{"id":2492,"date":"2017-11-12T14:18:45","date_gmt":"2017-11-12T06:18:45","guid":{"rendered":"https:\/\/boweihe.me\/?p=2492"},"modified":"2017-11-12T14:18:45","modified_gmt":"2017-11-12T06:18:45","slug":"rfc1928-socks5%e5%8d%8f%e8%ae%ae-%e9%83%a8%e5%88%86%e5%86%85%e5%ae%b9%e7%bf%bb%e8%af%91","status":"publish","type":"post","link":"https:\/\/dayandcarrot.space\/?p=2492","title":{"rendered":"RFC1928 SOCKS5\u534f\u8bae – \u90e8\u5206\u5185\u5bb9\u7ffb\u8bd1"},"content":{"rendered":"

Reference:\u00a0https:\/\/www.ietf.org\/rfc\/rfc1928.txt<\/a>
\n\u53ea\u662f\u90e8\u5206\u7ae0\u8282\u7684\u7ffb\u8bd1<\/p>\n

\n

3. TCP\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u6d41\u7a0b<\/h3>\n

\u5f53\u67d0\u4e00\u57fa\u4e8eTCP\u7684\u5ba2\u6237\u7aef\u60f3\u8981\u7ecf\u7531\u9632\u706b\u5899\uff08\u53d6\u51b3\u4e8e\u5177\u4f53\u5b9e\u73b0\uff09\u4e0e\u8fdc\u7aef\u5bf9\u8c61\u5efa\u7acb\u8fde\u63a5\u65f6\uff0c\u5b83\u5fc5\u987b\u9996\u5148\u5f00\u542f\u4e0eSOCKS\u670d\u52a1\u5668\u4e0a\u5bf9\u5e94\u7aef\u53e3\u7684TCP\u8fde\u63a5\u3002\u901a\u5e38\u60c5\u51b5\u4e0bSOCKS\u670d\u52a1\u5668\u76d1\u542c\u7684TCP\u7aef\u53e3\u53f7\u662f1080. \u82e5\u8fde\u63a5\u8bf7\u6c42\u6210\u529f\uff0c\u5ba2\u6237\u7aef\u5c06\u8fdb\u5165\u6388\u6743\u6a21\u5f0f\u534f\u5546\u9636\u6bb5\uff0c\u968f\u540e\u4f7f\u7528\u6240\u9009\u7684\u6a21\u5f0f\u8fdb\u884c\u6388\u6743\uff0c\u7ee7\u800c\u5f00\u59cb\u8fde\u63a5\u3002SOCKS\u670d\u52a1\u5668\u5bf9\u8bf7\u6c42\u8fdb\u884c\u8bc4\u4f30\uff0c\u7ee7\u800c\u5efa\u7acb\u6307\u5b9a\u7684\u8fde\u63a5\u6216\u62d2\u7edd\u8fde\u63a5\u3002
\n\u9664\u975e\u53e6\u6709\u8bf4\u660e\uff0c\u4e0b\u6587\u6570\u636e\u62a5\u4e2d\u63d0\u53ca\u7684\u5341\u8fdb\u5236\u6570\u5b57\u5747\u4e3a\u5bf9\u5e94\u5b57\u6bb5\u7684\u5b57\u8282\u957f\u5ea6\u3002\u5f53\u67d0\u4e2a\u5b57\u8282\u5fc5\u987b\u662f\u4e00\u4e2a\u5177\u4f53\u6570\u503c\u65f6\uff0c\u4ee5X’hh’\u6765\u8868\u793a\u8fd9\u4e00\u5b57\u6bb5\u7684\u5177\u4f53\u503c\u3002\u5f53\u4f7f\u7528’Variable'(\u53ef\u53d8\u957f)\u65f6\uff0c\u8868\u793a\u8fd9\u4e00\u5b57\u6bb5\u62e5\u6709\u53ef\u53d8\u957f\u5ea6\u7684\u5185\u5bb9\uff0c\u5177\u4f53\u957f\u5ea6\u901a\u8fc7\u4e00\u4e2a\u5173\u8054\u7684\u957f\u5ea6\u5b57\u6bb5\u8868\u793a\uff0c\u6216\u6839\u636e\u67d0\u949f\u5177\u4f53\u7684\u6570\u636e\u7c7b\u578b\u5b57\u6bb5\u51b3\u5b9a\u3002
\n\u5ba2\u6237\u7aef\u8fde\u63a5\u81f3\u670d\u52a1\u5668\u5e76\u53d1\u9001\u4e00\u4e2a\u6807\u8bc6\u7b26\/\u65b9\u6cd5\u9009\u62e9\u4fe1\u606f\uff1a<\/p>\n

                   +----+----------+----------+\n                   |VER | NMETHODS | METHODS  |\n                   +----+----------+----------+\n                   | 1  |    1     | 1 to 255 |\n                   +----+----------+----------+<\/pre>\n
\u5176\u4e2d\uff0c\u5b57\u6bb5VER\u8bbe\u7f6e\u4e3aX’05’\u4ee5\u8868\u660e\u6b64\u534f\u8bae\u7684\u7248\u672c\u3002NMETHODS\u5b57\u6bb5\u5305\u542b\u4e86METHODS\u5b57\u6bb5\u4e2d\u6240\u586b\u9274\u6743\u65b9\u6cd5(method)\u7684\u4e2a\u6570\uff0c\u4ee5\u5b57\u8282\u4e3a\u957f\u5ea6\u5355\u4f4d\u2014\u2014METHODS\u4e2d\u7684\u4e00\u4e2a\u65b9\u6cd5\u6807\u8bc6\u7b26\u5360\u4e00\u4e2a\u5b57\u8282\u3002
