{"id":86554,"date":"2026-07-28T21:34:00","date_gmt":"2026-07-28T13:34:00","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/86554.html"},"modified":"2026-07-28T21:34:00","modified_gmt":"2026-07-28T13:34:00","slug":"%e3%80%90linux%e7%bd%91%e7%bb%9c%e3%80%91%e4%bb%8e-0-%e5%88%b0-1-%e6%8b%86%e8%a7%a3-tcp-%e7%bd%91%e7%bb%9c%e7%bc%96%e7%a8%8b%ef%bc%9a%e6%89%8b%e6%8a%8a%e6%89%8b%e5%ae%9e%e7%8e%b0%e5%a4%9a%e7%ba%bf","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/86554.html","title":{"rendered":"\u3010Linux\u7f51\u7edc\u3011\u4ece 0 \u5230 1 \u62c6\u89e3 TCP \u7f51\u7edc\u7f16\u7a0b\uff1a\u624b\u628a\u624b\u5b9e\u73b0\u591a\u7ebf\u7a0b Echo \u56de\u663e\u670d\u52a1\u5668"},"content":{"rendered":"

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

🔥\u8349\u8393\u718aLotso：\u4e2a\u4eba\u4e3b\u9875 <\/font><\/p>\n

\u2744\ufe0f\u4e2a\u4eba\u4e13\u680f: \u300aC++\u77e5\u8bc6\u5206\u4eab\u300b \u300aLinux \u5165\u95e8\u5230\u5b9e\u8df5：\u96f6\u57fa\u7840\u4e5f\u80fd\u61c2\u300b <\/font><\/p>\n

\u2728\u751f\u6d3b\u662f\u9ed8\u9ed8\u7684\u575a\u6301，\u6bc5\u529b\u662f\u6c38\u4e45\u7684\u4eab\u53d7！<\/font> <\/p>\n

\n

🎬 \u535a\u4e3b\u7b80\u4ecb：<\/font><\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\n

\u6587\u7ae0\u76ee\u5f55<\/h4>\n
    \n
  • \u524d\u8a00：<\/li>\n
  • \u4e00. TCP \u534f\u8bae\u6838\u5fc3\u7279\u6027\u4e0e\u57fa\u7840 API \u8be6\u89e3<\/li>\n
  • \n
      \n
    • 1.1 TCP \u4e0e UDP \u7684\u6838\u5fc3\u5dee\u5f02<\/li>\n
    • 1.2 TCP \u670d\u52a1\u7aef\u6838\u5fc3 API \u5168\u89e3\u6790<\/li>\n
    • 1.3 TCP \u5ba2\u6237\u7aef\u6838\u5fc3 API<\/li>\n<\/ul>\n<\/li>\n
    • \u4e8c. \u9879\u76ee\u524d\u7f6e\u5de5\u5177\u7ec4\u4ef6\u89e3\u6790（\u6709\u7684\u4e0a\u7bc7\u535a\u5ba2\u90fd\u5199\u8fc7\u4e86，\u6240\u4ee5\u6211\u4eec\u8fd9\u91cc\u53ea\u622a\u53d6\u7247\u6bb5）<\/li>\n
    • \n
        \n
      • 2.1 \u7f51\u7edc\u5730\u5740\u5c01\u88c5：InetAddr.hpp<\/li>\n
      • 2.2 \u7ebf\u7a0b\u5b89\u5168\u4fdd\u969c：Mutex.hpp \u4e0e LockGuard<\/li>\n
      • 2.3 \u65e5\u5fd7\u7cfb\u7edf：Logger.hpp<\/li>\n<\/ul>\n<\/li>\n
      • \u4e09. TCP EchoServer \u7684\u6f14\u8fdb\u5f0f\u5b9e\u73b0<\/li>\n
      • \n
          \n
        • 3.1 \u4e09\u7248\u672c\u5b8c\u6574\u4ee3\u7801\u6574\u5408\u9884\u89c8（\u540e\u7eed\u51e0\u4e2a\u677f\u5757\u8fdb\u884c\u7ec6\u8282\u62c6\u89e3）<\/li>\n
        • 3.2 V1 \u7248\u672c：\u5355\u8fdb\u7a0b\u57fa\u7840\u7248 EchoServer<\/li>\n
        • 3.2 V2 \u7248\u672c：\u591a\u8fdb\u7a0b\u5e76\u53d1\u7248 EchoServer<\/li>\n
        • 3.3 V3 \u7248\u672c：\u591a\u7ebf\u7a0b\u9ad8\u5e76\u53d1\u7248 EchoServer<\/li>\n<\/ul>\n<\/li>\n
        • \u56db. TCP \u7f16\u7a0b\u6838\u5fc3\u8e29\u5751\u4e0e\u9ad8\u9891\u9762\u8bd5\u8003\u70b9<\/li>\n
        • \u7ed3\u5c3e：<\/li>\n<\/ul>\n
          \n

          \u524d\u8a00：<\/h2>\n

          \u5728 Linux \u7f51\u7edc\u7f16\u7a0b\u4f53\u7cfb\u4e2d，TCP \u534f\u8bae\u662f\u9762\u5411\u8fde\u63a5\u3001\u53ef\u9760\u5b57\u8282\u6d41\u4f20\u8f93\u7684\u57fa\u77f3，HTTP\/HTTPS\u3001FTP\u3001SSH \u7b49\u7edd\u5927\u591a\u6570\u4e0a\u5c42\u5e94\u7528\u534f\u8bae\u5747\u57fa\u4e8e TCP \u6784\u5efa\u3002\u76f8\u8f83\u4e8e UDP \u7684\u65e0\u8fde\u63a5\u7279\u6027，TCP \u7684\u8fde\u63a5\u7ba1\u7406\u3001\u53ef\u9760\u4f20\u8f93\u3001\u6d41\u91cf\u63a7\u5236\u7b49\u673a\u5236，\u8ba9\u5176\u6210\u4e3a\u7a33\u5b9a\u7f51\u7edc\u670d\u52a1\u7684\u9996\u9009\u3002Echo \u56de\u663e\u670d\u52a1\u5668\u662f TCP \u7f51\u7edc\u7f16\u7a0b\u7684\u7ecf\u5178\u5165\u95e8\u6848\u4f8b，\u5b83\u5b8c\u6574\u8986\u76d6\u4e86 TCP \u670d\u52a1\u7aef\u4ece\u5957\u63a5\u5b57\u521b\u5efa\u3001\u5730\u5740\u7ed1\u5b9a\u3001\u8fde\u63a5\u76d1\u542c\u5230\u6570\u636e\u6536\u53d1\u7684\u5168\u6d41\u7a0b\u3002\u672c\u6587\u5c06\u4ee5\u6f14\u8fdb\u5f0f\u7684\u601d\u8def，\u4ece\u5355\u8fdb\u7a0b\u57fa\u7840\u7248\u5230\u591a\u8fdb\u7a0b\u5e76\u53d1\u7248，\u6700\u7ec8\u843d\u5730\u591a\u7ebf\u7a0b\u9ad8\u5e76\u53d1\u7248，\u62c6\u89e3 TCP \u7f16\u7a0b\u7684\u6838\u5fc3\u539f\u7406\u3001API \u4f7f\u7528\u3001\u5e76\u53d1\u5904\u7406\u65b9\u6848，\u540c\u65f6\u7ed3\u5408\u914d\u5957\u6e90\u7801\u6df1\u5ea6\u89e3\u8bfb\u5de5\u4e1a\u7ea7\u4ee3\u7801\u7684\u8bbe\u8ba1\u601d\u8def\u3002<\/p>\n

          \n

          \u4e00. TCP \u534f\u8bae\u6838\u5fc3\u7279\u6027\u4e0e\u57fa\u7840 API \u8be6\u89e3<\/h2>\n

          1.1 TCP \u4e0e UDP \u7684\u6838\u5fc3\u5dee\u5f02<\/h3>\n\n\u7279\u6027TCP \u534f\u8baeUDP \u534f\u8bae<\/tr>\n\n\n\n\n\n\n
          \u8fde\u63a5\u7279\u6027<\/td>\n\u9762\u5411\u8fde\u63a5，\u9700\u4e09\u6b21\u63e1\u624b\u5efa\u7acb\u8fde\u63a5\u3001\u56db\u6b21\u6325\u624b\u91ca\u653e\u8fde\u63a5<\/td>\n\u65e0\u8fde\u63a5，\u65e0\u9700\u63d0\u524d\u5efa\u7acb\u901a\u4fe1\u94fe\u8def<\/td>\n<\/tr>\n
          \u4f20\u8f93\u53ef\u9760\u6027<\/td>\n\u53ef\u9760\u4f20\u8f93，\u4fdd\u8bc1\u6570\u636e\u6709\u5e8f\u3001\u65e0\u91cd\u590d\u3001\u4e0d\u4e22\u5931<\/td>\n\u4e0d\u53ef\u9760\u4f20\u8f93，\u4e0d\u4fdd\u8bc1\u6570\u636e\u9001\u8fbe\u4e0e\u6709\u5e8f\u6027<\/td>\n<\/tr>\n
          \u4f20\u8f93\u6a21\u5f0f<\/td>\n\u9762\u5411\u5b57\u8282\u6d41，\u65e0\u8fb9\u754c\u7684\u6d41\u5f0f\u6570\u636e\u4f20\u8f93<\/td>\n\u9762\u5411\u6570\u636e\u62a5，\u6709\u8fb9\u754c\u7684\u72ec\u7acb\u6570\u636e\u5305\u4f20\u8f93<\/td>\n<\/tr>\n
          \u5e76\u53d1\u652f\u6301<\/td>\n\u9700\u4e3a\u6bcf\u4e2a\u8fde\u63a5\u7ef4\u62a4\u72ec\u7acb\u7684\u4f20\u8f93\u63a7\u5236\u5757<\/td>\n\u65e0\u9700\u7ef4\u62a4\u8fde\u63a5\u72b6\u6001，\u5929\u7136\u652f\u6301\u591a\u5ba2\u6237\u7aef\u6536\u53d1<\/td>\n<\/tr>\n
          \u9002\u7528\u573a\u666f<\/td>\n\u6587\u4ef6\u4f20\u8f93\u3001\u7f51\u9875\u8bbf\u95ee\u3001\u8fdc\u7a0b\u767b\u5f55\u7b49\u9700\u53ef\u9760\u4f20\u8f93\u7684\u573a\u666f<\/td>\n\u5b9e\u65f6\u76f4\u64ad\u3001\u6e38\u620f\u5e27\u540c\u6b65\u3001DNS \u67e5\u8be2\u7b49\u4f4e\u5ef6\u8fdf\u573a\u666f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          \u540c\u65f6 TCP \u4e0e UDP \u5747\u652f\u6301\u5168\u53cc\u5de5\u901a\u4fe1，\u540c\u4e00\u4e2a\u5957\u63a5\u5b57\u6587\u4ef6\u63cf\u8ff0\u7b26\u53ef\u540c\u65f6\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c，\u8fd9\u662f\u540e\u7eed\u5e76\u53d1\u8bbe\u8ba1\u7684\u6838\u5fc3\u57fa\u7840\u3002<\/p>\n

          1.2 TCP \u670d\u52a1\u7aef\u6838\u5fc3 API \u5168\u89e3\u6790<\/h3>\n

          TCP \u670d\u52a1\u7aef\u7f16\u7a0b\u6709\u56fa\u5b9a\u7684\u56db\u6b65\u6838\u5fc3\u6d41\u7a0b，\u5bf9\u5e94 5 \u4e2a\u5173\u952e\u7cfb\u7edf API，\u4e5f\u662f\u6240\u6709 TCP \u670d\u52a1\u7684\u901a\u7528\u9aa8\u67b6：<\/p>\n

            \n
          • socket()：\u521b\u5efa\u6d41\u5f0f\u5957\u63a5\u5b57，\u83b7\u53d6\u7f51\u7edc\u6587\u4ef6\u63cf\u8ff0\u7b26<\/li>\n
          • bind()：\u5c06\u5957\u63a5\u5b57\u4e0e\u56fa\u5b9a\u7684 IP \u5730\u5740\u3001\u7aef\u53e3\u53f7\u7ed1\u5b9a<\/li>\n
          • listen()：\u5c06\u5957\u63a5\u5b57\u8bbe\u7f6e\u4e3a\u76d1\u542c\u72b6\u6001，\u51c6\u5907\u63a5\u6536\u5ba2\u6237\u7aef\u8fde\u63a5<\/li>\n
          • accept()：\u963b\u585e\u7b49\u5f85\u5e76\u83b7\u53d6\u5df2\u5b8c\u6210\u4e09\u6b21\u63e1\u624b\u7684\u5ba2\u6237\u7aef\u8fde\u63a5，\u8fd4\u56de\u4e13\u5c5e IO \u5957\u63a5\u5b57<\/li>\n
          • read()\/write()：\u901a\u8fc7 IO \u5957\u63a5\u5b57\u4e0e\u5ba2\u6237\u7aef\u8fdb\u884c\u53cc\u5411\u6570\u636e\u8bfb\u5199<\/li>\n<\/ul>\n

