SocksConsts.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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package java.net;

/**
 * Constants used by the SOCKS protocol implementation.
 */
// SOCKS协议中常用的常量
interface SocksConsts {
    
    static final int DEFAULT_PORT = 1080; // Socket代理默认端口号
    
    // SOCKS协议版本号
    static final int PROTO_VERS4 = 4;    // SOCKS4代理只支持TCP协议（即传输控制协议）
    static final int PROTO_VERS = 5;    // SOCKS5代理既支持TCP协议又支持UDP协议（即用户数据包协议），还支持各种身份验证机制、服务器端域名解析等
    
    // 认证方法，为SOCKS5协议支持
    static final int NO_AUTH = 0;   // 无验证
    static final int GSSAPI = 1;   // 通用安全服务应用程序接口验证，会在将来支持
    static final int USER_PASSW = 2;   // 用户名/密码验证
    static final int NO_METHODS = -1;   // 对验证方法未知
    
    // SOCKS协议指定，由客户端向代理端发送
    static final int CONNECT = 1;    // 连接
    static final int BIND = 2;    // 绑定
    static final int UDP_ASSOC = 3;    // 关联UDP端口
    
    // [远程地址结构]的地址类型
    static final int IPV4 = 1;    // IP4地址
    static final int DOMAIN_NAME = 3;    // 域名
    static final int IPV6 = 4;    // IP6地址
    
    // 代理端对客户端的最终响应
    static final int REQUEST_OK = 0;    // request granted
    static final int GENERAL_FAILURE = 1;    // general failure
    static final int NOT_ALLOWED = 2;    // connection not allowed by ruleset
    static final int NET_UNREACHABLE = 3;    // network unreachable
    static final int HOST_UNREACHABLE = 4;    // host unreachable
    static final int CONN_REFUSED = 5;    // connection refused by destination host
    static final int TTL_EXPIRED = 6;    // TTL expired
    static final int CMD_NOT_SUPPORTED = 7;    // command not supported / protocol error
    static final int ADDR_TYPE_NOT_SUP = 8;    // address type not supported
    
}