\n\u670d\u52a1\u5668\u4eceMETHODS\u7ed9\u5b9a\u7684\u65b9\u6cd5\u4e2d\u9009\u62e9\u4e00\u79cd\uff0c\u56de\u4f20\u4e00\u4e2a\u65b9\u6cd5\u9009\u62e9\u6d88\u606f\uff1a<\/p>\n
                         +----+--------+\n                         |VER | METHOD |\n                         +----+--------+\n                         | 1  |   1    |\n                         +----+--------+<\/pre>\n
\u5982\u679c\u9009\u62e9\u7684\u65b9\u6cd5\u503c\u4e3aX’FF’\uff0c\u5219\u8868\u660e\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u5ba2\u6237\u7aef\u80fd\u63d0\u4f9b\u7684\u4efb\u4e00\u79cd\u9274\u6743\u65b9\u6cd5\uff0c\u5ba2\u6237\u7aef\u5fc5\u987b\u5728\u6536\u5230\u6b64\u6d88\u606f\u540e\u65ad\u5f00\u8fde\u63a5\u3002
\nMETHOD\u4e2d\u53ef\u4ee5\u5b9a\u4e49\u7684\u65b9\u6cd5\u4e3a\uff1a<\/p>\n
    \n
  • X’00’ \u65e0\u9700\u9274\u6743\u65b9\u6cd5<\/li>\n
  • X’01’ GSSAPI<\/li>\n
  • X’02’ \u7528\u6237\u540d\/\u5bc6\u7801<\/li>\n
  • X’03’ \u81f3 X’7F’ IANA\u6307\u5b9a<\/li>\n
  • X’80’ \u81f3 X’FE’ \u79c1\u6709\u65b9\u6cd5\u4fdd\u7559<\/li>\n
  • X’FF’ \u6ca1\u6709\u53ef\u63a5\u53d7\u7684\u65b9\u6cd5<\/li>\n<\/ul>\n
    \u968f\u540e\uff0c\u670d\u52a1\u5668\u4e0e\u5ba2\u6237\u7aef\u8fdb\u5165\u534f\u8bae\u7279\u5b9a\u7684\u5b50\u534f\u5546(sub-negotiation)\u9636\u6bb5\u3002
    \n\u534f\u8bae\u7279\u5b9a\u7684\u5b50\u534f\u5546\u8fc7\u7a0b\u5728\u63cf\u8ff0\u4e8e\u4e0d\u540c\u5907\u5fd8\u5f55\u4e2d\u3002
    \n\u672c\u534f\u8bae\u65b0\u65b9\u6cd5\u7684\u5f00\u53d1\u4eba\u5458\u5fc5\u987b\u5411IANA\u7533\u8bf7\u4e00\u4e2a\u65b0\u7684METHOD\u53f7……(\u7701\u7565\u4e24\u6bb5\u5408\u89c4\u76f8\u5173\u7684\u8bdd)<\/p>\n
    4. \u8bf7\u6c42(Requests)<\/h3>\n
    \u4e00\u65e6\u5b8c\u6210\u4e86\u534f\u8bae\u7279\u5b9a\u7684\u5b50\u534f\u5546\u8fc7\u7a0b\uff0c\u5ba2\u6237\u7aef\u4fbf\u53d1\u9001\u8bf7\u6c42\u7ec6\u8282\u3002\u5982\u679c\u65b9\u6cd5\u7684\u534f\u5546\u5305\u62ec\u4e86\u5b8c\u6574\u6027\u68c0\u67e5\u6216\u4fdd\u5bc6\u76f8\u5173\u7684\u5c01\u88c5\uff0c\u90a3\u4e48\u8fd9\u4e9b\u8bf7\u6c42\u5fc5\u987b\u4ee5\u6307\u5b9a\u65b9\u5f0f\u8fdb\u884c\u76f8\u540c\u7684\u5c01\u88c5\u3002
    \nSOCKS\u7684\u8bf7\u6c42\uff0c\u5176\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n
            +----+-----+-------+------+----------+----------+\n        |VER | CMD |  RSV  | ATYP | DST.ADDR | DST.PORT |\n        +----+-----+-------+------+----------+----------+\n        | 1  |  1  | X'00' |  1   | Variable |    2     |\n        +----+-----+-------+------+----------+----------+<\/pre>\n
    \u5176\u4e2d\uff1a<\/p>\n
      \n
    • VER: \u534f\u8bae\u7248\u672c\u53f7\uff1aX’05’<\/li>\n
    • CMD\n
        \n
      • CONNECT X’01’<\/li>\n
      • BIND X’02’<\/li>\n
      • UDP ASSOCIATE X’03’<\/li>\n<\/ul>\n<\/li>\n
      • RSV \u4fdd\u7559\u5b57\u6bb5<\/li>\n
      • ATYP \u5730\u5740\u7c7b\u578b\n
          \n
        • IP V4 \u5730\u5740: X’01’<\/li>\n
        • \u57df\u540d: X’03’<\/li>\n
