{"id":11562,"date":"2025-07-25T11:09:31","date_gmt":"2025-07-25T03:09:31","guid":{"rendered":"https:\/\/egonlin.com\/?p=11562"},"modified":"2025-07-25T11:42:17","modified_gmt":"2025-07-25T03:42:17","slug":"tcp%e5%85%b6%e5%ae%9e%e4%b8%89%e6%ac%a1%e6%8c%a5%e6%89%8b%e4%b9%9f%e5%8f%af%e4%bb%a5%e6%96%ad%e9%93%be%e6%8e%a5","status":"publish","type":"post","link":"https:\/\/egonlin.com\/?p=11562","title":{"rendered":"tcp\u5176\u5b9e\u4e09\u6b21\u6325\u624b\u4e5f\u53ef\u4ee5\u65ad\u94fe\u63a5"},"content":{"rendered":"

tcp\u5176\u5b9e\u4e09\u6b21\u6325\u624b\u4e5f\u53ef\u4ee5\u65ad\u94fe\u63a5\uff0c\u5e76\u4e0d\u4e00\u5b9a\u975e\u8981\u56db\u6b21\uff01\uff01\uff01<\/span><\/strong><\/p>\n

\u867d\u7136\u6211\u4eec\u5728\u5b66\u4e60 TCP \u6325\u624b\u65f6\uff0c\u5b66\u5230\u7684\u662f\u9700\u8981\u56db\u6b21\u6765\u5b8c\u6210 TCP \u6325\u624b\uff0c\u4f46\u662f\u5728\u4e00\u4e9b\u60c5\u51b5\u4e0b\uff0c TCP \u56db\u6b21\u6325\u624b\u662f\u53ef\u4ee5\u53d8\u6210 TCP \u4e09\u6b21\u6325\u624b\u7684\u3002<\/p>\n

\"\"<\/div><\/p>\n

\u800c\u4e14\u5728\u7528 wireshark \u5de5\u5177\u6293\u5305\u7684\u65f6\u5019\uff0c\u6211\u4eec\u4e5f\u4f1a\u5e38\u770b\u5230 TCP \u6325\u624b\u8fc7\u7a0b\u662f\u4e09\u6b21\uff0c\u800c\u4e0d\u662f\u56db\u6b21\uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n

\"\"<\/div><\/p>\n

\u5148\u6765\u56de\u7b54\u4e3a\u4ec0\u4e48 RFC \u6587\u6863\u91cc\u5b9a\u4e49 TCP \u6325\u624b\u8fc7\u7a0b\u662f\u8981\u56db\u6b21\uff1f<\/p>\n

\u518d\u6765\u56de\u7b54\u4ec0\u4e48\u60c5\u51b5\u4e0b\uff0c\u4ec0\u4e48\u60c5\u51b5\u4f1a\u51fa\u73b0\u4e09\u6b21\u6325\u624b\uff1f<\/p>\n

\u4e3a\u4ec0\u4e48 TCP \u6325\u624b\u9700\u8981\u56db\u6b21\uff1f<\/h3>\n

TCP \u56db\u6b21\u6325\u624b\u7684\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n

\"\"<\/div><\/p>\n

\u5177\u4f53\u8fc7\u7a0b\uff1a<\/p>\n

    \n
  • \u5ba2\u6237\u7aef\u4e3b\u52a8\u8c03\u7528\u5173\u95ed\u8fde\u63a5\u7684\u51fd\u6570\uff0c\u4e8e\u662f\u5c31\u4f1a\u53d1\u9001 FIN \u62a5\u6587\uff0c\u8fd9\u4e2a \u00a0FIN \u62a5\u6587\u4ee3\u8868\u5ba2\u6237\u7aef\u4e0d\u4f1a\u518d\u53d1\u9001\u6570\u636e\u4e86\uff0c\u8fdb\u5165 FIN_WAIT_1 \u72b6\u6001\uff1b<\/li>\n
  • \u670d\u52a1\u7aef\u6536\u5230\u4e86 FIN \u62a5\u6587\uff0c\u7136\u540e\u9a6c\u4e0a\u56de\u590d\u4e00\u4e2a ACK \u786e\u8ba4\u62a5\u6587\uff0c\u6b64\u65f6\u670d\u52a1\u7aef\u8fdb\u5165 CLOSE_WAIT \u72b6\u6001\u3002\u5728\u6536\u5230 FIN \u62a5\u6587\u7684\u65f6\u5019\uff0cTCP \u534f\u8bae\u6808\u4f1a\u4e3a FIN \u5305\u63d2\u5165\u4e00\u4e2a\u6587\u4ef6\u7ed3\u675f\u7b26 EOF \u5230\u63a5\u6536\u7f13\u51b2\u533a\u4e2d\uff0c\u670d\u52a1\u7aef\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7 read \u8c03\u7528\u6765\u611f\u77e5\u8fd9\u4e2a FIN \u5305\uff0c\u8fd9\u4e2a EOF \u4f1a\u88ab\u653e\u5728\u5df2\u6392\u961f\u7b49\u5019\u7684\u5176\u4ed6\u5df2\u63a5\u6536\u7684\u6570\u636e\u4e4b\u540e\uff0c\u6240\u4ee5\u5fc5\u987b\u8981\u5f97\u7ee7\u7eed read \u63a5\u6536\u7f13\u51b2\u533a\u5df2\u63a5\u6536\u7684\u6570\u636e\uff1b<\/li>\n
  • \u63a5\u7740\uff0c\u5f53\u670d\u52a1\u7aef\u5728 read \u6570\u636e\u7684\u65f6\u5019\uff0c\u6700\u540e\u81ea\u7136\u5c31\u4f1a\u8bfb\u5230 EOF\uff0c\u63a5\u7740read() \u5c31\u4f1a\u8fd4\u56de 0\uff0c\u8fd9\u65f6\u670d\u52a1\u7aef\u5e94\u7528\u7a0b\u5e8f\u5982\u679c\u6709\u6570\u636e\u8981\u53d1\u9001\u7684\u8bdd\uff0c\u5c31\u53d1\u5b8c\u6570\u636e\u540e\u624d\u8c03\u7528\u5173\u95ed\u8fde\u63a5\u7684\u51fd\u6570\uff0c\u5982\u679c\u670d\u52a1\u7aef\u5e94\u7528\u7a0b\u5e8f\u6ca1\u6709\u6570\u636e\u8981\u53d1\u9001\u7684\u8bdd\uff0c\u53ef\u4ee5\u76f4\u63a5\u8c03\u7528\u5173\u95ed\u8fde\u63a5\u7684\u51fd\u6570\uff0c\u8fd9\u65f6\u670d\u52a1\u7aef\u5c31\u4f1a\u53d1\u4e00\u4e2a FIN \u5305\uff0c\u8fd9\u4e2a \u00a0FIN \u62a5\u6587\u4ee3\u8868\u670d\u52a1\u7aef\u4e0d\u4f1a\u518d\u53d1\u9001\u6570\u636e\u4e86\uff0c\u4e4b\u540e\u5904\u4e8e LAST_ACK \u72b6\u6001\uff1b<\/li>\n
  • \u5ba2\u6237\u7aef\u63a5\u6536\u5230\u670d\u52a1\u7aef\u7684 FIN \u5305\uff0c\u5e76\u53d1\u9001 ACK \u786e\u8ba4\u5305\u7ed9\u670d\u52a1\u7aef\uff0c\u6b64\u65f6\u5ba2\u6237\u7aef\u5c06\u8fdb\u5165 TIME_WAIT \u72b6\u6001\uff1b<\/li>\n
  • \u670d\u52a1\u7aef\u6536\u5230 ACK \u786e\u8ba4\u5305\u540e\uff0c\u5c31\u8fdb\u5165\u4e86\u6700\u540e\u7684 CLOSE \u72b6\u6001\uff1b<\/li>\n
  • \u5ba2\u6237\u7aef\u7ecf\u8fc7 2MSL \u65f6\u95f4\u4e4b\u540e\uff0c\u4e5f\u8fdb\u5165 CLOSE \u72b6\u6001\uff1b<\/li>\n<\/ul>\n

