param { AsyncCallback<void> } callback - the callback of connect.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Sets up a connection to the specified IP address and port number.
     * @permission ohos.permission.INTERNET
     * @param { TCPConnectOptions } options - Optional parameters {@link TCPConnectOptions}.
     * @param { AsyncCallback<void> } callback - the callback of connect.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    connect(options: TCPConnectOptions, callback: AsyncCallback<void>): void;

    /**
     * Sets up a connection to the specified IP address and port number.
     * @permission ohos.permission.INTERNET
     * @param { TCPConnectOptions } options - Optional parameters {@link TCPConnectOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Sets up a connection to the specified IP address and port number.
     * @permission ohos.permission.INTERNET
     * @param { TCPConnectOptions } options - Optional parameters {@link TCPConnectOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    connect(options: TCPConnectOptions): Promise<void>;

    /**
     * Sends data over a TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { TCPSendOptions } options - Optional parameters {@link TCPSendOptions}.
     * @param { AsyncCallback<void> } callback - the callback of send.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Sends data over a TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { TCPSendOptions } options - Optional parameters {@link TCPSendOptions}.
     * @param { AsyncCallback<void> } callback - the callback of send.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    send(options: TCPSendOptions, callback: AsyncCallback<void>): void;

    /**
     * Sends data over a TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { TCPSendOptions } options - Optional parameters {@link TCPSendOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Sends data over a TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { TCPSendOptions } options - Optional parameters {@link TCPSendOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    send(options: TCPSendOptions): Promise<void>;

    /**
     * Closes a TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { AsyncCallback<void> } callback - the callback of close.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Closes a TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { AsyncCallback<void> } callback - the callback of close.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    close(callback: AsyncCallback<void>): void;

    /**
     * Closes a TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Closes a TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    close(): Promise<void>;

    /**
     * Obtains the peer address of a TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { AsyncCallback<NetAddress> } callback - the callback of getRemoteAddress. {@link NetAddress}
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Obtains the peer address of a TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { AsyncCallback<NetAddress> } callback - the callback of getRemoteAddress. {@link NetAddress}
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getRemoteAddress(callback: AsyncCallback<NetAddress>): void;

    /**
     * Obtains the peer address of a TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @returns { Promise<NetAddress> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Obtains the peer address of a TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @returns { Promise<NetAddress> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getRemoteAddress(): Promise<NetAddress>;

    /**
     * Obtains the status of the TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { AsyncCallback<SocketStateBase> } callback - the callback of getState. {@link SocketStateBase}
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Obtains the status of the TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { AsyncCallback<SocketStateBase> } callback - the callback of getState. {@link SocketStateBase}
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getState(callback: AsyncCallback<SocketStateBase>): void;

    /**
     * Obtains the status of the TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @returns { Promise<SocketStateBase> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Obtains the status of the TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @returns { Promise<SocketStateBase> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getState(): Promise<SocketStateBase>;

    /**
     * Obtains the file descriptor of the TCPSocket connection.
     * @param { AsyncCallback<number> } callback - The callback returns the file descriptor of the TCPSocket connection.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getSocketFd(callback: AsyncCallback<number>): void;

    /**
     * Obtains the file descriptor of the TCPSocket connection.
     * @returns { Promise<number> } The promise returns the file descriptor of the TCPSocket connection.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getSocketFd(): Promise<number>;

    /**
     * Sets other attributes of the TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { TCPExtraOptions } options - Optional parameters {@link TCPExtraOptions}.
     * @param { AsyncCallback<void> } callback - the callback of setExtraOptions.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Sets other attributes of the TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { TCPExtraOptions } options - Optional parameters {@link TCPExtraOptions}.
     * @param { AsyncCallback<void> } callback - the callback of setExtraOptions.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    setExtraOptions(options: TCPExtraOptions, callback: AsyncCallback<void>): void;

    /**
     * Sets other attributes of the TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { TCPExtraOptions } options - Optional parameters {@link TCPExtraOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Sets other attributes of the TCPSocket connection.
     * @permission ohos.permission.INTERNET
     * @param { TCPExtraOptions } options - Optional parameters {@link TCPExtraOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    setExtraOptions(options: TCPExtraOptions): Promise<void>;

    /**
     * Obtains the local address of a TCPSocket connection.
     * @returns { Promise<NetAddress> } The promise returned by the function.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 12
     */
    getLocalAddress(): Promise<NetAddress>;

    /**
     * Listens for message receiving events of the TCPSocket connection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<{ message: ArrayBuffer, remoteInfo: SocketRemoteInfo }> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Listens for message receiving events of the TCPSocket connection.
     * @param { 'message' } type Indicates Event name.
     * @param { Callback<{ message: ArrayBuffer, remoteInfo: SocketRemoteInfo }> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    /**
     * Listens for message receiving events of the TCPSocket connection.
     * @param { 'message' } type Indicates Event name.
     * @param { Callback<SocketMessageInfo> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 11
     */
    on(type: 'message', callback: Callback<SocketMessageInfo>): void;

    /**
     * Cancels listening for message receiving events of the TCPSocket connection.
     * @param { 'message' } type Indicates Event name.
     * @param { Callback<{ message: ArrayBuffer, remoteInfo: SocketRemoteInfo }> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Cancels listening for message receiving events of the TCPSocket connection.
     * @param { 'message' } type Indicates Event name.
     * @param { Callback<{ message: ArrayBuffer, remoteInfo: SocketRemoteInfo }> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    /**
     * Cancels listening for message receiving events of the TCPSocket connection.
     * @param { 'message' } type Indicates Event name.
     * @param { Callback<SocketMessageInfo> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 11
     */
    off(type: 'message', callback?: Callback<SocketMessageInfo>): void;


    /**
     * Listens for connection or close events of the TCPSocket connection.
     * @param { 'connect' | 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Listens for connection or close events of the TCPSocket connection.
     * @param { 'connect' | 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    on(type: 'connect' | 'close', callback: Callback<void>): void;