        • IP V6 \u5730\u5740: X’04’<\/li>\n<\/ul>\n<\/li>\n
        • DST.ADDR \u671f\u671b\u7684\u76ee\u6807\u5730\u5740<\/li>\n
        • DST.PORT \u671f\u671b\u7684\u76ee\u6807\u7aef\u53e3\u53f7\uff0c\u4ee5\u7f51\u7edc\u5b57\u8282\u5e8f\u8868\u793a<\/li>\n<\/ul>\n
          5. \u5730\u5740(Addressing)<\/h3>\n
          \u4e00\u4e2a\u5730\u5740\u5b57\u6bb5(DST.ADDR, BND.ADDR)\u7684\u5177\u4f53\u7c7b\u578b\u7531ATYP\u5b57\u6bb5\u7684\u503c\u6765\u8868\u793a\uff1a<\/p>\n
            \n
          • X’01’ \u4e3a4\u4e2a\u5b57\u8282\u8868\u793a\u7684IPV4\u5730\u5740<\/li>\n
          • X’03’ \u8868\u793a\u4e00\u4e2a\u57df\u540d\uff0c\u5730\u5740\u5b57\u6bb5\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5b57\u8282\u8868\u793a\u540e\u7eed\u5b57\u7b26\u7684\u603b\u957f\u5ea6(\u5b57\u8282\u6570)\uff0c\u5730\u5740\u5b57\u6bb5\u4e0d\u5305\u542bNUL\u7ed3\u675f\u7b26<\/li>\n
          • X’04’ \u4e3a16\u5b57\u8282\u8868\u793a\u7684IPV6\u5730\u5740<\/li>\n<\/ul>\n
            6. \u56de\u590d(Replies)<\/h3>\n
            \u4e00\u65e6SOCKS\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\uff0cSOCKS\u8bf7\u6c42\u5373\u88ab\u53d1\u9001\uff0c\u968f\u5373\u8fdb\u884c\u9274\u6743\u65b9\u5f0f\u7684\u534f\u5546\u3002\u670d\u52a1\u5668\u7aef\u5bf9\u8bf7\u6c42\u8fdb\u884c\u8bc6\u522b\uff0c\u5e76\u4ee5\u4e0b\u5c5e\u5f62\u5f0f\u56de\u590d\uff1a<\/p>\n
                    +----+-----+-------+------+----------+----------+\n        |VER | REP |  RSV  | ATYP | BND.ADDR | BND.PORT |\n        +----+-----+-------+------+----------+----------+\n        | 1  |  1  | X'00' |  1   | Variable |    2     |\n        +----+-----+-------+------+----------+----------+<\/pre>\n
            \u5176\u4e2d\uff1a<\/p>\n
              \n
            • VER\uff1a\u534f\u8bae\u7248\u672c\u53f7: X’05’<\/li>\n
            • REP\uff1a\u56de\u590d\u5b57\u6bb5\uff1a\n
                \n
              • X’00’ \u6210\u529f<\/li>\n
              • X’01’ \u4e00\u822cSOCKS\u670d\u52a1\u5668\u9519\u8bef<\/li>\n
              • X’02’ \u89c4\u5219\u96c6(ruleset)\u4e0d\u5141\u8bb8\u8be5\u8fde\u63a5<\/li>\n
              • X’03’ \u7f51\u7edc\u4e0d\u53ef\u7528<\/li>\n
              • X’04’ \u4e3b\u673a\u4e0d\u53ef\u8fbe<\/li>\n
              • X’05’ \u8fde\u63a5\u88ab\u62d2\u7edd<\/li>\n
              • X’06’ TTL\u8d85\u65f6<\/li>\n
              • X’07’ \u4e0d\u652f\u6301\u8be5\u547d\u4ee4<\/li>\n
              • X’08’ \u4e0d\u652f\u6301\u8be5\u5730\u5740\u7c7b\u578b<\/li>\n
              • X’09’ \u81f3 X’FF’ \u5c1a\u672a\u6307\u5b9a<\/li>\n<\/ul>\n<\/li>\n
              • RSV\uff1a\u4fdd\u7559\u5b57\u6bb5<\/li>\n
              • ATYP\uff1a\u540e\u7eed\u5730\u5740\u7684\u7c7b\u578b\n
                  \n
                • IPV4\u5730\u5740: X’01’<\/li>\n
                • \u57df\u540d\uff1aX’03’<\/li>\n
                • IPV6\u5730\u5740: X’04’<\/li>\n<\/ul>\n<\/li>\n
                • BND.ADDR\uff1a \u670d\u52a1\u5668\u7ed1\u5b9a\u5730\u5740<\/li>\n