    \u4f60\u53ef\u4ee5\u770b\u5230\uff0c\u6bcf\u4e2a\u65b9\u5411\u90fd\u9700\u8981\u4e00\u4e2a FIN \u548c\u4e00\u4e2a ACK\uff0c\u56e0\u6b64\u901a\u5e38\u88ab\u79f0\u4e3a\u56db\u6b21\u6325\u624b\u3002<\/p>\n

    \u4e3a\u4ec0\u4e48 TCP \u6325\u624b\u9700\u8981\u56db\u6b21\u5462\uff1f<\/h4>\n

    \u670d\u52a1\u5668\u6536\u5230\u5ba2\u6237\u7aef\u7684 FIN \u62a5\u6587\u65f6\uff0c\u5185\u6838\u4f1a\u9a6c\u4e0a\u56de\u4e00\u4e2a ACK \u5e94\u7b54\u62a5\u6587\uff0c\u4f46\u662f\u670d\u52a1\u7aef\u5e94\u7528\u7a0b\u5e8f\u53ef\u80fd\u8fd8\u6709\u6570\u636e\u8981\u53d1\u9001\uff0c\u6240\u4ee5\u5e76\u4e0d\u80fd\u9a6c\u4e0a\u53d1\u9001 FIN \u62a5\u6587\uff0c\u800c\u662f\u5c06\u53d1\u9001 FIN \u62a5\u6587\u7684\u63a7\u5236\u6743\u4ea4\u7ed9\u670d\u52a1\u7aef\u5e94\u7528\u7a0b\u5e8f\uff1a<\/p>\n

    \u5982\u679c\u670d\u52a1\u7aef\u5e94\u7528\u7a0b\u5e8f\u6709\u6570\u636e\u8981\u53d1\u9001\u7684\u8bdd\uff0c\u5c31\u53d1\u5b8c\u6570\u636e\u540e\uff0c\u624d\u8c03\u7528\u5173\u95ed\u8fde\u63a5\u7684\u51fd\u6570\uff1b<\/p>\n

    \u5982\u679c\u670d\u52a1\u7aef\u5e94\u7528\u7a0b\u5e8f\u6ca1\u6709\u6570\u636e\u8981\u53d1\u9001\u7684\u8bdd\uff0c\u53ef\u4ee5\u76f4\u63a5\u8c03\u7528\u5173\u95ed\u8fde\u63a5\u7684\u51fd\u6570\uff0c<\/p>\n

    \u4ece\u4e0a\u9762\u8fc7\u7a0b\u53ef\u77e5\uff0c\u662f\u5426\u8981\u53d1\u9001\u7b2c\u4e09\u6b21\u6325\u624b\u7684\u63a7\u5236\u6743\u4e0d\u5728\u5185\u6838\uff0c\u800c\u662f\u5728\u88ab\u52a8\u5173\u95ed\u65b9\uff08\u4e0a\u56fe\u7684\u670d\u52a1\u7aef\uff09\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u56e0\u4e3a\u5e94\u7528\u7a0b\u5e8f\u53ef\u80fd\u8fd8\u6709\u6570\u636e\u8981\u53d1\u9001\uff0c\u7531\u5e94\u7528\u7a0b\u5e8f\u51b3\u5b9a\u4ec0\u4e48\u65f6\u5019\u8c03\u7528\u5173\u95ed\u8fde\u63a5\u7684\u51fd\u6570\uff0c\u5f53\u8c03\u7528\u4e86\u5173\u95ed\u8fde\u63a5\u7684\u51fd\u6570\uff0c\u5185\u6838\u5c31\u4f1a\u53d1\u9001 FIN \u62a5\u6587\u4e86\uff0c\u6240\u4ee5\u670d\u52a1\u7aef\u7684 ACK \u548c FIN \u4e00\u822c\u90fd\u4f1a\u5206\u5f00\u53d1\u9001\u3002<\/p>\n

    FIN \u62a5\u6587\u4e00\u5b9a\u5f97\u8c03\u7528\u5173\u95ed\u8fde\u63a5\u7684\u51fd\u6570\uff0c\u624d\u4f1a\u53d1\u9001\u5417\uff1f<\/p>\n

     <\/p>\n

    \u4e0d\u4e00\u5b9a\u3002<\/p>\n

    \u5982\u679c\u8fdb\u7a0b\u9000\u51fa\u4e86\uff0c\u4e0d\u7ba1\u662f\u4e0d\u662f\u6b63\u5e38\u9000\u51fa\uff0c\u8fd8\u662f\u5f02\u5e38\u9000\u51fa\uff08\u5982\u8fdb\u7a0b\u5d29\u6e83\uff09\uff0c\u5185\u6838\u90fd\u4f1a\u53d1\u9001 FIN \u62a5\u6587\uff0c\u4e0e\u5bf9\u65b9\u5b8c\u6210\u56db\u6b21\u6325\u624b\u3002<\/p>\n