            \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

            1.3 TCP \u5ba2\u6237\u7aef\u6838\u5fc3 API<\/h3>\n

            \u5ba2\u6237\u7aef\u6838\u5fc3\u6d41\u7a0b\u4e3a\u300c\u521b\u5efa\u5957\u63a5\u5b57 -> \u53d1\u8d77\u8fde\u63a5 -> \u6570\u636e\u6536\u53d1\u300d，\u6838\u5fc3 API \u4e3aconnect()，\u7528\u4e8e\u5411\u670d\u52a1\u7aef\u53d1\u8d77 TCP \u4e09\u6b21\u63e1\u624b，\u5efa\u7acb\u8fde\u63a5\u3002\u5ba2\u6237\u7aef\u65e0\u9700\u663e\u5f0f\u8c03\u7528bind()，\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u5728connect()\u65f6\u81ea\u52a8\u4e3a\u5957\u63a5\u5b57\u5206\u914d\u968f\u673a\u7a7a\u95f2\u7aef\u53e3\u3002<\/p>\n

            \n

            \u4e8c. \u9879\u76ee\u524d\u7f6e\u5de5\u5177\u7ec4\u4ef6\u89e3\u6790（\u6709\u7684\u4e0a\u7bc7\u535a\u5ba2\u90fd\u5199\u8fc7\u4e86，\u6240\u4ee5\u6211\u4eec\u8fd9\u91cc\u53ea\u622a\u53d6\u7247\u6bb5）<\/h2>\n

            \u672c\u9879\u76ee\u590d\u7528\u4e86\u5de5\u4e1a\u7ea7\u7684\u57fa\u7840\u7ec4\u4ef6，\u5c4f\u853d\u5e95\u5c42\u7ec6\u8282\u7684\u540c\u65f6\u4fdd\u8bc1\u4ee3\u7801\u7684\u5065\u58ee\u6027\u4e0e\u53ef\u7ef4\u62a4\u6027，\u6838\u5fc3\u7ec4\u4ef6\u5982\u4e0b：<\/p>\n

            2.1 \u7f51\u7edc\u5730\u5740\u5c01\u88c5：InetAddr.hpp<\/h3>\n

            \u6838\u5fc3\u8bbe\u8ba1\u601d\u8def：\u5c06sockaddr_in\u7ed3\u6784\u4f53\u3001\u7f51\u7edc \/ \u4e3b\u673a\u5b57\u8282\u5e8f\u8f6c\u6362\u3001\u5730\u5740\u5224\u7b49\u3001\u683c\u5f0f\u5316\u8f93\u51fa\u7b49\u64cd\u4f5c\u5b8c\u5168\u5c01\u88c5，\u5c4f\u853d\u539f\u751f socket \u63a5\u53e3\u7684\u5e95\u5c42\u7ec6\u8282，\u8ba9\u4e0a\u5c42\u4ee3\u7801\u65e0\u9700\u5173\u5fc3\u5b57\u8282\u5e8f\u8f6c\u6362\u3002<\/p>\n

            \u6838\u5fc3\u6e90\u7801\u7247\u6bb5\u4e0e\u89e3\u8bfb<\/p>\n

            \/\/ \u7f51\u7edc\u8f6c\u672c\u5730：recvfrom\/accept\u540e\u89e3\u6790\u5bf9\u7aef\u5730\u5740<\/span>
            \nInetAddr<\/span>(<\/span>struct<\/span> sockaddr_in<\/span> &<\/span>addr)<\/span>:<\/span> _net_addr<\/span>(<\/span>addr)<\/span>
            \n{<\/span>
            \n \/\/ ntohs：16\u4f4d\u7f51\u7edc\u5b57\u8282\u5e8f\u8f6c\u4e3b\u673a\u5b57\u8282\u5e8f<\/span>
            \n _port =<\/span> ntohs<\/span>(<\/span>_net_addr.<\/span>sin_port)<\/span>;<\/span>
            \n \/\/ inet_ntoa：32\u4f4d\u7f51\u7edcIP\u8f6c\u70b9\u5206\u5341\u8fdb\u5236\u5b57\u7b26\u4e32<\/span>
            \n _ip =<\/span> inet_ntoa<\/span>(<\/span>_net_addr.<\/span>sin_addr)<\/span>;<\/span>
            \n}<\/span><\/p>\n

            \/\/ \u672c\u5730\u8f6c\u7f51\u7edc：\u6784\u5efa\u670d\u52a1\u7aef\u7ed1\u5b9a\u5730\u5740\/\u5ba2\u6237\u7aef\u76ee\u6807\u5730\u5740<\/span>
            \nInetAddr<\/span>(<\/span>uint16_t<\/span> port,<\/span> const<\/span> std::<\/span>string ip =<\/span> "0.0.0.0"<\/span>)<\/span>
            \n :<\/span> _port<\/span>(<\/span>port)<\/span>,<\/span> _ip<\/span>(<\/span>ip)<\/span>
            \n{<\/span>
            \n _net_addr.<\/span>sin_family =<\/span> AF_INET;<\/span>
            \n \/\/ htons：\u4e3b\u673a\u5b57\u8282\u5e8f\u8f6c\u7f51\u7edc\u5b57\u8282\u5e8f<\/span>
            \n _net_addr.<\/span>sin_port =<\/span> htons<\/span>(<\/span>_port)<\/span>;<\/span>
            \n _net_addr.<\/span>sin_addr.<\/span>s_addr =<\/span> inet_addr<\/span>(<\/span>_ip.<\/span>c_str<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
            \n}<\/span><\/p>\n

            \/\/ \u91cd\u8f7d==\u8fd0\u7b97\u7b26：IP+\u7aef\u53e3\u552f\u4e00\u6807\u8bc6\u4e00\u4e2a\u7f51\u7edc\u7aef\u70b9<\/span>
            \nbool<\/span> operator<\/span>==<\/span>(<\/span>const<\/span> InetAddr &<\/span>who)<\/span> const<\/span>
            \n{<\/span>
            \n return<\/span> (<\/span>_ip ==<\/span> who.<\/span>_ip)<\/span> &&<\/span> (<\/span>_port ==<\/span> who.<\/span>_port)<\/span>;<\/span>
            \n}<\/span><\/p>\n

            \u89e3\u8bfb：\u53cc\u6784\u9020\u51fd\u6570\u5b9e\u73b0\u4e86\u7f51\u7edc\u4e0e\u4e3b\u673a\u5b57\u8282\u5e8f\u7684\u53cc\u5411\u81ea\u52a8\u8f6c\u6362，\u91cd\u8f7d == \u8fd0\u7b97\u7b26\u5b9e\u73b0\u4e86\u5ba2\u6237\u7aef\u7aef\u70b9\u7684\u552f\u4e00\u6027\u5224\u65ad，\u662f\u540e\u7eed\u8fde\u63a5\u7ba1\u7406\u7684\u6838\u5fc3\u57fa\u7840\u3002<\/p>\n

            2.2 \u7ebf\u7a0b\u5b89\u5168\u4fdd\u969c：Mutex.hpp \u4e0e LockGuard<\/h3>\n

            \u6838\u5fc3\u8bbe\u8ba1\u601d\u8def：\u57fa\u4e8e RAII（\u8d44\u6e90\u83b7\u53d6\u5373\u521d\u59cb\u5316）\u673a\u5236\u5c01\u88c5\u4e92\u65a5\u9501，\u5b9e\u73b0\u9501\u7684\u81ea\u52a8\u751f\u547d\u5468\u671f\u7ba1\u7406，\u5f7b\u5e95\u907f\u514d\u624b\u52a8\u52a0\u89e3\u9501\u5bfc\u81f4\u7684\u6b7b\u9501\u3001\u8d44\u6e90\u6cc4\u6f0f\u95ee\u9898\u3002<\/p>\n

            \u6838\u5fc3\u6e90\u7801\u7247\u6bb5\u4e0e\u89e3\u8bfb<\/p>\n

            \/\/ \u4e92\u65a5\u9501\u57fa\u7840\u5c01\u88c5<\/span>
            \nclass<\/span> Mutex<\/span>
            \n{<\/span>
            \npublic<\/span>:<\/span>
            \n Mutex<\/span>(<\/span>)<\/span> {<\/span> pthread_mutex_init<\/span>(<\/span>&<\/span>_lock,<\/span> nullptr<\/span>)<\/span>;<\/span> }<\/span>
            \n ~<\/span>Mutex<\/span>(<\/span>)<\/span> {<\/span> pthread_mutex_destroy<\/span>(<\/span>&<\/span>_lock)<\/span>;<\/span> }<\/span>
            \n void<\/span> Lock<\/span>(<\/span>)<\/span> {<\/span> pthread_mutex_lock<\/span>(<\/span>&<\/span>_lock)<\/span>;<\/span> }<\/span>
            \n void<\/span> UnLock<\/span>(<\/span>)<\/span> {<\/span> pthread_mutex_unlock<\/span>(<\/span>&<\/span>_lock)<\/span>;<\/span> }<\/span>
            \n pthread_mutex_t*<\/span> Origin<\/span>(<\/span>)<\/span> {<\/span> return<\/span> &<\/span>_lock;<\/span> }<\/span>
            \nprivate<\/span>:<\/span>
            \n pthread_mutex_t _lock;<\/span>
            \n}<\/span>;<\/span><\/p>\n

            \/\/ RAII\u9501\u5b88\u536b<\/span>
            \nclass<\/span> LockGuard<\/span>
            \n{<\/span>
            \npublic<\/span>:<\/span>
            \n LockGuard<\/span>(<\/span>Mutex*<\/span> lockptr)<\/span> :<\/span> _lockptr<\/span>(<\/span>lockptr)<\/span>
            \n {<\/span>
            \n _lockptr-><\/span>Lock<\/span>(<\/span>)<\/span>;<\/span> \/\/ \u6784\u9020\u65f6\u7acb\u5373\u52a0\u9501<\/span>
            \n }<\/span>
            \n ~<\/span>LockGuard<\/span>(<\/span>)<\/span>
            \n {<\/span>
            \n _lockptr-><\/span>UnLock<\/span>(<\/span>)<\/span>;<\/span> \/\/ \u79bb\u5f00\u4f5c\u7528\u57df\u6790\u6784\u65f6\u81ea\u52a8\u89e3\u9501<\/span>
            \n }<\/span>
            \nprivate<\/span>:<\/span>
            \n Mutex*<\/span> _lockptr;<\/span>
            \n}<\/span>;<\/span><\/p>\n

            \u89e3\u8bfb：LockGuard \u901a\u8fc7\u6784\u9020\u4e0e\u6790\u6784\u51fd\u6570\u5b9e\u73b0\u4e86\u9501\u7684\u81ea\u52a8\u7ba1\u7406，\u65e0\u8bba\u4ee3\u7801\u6b63\u5e38\u6267\u884c\u8fd8\u662f\u5f02\u5e38\u629b\u51fa，\u90fd\u80fd\u4fdd\u8bc1\u9501\u88ab\u6b63\u786e\u91ca\u653e，\u662f\u591a\u7ebf\u7a0b\u7f16\u7a0b\u4e2d\u7ebf\u7a0b\u5b89\u5168\u7684\u6838\u5fc3\u4fdd\u969c\u3002<\/p>\n

            2.3 \u65e5\u5fd7\u7cfb\u7edf：Logger.hpp<\/h3>\n

            \u6838\u5fc3\u8bbe\u8ba1\u601d\u8def：\u91c7\u7528\u7b56\u7565\u6a21\u5f0f\u89e3\u8026\u65e5\u5fd7\u7684\u751f\u6210\u4e0e\u8f93\u51fa，\u652f\u6301\u63a7\u5236\u53f0 \/ \u6587\u4ef6\u53cc\u8f93\u51fa\u7b56\u7565，\u901a\u8fc7 RAII \u673a\u5236\u5b9e\u73b0\u65e5\u5fd7\u7684\u81ea\u52a8\u5237\u65b0，\u540c\u65f6\u4fdd\u8bc1\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\u7684\u8f93\u51fa\u5b89\u5168\u3002<\/p>\n