                • BND.PORT\uff1a\u670d\u52a1\u5668\u7ed1\u5b9a\u7aef\u53e3\u53f7\uff0c\u7f51\u7edc\u5b57\u8282\u5e8f\u8868\u793a<\/li>\n<\/ul>\n
                  CONNECT<\/h4>\n
                  \u5bf9CONNECT(\u8fde\u63a5)\u8bf7\u6c42\u7684\u56de\u590d\u4e2d\uff0cBND.PORT\u5305\u542b\u670d\u52a1\u5668\u6307\u6d3e\u7684\u7528\u4e8e\u8fde\u63a5\u8fdc\u7a0b\u4e3b\u673a\u7684\u7aef\u53e3\u53f7\uff0cBND.ADDR\u4e3a\u5bf9\u5e94\u7684IP\u5730\u5740\u3002\u6307\u6d3e\u7684BND.ADDR\u901a\u5e38\u4e0e\u5ba2\u6237\u7aef\u8bf7\u6c42\u7684\u76ee\u6807\u5730\u5740\u4e0d\u540c\uff0c\u56e0\u4e3a\u76ee\u6807\u4e3b\u673a\u53ef\u80fd\u62e5\u6709\u591a\u7ec4\u5730\u5740(multi-homed)\u3002\u9884\u671f\u60c5\u51b5\u4e0bSOCKS\u670d\u52a1\u5668\u4f7f\u7528DST.ADDR\u4e0eDST.PORT\uff0c\u8fde\u540c\u5ba2\u6237\u7aef\u7684\u5730\u5740\u3001\u7aef\u53e3\u53f7\uff0c\u4e00\u8d77\u786e\u5b9a\u4e00\u4e2aCONNECT\u8bf7\u6c42\u3002<\/p>\n
                  BIND<\/h4>\n
                  BIND(\u7ed1\u5b9a)\u8bf7\u6c42\u901a\u5e38\u7528\u5728\u90a3\u4e9b\u5ba2\u6237\u7aef\u9700\u8981\u63a5\u53d7(accept)\u670d\u52a1\u5668\u8fde\u63a5\u7684\u534f\u8bae\u4e2d\u3002FTP\u4fbf\u662f\u4e00\u4e2a\u4ee4\u4eba\u719f\u77e5\u7684\u4f8b\u5b50\uff0c\u5b83\u4e3b\u8981\u4f7f\u7528\u5ba2\u6237\u7aef->\u670d\u52a1\u5668\u8fde\u63a5\u6765\u53d1\u9001\u547d\u4ee4\u3001\u62a5\u544a\u72b6\u6001\uff0c\u4f46\u540c\u65f6\u4e5f\u4f1a\u7528\u670d\u52a1\u5668->\u5ba2\u6237\u7aef\u8fde\u63a5\u6765\u4f20\u8f93\u6570\u636e(e.g. LS, GET, PUT)\u3002
                  \n\u9884\u671f\u60c5\u51b5\u4e0b\uff0c\u5ba2\u6237\u7aef\u4e00\u4fa7\u7684\u5e94\u7528\u534f\u8bae\u4ec5\u5728\u4f7f\u7528\u8fc7CONNECT\u8bf7\u6c42\u5b8c\u6210\u4e00\u4e2a\u4e3b\u8fde\u63a5\u7684\u60c5\u51b5\u4e0b\uff0c\u518d\u4f7f\u7528BIND\u8bf7\u6c42\u8bf7\u6c42\u4e00\u4e2a\u4e8c\u6b21\u8fde\u63a5\u3002\u9884\u671f\u60c5\u51b5\u4e0bSOCKS\u670d\u52a1\u5668\u4f7f\u7528DST.ADDR\u4e0eDST.PORT\u6765\u786e\u5b9a\u4e00\u4e2aBIND\u8bf7\u6c42\u3002
                  \n\u5728\u4e00\u6b21BIND\u64cd\u4f5c\u8fc7\u7a0b\u4e2d\uff0cSOCKS\u670d\u52a1\u5668\u5c06\u7ed9\u5ba2\u6237\u7aef\u56de\u590d\u4e24\u6761\u6d88\u606f\u3002\u7b2c\u4e00\u6761\u5c06\u4f1a\u5728\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\u5e76\u7ed1\u5b9a\u4e00\u4e2a\u65b0\u7684socket\u53e3\u65f6\u53d1\u9001\u3002BND.PORT\u5b57\u6bb5\u5305\u542b\u4e86\u4e00\u4e2a\u7aef\u53e3\u53f7\uff0c\u8be5\u7aef\u53e3\u53f7\u662fSOCKS\u670d\u52a1\u5668\u6307\u6d3e\u7684\u7528\u4e8e\u63a5\u6536\u4f20\u5165\u8fde\u63a5\u7684\u3002BND.ADDR\u5305\u542b\u4e86\u5bf9\u5e94\u7684IP\u5730\u5740\u3002\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u5ba2\u6237\u7aef\u6839\u636e\u8fd9\u4e9b\u4fe1\u606f\u6765\u901a\u77e5(\u7ecf\u7531\u4e3b\u8fde\u63a5)\u5e94\u7528\u7a0b\u5e8f\u670d\u52a1\u5668\uff08\u76ee\u6807\u4e3b\u673a\uff09\u8fd9\u4e00\u5730\u5740\u7684\u5b58\u5728\u3002\u7b2c\u4e8c\u6b21\u5e94\u7b54\u53ea\u53d1\u751f\u4e0e\u9884\u671f\u7684\u4f20\u5165\u8fde\u63a5\u6210\u529f\u6216\u5931\u8d25\u53d1\u751f\u65f6\u3002\u5728\u4e8c\u6b21\u5e94\u7b54\u4e2d\uff0cBND.PORT\u53caBND.ADDR\u5b57\u6bb5\u5305\u542b\u4e86\u76ee\u6807\u4e3b\u673a(connecting host)\u7684\u5730\u5740\u548c\u7aef\u53e3\u53f7\u3002<\/p>\n