    /**
     * Cancels listening for connection or close events of the TCPSocket connection.
     * @param { 'connect' | 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Cancels listening for connection or close events of the TCPSocket connection.
     * @param { 'connect' | 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    off(type: 'connect' | 'close', callback?: Callback<void>): void;

    /**
     * Listens for error events of the TCPSocket connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Listens for error events of the TCPSocket connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    on(type: 'error', callback: ErrorCallback): void;

    /**
     * Cancels listening for error events of the TCPSocket connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @since 7
     */
    /**
     * Cancels listening for error events of the TCPSocket connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - the callback used to return the result.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    off(type: 'error', callback?: ErrorCallback): void;
  }

  /**
   * Defines a TLSSocket connection.
   * @interface TLSSocket
   * @syscap SystemCapability.Communication.NetStack
   * @since 9
   */
  /**
   * Defines a TLSSocket connection.
   * @interface TLSSocket
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 10
   */
  export interface TLSSocket {
    /**
     * Binds the IP address and port number. The port number can be specified or randomly allocated by the system.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } address - Destination address. {@link NetAddress}
     * @param { AsyncCallback<void> } callback - the callback of bind.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 2303198 - Address already in use.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Binds the IP address and port number. The port number can be specified or randomly allocated by the system.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } address - Destination address. {@link NetAddress}
     * @param { AsyncCallback<void> } callback - the callback of bind.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 2303198 - Address already in use.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    bind(address: NetAddress, callback: AsyncCallback<void>): void;

    /**
     * Binds the IP address and port number. The port number can be specified or randomly allocated by the system.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } address - Destination address. {@link NetAddress}
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 2303198 - Address already in use.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Binds the IP address and port number. The port number can be specified or randomly allocated by the system.
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } address - Destination address. {@link NetAddress}
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 2303198 - Address already in use.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    bind(address: NetAddress): Promise<void>;

    /**
     * Obtains the peer address of a TLSSocket connection.
     * @param { AsyncCallback<NetAddress> } callback - the callback of getRemoteAddress.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Obtains the peer address of a TLSSocket connection.
     * @param { AsyncCallback<NetAddress> } callback - the callback of getRemoteAddress.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getRemoteAddress(callback: AsyncCallback<NetAddress>): void;

    /**
     * Obtains the peer address of a TLSSocket connection.
     * @returns { Promise<NetAddress> } The promise returned by the function.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Obtains the peer address of a TLSSocket connection.
     * @returns { Promise<NetAddress> } The promise returned by the function.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getRemoteAddress(): Promise<NetAddress>;

    /**
     * Obtains the status of the TLSSocket connection.
     * @param { AsyncCallback<SocketStateBase> } callback - the callback of getState.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Obtains the status of the TLSSocket connection.
     * @param { AsyncCallback<SocketStateBase> } callback - the callback of getState.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getState(callback: AsyncCallback<SocketStateBase>): void;

    /**
     * Obtains the status of the TLSSocket connection.
     * @returns { Promise<SocketStateBase> } The promise returned by the function.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Obtains the status of the TLSSocket connection.
     * @returns { Promise<SocketStateBase> } The promise returned by the function.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getState(): Promise<SocketStateBase>;

    /**
     * Sets other attributes of the TLSSocket connection.
     * @param { TCPExtraOptions } options - Optional parameters {@link TCPExtraOptions}.
     * @param { AsyncCallback<void> } callback - the callback of setExtraOptions.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Sets other attributes of the TLSSocket connection.
     * @param { TCPExtraOptions } options - Optional parameters {@link TCPExtraOptions}.
     * @param { AsyncCallback<void> } callback - the callback of setExtraOptions.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    setExtraOptions(options: TCPExtraOptions, callback: AsyncCallback<void>): void;

    /**
     * Sets other attributes of the TLSSocket connection.
     * @param { TCPExtraOptions } options - Optional parameters {@link TCPExtraOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Sets other attributes of the TLSSocket connection.
     * @param { TCPExtraOptions } options - Optional parameters {@link TCPExtraOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    setExtraOptions(options: TCPExtraOptions): Promise<void>;

    /**
     * Obtains the local address of a TLSSocket connection.
     * @returns { Promise<NetAddress> } The promise returned by the function.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 12
     */
    getLocalAddress(): Promise<NetAddress>;

    /**
     * Listens for message receiving events of the TLSSocket connection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<{ message: ArrayBuffer, remoteInfo: SocketRemoteInfo }> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Listens for message receiving events of the TLSSocket connection.
     * @param { 'message' } type Indicates Event name.
     * @param { Callback<{ message: ArrayBuffer, remoteInfo: SocketRemoteInfo }> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    /**
     * Listens for message receiving events of the TLSSocket connection.
     * @param { 'message' } type Indicates Event name.
     * @param { Callback<SocketMessageInfo> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 11
     */
    on(type: 'message', callback: Callback<SocketMessageInfo>): void;

    /**
     * Cancels listening for message receiving events of the TLSSocket connection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<{ message: ArrayBuffer, remoteInfo: SocketRemoteInfo }> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Cancels listening for message receiving events of the TLSSocket connection.
     * @param { 'message' } type Indicates Event name.
     * @param { Callback<{ message: ArrayBuffer, remoteInfo: SocketRemoteInfo }> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    /**
     * Cancels listening for message receiving events of the TLSSocket connection.
     * @param { 'message' } type Indicates Event name.
     * @param { Callback<SocketMessageInfo> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 11
     */
    off(type: 'message', callback?: Callback<SocketMessageInfo>): void;

    /**
     * Listens for connection or close events of the TLSSocket connection.
     * @param { 'connect' | 'close' } type - Indicates Event name.
     * @param {Callback<void> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Listens for connection or close events of the TLSSocket connection.
     * @param { 'connect' | 'close' } type - Indicates Event name.
     * @param {Callback<void> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    on(type: 'connect' | 'close', callback: Callback<void>): void;