            \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

            \n

            \u4e09. TCP EchoServer \u7684\u6f14\u8fdb\u5f0f\u5b9e\u73b0<\/h2>\n

            3.1 \u4e09\u7248\u672c\u5b8c\u6574\u4ee3\u7801\u6574\u5408\u9884\u89c8（\u540e\u7eed\u51e0\u4e2a\u677f\u5757\u8fdb\u884c\u7ec6\u8282\u62c6\u89e3）<\/h3>\n

            \u6211\u4eec\u8fd9\u91cc\u5ba2\u6237\u7aef\u5c31\u5b9e\u73b0\u4e86\u4e2a\u7b80\u5355\u7684\u6846\u67b6\u5c31\u4e0d\u5c55\u793a\u4e86\u3002<\/p>\n

              \n
            • TcpEchoServer.hpp<\/li>\n<\/ul>\n

              #<\/span>ifndef<\/span> __TCP__ECHOSERVER__HPP<\/span><\/span>
              \n#<\/span>define<\/span> __TCP__ECHOSERVER__HPP<\/span><\/span><\/p>\n

              #<\/span>include<\/span> <csignal><\/span><\/span>
              \n#<\/span>include<\/span> <cstdint><\/span><\/span>
              \n#<\/span>include<\/span> <pthread.h><\/span><\/span>
              \n#<\/span>include<\/span> <string><\/span><\/span>
              \n#<\/span>include<\/span> <string.h><\/span><\/span>
              \n#<\/span>include<\/span> <unistd.h><\/span><\/span>
              \n#<\/span>include<\/span> <sys\/wait.h><\/span><\/span><\/p>\n

              #<\/span>include<\/span> <sys\/socket.h><\/span><\/span>
              \n#<\/span>include<\/span> <netinet\/in.h><\/span><\/span>
              \n#<\/span>include<\/span> <arpa\/inet.h><\/span><\/span>
              \n#<\/span>include<\/span> "InetAddr.hpp"<\/span><\/span>
              \n#<\/span>include<\/span> "Logger.hpp"<\/span><\/span>
              \nusing<\/span> namespace<\/span> LogModule;<\/span><\/p>\n

              static<\/span> const<\/span> uint16_t<\/span> gdefaultport =<\/span> 8080<\/span>;<\/span>
              \nstatic<\/span> const<\/span> int<\/span> gbacklog =<\/span> 32<\/span>;<\/span><\/p>\n

              class<\/span> TcpEchoServer<\/span>
              \n{<\/span>
              \nprivate<\/span>:<\/span>
              \n \/\/ sockfd: \u65e2\u53ef\u4ee5\u652f\u6301\u8bfb，\u53c8\u53ef\u4ee5\u652f\u6301\u5199, TCP socket\u4e5f\u662f\u5168\u53cc\u5de5\u7684.<\/span>
              \n \/\/ \u8be5\u51fd\u6570\u4e3a\u5177\u4f53\u7684\u4e1a\u52a1\u5904\u7406\u903b\u8f91，\u626e\u6f14\u201c\u670d\u52a1\u5458\u201d\u7684\u89d2\u8272<\/span>
              \n void<\/span> Service<\/span>(<\/span>int<\/span> sockfd,<\/span> InetAddr client)<\/span>
              \n {<\/span>
              \n \/\/ \u957f\u8fde\u63a5\u670d\u52a1：\u53ea\u8981\u5ba2\u6237\u7aef\u4e0d\u4e3b\u52a8\u9000\u51fa，\u670d\u52a1\u5668\u5c31\u4e00\u76f4\u4e3a\u5176\u63d0\u4f9b\u670d\u52a1<\/span>
              \n while<\/span> (<\/span>true<\/span>)<\/span>
              \n {<\/span>
              \n char<\/span> inbuffer[<\/span>1024<\/span>]<\/span>;<\/span><\/p>\n

              \/\/ 1. \u8bfb\u53d6\u6570\u636e (\u7c7b\u4f3c\u4e8e\u8bfb\u53d6\u6587\u4ef6)<\/span>
              \n int<\/span> n =<\/span> read<\/span>(<\/span>sockfd,<\/span> inbuffer,<\/span> sizeof<\/span>(<\/span>inbuffer)<\/span> –<\/span> 1<\/span>)<\/span>;<\/span>
              \n if<\/span>(<\/span>n ><\/span> 0<\/span>)<\/span>
              \n {<\/span>
              \n \/\/ n > 0 \u8868\u793a\u6210\u529f\u8bfb\u53d6\u5230\u4e86 n \u4e2a\u5b57\u8282\u7684\u6570\u636e<\/span>
              \n inbuffer[<\/span>n]<\/span> =<\/span> 0<\/span>;<\/span> \/\/ \u5c06\u8bfb\u53d6\u5230\u7684\u5b57\u8282\u6d41\u8f6c\u6362\u4e3a C \u98ce\u683c\u7684\u5b57\u7b26\u4e32<\/span>
              \n LOG<\/span>(<\/span>LogLevel::<\/span>INFO)<\/span> <<<\/span> client.<\/span>StringAddress<\/span>(<\/span>)<\/span> <<<\/span> " say# "<\/span> <<<\/span> inbuffer;<\/span>
              \n }<\/span>
              \n else<\/span> if<\/span>(<\/span>n ==<\/span> 0<\/span>)<\/span>
              \n {<\/span>
              \n \/\/ \u6ce8\u610f：n == 0 \u5728 TCP \u4e2d\u662f\u4e00\u4e2a\u5f3a\u4fe1\u53f7，\u4ee3\u8868\u5bf9\u7aef（\u5ba2\u6237\u7aef）\u5df2\u7ecf\u5173\u95ed\u4e86\u8fde\u63a5 (EOF)<\/span>
              \n \/\/ \u6b64\u65f6\u670d\u52a1\u7aef\u4e5f\u5e94\u8be5\u968f\u4e4b\u7ed3\u675f\u670d\u52a1\u5e76\u9000\u51fa\u5faa\u73af<\/span>
              \n LOG<\/span>(<\/span>LogLevel::<\/span>INFO)<\/span> <<<\/span> client.<\/span>StringAddress<\/span>(<\/span>)<\/span> <<<\/span> " close sockfd: "<\/span> <<<\/span> sockfd <<<\/span> ", me too!"<\/span>;<\/span>
              \n break<\/span>;<\/span>
              \n }<\/span>
              \n else<\/span>
              \n {<\/span>
              \n \/\/ n < 0 \u8868\u793a\u8bfb\u53d6\u53d1\u751f\u9519\u8bef（\u5982\u88ab\u4fe1\u53f7\u4e2d\u65ad\u7b49）<\/span>
              \n LOG<\/span>(<\/span>LogLevel::<\/span>ERROR)<\/span> <<<\/span> "read socket error"<\/span>;<\/span>
              \n break<\/span>;<\/span>
              \n }<\/span><\/p>\n

              \/\/ \u52a0\u5de5\u5904\u7406\u6570\u636e：\u4f53\u73b0 Echo (\u56de\u663e) \u7684\u6838\u5fc3\u4e1a\u52a1\u903b\u8f91<\/span>
              \n std::<\/span>string echo_string =<\/span> "server echo# "<\/span>;<\/span>
              \n echo_string +=<\/span> inbuffer;<\/span><\/p>\n

              \/\/ 2. \u5199\u56de\u6570\u636e (\u5c06\u52a0\u5de5\u540e\u7684\u5b57\u7b26\u4e32\u53d1\u56de\u7ed9\u5ba2\u6237\u7aef)<\/span>
              \n int<\/span> m =<\/span> write<\/span>(<\/span>sockfd,<\/span> echo_string.<\/span>c_str<\/span>(<\/span>)<\/span>,<\/span> echo_string.<\/span>size<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
              \n if<\/span>(<\/span>m <<\/span> 0<\/span>)<\/span>
              \n {<\/span>
              \n LOG<\/span>(<\/span>LogLevel::<\/span>ERROR)<\/span> <<<\/span> "write socket error"<\/span>;<\/span>
              \n break<\/span>;<\/span>
              \n }<\/span>
              \n }<\/span><\/p>\n

              \/\/ \u6781\u5176\u91cd\u8981：\u670d\u52a1\u7ed3\u675f\u540e，\u5fc5\u987b\u5173\u95ed\u8be5\u5ba2\u6237\u7aef\u5bf9\u5e94\u7684\u901a\u4fe1\u5957\u63a5\u5b57，\u5426\u5219\u4f1a\u5bfc\u81f4\u7cfb\u7edf\u6587\u4ef6\u63cf\u8ff0\u7b26(fd)\u6cc4\u6f0f<\/span>
              \n close<\/span>(<\/span>sockfd)<\/span>;<\/span>
              \n }<\/span>
              \npublic<\/span>:<\/span>
              \n \/\/ \u6784\u9020\u51fd\u6570：\u521d\u59cb\u5316\u76d1\u542c\u7aef\u53e3，\u5e76\u5c06\u76d1\u542c\u5957\u63a5\u5b57\u521d\u59cb\u5316\u4e3a -1（\u8868\u793a\u65e0\u6548\u72b6\u6001）<\/span>
              \n TcpEchoServer<\/span>(<\/span>uint16_t<\/span> port =<\/span> gdefaultport)<\/span>:<\/span> _port<\/span>(<\/span>port)<\/span>,<\/span> _listensockfd<\/span>(<\/span>–<\/span>1<\/span>)<\/span>
              \n {<\/span>}<\/span><\/p>\n

              \/\/ \u670d\u52a1\u5668\u521d\u59cb\u5316：\u5b8c\u6210\u7f51\u7edc\u7f16\u7a0b\u7ecf\u5178\u7684\u201c\u4e09\u677f\u65a7\u201d (socket -> bind -> listen)<\/span>
              \n void<\/span> Init<\/span>(<\/span>)<\/span>
              \n {<\/span>
              \n \/\/ 1. \u521b\u5efa\u5957\u63a5\u5b57 (\u4e70\u624b\u673a)<\/span>
              \n \/\/ AF_INET: IPv4 \u7f51\u7edc\u534f\u8bae; SOCK_STREAM: \u9762\u5411\u5b57\u8282\u6d41\u7684 TCP \u534f\u8bae<\/span>
              \n _listensockfd =<\/span> socket<\/span>(<\/span>AF_INET,<\/span> SOCK_STREAM,<\/span> 0<\/span>)<\/span>;<\/span> \/\/ \u8bbe\u7f6e\u62100\u5c31\u53ef\u4ee5\u4e86，\u7cfb\u7edf\u4f1a\u81ea\u52a8\u63a8\u5bfc\u4e3a IPPROTO_TCP<\/span>
              \n if<\/span>(<\/span>_listensockfd <<\/span> 0<\/span>)<\/span>
              \n {<\/span>
              \n LOG<\/span>(<\/span>LogLevel::<\/span>FATAL)<\/span> <<<\/span> "create socket error: "<\/span> <<<\/span> _listensockfd;<\/span>
              \n exit<\/span>(<\/span>2<\/span>)<\/span>;<\/span>
              \n }<\/span>
              \n LOG<\/span>(<\/span>LogLevel::<\/span>INFO)<\/span> <<<\/span> "create socket success: "<\/span> <<<\/span> _listensockfd;<\/span><\/p>\n