                  UDP ASSOCIATE<\/h4>\n
                  UDP ASSOCIATE\u8bf7\u6c42\u7528\u4f5cUDP\u4e2d\u7ee7\u8fc7\u7a0b\u4e2d\u5efa\u7acb\u5173\u8054\u4ee5\u5904\u7406UDP\u6570\u636e\u62a5\u6587\u3002DST.ADDR\u548cDST.PORT\u5b57\u6bb5\u5305\u542b\u4e86\u5ba2\u6237\u7aef\u671f\u671b\u5173\u8054\u7684\uff0c\u7528\u4e8e\u53d1\u9001UDP\u6570\u636e\u62a5\u7684\u76ee\u6807\u5730\u5740\u53ca\u7aef\u53e3\u53f7\u3002\u670d\u52a1\u5668\u6216\u80fd<\/strong>\u4f7f\u7528\u8fd9\u4e00\u4fe1\u606f\u6765\u9650\u5236\u8fde\u63a5\u8bf7\u6c42\u3002\u5982\u679c\u5ba2\u6237\u7aef\u5728UDP ASSOCIATE\u9636\u6bb5\u5c1a\u4e0d\u80fd\u62e5\u6709\u8fd9\u4e9b\u4fe1\u606f\uff0c\u5219\u5b83\u5fc5\u987b\u4f7f\u7528\u5168\u96f6\u7684\u7aef\u53e3\u53f7\u53ca\u5730\u5740\u3002
                  \n\u5f53UDP ASSOCIATE\u8bf7\u6c42\u5230\u8fbe\u7684TCP\u8fde\u63a5\u7ec8\u6b62\u65f6\uff0cUDP\u5173\u8054\u7ec8\u6b62\u3002
                  \n\u5728\u5bf9UDP ASSOCIATE\u8bf7\u6c42\u7684\u5e94\u7b54\u4e2d\uff0cBND.PORT\u548cBND.ADDR\u5b57\u6bb5\u8868\u660e\u4e86\u5ba2\u6237\u7aef\u5fc5\u987b\u53d1\u9001UDP\u4e2d\u7ee7\u8bf7\u6c42\u7684\u7aef\u53e3\u53f7\/\u5730\u5740\u3002<\/p>\n
                  \u5e94\u7b54\u5904\u7406<\/h4>\n
                  \u5f53\u5e94\u7b54\u5931\u8d25\u65f6(REP\u503c\u4e0d\u7b49\u4e8eX’00’)\uff0cSOCKS\u670d\u52a1\u5668\u5fc5\u987b\u5728\u53d1\u9001\u5e94\u7b54\u6d88\u606f\u540e\u7acb\u5373\u5173\u95edTCP\u8fde\u63a5\u3002\u8fd9\u4e00\u64cd\u4f5c\u5fc5\u987b\u5728\u68c0\u6d4b\u5230\u5f02\u5e38\u72b6\u6001\u540e\u4e0d\u8d85\u8fc710\u79d2\u65f6\u6267\u884c\u3002
                  \n\u5982\u679c\u5e94\u7b54\u7801\u6807\u8bc6\u4e3a\u6210\u529f(REP==X’00’)\uff0c\u5e76\u4e14\u8bf7\u6c42\u65e2\u4e0d\u662fBIND\u4e5f\u4e0d\u662fCONNECT\uff0c\u5219\u5ba2\u6237\u7aef\u53ef\u4ee5\u5f00\u59cb\u4f20\u8f93\u6570\u636e\u3002\u5982\u679c\u534f\u5546\u7684\u4f20\u8f93\u65b9\u5f0f\u5305\u542b\u5bf9\u4e8e\u6570\u636e\u5b8c\u6574\u6027\uff0c\u9274\u6743\u6216\u4fdd\u5bc6\u6027\u7684\u5c01\u88c5\u8981\u6c42\uff0c\u5176\u4f20\u8f93\u7684\u6570\u636e\u4e5f\u5e94\u6309\u6b64\u8981\u6c42\u5c01\u88c5\u3002\u7c7b\u4f3c\u64cd\u4f5c\u4e5f\u8bb8\u662f\u5b9e\u65bd\u4e8e\u53cd\u5411\u7684\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u3002<\/p>\n
                  7. UDP\u5ba2\u6237\u7aef\u7684\u64cd\u4f5c<\/h3>\n
                  \u4e00\u4e2aUDP\u5ba2\u6237\u7aef\u5fc5\u987b\u5c06\u81ea\u5df1\u7684\u6570\u636e\u62a5\u53d1\u9001\u81f3\u6307\u5b9a\u7684UDP\u4e2d\u7ee7\u670d\u52a1\u5668\uff0c\u5176\u7aef\u53e3\u53f7\u662f\u5728UDP ASSOCIATE\u5e94\u7b54\u4e2d\u7531BND.PORT\u5b57\u6bb5\u6307\u5b9a\u7684\u7aef\u53e3\u53f7\u3002\u5176\u6570\u636e\u62a5\u4e2d\u9274\u6743\u3001\u4e00\u81f4\u6027\u53ca\u52a0\u5bc6\u6027\u5c01\u88c5\u5fc5\u987b\u4e0e\u534f\u5546\u65f6\u8868\u660e\u7684\u76f8\u540c\u3002\u6bcf\u4e2aUDP\u6570\u636e\u62a5\u5305\u542b\u4e00\u4e2aUDP\u8bf7\u6c42\u5934\uff1a<\/p>\n