    /**
     * Cancels listening for connection or close events of the TLSSocket connection.
     * @param { 'connect' | 'close' } type - Indicates Event name.
     * @param {Callback<void> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Cancels listening for connection or close events of the TLSSocket connection.
     * @param { 'connect' | 'close' } type - Indicates Event name.
     * @param {Callback<void> } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    off(type: 'connect' | 'close', callback?: Callback<void>): void;

    /**
     * Listens for error events of the TLSSocket connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Listens for error events of the TLSSocket connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    on(type: 'error', callback: ErrorCallback): void;

    /**
     * Cancels listening for error events of the TLSSocket connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Cancels listening for error events of the TLSSocket connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - the callback used to return the result.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    off(type: 'error', callback?: ErrorCallback): void;

    /**
     * Returns an object representing a local certificate.
     * @param { AsyncCallback<X509CertRawData> } callback - the callback of getCertificate.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303504 - An error occurred when verifying the X.509 certificate.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Returns an object representing a local certificate.
     * @param { AsyncCallback<X509CertRawData> } callback - the callback of getCertificate.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303504 - An error occurred when verifying the X.509 certificate.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getCertificate(callback: AsyncCallback<X509CertRawData>): void;

    /**
     * Returns an object representing a local certificate.
     * @returns { Promise<X509CertRawData> } The promise returned by the function.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303504 - An error occurred when verifying the X.509 certificate.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Returns an object representing a local certificate.
     * @returns { Promise<X509CertRawData> } The promise returned by the function.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303504 - An error occurred when verifying the X.509 certificate.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getCertificate(): Promise<X509CertRawData>;

    /**
     * <p>Returns an object representing the peer certificate. If the peer does not provide a certificate,
     * <p>an empty object will be returned. If the socket is destroyed, null is returned.</p>
     * It only contains the peer's certificate.
     * @param { AsyncCallback<X509CertRawData> } callback - the callback of getRemoteCertificate.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * <p>Returns an object representing the peer certificate. If the peer does not provide a certificate,
     * <p>an empty object will be returned. If the socket is destroyed, null is returned.</p>
     * It only contains the peer's certificate.
     * @param { AsyncCallback<X509CertRawData> } callback - the callback of getRemoteCertificate.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getRemoteCertificate(callback: AsyncCallback<X509CertRawData>): void;

    /**
     * <p>Returns an object representing the peer certificate. If the peer does not provide a certificate,
     * <p>an empty object will be returned. If the socket is destroyed, null is returned.</p>
     * It only contains the peer's certificate.
     * @returns { Promise<X509CertRawData> } The promise returned by the function.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * <p>Returns an object representing the peer certificate. If the peer does not provide a certificate,
     * <p>an empty object will be returned. If the socket is destroyed, null is returned.</p>
     * It only contains the peer's certificate.
     * @returns { Promise<X509CertRawData> } The promise returned by the function.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getRemoteCertificate(): Promise<X509CertRawData>;

    /**
     * Returns a string containing the negotiated SSL/TLS protocol version of the current connection.
     * For connected sockets that have not completed the handshake process, the value 'unknown' will be returned.
     * Server sockets or disconnected client sockets will return a value of null.
     * @param { AsyncCallback<string> } callback - the callback of getProtocol.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Returns a string containing the negotiated SSL/TLS protocol version of the current connection.
     * For connected sockets that have not completed the handshake process, the value 'unknown' will be returned.
     * Server sockets or disconnected client sockets will return a value of null.
     * @param { AsyncCallback<string> } callback - the callback of getProtocol.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getProtocol(callback: AsyncCallback<string>): void;

    /**
     * Returns a string containing the negotiated SSL/TLS protocol version of the current connection.
     * For connected sockets that have not completed the handshake process, the value 'unknown' will be returned.
     * Server sockets or disconnected client sockets will return a value of null.
     * @returns { Promise<string> } The promise returned by the function.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Returns a string containing the negotiated SSL/TLS protocol version of the current connection.
     * For connected sockets that have not completed the handshake process, the value 'unknown' will be returned.
     * Server sockets or disconnected client sockets will return a value of null.
     * @returns { Promise<string> } The promise returned by the function.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getProtocol(): Promise<string>;

    /**
     * Returns a list containing the negotiated cipher suite information.
     * For example:{"TLS_RSA_WITH_AES_128_CBC_SHA256", "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256"}
     * @param { AsyncCallback<Array<string>> } callback - the callback of getCipherSuite.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303502 - An error occurred when reading data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Returns a list containing the negotiated cipher suite information.
     * For example:{"TLS_RSA_WITH_AES_128_CBC_SHA256", "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256"}
     * @param { AsyncCallback<Array<string>> } callback - the callback of getCipherSuite.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303502 - An error occurred when reading data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getCipherSuite(callback: AsyncCallback<Array<string>>): void;

    /**
     * Returns a list containing the negotiated cipher suite information.
     * For example:{"TLS_RSA_WITH_AES_128_CBC_SHA256", "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256"}
     * @returns { Promise<Array<string>> } The promise returned by the function.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303502 - An error occurred when reading data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Returns a list containing the negotiated cipher suite information.
     * For example:{"TLS_RSA_WITH_AES_128_CBC_SHA256", "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256"}
     * @returns { Promise<Array<string>> } The promise returned by the function.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303502 - An error occurred when reading data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getCipherSuite(): Promise<Array<string>>;

    /**
     * <p>The list of signature algorithms shared between the server and the client,
     * in descending order of priority.</p>
     * @param { AsyncCallback<Array<string>> } callback - the callback of getSignatureAlgorithms.@see https://www.openssl.org/docs/man1.1.1/man3/SSL_get_shared_sigalgs.html
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * <p>The list of signature algorithms shared between the server and the client,
     * in descending order of priority.</p>
     * @param { AsyncCallback<Array<string>> } callback - the callback of getSignatureAlgorithms.@see https://www.openssl.org/docs/man1.1.1/man3/SSL_get_shared_sigalgs.html
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getSignatureAlgorithms(callback: AsyncCallback<Array<string>>): void;