              \/\/ 2.bind (\u529e\u624b\u673a\u5361，\u7ed1\u5b9a\u53f7\u7801)<\/span>
              \n \/\/ \u6211\u4eec\u8fd9\u91cc\u662f\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u6211\u4eec\u7684InetAddr\u7684,\u4f46\u662f\u6211\u4eec\u540e\u9762\u518d\u7528<\/span>
              \n struct<\/span> sockaddr_in<\/span> local;<\/span>
              \n socklen_t len =<\/span> sizeof<\/span>(<\/span>local)<\/span>;<\/span>
              \n memset<\/span>(<\/span>&<\/span>local,<\/span> 0<\/span>,<\/span> len)<\/span>;<\/span> \/\/ \u7ed3\u6784\u4f53\u6e05\u96f6，\u517b\u6210\u826f\u597d\u4e60\u60ef<\/span>
              \n local.<\/span>sin_family =<\/span> AF_INET;<\/span>
              \n local.<\/span>sin_port =<\/span> htons<\/span>(<\/span>_port)<\/span>;<\/span> \/\/ \u4e3b\u673a\u5b57\u8282\u5e8f(Host) \u8f6c \u7f51\u7edc\u5b57\u8282\u5e8f(Network) -> Short(16\u4f4d\u7aef\u53e3)<\/span>
              \n local.<\/span>sin_addr.<\/span>s_addr =<\/span> htonl<\/span>(<\/span>INADDR_ANY)<\/span>;<\/span> \/\/ \u76d1\u542c\u672c\u673a\u6240\u6709\u7f51\u5361\u7684 IP \u5730\u5740<\/span><\/p>\n

              int<\/span> n =<\/span> bind<\/span>(<\/span>_listensockfd,<\/span> (<\/span>struct<\/span> sockaddr<\/span>*<\/span>)<\/span>&<\/span>local,<\/span> len)<\/span>;<\/span>
              \n if<\/span>(<\/span>n <<\/span> 0<\/span>)<\/span>
              \n {<\/span>
              \n \/\/ \u5e38\u89c1\u9519\u8bef：\u7aef\u53e3\u88ab\u5360\u7528\u65f6\u4f1a bind \u5931\u8d25<\/span>
              \n LOG<\/span>(<\/span>LogLevel::<\/span>FATAL)<\/span> <<<\/span> "bind error: "<\/span> <<<\/span> _listensockfd;<\/span>
              \n exit<\/span>(<\/span>3<\/span>)<\/span>;<\/span>
              \n }<\/span>
              \n LOG<\/span>(<\/span>LogLevel::<\/span>INFO)<\/span> <<<\/span> "bind success: "<\/span> <<<\/span> _listensockfd;<\/span><\/p>\n

              \/\/ 3. \u8bbe\u7f6e\u6210\u76d1\u542c (\u5f00\u673a\u5e76\u8bbe\u7f6e\u94c3\u58f0，\u51c6\u5907\u63a5\u542c\u7535\u8bdd)<\/span>
              \n \/\/ gbacklog (\u5168\u8fde\u63a5\u961f\u5217\u957f\u5ea6) \u51b3\u5b9a\u4e86\u5e95\u5c42\u6700\u591a\u80fd\u7f13\u5b58\u591a\u5c11\u4e2a\u672a\u88ab accept \u7684\u8fde\u63a5<\/span>
              \n n =<\/span> listen<\/span>(<\/span>_listensockfd,<\/span> gbacklog)<\/span>;<\/span>
              \n if<\/span>(<\/span>n <<\/span> 0<\/span>)<\/span>
              \n {<\/span>
              \n LOG<\/span>(<\/span>LogLevel::<\/span>FATAL)<\/span> <<<\/span> "listen error: "<\/span> <<<\/span> _listensockfd;<\/span>
              \n exit<\/span>(<\/span>3<\/span>)<\/span>;<\/span>
              \n }<\/span>
              \n LOG<\/span>(<\/span>LogLevel::<\/span>INFO)<\/span> <<<\/span> "listen success: "<\/span> <<<\/span> _listensockfd;<\/span>
              \n }<\/span><\/p>\n

              \/\/ \u5185\u90e8\u7c7b：\u7528\u4e8e\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\u5411\u65b0\u7ebf\u7a0b\u4f20\u9012\u53c2\u6570<\/span>
              \n \/\/ \u56e0\u4e3a pthread_create \u7684\u56de\u8c03\u51fd\u6570\u53ea\u63a5\u53d7\u4e00\u4e2a void* \u53c2\u6570，\u6240\u4ee5\u9700\u8981\u5c01\u88c5\u4e3a\u4e00\u4e2a\u7ed3\u6784\u4f53\/\u7c7b<\/span>
              \n class<\/span> ThreadData<\/span>
              \n {<\/span>
              \n public<\/span>:<\/span>
              \n ThreadData<\/span>(<\/span>int<\/span> sockfd,<\/span> InetAddr addr,<\/span> TcpEchoServer *<\/span>owner)<\/span>
              \n :<\/span> _sockfd<\/span>(<\/span>sockfd)<\/span>
              \n ,<\/span> _address<\/span>(<\/span>addr)<\/span>
              \n ,<\/span> _owner<\/span>(<\/span>owner)<\/span>
              \n {<\/span>}<\/span>
              \n ~<\/span>ThreadData<\/span>(<\/span>)<\/span>{<\/span>}<\/span>
              \n public<\/span>:<\/span>
              \n int<\/span> _sockfd;<\/span> \/\/ \u4e0e\u5ba2\u6237\u7aef\u901a\u4fe1\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26<\/span>
              \n InetAddr _address;<\/span> \/\/ \u5ba2\u6237\u7aef\u7684\u5730\u5740\u4fe1\u606f<\/span>
              \n TcpEchoServer *<\/span>_owner;<\/span> \/\/ \u6307\u5411\u670d\u52a1\u5668\u5bf9\u8c61\u672c\u8eab\u7684\u6307\u9488，\u7528\u4e8e\u8c03\u7528\u7c7b\u5185\u90e8\u7684\u975e\u9759\u6001\u6210\u5458\u51fd\u6570 (\u5982 Service)<\/span>
              \n }<\/span>;<\/span><\/p>\n

              \/\/ \u9759\u6001\u7684<\/span>
              \n \/\/ \u5fc5\u987b\u58f0\u660e\u4e3a static：\u56e0\u4e3a\u7c7b\u7684\u975e\u9759\u6001\u6210\u5458\u51fd\u6570\u9ed8\u8ba4\u5e26\u6709 this \u6307\u9488，\u4f1a\u5bfc\u81f4\u53c2\u6570\u7c7b\u578b\u4e0e pthread_create \u4e0d\u5339\u914d<\/span>
              \n static<\/span> void<\/span>*<\/span> threadRun<\/span>(<\/span>void<\/span>*<\/span> args)<\/span>
              \n {<\/span>
              \n \/\/ \u5206\u79bb：\u8ba9\u7ebf\u7a0b\u6267\u884c\u7ed3\u675f\u540e\u7531\u64cd\u4f5c\u7cfb\u7edf\u81ea\u52a8\u56de\u6536\u8d44\u6e90，\u4e3b\u7ebf\u7a0b\u65e0\u9700\u963b\u585e\u7b49\u5f85 (join)<\/span>
              \n pthread_detach<\/span>(<\/span>pthread_self<\/span>(<\/span>)<\/span>)<\/span>;<\/span><\/p>\n

              \/\/ \u8fd8\u539f\u6570\u636e\u7c7b\u578b<\/span>
              \n ThreadData *<\/span>td =<\/span> static_cast<\/span><<\/span>ThreadData*<\/span>><\/span><\/span><\/span>(<\/span>args)<\/span>;<\/span><\/p>\n

              \/\/ \u5229\u7528\u4f20\u5165\u7684 _owner \u6307\u9488，\u8c03\u7528\u670d\u52a1\u5668\u5bf9\u8c61\u7684 Service \u65b9\u6cd5\u5f00\u59cb\u901a\u4fe1<\/span>
              \n td-><\/span>_owner-><\/span>Service<\/span>(<\/span>td-><\/span>_sockfd,<\/span> td-><\/span>_address)<\/span>;<\/span><\/p>\n

              \/\/ \u8d44\u6e90\u6e05\u7406：\u7531\u4e8e ThreadData \u662f\u5728\u5806\u4e0a new \u51fa\u6765\u7684，\u7528\u5b8c\u5fc5\u987b\u91ca\u653e，\u9632\u6b62\u5185\u5b58\u6cc4\u6f0f<\/span>
              \n delete<\/span> td;<\/span>
              \n return<\/span> nullptr<\/span>;<\/span>
              \n }<\/span><\/p>\n

              void<\/span> Start<\/span>(<\/span>)<\/span>
              \n {<\/span>
              \n \/\/ \u591a\u8fdb\u7a0b\u7248\u672c\u7b49\u5f85\u7684\u6700\u4f73\u5b9e\u8df5 (\u5982\u679c\u4f60\u542f\u7528\u591a\u8fdb\u7a0b\u7248\u672c，\u5efa\u8bae\u6253\u5f00\u6b64\u6ce8\u91ca)<\/span>
              \n \/\/ signal(SIGCHLD, SIG_IGN); \/\/ \u5ffd\u7565\u5b50\u8fdb\u7a0b\u9000\u51fa\u4fe1\u53f7，\u8ba9\u5185\u6838\u81ea\u52a8\u56de\u6536\u50f5\u5c38\u8fdb\u7a0b<\/span><\/p>\n

              while<\/span>(<\/span>true<\/span>)<\/span>
              \n {<\/span>
              \n struct<\/span> sockaddr_in<\/span> clientaddr;<\/span>
              \n socklen_t len =<\/span> sizeof<\/span>(<\/span>clientaddr)<\/span>;<\/span><\/p>\n

              \/\/ accept: \u4ece\u5168\u8fde\u63a5\u961f\u5217\u4e2d\u53d6\u51fa\u4e00\u4e2a\u5df2\u7ecf\u5efa\u7acb\u597d\u7684\u8fde\u63a5<\/span>
              \n \/\/ _listensockfd \u8d1f\u8d23\u62c9\u5ba2，\u8fd4\u56de\u7684 sockfd \u8d1f\u8d23\u4e13\u95e8\u4e3a\u8fd9\u4e2a\u5ba2\u4eba\u670d\u52a1<\/span>
              \n int<\/span> sockfd =<\/span> accept<\/span>(<\/span>_listensockfd,<\/span> (<\/span>struct<\/span> sockaddr<\/span> *<\/span>)<\/span>&<\/span>clientaddr,<\/span> &<\/span>len)<\/span>;<\/span>
              \n if<\/span> (<\/span>sockfd <<\/span> 0<\/span>)<\/span>
              \n {<\/span>
              \n \/\/ accept \u5931\u8d25\u4e0d\u4ee3\u8868\u670d\u52a1\u5668\u5d29\u6e83，\u53ef\u80fd\u662f\u4fe1\u53f7\u6253\u65ad，\u7ee7\u7eed\u63a5\u5f85\u4e0b\u4e00\u4e2a\u5ba2\u4eba\u5373\u53ef<\/span>
              \n LOG<\/span>(<\/span>LogLevel::<\/span>WARNING)<\/span> <<<\/span> "accept error"<\/span>;<\/span>
              \n continue<\/span>;<\/span>
              \n }<\/span>
              \n \/\/ \u7f51\u7edc\u8f6c\u4e3b\u673a：\u89e3\u6790\u51fa\u5ba2\u6237\u7aef\u7684 IP \u548c \u7aef\u53e3<\/span>
              \n InetAddr clientaddress<\/span>(<\/span>clientaddr)<\/span>;<\/span>
              \n LOG<\/span>(<\/span>LogLevel::<\/span>INFO)<\/span> <<<\/span> "get a new link: "<\/span> <<<\/span> clientaddress.<\/span>StringAddress<\/span>(<\/span>)<\/span> <<<\/span> " sockfd: "<\/span> <<<\/span> sockfd;<\/span><\/p>\n

              \/\/ \u5904\u7406\u8fde\u63a5, \u8fdb\u884cIO\u901a\u4fe1<\/span><\/p>\n

              \/\/ ==============================================================================<\/span>
              \n \/\/ \u3010Version 2 — \u591a\u7ebf\u7a0b\u7248\u672c (\u5f53\u524d\u751f\u6548)\u3011<\/span>
              \n \/\/ \u4f18\u52bf：\u6bd4\u591a\u8fdb\u7a0b\u8f7b\u91cf，\u521b\u5efa\u6210\u672c\u4f4e，\u6240\u6709\u7ebf\u7a0b\u5171\u4eab\u8fdb\u7a0b\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868\u3002<\/span>
              \n \/\/ ==============================================================================<\/span>
              \n pthread_t tid;<\/span>
              \n \/\/ \u5fc5\u987b\u5728\u5806\u4e0a new \u5bf9\u8c61：\u5982\u679c\u5728\u6808\u4e0a\u521b\u5efa，\u5f53\u524d\u5faa\u73af\u7ed3\u675f\u65f6 td \u4f1a\u88ab\u9500\u6bc1，\u65b0\u7ebf\u7a0b\u8bbf\u95ee\u4f1a\u5f15\u53d1\u91ce\u6307\u9488\u5d29\u6e83<\/span>
              \n ThreadData*<\/span> td =<\/span> new<\/span> ThreadData<\/span>(<\/span>sockfd,<\/span> clientaddress,<\/span> this<\/span>)<\/span>;<\/span>
              \n pthread_create<\/span>(<\/span>&<\/span>tid,<\/span> nullptr<\/span>,<\/span> threadRun,<\/span> (<\/span>void<\/span>*<\/span>)<\/span>td)<\/span>;<\/span>
              \n \/\/ \u6211\u4eec\u8fd9\u91cc\u4e0d\u8981\u53bb\u7b49\u5f85, \u800c\u662f\u5728\u56de\u8c03\u7684\u51fd\u6570\u91cc\u9762\u4f7f\u7528\u7ebf\u7a0b\u5206\u79bb<\/span><\/p>\n