    \u7c97\u66b4\u5173\u95ed vs \u4f18\u96c5\u5173\u95ed<\/h4>\n

    \u524d\u9762\u4ecb\u7ecd TCP \u56db\u6b21\u6325\u624b\u7684\u65f6\u5019\uff0c\u5e76\u6ca1\u6709\u8be6\u7ec6\u4ecb\u7ecd\u5173\u95ed\u8fde\u63a5\u7684\u51fd\u6570\uff0c\u5176\u5b9e\u5173\u95ed\u7684\u8fde\u63a5\u7684\u51fd\u6570\u6709\u4e24\u79cd\u51fd\u6570\uff1a<\/p>\n

      \n
    • close \u51fd\u6570\uff0c\u540c\u65f6 socket \u5173\u95ed\u53d1\u9001\u65b9\u5411\u548c\u8bfb\u53d6\u65b9\u5411\uff0c\u4e5f\u5c31\u662f socket \u4e0d\u518d\u6709\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u7684\u80fd\u529b\uff1b<\/li>\n
    • shutdown \u51fd\u6570\uff0c\u53ef\u4ee5\u6307\u5b9a socket \u53ea\u5173\u95ed\u53d1\u9001\u65b9\u5411\u800c\u4e0d\u5173\u95ed\u8bfb\u53d6\u65b9\u5411\uff0c\u4e5f\u5c31\u662f socket \u4e0d\u518d\u6709\u53d1\u9001\u6570\u636e\u7684\u80fd\u529b\uff0c\u4f46\u662f\u8fd8\u662f\u5177\u6709\u63a5\u6536\u6570\u636e\u7684\u80fd\u529b\uff1b<\/li>\n<\/ul>\n

      \u5982\u679c\u5ba2\u6237\u7aef\u662f\u7528 close \u51fd\u6570\u6765\u5173\u95ed\u8fde\u63a5\uff0c\u90a3\u4e48\u5728 TCP \u56db\u6b21\u6325\u624b\u8fc7\u7a0b\u4e2d\uff0c\u5982\u679c\u6536\u5230\u4e86\u670d\u52a1\u7aef\u53d1\u9001\u7684\u6570\u636e\uff0c\u7531\u4e8e\u5ba2\u6237\u7aef\u5df2\u7ecf\u4e0d\u518d\u5177\u6709\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u7684\u80fd\u529b\uff0c\u6240\u4ee5\u5ba2\u6237\u7aef\u7684\u5185\u6838\u4f1a\u56de RST \u62a5\u6587\u7ed9\u670d\u52a1\u7aef\uff0c\u7136\u540e\u5185\u6838\u4f1a\u91ca\u653e\u8fde\u63a5\uff0c\u8fd9\u65f6\u5c31\u4e0d\u4f1a\u7ecf\u5386\u5b8c\u6210\u7684 TCP \u56db\u6b21\u6325\u624b\uff0c\u6240\u4ee5\u6211\u4eec\u5e38\u8bf4\uff0c\u8c03\u7528 close \u662f\u7c97\u66b4\u7684\u5173\u95ed\u3002<\/p>\n

      \"\"<\/div><\/p>\n

      \u5f53\u670d\u52a1\u7aef\u6536\u5230 RST \u540e\uff0c\u5185\u6838\u5c31\u4f1a\u91ca\u653e\u8fde\u63a5\uff0c\u5f53\u670d\u52a1\u7aef\u5e94\u7528\u7a0b\u5e8f\u518d\u6b21\u53d1\u8d77\u8bfb\u64cd\u4f5c\u6216\u8005\u5199\u64cd\u4f5c\u65f6\uff0c\u5c31\u80fd\u611f\u77e5\u5230\u8fde\u63a5\u5df2\u7ecf\u88ab\u91ca\u653e\u4e86\uff1a<\/p>\n

        \n
      • \u5982\u679c\u662f\u8bfb\u64cd\u4f5c\uff0c\u5219\u4f1a\u8fd4\u56de RST \u7684\u62a5\u9519\uff0c\u4e5f\u5c31\u662f\u6211\u4eec\u5e38\u89c1\u7684Connection reset by peer\u3002<\/li>\n
      • \u5982\u679c\u662f\u5199\u64cd\u4f5c\uff0c\u90a3\u4e48\u7a0b\u5e8f\u4f1a\u4ea7\u751f SIGPIPE \u4fe1\u53f7\uff0c\u5e94\u7528\u5c42\u4ee3\u7801\u53ef\u4ee5\u6355\u83b7\u5e76\u5904\u7406\u4fe1\u53f7\uff0c\u5982\u679c\u4e0d\u5904\u7406\uff0c\u5219\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u8fdb\u7a0b\u4f1a\u7ec8\u6b62\uff0c\u5f02\u5e38\u9000\u51fa\u3002<\/li>\n<\/ul>\n

        \u76f8\u5bf9\u7684\uff0cshutdown \u51fd\u6570\u56e0\u4e3a\u53ef\u4ee5\u6307\u5b9a\u53ea\u5173\u95ed\u53d1\u9001\u65b9\u5411\u800c\u4e0d\u5173\u95ed\u8bfb\u53d6\u65b9\u5411\uff0c\u6240\u4ee5\u5373\u4f7f\u5728 TCP \u56db\u6b21\u6325\u624b\u8fc7\u7a0b\u4e2d\uff0c\u5982\u679c\u6536\u5230\u4e86\u670d\u52a1\u7aef\u53d1\u9001\u7684\u6570\u636e\uff0c\u5ba2\u6237\u7aef\u4e5f\u662f\u53ef\u4ee5\u6b63\u5e38\u8bfb\u53d6\u5230\u8be5\u6570\u636e\u7684\uff0c\u7136\u540e\u5c31\u4f1a\u7ecf\u5386\u5b8c\u6574\u7684 TCP \u56db\u6b21\u6325\u624b\uff0c\u6240\u4ee5\u6211\u4eec\u5e38\u8bf4\uff0c\u8c03\u7528 shutdown \u662f\u4f18\u96c5\u7684\u5173\u95ed\u3002<\/p>\n

        \"\"<\/div><\/p>\n

        \u4f46\u662f\u6ce8\u610f\uff0cshutdown \u51fd\u6570\u4e5f\u53ef\u4ee5\u6307\u5b9a\u300c\u53ea\u5173\u95ed\u8bfb\u53d6\u65b9\u5411\uff0c\u800c\u4e0d\u5173\u95ed\u53d1\u9001\u65b9\u5411\u300d\uff0c\u4f46\u662f\u8fd9\u65f6\u5019\u5185\u6838\u662f\u4e0d\u4f1a\u53d1\u9001 FIN \u62a5\u6587\u7684\uff0c\u56e0\u4e3a\u53d1\u9001 FIN \u62a5\u6587\u662f\u610f\u5473\u7740\u6211\u65b9\u5c06\u4e0d\u518d\u53d1\u9001\u4efb\u4f55\u6570\u636e\uff0c\u800c\u00a0shutdown \u5982\u679c\u6307\u5b9a\u300c\u4e0d\u5173\u95ed\u53d1\u9001\u65b9\u5411\u300d\uff0c\u5c31\u610f\u5473\u7740 socket \u8fd8\u6709\u53d1\u9001\u6570\u636e\u7684\u80fd\u529b\uff0c\u6240\u4ee5\u5185\u6838\u5c31\u4e0d\u4f1a\u53d1\u9001 FIN\u3002<\/p>\n