    /**
     * <p>The list of signature algorithms shared between the server and the client,
     * in descending order of priority.</p>
     * @returns { Promise<Array<string>> } The promise returned by the function.@see https://www.openssl.org/docs/man1.1.1/man3/SSL_get_shared_sigalgs.html
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * <p>The list of signature algorithms shared between the server and the client,
     * in descending order of priority.</p>
     * @returns { Promise<Array<string>> } The promise returned by the function.@see https://www.openssl.org/docs/man1.1.1/man3/SSL_get_shared_sigalgs.html
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    getSignatureAlgorithms(): Promise<Array<string>>;

    /**
     * Sets up a connection to the specified IP address and port number.
     * Only TCP is supported.
     * @param { TLSConnectOptions } options - Optional parameters {@link TLSConnectOptions}.
     * @param { AsyncCallback<void> } callback - the callback of connect.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303104 - Interrupted system call.
     * @throws { BusinessError } 2303109 - Bad file number.
     * @throws { BusinessError } 2303111 - Resource temporarily unavailable. Try again.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2303191 - Incorrect socket protocol type.
     * @throws { BusinessError } 2303198 - Address already in use.
     * @throws { BusinessError } 2303199 - Cannot assign requested address.
     * @throws { BusinessError } 2303210 - Connection timed out.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303502 - An error occurred when reading data on the TLS socket.
     * @throws { BusinessError } 2303503 - An error occurred when writing data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Sets up a connection to the specified IP address and port number.
     * Only TCP is supported.
     * @param { TLSConnectOptions } options - Optional parameters {@link TLSConnectOptions}.
     * @param { AsyncCallback<void> } callback - the callback of connect.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303104 - Interrupted system call.
     * @throws { BusinessError } 2303109 - Bad file number.
     * @throws { BusinessError } 2303111 - Resource temporarily unavailable. Try again.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2303191 - Incorrect socket protocol type.
     * @throws { BusinessError } 2303198 - Address already in use.
     * @throws { BusinessError } 2303199 - Cannot assign requested address.
     * @throws { BusinessError } 2303210 - Connection timed out.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303502 - An error occurred when reading data on the TLS socket.
     * @throws { BusinessError } 2303503 - An error occurred when writing data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    connect(options: TLSConnectOptions, callback: AsyncCallback<void>): void;

    /**
     * Sets up a connection to the specified IP address and port number.
     * Only TCP is supported.
     * @param { TLSConnectOptions } options - Optional parameters {@link TLSConnectOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303104 - Interrupted system call.
     * @throws { BusinessError } 2303109 - Bad file number.
     * @throws { BusinessError } 2303111 - Resource temporarily unavailable. Try again.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2303191 - Incorrect socket protocol type.
     * @throws { BusinessError } 2303198 - Address already in use.
     * @throws { BusinessError } 2303199 - Cannot assign requested address.
     * @throws { BusinessError } 2303210 - Connection timed out.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303502 - An error occurred when reading data on the TLS socket.
     * @throws { BusinessError } 2303503 - An error occurred when writing data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Sets up a connection to the specified IP address and port number.
     * Only TCP is supported.
     * @param { TLSConnectOptions } options - Optional parameters {@link TLSConnectOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303104 - Interrupted system call.
     * @throws { BusinessError } 2303109 - Bad file number.
     * @throws { BusinessError } 2303111 - Resource temporarily unavailable. Try again.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2303191 - Incorrect socket protocol type.
     * @throws { BusinessError } 2303198 - Address already in use.
     * @throws { BusinessError } 2303199 - Cannot assign requested address.
     * @throws { BusinessError } 2303210 - Connection timed out.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303502 - An error occurred when reading data on the TLS socket.
     * @throws { BusinessError } 2303503 - An error occurred when writing data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    connect(options: TLSConnectOptions): Promise<void>;

    /**
     * Sends data over a TLSSocket connection.
     * @param { string } data - Parameters for sending data {@link string}.
     * @param { AsyncCallback<void> } callback - the callback of send.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303503 - An error occurred when writing data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Sends data over a TLSSocket connection.
     * @param { string } data - Parameters for sending data {@link string}.
     * @param { AsyncCallback<void> } callback - the callback of send.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303503 - An error occurred when writing data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    /**
     * Sends data over a TLSSocket connection.
     * @param { string | ArrayBuffer } data - Parameters for sending data.
     * @param { AsyncCallback<void> } callback - the callback of send.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303503 - An error occurred when writing data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    send(data: string | ArrayBuffer, callback: AsyncCallback<void>): void;

    /**
     * Sends data over a TLSSocket connection.
     * @param { string } data - Parameters for sending data {@link string}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303503 - An error occurred when writing data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Sends data over a TLSSocket connection.
     * @param { string } data - Parameters for sending data {@link string}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303503 - An error occurred when writing data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    /**
     * Sends data over a TLSSocket connection.
     * @param { string | ArrayBuffer } data - Parameters for sending data.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303503 - An error occurred when writing data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    send(data: string | ArrayBuffer): Promise<void>;

    /**
     * Closes a TLSSocket connection
     * @param { AsyncCallback<void> } callback - the callback of close.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Closes a TLSSocket connection
     * @param { AsyncCallback<void> } callback - the callback of close.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    close(callback: AsyncCallback<void>): void;

    /**
     * Closes a TLSSocket connection
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Closes a TLSSocket connection
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    close(): Promise<void>;
  }