              \/\/ ==============================================================================<\/span>
              \n \/\/ \u3010Version 1 — \u591a\u8fdb\u7a0b\u7248\u672c (\u5df2\u6ce8\u91ca)\u3011<\/span>
              \n \/\/ \u4f18\u52bf：\u8fdb\u7a0b\u95f4\u5f3a\u9694\u79bb，\u4e00\u4e2a\u5b50\u8fdb\u7a0b\u5d29\u6e83\u4e0d\u4f1a\u6ce2\u53ca\u4e3b\u8fdb\u7a0b\u548c\u5176\u4ed6\u5ba2\u6237\u7aef\u3002<\/span>
              \n \/\/ \u52a3\u52bf：\u6bcf\u6b21 fork \u5f00\u9500\u8f83\u5927，\u4e0d\u9002\u5408\u9ad8\u5e76\u53d1\u6d77\u91cf\u8fde\u63a5\u3002<\/span>
              \n \/\/ ==============================================================================<\/span>
              \n \/\/ pid_t pid = fork();<\/span>
              \n \/\/ if(pid < 0)<\/span>
              \n \/\/ {<\/span>
              \n \/\/ LOG(LogLevel::ERROR) << "fork error";<\/span>
              \n \/\/ close(sockfd);<\/span>
              \n \/\/ }<\/span>
              \n \/\/ else if(pid == 0)<\/span>
              \n \/\/ {<\/span>
              \n \/\/ \/\/ \u5b50\u8fdb\u7a0b,\u62f7\u8d1d\u7236\u8fdb\u7a0b\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868，\u4ece\u800c\u548c\u7236\u8fdb\u7a0b\u770b\u5230\u540c\u4e00\u6279\u6587\u4ef6<\/span>
              \n \/\/ \/\/ \u5173\u95ed\u81ea\u5df1\u4e0d\u9700\u8981\u7684\u6587\u4ef6fd (\u5b50\u8fdb\u7a0b\u53ea\u8d1f\u8d23\u901a\u4fe1，\u4e0d\u9700\u8981\u76d1\u542c\u62c9\u5ba2)<\/span>
              \n \/\/ close(_listensockfd);<\/span>
              \n \/\/ \/\/ **************************************<\/span>
              \n \/\/ \/\/ \u4f18\u96c5\u5904\u7406\u50f5\u5c38\u8fdb\u7a0b\u7684\u65b9\u6848\u4e8c：\u5b59\u5b50\u8fdb\u7a0b\u6cd5 (\u4e24\u6b21 fork)<\/span>
              \n \/\/ \/\/ if(fork() > 0)<\/span>
              \n \/\/ \/\/ exit(0); \/\/ \u5b50\u8fdb\u7a0b\u76f4\u63a5\u9000\u51fa，\u8ba9\u5b59\u5b50\u8fdb\u7a0b\u53d8\u6210\u5b64\u513f\u8fdb\u7a0b，\u7531\u7cfb\u7edf init\/systemd \u63a5\u7ba1\u56de\u6536<\/span>
              \n \/\/ \/\/ \/\/ \u5b59\u5b50\u8fdb\u7a0b — \u4f60\u53bb\u6267\u884c<\/span>
              \n \/\/ \/\/ Service(sockfd, clientaddress);<\/span>
              \n \/\/ \/\/ **************************************<\/span>
              \n \/\/ Service(sockfd, clientaddress);<\/span>
              \n \/\/ exit(0); \/\/ \u4e1a\u52a1\u5904\u7406\u5b8c\u6bd5，\u5b50\u8fdb\u7a0b\u9000\u51fa<\/span>
              \n \/\/ }<\/span>
              \n \/\/ else{}<\/span>
              \n \/\/ \/\/ \u7236\u8fdb\u7a0b\u4e0d\u9700\u8981\u8fd9\u4e2a：\u7236\u8fdb\u7a0b\u5df2\u7ecf\u628a\u8fd9\u4e2a\u5ba2\u6237\u7aef\u4ea4\u7ed9\u4e86\u5b50\u8fdb\u7a0b\u5904\u7406，\u81ea\u5df1\u5fc5\u987b\u5173\u95ed，\u5426\u5219\u4f1a\u5bfc\u81f4 fd \u8017\u5c3d<\/span>
              \n \/\/ close(sockfd);<\/span>
              \n \/\/ \/\/ \u7236\u8fdb\u7a0b<\/span>
              \n \/\/ pid_t rid = waitpid(pid, nullptr, 0); \/\/ \u5982\u679c\u8fd9\u91cc\u963b\u585e\u7b49\u5f85，\u5c31\u53c8\u53d8\u6210\u4e86\u4e32\u884c\u3002\u82e5\u7528\u5b59\u5b50\u8fdb\u7a0b\u6cd5，\u8fd9\u91cc\u4f1a\u77ac\u95f4\u8fd4\u56de<\/span><\/p>\n

              \/\/ ==============================================================================<\/span>
              \n \/\/ \u3010Version 0 — \u5355\u8fdb\u7a0b\u4e32\u884c\u7248\u672c (\u5df2\u6ce8\u91ca)\u3011<\/span>
              \n \/\/ \u81f4\u547d\u7f3a\u9677：Service \u5185\u90e8\u662f\u6b7b\u5faa\u73af，\u4f1a\u5bfc\u81f4\u4e3b\u8fdb\u7a0b\u5361\u6b7b\u5728\u8fd9\u91cc，\u6c38\u8fdc\u65e0\u6cd5\u6267\u884c\u4e0b\u4e00\u6b21 accept \u63a5\u5f85\u65b0\u5ba2\u4eba\u3002<\/span>
              \n \/\/ \u4e00\u822c\u6839\u672c\u4e0d\u4f1a\u4f7f\u7528\u8fd9\u79cd\u957f\u8fde\u63a5\u7684\u5355\u8fdb\u7a0b\u5199\u6cd5\u3002<\/span>
              \n \/\/ ==============================================================================<\/span>
              \n \/\/ Service(sockfd, clientaddress);<\/span>
              \n }<\/span>
              \n }<\/span>
              \n ~<\/span>TcpEchoServer<\/span>(<\/span>)<\/span>{<\/span>}<\/span>
              \nprivate<\/span>:<\/span>
              \n uint16_t<\/span> _port;<\/span> \/\/ \u670d\u52a1\u5668\u7ed1\u5b9a\u7684\u7aef\u53e3\u53f7<\/span>
              \n int<\/span> _listensockfd;<\/span> \/\/ \u76d1\u542c\u5957\u63a5\u5b57 (\u62c9\u5ba2\u7ecf\u7406)<\/span>
              \n}<\/span>;<\/span>
              \n#<\/span>endif<\/span><\/span><\/p>\n

              \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                \n
              • TcpEchoServer.cpp<\/li>\n<\/ul>\n

                #<\/span>include<\/span> "TcpEchoServer.hpp"<\/span><\/span>
                \n#<\/span>include<\/span> "Logger.hpp"<\/span><\/span>
                \n#<\/span>include<\/span> <cstdint><\/span><\/span>
                \n#<\/span>include<\/span> <memory><\/span> \/\/ \u5f15\u5165 <memory> \u5e93\u4ee5\u63d0\u4f9b\u667a\u80fd\u6307\u9488 std::unique_ptr \u7684\u652f\u6301<\/span><\/span><\/p>\n

                \/\/ \u6253\u5370\u7a0b\u5e8f\u7684\u4f7f\u7528\u8bf4\u660e\u624b\u518c<\/span>
                \n\/\/ \u5f53\u7528\u6237\u5728\u547d\u4ee4\u884c\u542f\u52a8\u7a0b\u5e8f\u65f6\u5982\u679c\u6ca1\u6709\u5e26\u4e0a\u6b63\u786e\u7684\u53c2\u6570，\u8c03\u7528\u6b64\u51fd\u6570\u8fdb\u884c\u63d0\u793a<\/span>
                \nvoid<\/span> Usage<\/span>(<\/span>std::<\/span>string procname)<\/span>
                \n{<\/span>
                \n \/\/ procname \u63a5\u6536\u7684\u901a\u5e38\u662f argv[0]，\u5373\u7a0b\u5e8f\u672c\u8eab\u7684\u8fd0\u884c\u8def\u5f84\u548c\u540d\u79f0<\/span>
                \n std::<\/span>cout <<<\/span> "Usage: "<\/span> <<<\/span> procname <<<\/span> " ServerPort"<\/span> <<<\/span> std::<\/span>endl;<\/span>
                \n}<\/span><\/p>\n

                \/\/ .\/tcp_echo_server 8080<\/span>
                \nint<\/span> main<\/span>(<\/span>int<\/span> argc,<\/span> char<\/span> *<\/span>argv[<\/span>]<\/span>)<\/span>
                \n{<\/span>
                \n \/\/ 1. \u53c2\u6570\u6821\u9a8c：\u68c0\u67e5\u547d\u4ee4\u884c\u53c2\u6570\u7684\u4e2a\u6570<\/span>
                \n \/\/ argc \u5fc5\u987b\u7b49\u4e8e 2\u3002\u56e0\u4e3a argv[0] \u662f ".\/tcp_echo_server" (\u7a0b\u5e8f\u540d)，argv[1] \u662f "8080" (\u7aef\u53e3\u53f7)<\/span>
                \n if<\/span>(<\/span>argc !=<\/span> 2<\/span>)<\/span>
                \n {<\/span>
                \n Usage<\/span>(<\/span>argv[<\/span>0<\/span>]<\/span>)<\/span>;<\/span>
                \n exit<\/span>(<\/span>1<\/span>)<\/span>;<\/span> \/\/ \u6821\u9a8c\u5931\u8d25，\u5f02\u5e38\u9000\u51fa\u7a0b\u5e8f，\u8fd4\u56de\u72b6\u6001\u7801 1<\/span>
                \n }<\/span><\/p>\n

                \/\/ 2. \u521d\u59cb\u5316\u65e5\u5fd7\u7cfb\u7edf<\/span>
                \n \/\/ \u542f\u7528\u63a7\u5236\u53f0\u65e5\u5fd7\u8f93\u51fa\u7b56\u7565，\u540e\u7eed\u5e95\u5c42\u8c03\u7528\u7684 LOG() \u5b8f\u90fd\u4f1a\u5c06\u4fe1\u606f\u76f4\u63a5\u6253\u5370\u5230\u663e\u793a\u5668\u4e0a<\/span>
                \n ENABLE_CONSOLE_LOG_STRATEGY<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

                \/\/ 3. \u89e3\u6790\u5e76\u8f6c\u6362\u7aef\u53e3\u53f7<\/span>
                \n \/\/ argv[1] \u62ff\u5230\u7684 "8080" \u53ea\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32，\u9700\u8981\u901a\u8fc7 std::stoi (string to integer) \u8f6c\u6362\u4e3a 16\u4f4d\u65e0\u7b26\u53f7\u6574\u6570<\/span>
                \n uint16_t<\/span> ServerPort =<\/span> std::<\/span>stoi<\/span>(<\/span>argv[<\/span>1<\/span>]<\/span>)<\/span>;<\/span><\/p>\n