        \u4ec0\u4e48\u60c5\u51b5\u4f1a\u51fa\u73b0\u4e09\u6b21\u6325\u624b\uff1f<\/h3>\n

        \u5f53\u88ab\u52a8\u5173\u95ed\u65b9\uff08\u4e0a\u56fe\u7684\u670d\u52a1\u7aef\uff09\u5728 TCP \u6325\u624b\u8fc7\u7a0b\u4e2d\uff0c\u300c\u6ca1\u6709\u6570\u636e\u8981\u53d1\u9001\u300d\u5e76\u4e14\u300c\u5f00\u542f\u4e86 TCP \u5ef6\u8fdf\u786e\u8ba4\u673a\u5236\u300d\uff0c\u90a3\u4e48\u7b2c\u4e8c\u548c\u7b2c\u4e09\u6b21\u6325\u624b\u5c31\u4f1a\u5408\u5e76\u4f20\u8f93\uff0c\u8fd9\u6837\u5c31\u51fa\u73b0\u4e86\u4e09\u6b21\u6325\u624b\u3002<\/p>\n

        \"\"<\/div><\/p>\n

        \u7136\u540e\u56e0\u4e3a TCP \u5ef6\u8fdf\u786e\u8ba4\u673a\u5236\u662f\u9ed8\u8ba4\u5f00\u542f\u7684\uff0c\u6240\u4ee5\u5bfc\u81f4\u6211\u4eec\u6293\u5305\u65f6\uff0c\u770b\u89c1\u4e09\u6b21\u6325\u624b\u7684\u6b21\u6570\u6bd4\u56db\u6b21\u6325\u624b\u8fd8\u591a\u3002<\/p>\n

        \u4ec0\u4e48\u662f \u00a0TCP \u5ef6\u8fdf\u786e\u8ba4\u673a\u5236\uff1f<\/h4>\n

        \u5f53\u53d1\u9001\u6ca1\u6709\u643a\u5e26\u6570\u636e\u7684 ACK\uff0c\u5b83\u7684\u7f51\u7edc\u6548\u7387\u4e5f\u662f\u5f88\u4f4e\u7684\uff0c\u56e0\u4e3a\u5b83\u4e5f\u6709 40 \u4e2a\u5b57\u8282\u7684 IP \u5934 \u548c TCP \u5934\uff0c\u4f46\u5374\u6ca1\u6709\u643a\u5e26\u6570\u636e\u62a5\u6587\u3002<\/p>\n

        \u4e3a\u4e86\u89e3\u51b3 ACK \u4f20\u8f93\u6548\u7387\u4f4e\u95ee\u9898\uff0c\u6240\u4ee5\u5c31\u884d\u751f\u51fa\u4e86\u00a0TCP \u5ef6\u8fdf\u786e\u8ba4\u3002<\/p>\n

        TCP \u5ef6\u8fdf\u786e\u8ba4\u7684\u7b56\u7565\uff1a<\/p>\n

          \n
        • \u5f53\u6709\u54cd\u5e94\u6570\u636e\u8981\u53d1\u9001\u65f6\uff0cACK \u4f1a\u968f\u7740\u54cd\u5e94\u6570\u636e\u4e00\u8d77\u7acb\u523b\u53d1\u9001\u7ed9\u5bf9\u65b9<\/li>\n
        • \u5f53\u6ca1\u6709\u54cd\u5e94\u6570\u636e\u8981\u53d1\u9001\u65f6\uff0cACK \u5c06\u4f1a\u5ef6\u8fdf\u4e00\u6bb5\u65f6\u95f4\uff0c\u4ee5\u7b49\u5f85\u662f\u5426\u6709\u54cd\u5e94\u6570\u636e\u53ef\u4ee5\u4e00\u8d77\u53d1\u9001<\/li>\n
        • \u5982\u679c\u5728\u5ef6\u8fdf\u7b49\u5f85\u53d1\u9001 ACK \u671f\u95f4\uff0c\u5bf9\u65b9\u7684\u7b2c\u4e8c\u4e2a\u6570\u636e\u62a5\u6587\u53c8\u5230\u8fbe\u4e86\uff0c\u8fd9\u65f6\u5c31\u4f1a\u7acb\u523b\u53d1\u9001 ACK<\/li>\n<\/ul>\n

          \"\"<\/div><\/p>\n

          \u5ef6\u8fdf\u7b49\u5f85\u7684\u65f6\u95f4\u662f\u5728 Linux \u5185\u6838\u4e2d\u5b9a\u4e49\u7684\uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n

          \"\"<\/div><\/p>\n

          \u5173\u952e\u5c31\u9700\u8981 HZ \u8fd9\u4e2a\u6570\u503c\u5927\u5c0f\uff0cHZ \u662f\u8ddf\u7cfb\u7edf\u7684\u65f6\u949f\u9891\u7387\u6709\u5173\uff0c\u6bcf\u4e2a\u64cd\u4f5c\u7cfb\u7edf\u90fd\u4e0d\u4e00\u6837\uff0c\u5728\u6211\u7684 Linux \u7cfb\u7edf\u4e2d HZ \u5927\u5c0f\u662f 1000\uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n

          \"\"<\/div><\/p>\n

          \u77e5\u9053\u4e86 HZ \u7684\u5927\u5c0f\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u7b97\u51fa\uff1a<\/p>\n

            \n
          • \u6700\u5927\u5ef6\u8fdf\u786e\u8ba4\u65f6\u95f4\u662f 200 ms \uff081000\/5\uff09<\/li>\n
          • \u6700\u77ed\u5ef6\u8fdf\u786e\u8ba4\u65f6\u95f4\u662f 40 ms \uff081000\/25\uff09<\/li>\n<\/ul>\n