  /**
   * Defines TLS security options. The CA certificate is mandatory, and other parameters are optional.
   * @interface TLSSecureOptions
   * @syscap SystemCapability.Communication.NetStack
   * @since 9
   */
  /**
   * Defines TLS security options. The CA certificate is mandatory, and other parameters are optional.
   * @interface TLSSecureOptions
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 10
   */
  export interface TLSSecureOptions {
    /**
     * Certificate used to verify the identity of the server
     * @type {string | Array<string>}
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Certificate used to verify the identity of the server.
     * @type {string | Array<string>}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    /**
     * Certificate used to verify the identity of the server, if it is not set, use system ca.
     * @type {?(string | Array<string>)}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    ca?: string | Array<string>;

    /**
     * Certificate proving the identity of the client
     * @type {?string}
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Certificate proving the identity of the client
     * @type {?string}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    cert?: string;

    /**
     * Private key of client certificate
     * @type {?string}
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Private key of client certificate
     * @type {?string}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    key?: string;

    /**
     * Password of the private key
     * @type {?string}
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Password of the private key
     * @type {?string}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    password?: string;

    /**
     * TLS protocol version
     * @type {?Protocol | Array<Protocol>}
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * TLS protocol version
     * @type {?(Protocol | Array<Protocol>)}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    protocols?: Protocol | Array<Protocol>;

    /**
     * default is false, use local cipher.
     * @type {?boolean}
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * default is false, use local cipher.
     * @type {?boolean}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    useRemoteCipherPrefer?: boolean;

    /**
     * <P>Supported signature algorithms. This string can contain summary algorithms(SHA256,MD5,etc),Public key algorithm(RSA-PSS,ECDSA,etc),
     * Combination of the two(For example 'RSA+SHA384') or TLS v1.3 Scheme name(For example  rsa_pss_pss_sha512)</P>
     * @type {?string}
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * <P>Supported signature algorithms. This string can contain summary algorithms(SHA256,MD5,etc),Public key algorithm(RSA-PSS,ECDSA,etc),
     * Combination of the two(For example 'RSA+SHA384') or TLS v1.3 Scheme name(For example  rsa_pss_pss_sha512)</P>
     * @type {?string}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    signatureAlgorithms?: string;

    /**
     * Crypto suite specification
     * @type {?string}
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Crypto suite specification
     * @type {?string}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    cipherSuite?: string;

    /**
     * Used to set up bidirectional authentication. The default value is false.
     * @type {?boolean}
     * @syscap SystemCapability.Communication.NetStack
     * @since 12
     */
    isBidirectionalAuthentication?: boolean;
  }

  /**
   * Defines TLS connection options.
   * @interface TLSConnectOptions
   * @syscap SystemCapability.Communication.NetStack
   * @since 9
   */
  /**
   * Defines TLS connection options.
   * @interface TLSConnectOptions
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 10
   */
  export interface TLSConnectOptions {
    /**
     * Gateway address.
     * @type {NetAddress}
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Gateway address.
     * @type {NetAddress}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    address: NetAddress;

    /**
     * Protocol http2TLS security related operations.
     * @type {TLSSecureOptions}
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Protocol http2TLS security related operations.
     * @type {TLSSecureOptions}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    secureOptions: TLSSecureOptions;

    /**
     * Application layer protocol negotiation extension, such as "spdy/1", "http/1.1", "h2"
     * @type {?Array<string>}
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Application layer protocol negotiation extension, such as "spdy/1", "http/1.1", "h2"
     * @type {?Array<string>}
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    ALPNProtocols?: Array<string>;

    /**
     * Skip identity verification for remote servers. The default value is false.
     * @type {?boolean}
     * @syscap SystemCapability.Communication.NetStack
     * @since 12
     */
    skipRemoteValidation?: boolean;
  }

  /**
   * Enumerates TLS protocol versions.
   * @enum {string}
   * @syscap SystemCapability.Communication.NetStack
   * @since 9
   */
  /**
   * Enumerates TLS protocol versions.
   * @enum {string}
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 10
   */
  export enum Protocol {
    /**
     * Use TLSv1.2 protocol for communication.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Use TLSv1.2 protocol for communication.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    TLSv12 = "TLSv1.2",

    /**
     * Use TLSv1.3 protocol for communication.
     * @syscap SystemCapability.Communication.NetStack
     * @since 9
     */
    /**
     * Use TLSv1.3 protocol for communication.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 10
     */
    TLSv13 = "TLSv1.3"
  }

  /**
   * Defines the connection of the TCPSocket client and server.
   * @interface TCPSocketConnection
   * @syscap SystemCapability.Communication.NetStack
   * @since 10
   */
  export interface TCPSocketConnection {
    /**
     * The id of a client connects to the TCPSocketServer.
     * @type {number}
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    clientId: number;

    /**
     * Sends data over a TCPSocketServer connection to client.
     * @permission ohos.permission.INTERNET
     * @param { TCPSendOptions } options - Parameters for sending data {@link TCPSendOptions}.
     * @param { AsyncCallback<void> } callback - The callback of send.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    send(options: TCPSendOptions, callback: AsyncCallback<void>): void;

    /**
     * Sends data over a TCPSocketServer connection to client.
     * @permission ohos.permission.INTERNET
     * @param { TCPSendOptions } options - Parameters for sending data {@link TCPSendOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    send(options: TCPSendOptions): Promise<void>;

    /**
     * Closes a TCPSocket client connection.
     * @permission ohos.permission.INTERNET
     * @param { AsyncCallback<void> } callback - The callback of close.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    close(callback: AsyncCallback<void>): void;

    /**
     * Closes a TCPSocket client connection.
     * @permission ohos.permission.INTERNET
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    close(): Promise<void>;

    /**
     * Obtains the peer address of a TCPSocketServer connection.
     * @permission ohos.permission.INTERNET
     * @param { AsyncCallback<NetAddress> } callback - The callback of getRemoteAddress.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getRemoteAddress(callback: AsyncCallback<NetAddress>): void;

