import DEvent from '../../class/event';
import DPipeline from '../hook/modules/pipeline';
/**
 * 代理配置接口
 */
export interface IProxy {
    ipaddress: string;
    port: number;
    type?: 5;
    userId?: string;
    password?: string;
}
/**
 * 带规则的代理配置接口
 */
export interface IRuleProxy extends IProxy {
    rules?: string[];
}
/**
 * 目标地址接口
 */
export interface IDestination {
    addr: string;
    port: number;
}
/**
 * SOCKS5事件类型
 */
export declare const Socks5Event: {
    readonly Error: "error";
};
/**
 * SOCKS5事件类型
 */
export type Socks5EventType = (typeof Socks5Event)[keyof typeof Socks5Event];
/**
 * 日志接口
 */
export interface ILogger {
    log: (...args: any[]) => void;
    info: (...args: any[]) => void;
    warn: (...args: any[]) => void;
    error: (...args: any[]) => void;
}
export declare class Socks5 {
    private upstreamProxy;
    private server;
    private clientSockets;
    private systemProxy;
    private useSystemProxy;
    __debug: boolean;
    __uuid: string;
    __port: number;
    __event: DEvent;
    __pipeline: DPipeline;
    __logger: ILogger;
    __totalReceived: number;
    __totalSent: number;
    __rules: string[];
    constructor(upstreamProxy: IRuleProxy | IRuleProxy[], debug?: boolean, logger?: ILogger);
    get id(): string;
    get port(): number;
    get url(): string;
    get totalReceived(): number;
    get totalSent(): number;
    get rules(): string[];
    validateProxyConfig(proxyConfig: IProxy): "" | "无效的上游代理 IP 地址" | "无效的上游代理端口" | "无效的上游代理用户名" | "无效的上游代理密码";
    private filterProxyConfigs;
    start(startPort?: number): Promise<number>;
    private setupServer;
    restart(): boolean;
    setUpstreamProxy(upstreamProxy: IRuleProxy | IRuleProxy[]): boolean;
    setSystemProxy(use: boolean, config?: IProxy): void;
    /**
     * 查找可用端口
     * @param startPort 起始端口
     * @param maxRetries 最大重试次数
     * @returns 可用端口或0（表示失败）
     */
    private findAvailablePort;
    /**
     * 处理SOCKS5客户端连接
     * @param clientSocket 客户端socket连接
     */
    private handleSocksConnection;
    /**
     * 设置客户端socket事件处理
     * @param clientSocket 客户端socket连接
     */
    private setupClientSocketEvents;
    /**
     * 根据代理配置建立连接
     * @param clientSocket 客户端socket连接
     * @param destination 目标地址
     * @param proxyConfig 代理配置
     * @param addrport 地址端口字符串
     */
    private establishConnection;
    /**
     * 回复客户端请求响应数据
     * VER是SOCKS版本，这里应该是0x05；
     * REP应答字段：
     * 0x00表示成功
     * 0x01普通SOCKS服务器连接失败
     * 0x02现有规则不允许连接
     * 0x03网络不可达
     * 0x04主机不可达
     * 0x05连接被拒
     * 0x06 TTL超时
     * 0x07不支持的命令
     * 0x08不支持的地址类型
     * 0x09 - 0xFF未定义
     */
    /**
     * 握手
     * @param clientSocket
     * @returns
     */
    private performHandshake;
    /**
     * 解析请求
     * @param clientSocket
     * @returns
     */
    private parseClientRequest;
    private connectToUpstreamProxy;
    private connectToSystemProxy;
    private connectToProxy;
    private connectToLocal;
    private setupDataForwarding;
    /**
     * 查找适合目标地址的代理配置
     * @param addr 目标地址
     * @returns 匹配的代理配置或undefined
     */
    findProxyConfig(addr: string): IRuleProxy | undefined;
    /**
     * 检查域名是否符合规则
     * @param addr 目标地址
     * @param rules 规则列表
     * @returns 是否符合规则
     */
    private isAllowedDomain;
    close(): void;
    on(name: Socks5EventType, listener: (...args: any[]) => void): void;
    off(name: Socks5EventType, listener: (...args: any[]) => void): void;
    resetStatistics(): void;
    private _emit;
    private _updateRules;
}