            \u600e\u4e48\u5173\u95ed TCP \u5ef6\u8fdf\u786e\u8ba4\u673a\u5236\uff1f<\/h4>\n

            \u5982\u679c\u8981\u5173\u95ed TCP \u5ef6\u8fdf\u786e\u8ba4\u673a\u5236\uff0c\u53ef\u4ee5\u5728 Socket \u8bbe\u7f6e\u91cc\u542f\u7528 TCP_QUICKACK\uff0c\u542f\u7528\u00a0TCP_QUICKACK\uff0c\u5c31\u76f8\u5f53\u4e8e\u5173\u95ed TCP \u5ef6\u8fdf\u786e\u8ba4\u673a\u5236\u3002<\/p>\n

            \n
            \n
            \n
            \n
            \n
            \/\/<\/span> 1<\/span> \u8868\u793a\u5f00\u542f TCP_QUICKACK\uff0c\u5373\u5173\u95ed TCP \u5ef6\u8fdf\u786e\u8ba4\u673a\u5236\r\nint<\/span> value =<\/span> 1<\/span>;<\/span>\r\nsetsockopt(<\/span>socketfd,<\/span> IPPROTO_TCP,<\/span> TCP_QUICKACK,<\/span> (<\/span>char<\/span>*<\/span>)<\/span>&<\/span> value,<\/span> sizeof(<\/span>int<\/span>)<\/span>)<\/span>;<\/span><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
            \u5b9e\u9a8c\u9a8c\u8bc1<\/h4>\n
            \u5b9e\u9a8c\u4e00<\/strong><\/p>\n
            \u63a5\u4e0b\u6765\uff0c\u6765\u7ed9\u5927\u5bb6\u505a\u4e2a\u5b9e\u9a8c\uff0c\u9a8c\u8bc1\u8fd9\u4e2a\u7ed3\u8bba\uff1a<\/p>\n
            \u5f53\u88ab\u52a8\u5173\u95ed\u65b9\uff08\u4e0a\u56fe\u7684\u670d\u52a1\u7aef\uff09\u5728 TCP \u6325\u624b\u8fc7\u7a0b\u4e2d\uff0c\u300c\u6ca1\u6709\u6570\u636e\u8981\u53d1\u9001\u300d\u5e76\u4e14\u300c\u5f00\u542f\u4e86 TCP \u5ef6\u8fdf\u786e\u8ba4\u673a\u5236\u300d\uff0c\u90a3\u4e48\u7b2c\u4e8c\u548c\u7b2c\u4e09\u6b21\u6325\u624b\u5c31\u4f1a\u5408\u5e76\u4f20\u8f93\uff0c\u8fd9\u6837\u5c31\u51fa\u73b0\u4e86\u4e09\u6b21\u6325\u624b\u3002<\/p>\n
            \u670d\u52a1\u7aef\u7684\u4ee3\u7801\u5982\u4e0b\uff0c\u505a\u7684\u4e8b\u60c5\u5f88\u7b80\u5355\uff0c\u5c31\u8bfb\u53d6\u6570\u636e\uff0c\u7136\u540e\u5f53 read \u8fd4\u56de 0 \u7684\u65f6\u5019\uff0c\u5c31\u9a6c\u4e0a\u8c03\u7528 close \u5173\u95ed\u8fde\u63a5\u3002\u56e0\u4e3a TCP \u5ef6\u8fdf\u786e\u8ba4\u673a\u5236\u662f\u9ed8\u8ba4\u5f00\u542f\u7684\uff0c\u6240\u4ee5\u4e0d\u9700\u8981\u7279\u6b8a\u8bbe\u7f6e\u3002<\/p>\n
            #include <<\/span>stdlib.h<\/span>><\/span>\r\n#include <<\/span>stdio.h<\/span>><\/span>\r\n#include <<\/span>errno.h<\/span>><\/span>\r\n#include <<\/span>string.h<\/span>><\/span>\r\n#include <<\/span>netdb.h<\/span>><\/span>\r\n#include <<\/span>sys\/<\/span>types.h<\/span>><\/span>\r\n#include <<\/span>netinet\/<\/span>in<\/span>.h<\/span>><\/span>\r\n#include <<\/span>sys\/<\/span>socket.h<\/span>><\/span>\r\n#include <<\/span>netinet\/<\/span>tcp.h<\/span>><\/span>\r\n\r\n#define MAXLINE 1024<\/span>\r\n\r\nint<\/span> main(<\/span>int<\/span> argc,<\/span> char<\/span> *<\/span>argv[<\/span>]<\/span>)<\/span>\r\n{<\/span>\r\n\r\n    \/\/<\/span> 1<\/span>. \u521b\u5efa\u4e00\u4e2a\u76d1\u542c socket\r\n    int<\/span> listenfd =<\/span> socket(<\/span>AF_INET,<\/span> SOCK_STREAM,<\/span> 0<\/span>)<\/span>;<\/span>\r\n    if(<\/span>listenfd <<\/span> 0<\/span>)<\/span>\r\n    {<\/span>\r\n        fprintf(<\/span>stderr,<\/span> \"socket error : %s\\n\"<\/span>,<\/span> strerror(<\/span>errno)<\/span>)<\/span>;<\/span>\r\n        return -<\/span>1<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n    \/\/<\/span> 2<\/span>. \u521d\u59cb\u5316\u670d\u52a1\u5668\u5730\u5740\u548c\u7aef\u53e3\r\n    struct sockaddr_in server_addr;<\/span>\r\n    bzero(<\/span>&<\/span>server_addr,<\/span> sizeof(<\/span>struct sockaddr_in)<\/span>)<\/span>;<\/span>\r\n    server_addr.sin_family<\/span> =<\/span> AF_INET;<\/span>\r\n    server_addr.sin_addr<\/span>.s_addr<\/span> =<\/span> htonl(<\/span>INADDR_ANY)<\/span>;<\/span>\r\n    server_addr.sin_port<\/span> =<\/span> htons(<\/span>8888<\/span>)<\/span>;<\/span>\r\n\r\n    \/\/<\/span> 3<\/span>. \u7ed1\u5b9a\u5730\u5740+<\/span>\u7aef\u53e3\r\n    if(<\/span>bind(<\/span>listenfd,<\/span> (<\/span>struct sockaddr *<\/span>)<\/span>(<\/span>&<\/span>server_addr)<\/span>,<\/span> sizeof(<\/span>struct sockaddr)<\/span>)<\/span> <<\/span> 0<\/span>)<\/span>\r\n    {<\/span>\r\n        fprintf(<\/span>stderr,<\/span>\"bind error:%s\\n\"<\/span>,<\/span> strerror(<\/span>errno)<\/span>)<\/span>;<\/span>\r\n        return -<\/span>1<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n    printf(<\/span>\"begin listen....