    /**
     * Obtains the peer address of a TCPSocketServer connection.
     * @permission ohos.permission.INTERNET
     * @returns { Promise<NetAddress> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getRemoteAddress(): Promise<NetAddress>;

    /**
     * Obtains the local address of a TCPSocketServer connection.
     * @returns { Promise<NetAddress> } The promise returned by the function.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 12
     */
    getLocalAddress(): Promise<NetAddress>;

    /**
     * Listens for message receiving events of the TCPSocketConnection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<{ message: ArrayBuffer, remoteInfo: SocketRemoteInfo }> } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    /**
     * Listens for message receiving events of the TCPSocketConnection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<SocketMessageInfo> } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Listens for message receiving events of the TCPSocketConnection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<SocketMessageInfo> } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    on(type: 'message', callback: Callback<SocketMessageInfo>): void;

    /**
     * Cancels listening for message receiving events of the TCPSocketConnection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<{ message: ArrayBuffer, remoteInfo: SocketRemoteInfo }> } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    /**
     * Cancels listening for message receiving events of the TCPSocketConnection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<SocketMessageInfo> } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Cancels listening for message receiving events of the TCPSocketConnection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<SocketMessageInfo> } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    off(type: 'message', callback?: Callback<SocketMessageInfo>): void;

    /**
     * Listens for close events of the TCPSocketConnection.
     * @param { 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    on(type: 'close', callback: Callback<void>): void;

    /**
     * Cancels listening for close events of the TCPSocketConnection.
     * @param { 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    off(type: 'close', callback?: Callback<void>): void;

    /**
     * Listens for error events of the TCPSocketConnection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    on(type: 'error', callback: ErrorCallback): void;

    /**
     * Cancels listening for error events of the TCPSocketConnection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    off(type: 'error', callback?: ErrorCallback): void;
  }

  /**
   * Defines a TCPSocket server connection.
   * @interface TCPSocketServer
   * @syscap SystemCapability.Communication.NetStack
   * @since 10
   */
  export interface TCPSocketServer {
    /**
     * Binds the IP address and port number, the port number can be specified or randomly allocated by the system.
     * <p>Listens for a TCPSocket connection to be made to this socket and accepts it. This interface uses multiple threads
     * for accept processing and uses poll multiplex to process client connections.</p>
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } address - Network address information {@link NetAddress}.
     * @param { AsyncCallback<void> } callback - The callback of listen.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2303109 - Bad file number.
     * @throws { BusinessError } 2303111 - Resource temporarily unavailable. Try again.
     * @throws { BusinessError } 2303198 - Address already in use.
     * @throws { BusinessError } 2303199 - Cannot assign requested address.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    listen(address: NetAddress, callback: AsyncCallback<void>): void;

    /** 
     * Binds the IP address and port number, the port number can be specified or randomly allocated by the system.
     * <p>Listens for a TCPSocket connection to be made to this socket and accepts it. This interface uses multiple threads
     * for accept processing and uses poll multiplex to process client connections.</p>
     * @permission ohos.permission.INTERNET
     * @param { NetAddress } address - Network address information {@link NetAddress}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2303109 - Bad file number.
     * @throws { BusinessError } 2303111 - Resource temporarily unavailable. Try again.
     * @throws { BusinessError } 2303198 - Address already in use.
     * @throws { BusinessError } 2303199 - Cannot assign requested address.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    listen(address: NetAddress): Promise<void>;

    /**
     * Obtains the status of the TCPSocketServer connection.
     * @permission ohos.permission.INTERNET
     * @param { AsyncCallback<SocketStateBase> } callback - The callback of getState.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getState(callback: AsyncCallback<SocketStateBase>): void;

    /**
     * Obtains the status of the TCPSocketServer connection.
     * @permission ohos.permission.INTERNET
     * @returns { Promise<SocketStateBase> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getState(): Promise<SocketStateBase>;

    /**
     * Sets other attributes of the TCPSocketServer connection.
     * @permission ohos.permission.INTERNET
     * @param { TCPExtraOptions } options - Parameters of the attributes {@link TCPExtraOptions}.
     * @param { AsyncCallback<void> } callback - The callback of setExtraOptions.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    setExtraOptions(options: TCPExtraOptions, callback: AsyncCallback<void>): void;

    /**
     * Sets other attributes of the TCPSocketServer connection.
     * @permission ohos.permission.INTERNET
     * @param { TCPExtraOptions } options - Parameters of the attributes {@link TCPExtraOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    setExtraOptions(options: TCPExtraOptions): Promise<void>;

    /**
     * Obtains the local address of a TCPSocketServer connection.
     * @returns { Promise<NetAddress> } The promise returned by the function.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 12
     */
    getLocalAddress(): Promise<NetAddress>;

    /**
     * Listens for connect events of the TCPSocketServer connection.
     * @param { 'connect' } type - Indicates Event name.
     * @param { Callback<TCPSocketConnection> } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    on(type: 'connect', callback: Callback<TCPSocketConnection>): void;

    /**
     * Cancels listening for connect events of the TCPSocketServer connection.
     * @param { 'connect' } type - Indicates Event name.
     * @param { Callback<TCPSocketConnection> } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    off(type: 'connect', callback?: Callback<TCPSocketConnection>): void;

    /**
     * Listens for error events of the TCPSocketServer connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    on(type: 'error', callback: ErrorCallback): void;

    /**
     * Cancels listening for error events of the TCPSocketServer connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    off(type: 'error', callback?: ErrorCallback): void;
  }

  /**
   * Defines the connection of the TLSSocket client and server.
   * @interface TLSSocketConnection
   * @syscap SystemCapability.Communication.NetStack
   * @since 10
   */
  export interface TLSSocketConnection {
    /**
     * The id of a client connects to the TLSSocketServer.
     * @type {number}
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    clientId: number;