                  \n      +----+------+------+----------+----------+----------+\n      |RSV | FRAG | ATYP | DST.ADDR | DST.PORT |   DATA   |\n      +----+------+------+----------+----------+----------+\n      | 2  |  1   |  1   | Variable |    2     | Variable |\n      +----+------+------+----------+----------+----------+\n<\/pre>\n
                  \u8be5\u8bf7\u6c42\u5934\u4e2d\u5305\u542b\u7684\u5b57\u6bb5\u4e3a\uff1a<\/p>\n
                    \n
                  • RSV\uff1a\u4fdd\u7559\u5b57\u6bb5 X’0000′<\/li>\n
                  • FRAG\uff1a\u5f53\u524d\u5206\u6bb5\u53f7<\/li>\n
                  • ATYP\uff1a\u4e0b\u8ff0\u5730\u5740\u7c7b\u578b\uff1a\n
                      \n
                    • IPV4\u5730\u5740\uff1a X’01’<\/li>\n
                    • \u57df\u540d\uff1aX’03’<\/li>\n
                    • IPV6\u5730\u5740\uff1aX’04’<\/li>\n<\/ul>\n<\/li>\n
                    • DST.ADDR\uff1a\u671f\u671b\u7684\u76ee\u6807\u5730\u5740<\/li>\n
                    • DST.PORT\uff1a\u671f\u671b\u7684\u76ee\u6807\u7aef\u53e3\u53f7<\/li>\n
                    • DATA\uff1a\u7528\u6237\u6570\u636e<\/li>\n<\/ul>\n
                      \u5f53\u4e00\u4e2aUDP\u4e2d\u7ee7\u670d\u52a1\u5668\u51b3\u5b9a\u4e2d\u7ee7\u4e00\u4e2aUDP\u6570\u636e\u62a5\u65f6\uff0c\u5b83\u9759\u9ed8\u5730\u6267\u884c\u4e0a\u8ff0\u64cd\u4f5c\uff0c\u4e0d\u901a\u77e5\u4efb\u4f55\u5ba2\u6237\u7aef\u3002\u7c7b\u4f3c\u7684\uff0c\u5b83\u4f1a\u4e22\u5f03\u5b83\u65e0\u6cd5\u4e2d\u7ee7\u7684\u6570\u636e\u62a5\u3002\u5f53\u4e00\u4e2aUDP\u4e2d\u7ee7\u670d\u52a1\u5668\u6536\u5230\u8fdc\u7a0b\u4e3b\u673a\u4f20\u6765\u7684\u5e94\u7b54\u6570\u636e\u62a5\u65f6\uff0c\u5b83\u5fc5\u987b\u4f7f\u7528\u4e0a\u8ff0\u62a5\u5934\u683c\u5f0f\u5c01\u88c5\u6570\u636e\u62a5\uff0c\u82e5\u6709\u5fc5\u8981\u540c\u65f6\u5c06\u4f9d\u636e\u4e4b\u524d\u534f\u5546\u7684\u9274\u6743\u65b9\u6cd5\u518d\u5c01\u88c5\u3002
                      \nUDP\u4e2d\u7ee7\u670d\u52a1\u5668\u5fc5\u987b\u4eceSOCKS\u670d\u52a1\u5668\u4e2d\u83b7\u53d6\u5ba2\u6237\u7aef\u671f\u671b\u53d1\u9001\u6570\u636e\u62a5\u7684IP\u5730\u5740\uff0c\u5ba2\u6237\u7aef\u7528\u8be5\u5730\u5740\u52a0\u4e0aUDP ASSOCIATE\u5e94\u7b54\u4e2d\u63d0\u53ca\u7684BND.PORT\u6765\u53d1\u9001\u6570\u636e\u62a5\u3002\u5b83\u5fc5\u987b\u4e22\u5f03\u4efb\u4f55\u5728\u5173\u8054\u4e4b\u5916\u7684\uff0c\u4ece\u6e90IP\u5730\u5740\u4f20\u8f93\u8fc7\u6765\u7684\u6570\u636e\u62a5\u3002
                      \nFRAG\u5b57\u6bb5\u8868\u660e\u4e86\u8fd9\u4e2a\u6570\u636e\u62a5\u662f\u4e0d\u662f\u6570\u636e\u62a5\u6bb5\u4e2d\u7684\u4e00\u90e8\u5206\u3002\u5982\u679c\u5206\u6bb5\u5b9e\u65bd\uff0c\u5219\u6700\u9ad8\u9636\u7684\u4f4d(bit)\u8868\u660e\u662f\u5426\u5206\u6bb5\u7ed3\u675f\uff0c\u503cX’00’\u8868\u660e\u8fd9\u662f\u4e2a\u72ec\u7acb\u7684\u6570\u636e\u62a5\u3002\u57281\u4e0e127\u4e4b\u95f4\u7684\u6570\u503c\u8868\u660e\u8fd9\u4e2a\u6570\u636e\u62a5\u5728\u5206\u6bb5\u4e2d\u7684\u987a\u5e8f\u3002\u6bcf\u4e2a\u63a5\u6536\u8005\u5fc5\u987b\u5b9e\u73b0\u4e00\u4e2a\u4e0e\u4e4b\u5173\u8054\u7684REASSEMBLY