\\n\"<\/span>)<\/span>;<\/span>\r\n\r\n    \/\/<\/span> 4<\/span>. \u5f00\u59cb\u76d1\u542c\r\n    if(<\/span>listen(<\/span>listenfd,<\/span> 128<\/span>)<\/span>)<\/span>\r\n    {<\/span>\r\n        fprintf(<\/span>stderr,<\/span> \"listen error:%s\\n\\a\"<\/span>,<\/span> strerror(<\/span>errno)<\/span>)<\/span>;<\/span>\r\n        exit(<\/span>1<\/span>)<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n\r\n    \/\/<\/span> 5<\/span>. \u83b7\u53d6\u5df2\u8fde\u63a5\u7684socket\r\n    struct sockaddr_in client_addr;<\/span>\r\n    socklen_t client_addrlen =<\/span> sizeof(<\/span>client_addr)<\/span>;<\/span>\r\n    int<\/span> clientfd =<\/span> accept(<\/span>listenfd,<\/span> (<\/span>struct sockaddr *<\/span>)<\/span>&<\/span>client_addr,<\/span> &<\/span>client_addrlen)<\/span>;<\/span>\r\n    if(<\/span>clientfd <<\/span> 0<\/span>)<\/span> {<\/span>\r\n        fprintf(<\/span>stderr,<\/span> \"accept error:%s\\n\\a\"<\/span>,<\/span> strerror(<\/span>errno)<\/span>)<\/span>;<\/span>\r\n        exit(<\/span>1<\/span>)<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n    printf(<\/span>\"accept success\\n\"<\/span>)<\/span>;<\/span>\r\n\r\n    char<\/span> message[<\/span>MAXLINE]<\/span> =<\/span> {<\/span>0<\/span>}<\/span>;<\/span>\r\n    \r\n    while(<\/span>1<\/span>)<\/span> {<\/span>\r\n        \/\/<\/span>6<\/span>. \u8bfb\u53d6\u5ba2\u6237\u7aef\u53d1\u9001\u7684\u6570\u636e\r\n        int<\/span> n =<\/span> read(<\/span>clientfd,<\/span> message,<\/span> MAXLINE)<\/span>;<\/span>\r\n        if(<\/span>n <<\/span> 0<\/span>)<\/span> {<\/span> \/\/<\/span> \u8bfb\u53d6\u9519\u8bef\r\n            fprintf(<\/span>stderr,<\/span> \"read error:%s\\n\\a\"<\/span>,<\/span> strerror(<\/span>errno)<\/span>)<\/span>;<\/span>\r\n            break;<\/span>\r\n        }<\/span> else if(<\/span>n ==<\/span> 0<\/span>)<\/span> {<\/span>  \/\/<\/span> \u8fd4\u56de 0<\/span> \uff0c\u4ee3\u8868\u8bfb\u5230 FIN \u62a5\u6587\r\n            fprintf(<\/span>stderr,<\/span> \"client closed \\n\"<\/span>)<\/span>;<\/span>\r\n            close(<\/span>clientfd)<\/span>;<\/span> \/\/<\/span> \u6ca1\u6709\u6570\u636e\u8981\u53d1\u9001\uff0c\u7acb\u9a6c\u5173\u95ed\u8fde\u63a5\r\n            break;<\/span>\r\n        }<\/span>\r\n\r\n        message[<\/span>n]<\/span> =<\/span> 0<\/span>;<\/span> \r\n        printf(<\/span>\"received %d bytes: %s\\n\"<\/span>,<\/span> n,<\/span> message)<\/span>;<\/span>\r\n    }<\/span>\r\n \r\n    close(<\/span>listenfd)<\/span>;<\/span>\r\n    return 0<\/span>;<\/span>\r\n}<\/span><\/pre>\n
            \u5ba2\u6237\u7aef\u4ee3\u7801\u5982\u4e0b\uff0c\u505a\u7684\u4e8b\u60c5\u4e5f\u5f88\u7b80\u5355\uff0c\u4e0e\u670d\u52a1\u7aef\u8fde\u63a5\u6210\u529f\u540e\uff0c\u5c31\u53d1\u9001\u6570\u636e\u7ed9\u670d\u52a1\u7aef\uff0c\u7136\u540e\u7761\u7720\u4e00\u79d2\u540e\uff0c\u5c31\u8c03\u7528 close \u5173\u95ed\u8fde\u63a5\uff0c\u6240\u4ee5\u5ba2\u6237\u7aef\u662f\u4e3b\u52a8\u5173\u95ed\u65b9\uff1a<\/p>\n
            #include <<\/span>stdlib.h<\/span>><\/span>\r\n#include <<\/span>stdio.h<\/span>><\/span>\r\n#include <<\/span>errno.h<\/span>><\/span>\r\n#include <<\/span>string.h<\/span>><\/span>\r\n#include <<\/span>netdb.h<\/span>><\/span>\r\n#include <<\/span>sys\/<\/span>types.h<\/span>><\/span>\r\n#include <<\/span>netinet\/<\/span>in<\/span>.h<\/span>><\/span>\r\n#include <<\/span>sys\/<\/span>socket.h<\/span>><\/span>\r\n\r\nint<\/span> main(<\/span>int<\/span> argc,<\/span> char<\/span> *<\/span>argv[<\/span>]<\/span>)<\/span>\r\n{<\/span>\r\n\r\n    \/\/<\/span> 1<\/span>. \u521b\u5efa\u4e00\u4e2a\u76d1\u542c socket\r\n    int<\/span> connectfd =<\/span> socket(<\/span>AF_INET,<\/span> SOCK_STREAM,<\/span> 0<\/span>)<\/span>;<\/span>\r\n    if(<\/span>connectfd <<\/span> 0<\/span>)<\/span>\r\n    {<\/span>\r\n        fprintf(<\/span>stderr,<\/span> \"socket error : %s\\n\"<\/span>,<\/span> strerror(<\/span>errno)<\/span>)<\/span>;<\/span>\r\n        return -<\/span>1<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n    \/\/<\/span> 2<\/span>. \u521d\u59cb\u5316\u670d\u52a1\u5668\u5730\u5740\u548c\u7aef\u53e3\r\n    struct sockaddr_in server_addr;<\/span>\r\n    bzero(<\/span>&<\/span>server_addr,<\/span> sizeof(<\/span>struct sockaddr_in)<\/span>)<\/span>;<\/span>\r\n    