                \/\/ 4. \u5b9e\u4f8b\u5316\u670d\u52a1\u5668\u5bf9\u8c61 (\u73b0\u4ee3 C++ \u6700\u4f73\u5b9e\u8df5：\u667a\u80fd\u6307\u9488)<\/span>
                \n \/\/ std::make_unique \u662f C++14 \u5f15\u5165\u7684\u5de5\u5382\u51fd\u6570，\u5b83\u5b89\u5168\u5730\u5728\u5806\u4e0a\u521b\u5efa\u5bf9\u8c61，\u5e76\u4ea4\u7531 unique_ptr \u7ba1\u7406\u3002<\/span>
                \n \/\/ \u597d\u5904 (RAII \u673a\u5236)：\u6211\u4eec\u4e0d\u9700\u8981\u624b\u52a8\u53bb\u5199 delete tsvr\u3002\u5f53 main \u51fd\u6570\u8fd0\u884c\u7ed3\u675f\u65f6，<\/span>
                \n \/\/ \u667a\u80fd\u6307\u9488\u4f1a\u81ea\u52a8\u8c03\u7528 TcpEchoServer \u7684\u6790\u6784\u51fd\u6570\u5e76\u91ca\u653e\u5806\u5185\u5b58，\u5f7b\u5e95\u675c\u7edd\u5185\u5b58\u6cc4\u6f0f\u3002<\/span>
                \n std::<\/span>unique_ptr<<\/span>TcpEchoServer><\/span> tsvr =<\/span> std::<\/span>make_unique<\/span><<\/span>TcpEchoServer><\/span><\/span><\/span>(<\/span>ServerPort)<\/span>;<\/span><\/p>\n

                \/\/ 5. \u9a71\u52a8\u670d\u52a1\u5668\u751f\u547d\u5468\u671f<\/span>
                \n \/\/ \u7b2c\u4e00\u6b65：Init()\u3002\u5728\u5e95\u5c42\u6267\u884c socket() -> bind() -> listen()，\u5b8c\u6210\u670d\u52a1\u7aef\u7f51\u5361\u7684\u201c\u6302\u53f7\u5f85\u547d\u201d\u3002<\/span>
                \n tsvr-><\/span>Init<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

                \/\/ \u7b2c\u4e8c\u6b65：Start()\u3002\u8fdb\u5165\u6b7b\u5faa\u73af，\u5f00\u59cb accept() \u63a5\u5f85\u5ba2\u6237\u7aef，\u5e76\u6839\u636e\u914d\u7f6e(\u5355\u8fdb\u7a0b\/\u591a\u8fdb\u7a0b\/\u591a\u7ebf\u7a0b)\u63d0\u4f9b\u8bfb\u5199\u670d\u52a1\u3002<\/span>
                \n tsvr-><\/span>Start<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

                return<\/span> 0<\/span>;<\/span> \/\/ \u7a0b\u5e8f\u6b63\u5e38\u7ed3\u675f<\/span>
                \n}<\/span><\/p>\n

                3.2 V1 \u7248\u672c：\u5355\u8fdb\u7a0b\u57fa\u7840\u7248 EchoServer<\/h3>\n

                \u5b9e\u73b0\u601d\u8def：\u9075\u5faa TCP \u670d\u52a1\u7aef\u56db\u6b65\u6838\u5fc3\u6d41\u7a0b，\u5355\u8fdb\u7a0b\u5faa\u73af\u63a5\u6536\u5ba2\u6237\u7aef\u8fde\u63a5，\u8fde\u63a5\u5efa\u7acb\u540e\u540c\u6b65\u5904\u7406\u5ba2\u6237\u7aef\u7684\u8bfb\u5199\u8bf7\u6c42，\u5b9e\u73b0\u57fa\u7840\u7684\u56de\u663e\u529f\u80fd\u3002<\/p>\n

                \u6838\u5fc3\u6e90\u7801\u7247\u6bb5<\/p>\n

                \/\/ \u6838\u5fc3\u4e1a\u52a1：\u56de\u663e\u670d\u52a1<\/span>
                \nvoid<\/span> Service<\/span>(<\/span>int<\/span> sockfd,<\/span> InetAddr client)<\/span>
                \n{<\/span>
                \n \/\/ TCP\u957f\u8fde\u63a5\u5faa\u73af\u8bfb\u5199<\/span>
                \n while<\/span> (<\/span>true<\/span>)<\/span>
                \n {<\/span>
                \n char<\/span> inbuffer[<\/span>1024<\/span>]<\/span>;<\/span>
                \n \/\/ 1. \u8bfb\u53d6\u5ba2\u6237\u7aef\u6570\u636e<\/span>
                \n int<\/span> n =<\/span> read<\/span>(<\/span>sockfd,<\/span> inbuffer,<\/span> sizeof<\/span>(<\/span>inbuffer)<\/span> –<\/span> 1<\/span>)<\/span>;<\/span>
                \n if<\/span>(<\/span>n ><\/span> 0<\/span>)<\/span>
                \n {<\/span>
                \n inbuffer[<\/span>n]<\/span> =<\/span> 0<\/span>;<\/span>
                \n LOG<\/span>(<\/span>LogLevel::<\/span>INFO)<\/span> <<<\/span> client.<\/span>StringAddress<\/span>(<\/span>)<\/span> <<<\/span> " say# "<\/span> <<<\/span> inbuffer;<\/span>
                \n }<\/span>
                \n else<\/span> if<\/span>(<\/span>n ==<\/span> 0<\/span>)<\/span> \/\/ \u5bf9\u7aef\u5173\u95ed\u8fde\u63a5<\/span>
                \n {<\/span>
                \n LOG<\/span>(<\/span>LogLevel::<\/span>INFO)<\/span> <<<\/span> client.<\/span>StringAddress<\/span>(<\/span>)<\/span> <<<\/span> " close connection"<\/span>;<\/span>
                \n break<\/span>;<\/span>
                \n }<\/span>
                \n else<\/span> \/\/ \u8bfb\u53d6\u5f02\u5e38<\/span>
                \n {<\/span>
                \n LOG<\/span>(<\/span>LogLevel::<\/span>ERROR)<\/span> <<<\/span> "read socket error"<\/span>;<\/span>
                \n break<\/span>;<\/span>
                \n }<\/span>
                \n \/\/ 2. \u56de\u5199\u6570\u636e\u7ed9\u5ba2\u6237\u7aef<\/span>
                \n std::<\/span>string echo_string =<\/span> "server echo# "<\/span>;<\/span>
                \n echo_string +=<\/span> inbuffer;<\/span>
                \n write<\/span>(<\/span>sockfd,<\/span> echo_string.<\/span>c_str<\/span>(<\/span>)<\/span>,<\/span> echo_string.<\/span>size<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
                \n }<\/span>
                \n close<\/span>(<\/span>sockfd)<\/span>;<\/span> \/\/ \u5173\u95edIO\u5957\u63a5\u5b57<\/span>
                \n}<\/span><\/p>\n

                \/\/ \u670d\u52a1\u542f\u52a8\u4e3b\u5faa\u73af<\/span>
                \nvoid<\/span> Start<\/span>(<\/span>)<\/span>
                \n{<\/span>
                \n while<\/span>(<\/span>true<\/span>)<\/span>
                \n {<\/span>
                \n struct<\/span> sockaddr_in<\/span> clientaddr;<\/span>
                \n socklen_t len =<\/span> sizeof<\/span>(<\/span>clientaddr)<\/span>;<\/span>
                \n \/\/ \u83b7\u53d6\u5df2\u5efa\u7acb\u7684\u5ba2\u6237\u7aef\u8fde\u63a5<\/span>
                \n int<\/span> sockfd =<\/span> accept<\/span>(<\/span>_listensockfd,<\/span> (<\/span>struct<\/span> sockaddr<\/span> *<\/span>)<\/span>&<\/span>clientaddr,<\/span> &<\/span>len)<\/span>;<\/span>
                \n if<\/span> (<\/span>sockfd <<\/span> 0<\/span>)<\/span>
                \n {<\/span>
                \n LOG<\/span>(<\/span>LogLevel::<\/span>WARNING)<\/span> <<<\/span> "accept error"<\/span>;<\/span>
                \n continue<\/span>;<\/span>
                \n }<\/span>
                \n InetAddr clientaddress<\/span>(<\/span>clientaddr)<\/span>;<\/span>
                \n LOG<\/span>(<\/span>LogLevel::<\/span>INFO)<\/span> <<<\/span> "get a new link: "<\/span> <<<\/span> clientaddress.<\/span>StringAddress<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

                \/\/ \u540c\u6b65\u5904\u7406\u4e1a\u52a1，\u963b\u585e\u4e3b\u5faa\u73af<\/span>
                \n Service<\/span>(<\/span>sockfd,<\/span> clientaddress)<\/span>;<\/span>
                \n }<\/span>
                \n}<\/span><\/p>\n

                \u6e90\u7801\u6838\u5fc3\u89e3\u8bfb<\/p>\n

                  \n
                • \u76d1\u542c\u5957\u63a5\u5b57\u4e0e IO \u5957\u63a5\u5b57\u5206\u79bb：_listensockfd\u662f\u76d1\u542c\u5957\u63a5\u5b57，\u4ec5\u7528\u4e8e\u63a5\u6536\u5ba2\u6237\u7aef\u8fde\u63a5；accept\u8fd4\u56de\u7684sockfd\u662f\u4e13\u5c5e IO \u5957\u63a5\u5b57，\u7528\u4e8e\u548c\u5bf9\u5e94\u5ba2\u6237\u7aef\u7684\u53cc\u5411\u6570\u636e\u4f20\u8f93，\u8fd9\u662f TCP \u5e76\u53d1\u7f16\u7a0b\u7684\u6838\u5fc3\u8bbe\u8ba1\u3002<\/li>\n
                • read \u8fd4\u56de\u503c\u5904\u7406：n>0\u4e3a\u6210\u529f\u8bfb\u53d6\u7684\u5b57\u8282\u6570，n=0\u8868\u793a\u5ba2\u6237\u7aef\u5173\u95ed\u4e86\u8fde\u63a5，n<0\u8868\u793a\u8bfb\u53d6\u5f02\u5e38，\u4e09\u79cd\u60c5\u51b5\u5fc5\u987b\u5206\u522b\u5904\u7406，\u5426\u5219\u4f1a\u5bfc\u81f4\u8fde\u63a5\u6cc4\u6f0f\u6216\u7a0b\u5e8f\u5d29\u6e83\u3002<\/li>\n
                • \u7248\u672c\u6838\u5fc3\u7f3a\u9677：\u5355\u8fdb\u7a0b\u4e32\u884c\u5904\u7406，Service\u51fd\u6570\u4f1a\u963b\u585e\u4e3b\u5faa\u73af，\u540c\u4e00\u65f6\u95f4\u53ea\u80fd\u5904\u7406\u4e00\u4e2a\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u4e0e\u8bf7\u6c42，\u65e0\u6cd5\u652f\u6301\u591a\u5ba2\u6237\u7aef\u5e76\u53d1\u8bbf\u95ee\u3002 \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/li>\n<\/ul>\n

                  3.2 V2 \u7248\u672c：\u591a\u8fdb\u7a0b\u5e76\u53d1\u7248 EchoServer<\/h3>\n

                  \u5b9e\u73b0\u601d\u8def：accept\u83b7\u53d6\u65b0\u8fde\u63a5\u540e，\u901a\u8fc7fork()\u521b\u5efa\u5b50\u8fdb\u7a0b\u5904\u7406\u5ba2\u6237\u7aef\u4e1a\u52a1，\u7236\u8fdb\u7a0b\u7ee7\u7eed\u5faa\u73af\u76d1\u542c\u65b0\u8fde\u63a5，\u5b9e\u73b0\u591a\u5ba2\u6237\u7aef\u5e76\u53d1\u5904\u7406\u3002<\/p>\n

                  \u6838\u5fc3\u6e90\u7801\u7247\u6bb5<\/p>\n

                  void<\/span> Start<\/span>(<\/span>)<\/span>
                  \n{<\/span>
                  \n \/\/ \u5ffd\u7565\u5b50\u8fdb\u7a0b\u9000\u51fa\u4fe1\u53f7，\u81ea\u52a8\u56de\u6536\u50f5\u5c38\u8fdb\u7a0b，\u6700\u4f73\u5b9e\u8df5<\/span>
                  \n signal<\/span>(<\/span>SIGCHLD,<\/span> SIG_IGN)<\/span>;<\/span>
                  \n while<\/span>(<\/span>true<\/span>)<\/span>
                  \n {<\/span>
                  \n struct<\/span> sockaddr_in<\/span> clientaddr;<\/span>
                  \n socklen_t len =<\/span> sizeof<\/span>(<\/span>clientaddr)<\/span>;<\/span>
                  \n int<\/span> sockfd =<\/span> accept<\/span>(<\/span>_listensockfd,<\/span> (<\/span>struct<\/span> sockaddr<\/span> *<\/span>)<\/span>&<\/span>clientaddr,<\/span> &<\/span>len)<\/span>;<\/span>
                  \n if<\/span> (<\/span>sockfd <<\/span> 0<\/span>)<\/span>
                  \n {<\/span>
                  \n LOG<\/span>(<\/span>LogLevel::<\/span>WARNING)<\/span> <<<\/span> "accept error"<\/span>;<\/span>
                  \n continue<\/span>;<\/span>
                  \n }<\/span>
                  \n InetAddr clientaddress<\/span>(<\/span>clientaddr)<\/span>;<\/span>
                  \n LOG<\/span>(<\/span>LogLevel::<\/span>INFO)<\/span> <<<\/span> "get a new link: "<\/span> <<<\/span> clientaddress.<\/span>StringAddress<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