QUEUE\uff08\u91cd\u7ec4\u961f\u5217\uff09\u4e0eREASSEMBLY TIMER\uff08\u91cd\u7ec4\u8ba1\u65f6\u5668\uff09\u3002\u91cd\u7ec4\u961f\u5217\u5fc5\u987b\u5728\u8ba1\u65f6\u5668\u8d85\u65f6\u65f6\uff0c\u4ea6\u6216\u662f\u4f20\u5165\u6570\u636e\u62a5FRAG\u5b57\u6bb5\u503c\u5c0f\u4e8e\u5f53\u524d\u6700\u5927\u5b57\u6bb5\u503c\u65f6\uff0c\u4e22\u5f03\u90a3\u4e9b\u5c1a\u672a\u7ec4\u5408\u6210\u529f\u7684\u6570\u636e\u62a5\uff0c\u5e76\u4e14\u91cd\u65b0\u521d\u59cb\u5316\u3002\u91cd\u7ec4\u8ba1\u65f6\u5668\u5fc5\u987b\u8bbe\u7f6e\u4e0d\u8d85\u8fc75\u79d2\u7684\u8d85\u65f6\u503c\u3002\u4e00\u822c\u5efa\u8bae\uff0c\u53ea\u8981\u6761\u4ef6\u5141\u8bb8\uff0c\u4e0d\u542f\u7528\u5206\u6bb5\u3002
                      \n\u5206\u6bb5\u7684\u5b9e\u65bd\u65f6\u53ef\u9009\u7684\uff1b\u4e00\u4e2a\u4e0d\u5141\u8bb8\u5206\u6bb5\u64cd\u4f5c\u7684\u5b9e\u73b0\uff0c\u5b83\u5fc5\u987b\u4e22\u5f03\u4efb\u4f55FRAG\u503c\u4e0d\u4e3aX’00’\u7684\u4efb\u4f55\u6570\u636e\u62a5\u3002
                      \n\u4e00\u4e2aSOCKS-\u53ef\u611f\u77e5\u7684UDP\u7a0b\u5e8f\u63a5\u53e3\u5fc5\u987b\u62a5\u544a\u4e00\u4e2a\u53ef\u7528\u7684UDP\u6570\u636e\u62a5\u7f13\u5b58\u957f\u5ea6\uff0c\u4e14\u5176\u5fc5\u987b\u5c0f\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u5141\u8bb8\u7684\u7a7a\u95f4\uff1a<\/p>\n
                        \n
                      • \u82e5ATYP==X’01’\u00a0 < 10 + method_dependent \u5b57\u8282<\/li>\n
                      • \u82e5ATYP==X’03’ : < 262 + method_dependent \u5b57\u8282<\/li>\n
                      • \u82e5ATYP==X’04’ : < 20 +\u00a0 method_dependent \u5b57\u8282<\/li>\n<\/ul>\n
                         <\/p>\n","protected":false},"excerpt":{"rendered":"
                        Reference:\u00a0https:\/\/www.ietf.org\/rfc\/rfc1928.txt \u53ea\u662f\u90e8\u5206\u7ae0\u8282\u7684\u7ffb\u8bd1 3. TCP\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u6d41\u7a0b \u5f53\u67d0\u4e00\u57fa\u4e8eTCP\u7684\u5ba2\u6237\u7aef\u60f3\u8981\u7ecf\u7531\u9632\u706b\u5899\uff08\u53d6\u51b3\u4e8e\u5177\u4f53\u5b9e\u73b0\uff09\u4e0e\u8fdc\u7aef\u5bf9\u8c61\u5efa\u7acb\u8fde\u63a5\u65f6\uff0c\u5b83\u5fc5\u987b\u9996\u5148\u5f00\u542f\u4e0eSOCKS\u670d\u52a1\u5668\u4e0a\u5bf9\u5e94\u7aef\u53e3\u7684TCP\u8fde\u63a5\u3002\u901a\u5e38\u60c5\u51b5\u4e0bSOCKS\u670d\u52a1\u5668\u76d1\u542c\u7684TCP\u7aef\u53e3\u53f7\u662f1080. \u82e5\u8fde\u63a5\u8bf7\u6c42\u6210\u529f\uff0c\u5ba2\u6237\u7aef\u5c06\u8fdb\u5165\u6388\u6743\u6a21\u5f0f\u534f\u5546\u9636\u6bb5\uff0c\u968f\u540e\u4f7f\u7528\u6240\u9009\u7684\u6a21\u5f0f\u8fdb\u884c\u6388\u6743\uff0c\u7ee7\u800c\u5f00\u59cb\u8fde\u63a5\u3002SOCKS\u670d\u52a1\u5668\u5bf9\u8bf7\u6c42\u8fdb\u884c\u8bc4\u4f30\uff0c\u7ee7\u800c\u5efa\u7acb\u6307\u5b9a\u7684\u8fde\u63a5\u6216\u62d2\u7edd\u8fde\u63a5\u3002 \u9664\u975e\u53e6\u6709\u8bf4\u660e\uff0c\u4e0b\u6587\u6570\u636e\u62a5\u4e2d\u63d0\u53ca\u7684\u5341\u8fdb\u5236\u6570\u5b57\u5747\u4e3a\u5bf9\u5e94\u5b57\u6bb5\u7684\u5b57\u8282\u957f\u5ea6\u3002\u5f53\u67d0\u4e2a\u5b57\u8282\u5fc5\u987b\u662f\u4e00\u4e2a\u5177\u4f53\u6570\u503c\u65f6\uff0c\u4ee5X’hh’\u6765\u8868\u793a\u8fd9\u4e00\u5b57\u6bb5\u7684\u5177\u4f53\u503c\u3002\u5f53\u4f7f\u7528’Variable'(\u53ef\u53d8\u957f)\u65f6\uff0c\u8868\u793a\u8fd9\u4e00\u5b57\u6bb5\u62e5\u6709\u53ef\u53d8\u957f\u5ea6\u7684\u5185\u5bb9\uff0c\u5177\u4f53\u957f\u5ea6\u901a\u8fc7\u4e00\u4e2a\u5173\u8054\u7684\u957f\u5ea6\u5b57\u6bb5\u8868\u793a\uff0c\u6216\u6839\u636e\u67d0\u949f\u5177\u4f53\u7684\u6570\u636e\u7c7b\u578b\u5b57\u6bb5\u51b3\u5b9a\u3002 \u5ba2\u6237\u7aef\u8fde\u63a5\u81f3\u670d\u52a1\u5668\u5e76\u53d1\u9001\u4e00\u4e2a\u6807\u8bc6\u7b26\/\u65b9\u6cd5\u9009\u62e9\u4fe1\u606f\uff1a +—-+———-+———-+ |VER | NMETHODS | METHODS | +—-+———-+———-+ | 1 | 1 | 1 to 255 | +—-+———-+———-+ \u5176\u4e2d\uff0c\u5b57\u6bb5VER\u8bbe\u7f6e\u4e3aX’05’\u4ee5\u8868\u660e\u6b64\u534f\u8bae\u7684\u7248\u672c\u3002NMETHODS\u5b57\u6bb5\u5305\u542b\u4e86METHODS\u5b57\u6bb5\u4e2d\u6240\u586b\u9274\u6743\u65b9\u6cd5(method)\u7684\u4e2a\u6570\uff0c\u4ee5\u5b57\u8282\u4e3a\u957f\u5ea6\u5355\u4f4d\u2014\u2014METHODS\u4e2d\u7684\u4e00\u4e2a\u65b9\u6cd5\u6807\u8bc6\u7b26\u5360\u4e00\u4e2a\u5b57\u8282\u3002 \u670d\u52a1\u5668\u4eceMETHODS\u7ed9\u5b9a\u7684\u65b9\u6cd5\u4e2d\u9009\u62e9\u4e00\u79cd\uff0c\u56de\u4f20\u4e00\u4e2a\u65b9\u6cd5\u9009\u62e9\u6d88\u606f\uff1a +—-+——–+ |VER | METHOD | +—-+——–+ | 1 | 1 | +—-+——–+ \u5982\u679c\u9009\u62e9\u7684\u65b9\u6cd5\u503c\u4e3aX’FF’\uff0c\u5219\u8868\u660e\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u5ba2\u6237\u7aef\u80fd\u63d0\u4f9b\u7684\u4efb\u4e00\u79cd\u9274\u6743\u65b9\u6cd5\uff0c\u5ba2\u6237\u7aef\u5fc5\u987b\u5728\u6536\u5230\u6b64\u6d88\u606f\u540e\u65ad\u5f00\u8fde\u63a5\u3002 METHOD\u4e2d\u53ef\u4ee5\u5b9a\u4e49\u7684\u65b9\u6cd5\u4e3a\uff1a X’00’ \u65e0\u9700\u9274\u6743\u65b9\u6cd5 X’01’ GSSAPI X’02’ \u7528\u6237\u540d\/\u5bc6\u7801 X’03’ \u81f3 X’7F’ IANA\u6307\u5b9a X’80’ \u81f3 X’FE’ […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-2492","post","type-post","status-publish","format-standard","hentry","category-study"],"_links":{"self":[{"href":"https:\/\/dayandcarrot.space\/index.php?rest_route=\/wp\/v2\/posts\/2492","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dayandcarrot.space\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dayandcarrot.space\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dayandcarrot.space\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dayandcarrot.space\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2492"}],"version-history":[{"count":0,"href":"https:\/\/dayandcarrot.space\/index.php?rest_route=\/wp\/v2\/posts\/2492\/revisions"}],"wp:attachment":[{"href":"https:\/\/dayandcarrot.space\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2492"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dayandcarrot.space\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2492"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dayandcarrot.space\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2492"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}