server_addr.sin_family<\/span> =<\/span> AF_INET;<\/span>\r\n    server_addr.sin_addr<\/span>.s_addr<\/span> =<\/span> inet_addr(<\/span>\"127.0.0.1\"<\/span>)<\/span>;<\/span>\r\n    server_addr.sin_port<\/span> =<\/span> htons(<\/span>8888<\/span>)<\/span>;<\/span>\r\n    \r\n    \/\/<\/span> 3<\/span>. \u8fde\u63a5\u670d\u52a1\u5668\r\n    if(<\/span>connect(<\/span>connectfd,<\/span> (<\/span>struct sockaddr *<\/span>)<\/span>(<\/span>&<\/span>server_addr)<\/span>,<\/span> sizeof(<\/span>server_addr)<\/span>)<\/span> <<\/span> 0<\/span>)<\/span>\r\n    {<\/span>\r\n        fprintf(<\/span>stderr,<\/span>\"connect error:%s\\n\"<\/span>,<\/span> strerror(<\/span>errno)<\/span>)<\/span>;<\/span>\r\n        return -<\/span>1<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n    printf(<\/span>\"connect success\\n\"<\/span>)<\/span>;<\/span>\r\n\r\n\r\n    char<\/span> sendline[<\/span>64<\/span>]<\/span> =<\/span> \"hello, i am xiaolin\"<\/span>;<\/span>\r\n\r\n    \/\/<\/span>4<\/span>. \u53d1\u9001\u6570\u636e\r\n    int<\/span> ret =<\/span> send(<\/span>connectfd,<\/span> sendline,<\/span> strlen(<\/span>sendline)<\/span>,<\/span> 0<\/span>)<\/span>;<\/span>\r\n    if(<\/span>ret !=<\/span> strlen(<\/span>sendline)<\/span>)<\/span> {<\/span>\r\n        fprintf(<\/span>stderr,<\/span>\"send data error:%s\\n\"<\/span>,<\/span> strerror(<\/span>errno)<\/span>)<\/span>;<\/span>\r\n        return -<\/span>1<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n    printf(<\/span>\"already send %d bytes\\n\"<\/span>,<\/span> ret)<\/span>;<\/span>\r\n\r\n    sleep(<\/span>1<\/span>)<\/span>;<\/span>\r\n\r\n    \/\/<\/span>5<\/span>. \u5173\u95ed\u8fde\u63a5\r\n    close(<\/span>connectfd)<\/span>;<\/span>\r\n    return 0<\/span>;<\/span>\r\n}<\/span><\/pre>\n
            \u7f16\u8bd1\u670d\u52a1\u7aef\u548c\u5ba2\u6237\u7aef\u7684\u4ee3\u7801\uff1a<\/p>\n
            \"\"<\/div><\/p>\n
            \u5148\u542f\u7528\u670d\u52a1\u7aef\uff1a<\/p>\n
            \"\"<\/div><\/p>\n
            \u7136\u540e\u7528 tcpdump \u5de5\u5177\u5f00\u59cb\u6293\u5305\uff0c\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n
            \n
            \n
            \n
            \n
            \n
            tcpdump -<\/span>i lo tcp and<\/span> port 8888<\/span> -<\/span>s0 -<\/span>w \/<\/span>home\/<\/span>tcp_close.pcap<\/span><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
            \u7136\u540e\u542f\u7528\u5ba2\u6237\u7aef\uff0c\u53ef\u4ee5\u770b\u5230\uff0c\u4e0e\u670d\u52a1\u7aef\u8fde\u63a5\u6210\u529f\u540e\uff0c\u53d1\u5b8c\u6570\u636e\u5c31\u9000\u51fa\u4e86\u3002<\/p>\n
            \"\"<\/div><\/p>\n
            \u6b64\u65f6\uff0c\u670d\u52a1\u7aef\u7684\u8f93\u51fa\uff1a<\/p>\n
            \"\"<\/div><\/p>\n
            \u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u6765\u770b\u770b\u6293\u5305\u7684\u7ed3\u679c\u3002<\/p>\n
            \"\"<\/div><\/p>\n
            \u53ef\u4ee5\u770b\u5230\uff0cTCP \u6325\u624b\u6b21\u6570\u662f 3 \u6b21\u3002<\/p>\n
            \u6240\u4ee5\uff0c\u4e0b\u9762\u8fd9\u4e2a\u7ed3\u8bba\u662f\u6ca1\u95ee\u9898\u7684\u3002<\/p>\n
            \u7ed3\u8bba\uff1a\u5f53\u88ab\u52a8\u5173\u95ed\u65b9\uff08\u4e0a\u56fe\u7684\u670d\u52a1\u7aef\uff09\u5728 TCP \u6325\u624b\u8fc7\u7a0b\u4e2d\uff0c\u300c\u6ca1\u6709\u6570\u636e\u8981\u53d1\u9001\u300d\u5e76\u4e14\u300c\u5f00\u542f\u4e86 TCP \u5ef6\u8fdf\u786e\u8ba4\u673a\u5236\uff08\u9ed8\u8ba4\u4f1a\u5f00\u542f\uff09\u300d\uff0c\u90a3\u4e48\u7b2c\u4e8c\u548c\u7b2c\u4e09\u6b21\u6325\u624b\u5c31\u4f1a\u5408\u5e76\u4f20\u8f93\uff0c\u8fd9\u6837\u5c31\u51fa\u73b0\u4e86\u4e09\u6b21\u6325\u624b\u3002<\/p>\n
             <\/p>\n
            \u5b9e\u9a8c\u4e8c<\/strong><\/p>\n
            \u6211\u4eec\u518d\u505a\u4e00\u6b21\u5b9e\u9a8c\uff0c\u6765\u770b\u770b\u5173\u95ed TCP \u5ef6\u8fdf\u786e\u8ba4\u673a\u5236\uff0c\u4f1a\u51fa\u73b0\u56db\u6b21\u6325\u624b\u5417\uff1f<\/p>\n
            \u5ba2\u6237\u7aef\u4ee3\u7801\u4fdd\u6301\u4e0d\u53d8\uff0c\u670d\u52a1\u7aef\u4ee3\u7801\u9700\u8981\u589e\u52a0\u4e00\u70b9\u4e1c\u897f\u3002<\/p>\n
            \u5728\u4e0a\u9762\u670d\u52a1\u7aef\u4ee3\u7801\u4e2d\uff0c\u589e\u52a0\u4e86\u6253\u5f00\u4e86 TCP_QUICKACK \uff08\u5feb\u901f\u5e94\u7b54\uff09\u673a\u5236\u7684\u4ee3\u7801\uff0c\u5982\u4e0b\uff1a<\/p>\n