    /**
     * Sends data over a TLSSocketServer connection to client.
     * @param { string } data - Parameters for sending data.
     * @param { AsyncCallback<void> } callback - The callback of send.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303503 - An error occurred when writing data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    /**
     * Sends data over a TLSSocketServer connection to client.
     * @param { string | ArrayBuffer } data - Parameters for sending data.
     * @param { AsyncCallback<void> } callback - The callback of send.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303503 - An error occurred when writing data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 12
     */
    send(data: string | ArrayBuffer, callback: AsyncCallback<void>): void;

    /**
     * Sends data over a TLSSocketServer connection to client.
     * @param { string } data - Parameters for sending data.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303503 - An error occurred when writing data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    /**
     * Sends data over a TLSSocketServer connection to client.
     * @param { string | ArrayBuffer } data - Parameters for sending data.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303503 - An error occurred when writing data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 12
     */
    send(data: string | ArrayBuffer): Promise<void>;

    /**
     * Closes a TLSSocket client connection.
     * @param { AsyncCallback<void> } callback - The callback of close.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    close(callback: AsyncCallback<void>): void;

    /**
     * Closes a TLSSocket client connection.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    close(): Promise<void>;

    /**
     * Obtains the peer address of a TLSSocketServer connection.
     * @param { AsyncCallback<NetAddress> } callback - The callback of getRemoteAddress.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getRemoteAddress(callback: AsyncCallback<NetAddress>): void;

    /**
     * Obtains the peer address of a TLSSocketServer connection.
     * @returns { Promise<NetAddress> } The promise returned by the function.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getRemoteAddress(): Promise<NetAddress>;

    /**
     * <p>Returns an object representing the peer certificate. If the peer does not provide a certificate,
     * an empty object will be returned. If the socket is destroyed, null is returned.</p>
     * It only contains the peer's certificate.
     * @param { AsyncCallback<X509CertRawData> } callback - The callback of getRemoteCertificate.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getRemoteCertificate(callback: AsyncCallback<X509CertRawData>): void;

    /**
     * <p>Returns an object representing the peer certificate. If the peer does not provide a certificate,
     * an empty object will be returned. If the socket is destroyed, null is returned.</p>
     * It only contains the peer's certificate.
     * @returns { Promise<X509CertRawData> } The promise returned by the function.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getRemoteCertificate(): Promise<X509CertRawData>;

    /**
     * Returns a list containing the negotiated cipher suite information.
     * For example:{"TLS_RSA_WITH_AES_128_CBC_SHA256", "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256"}
     * @param { AsyncCallback<Array<string>> } callback - The callback of getCipherSuite.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303502 - An error occurred when reading data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getCipherSuite(callback: AsyncCallback<Array<string>>): void;

    /**
     * Returns a list containing the negotiated cipher suite information.
     * For example:{"TLS_RSA_WITH_AES_128_CBC_SHA256", "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256"}
     * @returns { Promise<Array<string>> } The promise returned by the function.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303502 - An error occurred when reading data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getCipherSuite(): Promise<Array<string>>;

    /**
     * <p>The list of signature algorithms shared between the server and the client,
     * in descending order of priority.</p>
     * @param { AsyncCallback<Array<string>> } callback - The callback of getSignatureAlgorithms.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getSignatureAlgorithms(callback: AsyncCallback<Array<string>>): void;

    /**
     * <p>The list of signature algorithms shared between the server and the client,
     * in descending order of priority.</p>
     * @returns { Promise<Array<string>> } The promise returned by the function.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getSignatureAlgorithms(): Promise<Array<string>>;

    /**
     * Obtains the local address of a TLSSocketServer connection.
     * @returns { Promise<NetAddress> } The promise returned by the function.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 12
     */
    getLocalAddress(): Promise<NetAddress>;

    /**
     * Listens for message receiving events of the TLSSocketConnection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<{ message: ArrayBuffer, remoteInfo: SocketRemoteInfo }> } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    /**
     * Listens for message receiving events of the TLSSocketConnection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<SocketMessageInfo> } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Listens for message receiving events of the TLSSocketConnection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<SocketMessageInfo> } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    on(type: 'message', callback: Callback<SocketMessageInfo>): void;

    /**
     * Cancels listening for message receiving events of the TLSSocketConnection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<{ message: ArrayBuffer, remoteInfo: SocketRemoteInfo }> } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    /**
     * Cancels listening for message receiving events of the TLSSocketConnection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<SocketMessageInfo> } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 11
     */
    /**
     * Cancels listening for message receiving events of the TLSSocketConnection.
     * @param { 'message' } type - Indicates Event name.
     * @param { Callback<SocketMessageInfo> } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 12
     */
    off(type: 'message', callback?: Callback<SocketMessageInfo>): void;

    /**
     * Listens for close events of the TLSSocketConnection.
     * @param { 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    on(type: 'close', callback: Callback<void>): void;

    /**
     * Cancels listening for close events of the TLSSocketConnection.
     * @param { 'close' } type - Indicates Event name.
     * @param { Callback<void> } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    off(type: 'close', callback?: Callback<void>): void;

    /**
     * Listens for error events of the TLSSocketConnection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    on(type: 'error', callback: ErrorCallback): void;

    /**
     * Cancels listening for error events of the TLSSocketConnection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    off(type: 'error', callback?: ErrorCallback): void;
  }

  /**
   * Defines the socket connection information.
   * @interface SocketMessageInfo
   * @syscap SystemCapability.Communication.NetStack
   * @crossplatform
   * @since 11
   */
  export interface SocketMessageInfo {
    /**
     * Receive the message event.
     * @type { ArrayBuffer }
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 11
     */
    message: ArrayBuffer;
    /**
     * Socket connection information.
     * @type { SocketRemoteInfo }
     * @syscap SystemCapability.Communication.NetStack
     * @crossplatform
     * @since 11
     */
    remoteInfo: SocketRemoteInfo;
  }