                  \/\/ \u521b\u5efa\u5b50\u8fdb\u7a0b\u5904\u7406\u4e1a\u52a1<\/span>
                  \n pid_t pid =<\/span> fork<\/span>(<\/span>)<\/span>;<\/span>
                  \n if<\/span>(<\/span>pid ==<\/span> 0<\/span>)<\/span> \/\/ \u5b50\u8fdb\u7a0b<\/span>
                  \n {<\/span>
                  \n close<\/span>(<\/span>_listensockfd)<\/span>;<\/span> \/\/ \u5b50\u8fdb\u7a0b\u4e0d\u9700\u8981\u76d1\u542c\u5957\u63a5\u5b57，\u5173\u95ed\u907f\u514d\u8d44\u6e90\u6cc4\u6f0f<\/span>
                  \n Service<\/span>(<\/span>sockfd,<\/span> clientaddress)<\/span>;<\/span> \/\/ \u5904\u7406\u5ba2\u6237\u7aef\u4e1a\u52a1<\/span>
                  \n exit<\/span>(<\/span>0<\/span>)<\/span>;<\/span> \/\/ \u4e1a\u52a1\u5904\u7406\u5b8c\u6bd5\u5b50\u8fdb\u7a0b\u9000\u51fa<\/span>
                  \n }<\/span>
                  \n \/\/ \u7236\u8fdb\u7a0b<\/span>
                  \n close<\/span>(<\/span>sockfd)<\/span>;<\/span> \/\/ \u7236\u8fdb\u7a0b\u4e0d\u9700\u8981IO\u5957\u63a5\u5b57，\u5173\u95ed\u6587\u4ef6\u63cf\u8ff0\u7b26<\/span>
                  \n }<\/span>
                  \n}<\/span><\/p>\n

                  \u6e90\u7801\u6838\u5fc3\u89e3\u8bfb<\/p>\n

                    \n
                  • \u50f5\u5c38\u8fdb\u7a0b\u5904\u7406：\u901a\u8fc7signal(SIGCHLD, SIG_IGN)\u8ba9\u64cd\u4f5c\u7cfb\u7edf\u81ea\u52a8\u56de\u6536\u9000\u51fa\u7684\u5b50\u8fdb\u7a0b，\u907f\u514d\u50f5\u5c38\u8fdb\u7a0b\u5360\u7528\u7cfb\u7edf\u8d44\u6e90，\u662f Linux \u591a\u8fdb\u7a0b\u670d\u52a1\u7684\u6700\u4f73\u5b9e\u8df5\u3002\u4e5f\u53ef\u4ee5\u4f7f\u7528\u6211\u4eec\u4e0a\u9762\u5199\u7684\u5b59\u5b50\u8fdb\u7a0b\u7684\u65b9\u5f0f<\/li>\n
                  • \u6587\u4ef6\u63cf\u8ff0\u7b26\u7ba1\u7406：\u7236\u5b50\u8fdb\u7a0b\u4f1a\u5171\u4eab\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868，\u5b50\u8fdb\u7a0b\u5fc5\u987b\u5173\u95ed\u4e0d\u9700\u8981\u7684\u76d1\u542c\u5957\u63a5\u5b57，\u7236\u8fdb\u7a0b\u5fc5\u987b\u5173\u95ed\u4e0d\u9700\u8981\u7684 IO \u5957\u63a5\u5b57，\u5426\u5219\u4f1a\u5bfc\u81f4\u6587\u4ef6\u63cf\u8ff0\u7b26\u6cc4\u6f0f\u3002<\/li>\n
                  • \u7248\u672c\u4f18\u7f3a\u70b9：\u4f18\u70b9\u662f\u5b9e\u73b0\u7b80\u5355，\u8fdb\u7a0b\u95f4\u5730\u5740\u7a7a\u95f4\u9694\u79bb，\u5355\u4e2a\u5ba2\u6237\u7aef\u4e1a\u52a1\u5d29\u6e83\u4e0d\u4f1a\u5f71\u54cd\u6574\u4e2a\u670d\u52a1；\u7f3a\u70b9\u662f\u8fdb\u7a0b\u521b\u5efa \/ \u9500\u6bc1\u5f00\u9500\u5927，\u5e76\u53d1\u91cf\u8fc7\u9ad8\u65f6\u7cfb\u7edf\u8d44\u6e90\u5360\u7528\u4e25\u91cd\u3002<\/li>\n<\/ul>\n

                    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                    3.3 V3 \u7248\u672c：\u591a\u7ebf\u7a0b\u9ad8\u5e76\u53d1\u7248 EchoServer<\/h3>\n

                    \u5b9e\u73b0\u601d\u8def：accept\u83b7\u53d6\u65b0\u8fde\u63a5\u540e，\u521b\u5efa\u72ec\u7acb\u7684\u5b50\u7ebf\u7a0b\u5904\u7406\u5ba2\u6237\u7aef\u4e1a\u52a1，\u4e3b\u7ebf\u7a0b\u7ee7\u7eed\u76d1\u542c\u65b0\u8fde\u63a5，\u901a\u8fc7\u7ebf\u7a0b\u5206\u79bb\u5b9e\u73b0\u81ea\u52a8\u8d44\u6e90\u56de\u6536，\u517c\u987e\u9ad8\u5e76\u53d1\u4e0e\u4f4e\u8d44\u6e90\u5f00\u9500\u3002<\/p>\n

                    \u6838\u5fc3\u6e90\u7801\u7247\u6bb5<\/p>\n

                    \/\/ \u7ebf\u7a0b\u53c2\u6570\u4f20\u9012\u7c7b<\/span>
                    \nclass<\/span> ThreadData<\/span>
                    \n{<\/span>
                    \npublic<\/span>:<\/span>
                    \n ThreadData<\/span>(<\/span>int<\/span> sockfd,<\/span> InetAddr addr,<\/span> TcpEchoServer *<\/span>owner)<\/span>
                    \n :<\/span> _sockfd<\/span>(<\/span>sockfd)<\/span>,<\/span> _address<\/span>(<\/span>addr)<\/span>,<\/span> _owner<\/span>(<\/span>owner)<\/span> {<\/span>}<\/span>
                    \npublic<\/span>:<\/span>
                    \n int<\/span> _sockfd;<\/span>
                    \n InetAddr _address;<\/span>
                    \n TcpEchoServer *<\/span>_owner;<\/span> \/\/ \u4f20\u9012this\u6307\u9488，\u8bbf\u95ee\u7c7b\u5185\u6210\u5458\u65b9\u6cd5<\/span>
                    \n}<\/span>;<\/span><\/p>\n

                    \/\/ \u7ebf\u7a0b\u5165\u53e3\u51fd\u6570\u5fc5\u987b\u4e3a\u9759\u6001，\u65e0\u9690\u542bthis\u6307\u9488，\u9002\u914dpthread\u5e93\u63a5\u53e3<\/span>
                    \nstatic<\/span> void<\/span>*<\/span> threadRun<\/span>(<\/span>void<\/span>*<\/span> args)<\/span>
                    \n{<\/span>
                    \n \/\/ \u7ebf\u7a0b\u5206\u79bb：\u7ebf\u7a0b\u9000\u51fa\u65f6\u7cfb\u7edf\u81ea\u52a8\u56de\u6536\u8d44\u6e90，\u65e0\u9700\u4e3b\u7ebf\u7a0bjoin<\/span>
                    \n pthread_detach<\/span>(<\/span>pthread_self<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
                    \n ThreadData *<\/span>td =<\/span> static_cast<\/span><<\/span>ThreadData *<\/span>><\/span><\/span><\/span>(<\/span>args)<\/span>;<\/span>
                    \n \/\/ \u8c03\u7528\u4e1a\u52a1\u5904\u7406\u65b9\u6cd5<\/span>
                    \n td-><\/span>_owner-><\/span>Service<\/span>(<\/span>td-><\/span>_sockfd,<\/span> td-><\/span>_address)<\/span>;<\/span>
                    \n \/\/ \u91ca\u653e\u5806\u4e0a\u7684\u53c2\u6570\u5bf9\u8c61<\/span>
                    \n delete<\/span> td;<\/span>
                    \n close<\/span>(<\/span>td-><\/span>_sockfd)<\/span>;<\/span>
                    \n return<\/span> nullptr<\/span>;<\/span>
                    \n}<\/span><\/p>\n

                    \/\/ \u670d\u52a1\u542f\u52a8\u4e3b\u5faa\u73af<\/span>
                    \nvoid<\/span> Start<\/span>(<\/span>)<\/span>
                    \n{<\/span>
                    \n while<\/span>(<\/span>true<\/span>)<\/span>
                    \n {<\/span>
                    \n struct<\/span> sockaddr_in<\/span> clientaddr;<\/span>
                    \n socklen_t len =<\/span> sizeof<\/span>(<\/span>clientaddr)<\/span>;<\/span>
                    \n int<\/span> sockfd =<\/span> accept<\/span>(<\/span>_listensockfd,<\/span> (<\/span>struct<\/span> sockaddr<\/span> *<\/span>)<\/span>&<\/span>clientaddr,<\/span> &<\/span>len)<\/span>;<\/span>
                    \n if<\/span> (<\/span>sockfd <<\/span> 0<\/span>)<\/span>
                    \n {<\/span>
                    \n LOG<\/span>(<\/span>LogLevel::<\/span>WARNING)<\/span> <<<\/span> "accept error"<\/span>;<\/span>
                    \n continue<\/span>;<\/span>
                    \n }<\/span>
                    \n InetAddr clientaddress<\/span>(<\/span>clientaddr)<\/span>;<\/span>
                    \n LOG<\/span>(<\/span>LogLevel::<\/span>INFO)<\/span> <<<\/span> "get a new link: "<\/span> <<<\/span> clientaddress.<\/span>StringAddress<\/span>(<\/span>)<\/span> <<<\/span> " sockfd: "<\/span> <<<\/span> sockfd;<\/span><\/p>\n

                    \/\/ \u521b\u5efa\u5b50\u7ebf\u7a0b\u5904\u7406\u4e1a\u52a1<\/span>
                    \n pthread_t tid;<\/span>
                    \n ThreadData*<\/span> td =<\/span> new<\/span> ThreadData<\/span>(<\/span>sockfd,<\/span> clientaddress,<\/span> this<\/span>)<\/span>;<\/span>
                    \n pthread_create<\/span>(<\/span>&<\/span>tid,<\/span> nullptr<\/span>,<\/span> threadRun,<\/span> (<\/span>void<\/span>*<\/span>)<\/span>td)<\/span>;<\/span>
                    \n }<\/span>
                    \n}<\/span><\/p>\n

