{"id":77520,"date":"2024-01-15T23:53:46","date_gmt":"2024-01-15T15:53:46","guid":{"rendered":"\/\/www.dealsbon.com\/?p=77520"},"modified":"2024-01-15T23:53:46","modified_gmt":"2024-01-15T15:53:46","slug":"tssmys","status":"publish","type":"post","link":"\/\/www.dealsbon.com\/blog\/77520.html","title":{"rendered":"TCP FIN\u662f\u4ec0\u4e48\u610f\u601d"},"content":{"rendered":"

  \u4eca\u5929\u6211\u4eec\u5c06\u4ecb\u7ecdTCP\u534f\u8bae\u4e2d\u7684FIN\u6807\u5fd7\u7684\u542b\u4e49\u53ca\u5176\u76f8\u5173\u77e5\u8bc6\u3002<\/p>\n

1. TCP\u8fde\u63a5\u7684\u5173\u95ed\u8fc7\u7a0b<\/h2>\n

  TCP\u8fde\u63a5\u7684\u5efa\u7acb<\/h3>\n

  \u5728\u8fdb\u884cTCP\u8fde\u63a5\u65f6\uff0c\u901a\u4fe1\u53cc\u65b9\u9996\u5148\u8981\u8fdb\u884c\u4e09\u6b21\u63e1\u624b\u4ee5\u5efa\u7acb\u8fde\u63a5\u3002\u63e1\u624b\u5b8c\u6210\u540e\uff0c\u6570\u636e\u4f20\u8f93\u5c31\u53ef\u4ee5\u5f00\u59cb\u3002<\/p>\n

  TCP\u8fde\u63a5\u7684\u5173\u95ed<\/h3>\n

  \u5f53\u6570\u636e\u4f20\u8f93\u7ed3\u675f\u540e\uff0c\u901a\u4fe1\u53cc\u65b9\u9700\u8981\u8fdb\u884c\u56db\u6b21\u6325\u624b\u6765\u5173\u95ed\u8fde\u63a5\u3002\u5176\u4e2d\uff0cTCP FIN\u7684\u4f5c\u7528\u5c31\u4f53\u73b0\u5728\u8fde\u63a5\u5173\u95ed\u8fc7\u7a0b\u4e2d\u3002<\/p>\n

  \u7b2c\u4e00\u6b21\u6325\u624b\uff1a\u53d1\u9001\u65b9\u53d1\u51faFIN<\/h4>\n

  \u5f53\u4e00\u65b9\u51b3\u5b9a\u5173\u95ed\u8fde\u63a5\u65f6\uff0c\u5b83\u4f1a\u53d1\u9001\u4e00\u4e2aFIN\uff08Finish\uff09\u6807\u5fd7\u7ed9\u5bf9\u65b9\uff0c\u8868\u793a\u81ea\u5df1\u5df2\u7ecf\u6ca1\u6709\u6570\u636e\u8981\u53d1\u9001\u4e86\uff0c\u4f46\u4ecd\u53ef\u4ee5\u63a5\u6536\u6570\u636e\u3002<\/p>\n

  \u7b2c\u4e8c\u6b21\u6325\u624b\uff1a\u63a5\u6536\u65b9\u54cd\u5e94ACK<\/h4>\n

  \u63a5\u6536\u5230FIN\u7684\u4e00\u65b9\u4f1a\u53d1\u9001\u4e00\u4e2a\u786e\u8ba4ACK\uff08Acknowledgement\uff09\u6807\u5fd7\u56de\u590d\uff0c\u8868\u793a\u5df2\u7ecf\u63a5\u6536\u5230\u4e86\u5173\u95ed\u8bf7\u6c42\u3002<\/p>\n