  /**
   * Defines a TLSSocketServer server connection.
   * @interface TLSSocketServer
   * @syscap SystemCapability.Communication.NetStack
   * @since 10
   */
  export interface TLSSocketServer {
    /**
     * Binds the IP address and port number, the port number can be specified or randomly allocated by the system.
     * <p>Listens for a TCPSocket connection to be made to this socket and accepts it. This interface uses multiple threads
     * for accept processing and uses poll multiplex to process client connections.</p>
     * @permission ohos.permission.INTERNET
     * @param { TLSConnectOptions } options - TLS connection options {@link TLSConnectOptions}.
     * @param { AsyncCallback<void> } callback - The callback of listen.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2303109 - Bad file number.
     * @throws { BusinessError } 2303111 - Resource temporarily unavailable. Try again.
     * @throws { BusinessError } 2303198 - Address already in use.
     * @throws { BusinessError } 2303199 - Cannot assign requested address.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303502 - An error occurred when reading data on the TLS socket.
     * @throws { BusinessError } 2303503 - An error occurred when writing data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    listen(options: TLSConnectOptions, callback: AsyncCallback<void>): void;

    /** 
     * Binds the IP address and port number, the port number can be specified or randomly allocated by the system.
     * <p>Listens for a TCPSocket connection to be made to this socket and accepts it. This interface uses multiple threads
     * for accept processing and uses poll multiplex to process client connections.</p>
     * @permission ohos.permission.INTERNET
     * @param { TLSConnectOptions } options - TLS connection options {@link TLSConnectOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 201 - Permission denied.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2303109 - Bad file number.
     * @throws { BusinessError } 2303111 - Resource temporarily unavailable. Try again.
     * @throws { BusinessError } 2303198 - Address already in use.
     * @throws { BusinessError } 2303199 - Cannot assign requested address.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303502 - An error occurred when reading data on the TLS socket.
     * @throws { BusinessError } 2303503 - An error occurred when writing data on the TLS socket.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2303506 - Failed to close the TLS connection.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    listen(options: TLSConnectOptions): Promise<void>;

    /**
     * Obtains the status of the TLSSocketServer connection.
     * @param { AsyncCallback<SocketStateBase> } callback - The callback of getState.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getState(callback: AsyncCallback<SocketStateBase>): void;

    /**
     * Obtains the status of the TLSSocketServer connection.
     * @returns { Promise<SocketStateBase> } The promise returned by the function.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getState(): Promise<SocketStateBase>;

    /**
     * Sets other attributes of the TLSSocketServer connection.
     * @param { TCPExtraOptions } options - Parameters of the attributes {@link TCPExtraOptions}.
     * @param { AsyncCallback<void> } callback - The callback of setExtraOptions.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    setExtraOptions(options: TCPExtraOptions, callback: AsyncCallback<void>): void;

    /**
     * Sets other attributes of the TLSSocketServer connection.
     * @param { TCPExtraOptions } options - Parameters of the attributes {@link TCPExtraOptions}.
     * @returns { Promise<void> } The promise returned by the function.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    setExtraOptions(options: TCPExtraOptions): Promise<void>;

    /**
     * Returns an object representing a local certificate.
     * @param { AsyncCallback<X509CertRawData> } callback - The callback of getCertificate.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303504 - An error occurred when verifying the X.509 certificate.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getCertificate(callback: AsyncCallback<X509CertRawData>): void;

    /**
     * Returns an object representing a local certificate.
     * @returns { Promise<X509CertRawData> } The promise returned by the function.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303504 - An error occurred when verifying the X.509 certificate.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getCertificate(): Promise<X509CertRawData>;

    /**
     * Returns a string containing the negotiated SSL/TLS protocol version of the current connection.
     * For connected sockets that have not completed the handshake process, the value 'unknown' will be returned.
     * Server sockets or disconnected client sockets will return a value of null.
     * @param { AsyncCallback<string> } callback - The callback of getProtocol.
     * @throws { BusinessError } 401 - Parameter error.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getProtocol(callback: AsyncCallback<string>): void;

    /**
     * Returns a string containing the negotiated SSL/TLS protocol version of the current connection.
     * For connected sockets that have not completed the handshake process, the value 'unknown' will be returned.
     * Server sockets or disconnected client sockets will return a value of null.
     * @returns { Promise<string> } The promise returned by the function.
     * @throws { BusinessError } 2303501 - SSL is null.
     * @throws { BusinessError } 2303505 - An error occurred in the TLS system call.
     * @throws { BusinessError } 2300002 - System internal error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    getProtocol(): Promise<string>;

    /**
     * Obtains the local address of the TLSSocketServer connection.
     * @returns { Promise<NetAddress> } The promise returned by the function.
     * @throws { BusinessError } 2300002 - System internal error.
     * @throws { BusinessError } 2301009 - Bad file descriptor.
     * @throws { BusinessError } 2303188 - Socket operation on non-socket.
     * @syscap SystemCapability.Communication.NetStack
     * @since 12
     */
    getLocalAddress(): Promise<NetAddress>;

    /**
     * Listens for connect events of the TLSSocketServer connection.
     * @param { 'connect' } type - Indicates Event name.
     * @param { Callback<TLSSocketConnection> } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    on(type: 'connect', callback: Callback<TLSSocketConnection>): void;

    /**
     * Cancels listening for connect events of the TLSSocketServer connection.
     * @param { 'connect' } type - Indicates Event name.
     * @param { Callback<TLSSocketConnection> } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    off(type: 'connect', callback?: Callback<TLSSocketConnection>): void;

    /**
     * Listens for error events of the TLSSocketServer connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - The callback of on.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    on(type: 'error', callback: ErrorCallback): void;

    /**
     * Cancels listening for error events of the TLSSocketServer connection.
     * @param { 'error' } type - Indicates Event name.
     * @param { ErrorCallback } callback - The callback of off.
     * @throws { BusinessError } 401 - Parameter error.
     * @syscap SystemCapability.Communication.NetStack
     * @since 10
     */
    off(type: 'error', callback?: ErrorCallback): void;
  }
}

export default socket;