                    \u6e90\u7801\u6838\u5fc3\u89e3\u8bfb<\/p>\n

                      \n
                    • \u9759\u6001\u7ebf\u7a0b\u5165\u53e3\u51fd\u6570：pthread \u5e93\u8981\u6c42\u7ebf\u7a0b\u5165\u53e3\u51fd\u6570\u5fc5\u987b\u662fvoid* (*)(void*)\u683c\u5f0f，\u7c7b\u7684\u666e\u901a\u6210\u5458\u51fd\u6570\u9690\u542b this \u6307\u9488，\u56e0\u6b64\u5fc5\u987b\u8bbe\u4e3a\u9759\u6001\u51fd\u6570，\u901a\u8fc7\u53c2\u6570\u4f20\u9012 this \u6307\u9488\u8bbf\u95ee\u7c7b\u5185\u6210\u5458\u3002<\/li>\n
                    • \u7ebf\u7a0b\u5206\u79bb\u673a\u5236：pthread_detach(pthread_self())\u5c06\u7ebf\u7a0b\u8bbe\u7f6e\u4e3a\u5206\u79bb\u72b6\u6001，\u7ebf\u7a0b\u9000\u51fa\u65f6\u7cfb\u7edf\u81ea\u52a8\u56de\u6536\u8d44\u6e90，\u65e0\u9700\u4e3b\u7ebf\u7a0b\u8c03\u7528pthread_join\u963b\u585e\u7b49\u5f85，\u907f\u514d\u4e3b\u7ebf\u7a0b\u963b\u585e\u3002<\/li>\n
                    • \u7ebf\u7a0b\u8d44\u6e90\u7ba1\u7406：ThreadData \u5bf9\u8c61\u5728\u5806\u4e0a\u521b\u5efa，\u5728\u7ebf\u7a0b\u4e1a\u52a1\u5904\u7406\u5b8c\u6bd5\u540e\u91ca\u653e，\u907f\u514d\u5185\u5b58\u6cc4\u6f0f；\u591a\u7ebf\u7a0b\u5171\u4eab\u8fdb\u7a0b\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868，\u56e0\u6b64\u65e0\u9700\u5173\u95ed\u76d1\u542c\u5957\u63a5\u5b57，\u4ec5\u9700\u5728\u4e1a\u52a1\u5904\u7406\u5b8c\u6bd5\u540e\u5173\u95ed IO \u5957\u63a5\u5b57\u3002<\/li>\n
                    • \u7248\u672c\u4f18\u52bf：\u7ebf\u7a0b\u521b\u5efa \/ \u9500\u6bc1\u5f00\u9500\u8fdc\u5c0f\u4e8e\u8fdb\u7a0b，\u652f\u6301\u66f4\u9ad8\u7684\u5e76\u53d1\u91cf，\u591a\u7ebf\u7a0b\u5171\u4eab\u8fdb\u7a0b\u5730\u5740\u7a7a\u95f4，\u6570\u636e\u4ea4\u4e92\u66f4\u4fbf\u6377，\u662f TCP \u9ad8\u5e76\u53d1\u670d\u52a1\u7684\u4e3b\u6d41\u57fa\u7840\u65b9\u6848\u3002<\/li>\n<\/ul>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                        \n
                      • \u7ebf\u7a0b\u6c60\u7248\u672c\u7684\u8be6\u7ec6\u4ecb\u7ecd\u6211\u4eec\u540e\u7eed\u518d\u8bb2<\/li>\n<\/ul>\n

                        \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                        \n

                        \u56db. TCP \u7f16\u7a0b\u6838\u5fc3\u8e29\u5751\u4e0e\u9ad8\u9891\u9762\u8bd5\u8003\u70b9<\/h2>\n
                          \n
                        • \u76d1\u542c\u5957\u63a5\u5b57\u4e0e IO \u5957\u63a5\u5b57\u7684\u672c\u8d28\u533a\u522b：\u76d1\u542c\u5957\u63a5\u5b57\u4ec5\u7528\u4e8e\u63a5\u6536\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42，\u5168\u7a0b\u53ea\u6709\u4e00\u4e2a；IO \u5957\u63a5\u5b57\u662f\u6bcf\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u4e13\u5c5e\u7684，\u7528\u4e8e\u548c\u5bf9\u5e94\u5ba2\u6237\u7aef\u7684\u6570\u636e\u4f20\u8f93，\u6709\u591a\u5c11\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u5c31\u6709\u591a\u5c11\u4e2a IO \u5957\u63a5\u5b57\u3002<\/li>\n
                        • \u4e3a\u4ec0\u4e48\u5ba2\u6237\u7aef\u4e0d\u9700\u8981\u663e\u5f0f bind（\u540e\u9762\u8fd8\u4f1a\u8be6\u7ec6\u8bb2）？：\u670d\u52a1\u7aef\u7aef\u53e3\u5fc5\u987b\u56fa\u5b9a，\u8ba9\u5ba2\u6237\u7aef\u80fd\u591f\u627e\u5230\u670d\u52a1；\u5ba2\u6237\u7aef\u7aef\u53e3\u65e0\u9700\u56fa\u5b9a，\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u5728connect\u65f6\u81ea\u52a8\u4e3a\u5ba2\u6237\u7aef\u5206\u914d\u968f\u673a\u7a7a\u95f2\u7aef\u53e3，\u663e\u5f0f bind \u53cd\u800c\u53ef\u80fd\u5bfc\u81f4\u7aef\u53e3\u5360\u7528，\u65e0\u6cd5\u542f\u52a8\u591a\u4e2a\u5ba2\u6237\u7aef\u3002<\/li>\n
                        • TCP \u6d41\u5f0f\u4f20\u8f93\u7684\u7c98\u5305\u95ee\u9898：TCP \u662f\u9762\u5411\u5b57\u8282\u6d41\u7684\u534f\u8bae，\u65e0\u6570\u636e\u8fb9\u754c，\u591a\u6b21write\u7684\u5c0f\u6570\u636e\u5305\u53ef\u80fd\u88ab\u5185\u6838\u5408\u5e76\u53d1\u9001，\u5355\u6b21read\u53ef\u80fd\u8bfb\u53d6\u5230\u591a\u4e2a\u6570\u636e\u5305，\u9700\u8981\u5728\u5e94\u7528\u5c42\u901a\u8fc7\u56fa\u5b9a\u957f\u5ea6\u3001\u5206\u9694\u7b26\u3001\u957f\u5ea6\u5b57\u6bb5\u7b49\u65b9\u5f0f\u5b9a\u5236\u534f\u8bae\u89e3\u51b3\u3002<\/li>\n
                        • \u6587\u4ef6\u63cf\u8ff0\u7b26\u6cc4\u6f0f\u95ee\u9898：TCP \u5957\u63a5\u5b57\u662f\u7cfb\u7edf\u8d44\u6e90，\u4f7f\u7528\u5b8c\u6bd5\u5fc5\u987b\u8c03\u7528close\u5173\u95ed，\u591a\u8fdb\u7a0b \/ \u591a\u7ebf\u7a0b\u7248\u672c\u4e2d\u5fc5\u987b\u6b63\u786e\u5173\u95ed\u4e0d\u9700\u8981\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26，\u5426\u5219\u4f1a\u8017\u5c3d\u7cfb\u7edf\u6587\u4ef6\u63cf\u8ff0\u7b26\u8d44\u6e90，\u5bfc\u81f4\u65b0\u8fde\u63a5\u65e0\u6cd5\u5efa\u7acb\u3002<\/li>\n
                        • accept \u7684\u963b\u585e\u7279\u6027：accept\u9ed8\u8ba4\u662f\u963b\u585e\u7684，\u5f53\u6ca1\u6709\u5ba2\u6237\u7aef\u8fde\u63a5\u65f6\u4f1a\u4e00\u76f4\u963b\u585e，\u53ef\u901a\u8fc7 IO \u591a\u8def\u590d\u7528（select\/poll\/epoll）\u5b9e\u73b0\u975e\u963b\u585e\u7684\u8fde\u63a5\u7ba1\u7406，\u652f\u6301\u66f4\u9ad8\u7684\u5e76\u53d1\u91cf\u3002<\/li>\n<\/ul>\n
                          \n

                          \u7ed3\u5c3e：<\/h2>\n

                          🍓 \u6211\u662f\u8349\u8393\u718a Lotso！\u82e5\u8fd9\u7bc7\u6280\u672f\u5e72\u8d27\u5e2e\u4f60\u6253\u901a\u4e86\u5b66\u4e60\u4e2d\u7684\u5361\u70b9：
                          \n👀 \u3010\u5173\u6ce8\u3011\u8ddf\u6211\u4e00\u8d77\u6df1\u8015\u6280\u672f\u9886\u57df，\u4ece\u57fa\u7840\u5230\u8fdb\u9636，\u89c1\u8bc1\u6bcf\u4e00\u6b21\u6210\u957f
                          \n\u2764\ufe0f \u3010\u70b9\u8d5e\u3011\u8ba9\u4f18\u8d28\u5185\u5bb9\u88ab\u66f4\u591a\u4eba\u770b\u89c1，\u8ba9\u77e5\u8bc6\u4f20\u9012\u66f4\u6709\u529b\u91cf
                          \n\u2b50 \u3010\u6536\u85cf\u3011\u628a\u6838\u5fc3\u77e5\u8bc6\u70b9\u3001\u5b9e\u6218\u6280\u5de7\u5b58\u597d，\u9700\u8981\u65f6\u76f4\u63a5\u67e5\u3001\u968f\u65f6\u7528
                          \n💬 \u3010\u8bc4\u8bba\u3011\u5206\u4eab\u4f60\u7684\u7ecf\u9a8c\u6216\u7591\u95ee（\u6bd4\u5982\u66fe\u8e29\u8fc7\u7684\u6280\u672f\u5751？），\u4e00\u8d77\u4ea4\u6d41\u907f\u5751
                          \n🗳\ufe0f \u3010\u6295\u7968\u3011\u7528\u4f60\u7684\u9009\u62e9\u52a9\u529b\u793e\u533a\u5185\u5bb9\u65b9\u5411，\u544a\u8bc9\u5927\u5bb6\u54ea\u4e2a\u6280\u672f\u70b9\u6700\u8be5\u91cd\u70b9\u62c6\u89e3
                          \n\u6280\u672f\u4e4b\u8def\u96be\u514d\u6709\u56f0\u60d1，\u4f46\u540c\u884c\u7684\u4eba\u4f1a\u8ba9\u524d\u8fdb\u66f4\u6709\u65b9\u5411～\u613f\u6211\u4eec\u90fd\u80fd\u5728\u81ea\u5df1\u4e13\u6ce8\u7684\u9886\u57df\u91cc，\u4e00\u6b65\u6b65\u9760\u8fd1\u5fc3\u4e2d\u7684\u6280\u672f\u76ee\u6807！<\/p>\n

                          \u7ed3\u8bed：\u672c\u6587\u4ece TCP \u534f\u8bae\u7684\u6838\u5fc3\u7279\u6027\u51fa\u53d1，\u901a\u8fc7\u6f14\u8fdb\u5f0f\u7684\u601d\u8def，\u4ece\u5355\u8fdb\u7a0b\u57fa\u7840\u7248\u5230\u591a\u7ebf\u7a0b\u9ad8\u5e76\u53d1\u7248，\u5b8c\u6574\u62c6\u89e3\u4e86 TCP Echo \u56de\u663e\u670d\u52a1\u5668\u7684\u5b9e\u73b0\u5168\u6d41\u7a0b，\u540c\u65f6\u6df1\u5ea6\u89e3\u8bfb\u4e86\u6bcf\u4e2a\u7248\u672c\u7684\u8bbe\u8ba1\u601d\u8def\u3001\u6e90\u7801\u7ec6\u8282\u4e0e\u4f18\u5316\u65b9\u6848\u3002Echo \u670d\u52a1\u5668\u867d\u5c0f，\u5374\u5305\u542b\u4e86 TCP \u7f51\u7edc\u7f16\u7a0b\u7684\u6240\u6709\u6838\u5fc3\u77e5\u8bc6\u70b9，\u662f\u540e\u7eed\u5f00\u53d1 HTTP \u670d\u52a1\u5668\u3001RPC \u6846\u67b6\u7b49\u590d\u6742\u7f51\u7edc\u670d\u52a1\u7684\u57fa\u7840\u3002\u57fa\u4e8e\u672c\u6587\u7684\u5185\u5bb9，\u8fd8\u53ef\u4ee5\u8fdb\u4e00\u6b65\u6269\u5c55\u7ebf\u7a0b\u6c60\u7248\u672c\u3001IO \u591a\u8def\u590d\u7528\u3001\u5e94\u7528\u5c42\u534f\u8bae\u5b9a\u5236\u3001\u7c98\u5305\u5904\u7406\u3001\u5fc3\u8df3\u68c0\u6d4b\u7b49\u8fdb\u9636\u529f\u80fd，\u9010\u6b65\u6784\u5efa\u5de5\u4e1a\u7ea7\u7684 TCP \u7f51\u7edc\u670d\u52a1\u3002<\/font><\/p>\n

                          \u2728\u628a\u8fd9\u4e9b\u5185\u5bb9\u5403\u900f\u8d85\u725b\u7684！\u653e\u677e\u4e0b\u5427\u2728 <\/font><\/p>\n

                          \u0295\u02d8\u1d25\u02d8\u0294 <\/font><\/p>\n

                          \u3065\u304d\u3089\u3069 <\/font><\/p>\n

                          \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n","protected":false},"excerpt":{"rendered":"

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