  \u7b2c\u4e09\u6b21\u6325\u624b\uff1a\u63a5\u6536\u65b9\u53d1\u9001FIN<\/h4>\n

  \u5f85\u53d1\u9001\u65b9\u786e\u8ba4\u63a5\u6536\u5230ACK\u540e\uff0c\u5728\u5b8c\u6210\u81ea\u5df1\u5269\u4f59\u7684\u6570\u636e\u53d1\u9001\u540e\uff0c\u4e5f\u4f1a\u53d1\u9001\u4e00\u4e2aFIN\u7ed9\u63a5\u6536\u65b9\u3002<\/p>\n

  \u7b2c\u56db\u6b21\u6325\u624b\uff1a\u53d1\u9001\u65b9\u54cd\u5e94ACK<\/h4>\n

  \u63a5\u6536\u5230\u6700\u540e\u7684FIN\u540e\uff0c\u63a5\u6536\u65b9\u4f1a\u56de\u590d\u4e00\u4e2aACK\uff0c\u8868\u793a\u81ea\u5df1\u4e5f\u5b8c\u6210\u4e86\u6570\u636e\u7684\u53d1\u9001\uff0c\u8fde\u63a5\u53ef\u4ee5\u5173\u95ed\u3002<\/p>\n

2. TCP FIN\u7684\u4f5c\u7528<\/h2>\n

  \u6b63\u786e\u4f7f\u7528TCP FIN\u7684\u91cd\u8981\u6027<\/h3>\n

  \u5728\u7f51\u7edc\u901a\u4fe1\u4e2d\uff0c\u6b63\u786e\u4f7f\u7528\u548c\u7406\u89e3TCP FIN\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u5b83\u80fd\u591f\u4fdd\u8bc1\u6570\u636e\u7684\u53ef\u9760\u4f20\u8f93\uff0c\u540c\u65f6\u4e5f\u6709\u52a9\u4e8e\u53ca\u65f6\u91ca\u653e\u88ab\u5360\u7528\u7684\u8d44\u6e90\u3002<\/p>\n

  \u4e0e\u5176\u4ed6TCP\u6807\u5fd7\u7684\u5173\u7cfb<\/h3>\n

  \u9664\u4e86FIN\u5916\uff0cTCP\u8fd8\u6709SYN\u3001ACK\u3001RST\u7b49\u4e0d\u540c\u7684\u6807\u5fd7\uff0c\u5b83\u4eec\u5728\u4e0d\u540c\u9636\u6bb5\u7684\u8fde\u63a5\u5efa\u7acb\u548c\u5173\u95ed\u8fc7\u7a0b\u4e2d\u53d1\u6325\u4e0d\u540c\u7684\u4f5c\u7528\u3002<\/p>\n

3. \u603b\u7ed3<\/h2>\n

  TCP FIN\u610f\u4e49\u91cd\u5927<\/h3>\n

  TCP FIN\u6807\u5fd7\u5728\u7f51\u7edc\u901a\u4fe1\u4e2d\u626e\u6f14\u7740\u91cd\u8981\u7684\u89d2\u8272\uff0c\u5b83\u6807\u5fd7\u7740\u6570\u636e\u4f20\u8f93\u7684\u7ed3\u675f\u548c\u8fde\u63a5\u7684\u5173\u95ed\uff0c\u786e\u4fdd\u4e86\u6570\u636e\u7684\u5b8c\u6574\u6027\u548c\u901a\u4fe1\u8d44\u6e90\u7684\u91ca\u653e\u3002<\/p>\n

  \u91cd\u89c6TCP\u534f\u8bae\u7684\u7ec6\u8282<\/h3>\n

  \u5728\u7f51\u7edc\u901a\u4fe1\u4e2d\uff0c\u8981\u6ce8\u610fTCP\u534f\u8bae\u7ec6\u8282\u7684\u5dee\u5f02\uff0c\u6b63\u786e\u7406\u89e3\u5e76\u4f7f\u7528\u5404\u79cd\u6807\u5fd7\uff0c\u53ef\u4ee5\u63d0\u9ad8\u901a\u4fe1\u7684\u6548\u7387\u548c\u53ef\u9760\u6027\u3002<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

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