            \"\"<\/div><\/p>\n
            \u7f16\u8bd1\u597d\u670d\u52a1\u7aef\u4ee3\u7801\u540e\uff0c\u5c31\u5f00\u59cb\u8fd0\u884c\u670d\u52a1\u7aef\u548c\u5ba2\u6237\u7aef\u7684\u4ee3\u7801\uff0c\u540c\u65f6\u7528 tcpdump \u8fdb\u884c\u6293\u5305\u3002<\/p>\n
            \u6293\u5305\u7684\u7ed3\u679c\u5982\u4e0b\uff0c\u53ef\u4ee5\u770b\u5230\u662f\u56db\u6b21\u6325\u624b\u3002<\/p>\n
            \"\"<\/div><\/p>\n
            \n
            \u6240\u4ee5\uff0c\u5f53\u88ab\u52a8\u5173\u95ed\u65b9\uff08\u4e0a\u56fe\u7684\u670d\u52a1\u7aef\uff09\u5728 TCP \u6325\u624b\u8fc7\u7a0b\u4e2d\uff0c\u300c\u6ca1\u6709\u6570\u636e\u8981\u53d1\u9001\u300d\uff0c\u540c\u65f6\u300c\u5173\u95ed\u4e86 TCP \u5ef6\u8fdf\u786e\u8ba4\u673a\u5236\u300d\uff0c\u90a3\u4e48\u5c31\u4f1a\u662f\u56db\u6b21\u6325\u624b\u3002<\/p>\n
            \n
            \u8bbe\u7f6e TCP_QUICKACK \u7684\u4ee3\u7801\uff0c\u4e3a\u4ec0\u4e48\u8981\u653e\u5728 read \u8fd4\u56de 0 \u4e4b\u540e\uff1f<\/p>\n
             <\/p>\n
            \u6211\u4e5f\u662f\u591a\u6b21\u5b9e\u9a8c\u624d\u53d1\u73b0\uff0c\u5728 bind \u4e4b\u524d\u8bbe\u7f6e TCP_QUICKACK \u662f\u4e0d\u751f\u6548\u7684\uff0c\u53ea\u6709\u5728 read \u8fd4\u56de 0 \u7684\u65f6\u5019\uff0c\u8bbe\u7f6e TCP_QUICKACK \u624d\u4f1a\u51fa\u73b0\u56db\u6b21\u6325\u624b\u3002<\/p>\n
            \u7f51\u4e0a\u67e5\u4e86\u4e0b\u8d44\u6599\u8bf4\uff0c\u8bbe\u7f6e TCP_QUICKACK \u5e76\u4e0d\u662f\u6c38\u4e45\u7684\uff0c\u6240\u4ee5\u6bcf\u6b21\u8bfb\u53d6\u6570\u636e\u7684\u65f6\u5019\uff0c\u5982\u679c\u60f3\u8981\u7acb\u523b\u56de ACK\uff0c\u90a3\u5c31\u5f97\u5728\u6bcf\u6b21\u8bfb\u53d6\u6570\u636e\u4e4b\u540e\uff0c\u91cd\u65b0\u8bbe\u7f6e TCP_QUICKACK\u3002<\/p>\n
            \u800c\u6211\u8fd9\u91cc\u7684\u5b9e\u9a8c\uff0c\u76ee\u7684\u662f\u4e3a\u4e86\u5f53\u6536\u5230\u5ba2\u6237\u7aef\u7684 FIN \u62a5\u6587\uff08\u7b2c\u4e00\u6b21\u6325\u624b\uff09\u540e\uff0c\u7acb\u9a6c\u56de ACK \u62a5\u6587\uff0c\u6240\u4ee5\u5c31\u5728 read \u8fd4\u56de 0 \u7684\u65f6\u5019\uff0c\u8bbe\u7f6e TCP_QUICKACK\u3002<\/p>\n
            \u5f53\u7136\uff0c\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6ca1\u4eba\u4f1a\u5728\u6211\u8fd9\u4e2a\u4f4d\u7f6e\u8bbe\u7f6e TCP_QUICKACK\uff0c\u56e0\u4e3a\u64cd\u4f5c\u7cfb\u7edf\u90fd\u901a\u8fc7 TCP \u5ef6\u8fdf\u786e\u8ba4\u673a\u5236\u5e2e\u6211\u4eec\u628a\u56db\u6b21\u6325\u624b\u4f18\u5316\u6210\u4e86\u4e09\u6b21\u6325\u624b\u4e86\uff0c\u8fd9\u672c\u6765\u5c31\u662f\u4e00\u4ef6\u597d\u4e8b\u5440\u3002<\/p>\n
            \u603b\u7ed3<\/h3>\n
            \u5f53\u88ab\u52a8\u5173\u95ed\u65b9\u5728 TCP \u6325\u624b\u8fc7\u7a0b\u4e2d\uff0c\u5982\u679c\u300c\u6ca1\u6709\u6570\u636e\u8981\u53d1\u9001\u300d\uff0c\u540c\u65f6\u300c\u6ca1\u6709\u5f00\u542f TCP_QUICKACK\uff08\u9ed8\u8ba4\u60c5\u51b5\u5c31\u662f\u6ca1\u6709\u5f00\u542f\uff0c\u6ca1\u6709\u5f00\u542f TCP_QUICKACK\uff0c\u7b49\u4e8e\u5c31\u662f\u5728\u4f7f\u7528 TCP \u5ef6\u8fdf\u786e\u8ba4\u673a\u5236\uff09\u300d\uff0c\u90a3\u4e48\u7b2c\u4e8c\u548c\u7b2c\u4e09\u6b21\u6325\u624b\u5c31\u4f1a\u5408\u5e76\u4f20\u8f93\uff0c\u8fd9\u6837\u5c31\u51fa\u73b0\u4e86\u4e09\u6b21\u6325\u624b\u3002<\/p>\n
            \u539f\u6587\u94fe\u63a5\uff1ahttps:\/\/www.51cto.com\/article\/717235.html<\/p>\n
            \n
            \n
            \n
            \n","protected":false},"excerpt":{"rendered":"
            tcp\u5176\u5b9e\u4e09\u6b21\u6325\u624b\u4e5f\u53ef\u4ee5\u65ad\u94fe\u63a5\uff0c\u5e76\u4e0d\u4e00\u5b9a\u975e\u8981\u56db\u6b21\uff01\uff01\uff01 \u867d\u7136\u6211\u4eec\u5728\u5b66\u4e60 TCP \u6325\u624b\u65f6\uff0c\u5b66\u5230\u7684\u662f\u9700\u8981\u56db\u6b21\u6765\u5b8c\u6210 […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/11562"}],"collection":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=11562"}],"version-history":[{"count":9,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/11562\/revisions"}],"predecessor-version":[{"id":11590,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/11562\/revisions\/11590"}],"wp:attachment":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11562"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11562"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11562"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}