{"id":82196,"date":"2026-07-25T07:00:45","date_gmt":"2026-07-24T23:00:45","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/82196.html"},"modified":"2026-07-25T07:00:45","modified_gmt":"2026-07-24T23:00:45","slug":"linux-%e7%bd%91%e7%bb%9c%e5%a5%97%e6%8e%a5%e5%ad%97%e7%bc%96%e7%a8%8b%ef%bc%88%e4%ba%94%ef%bc%89tcp-%e5%9b%9e%e5%a3%b0%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%9a%84%e5%ae%9e%e7%8e%b0%ef%bc%88%e5%8d%95%e8%bf%9b","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/82196.html","title":{"rendered":"Linux \u7f51\u7edc\u5957\u63a5\u5b57\u7f16\u7a0b\uff08\u4e94\uff09TCP \u56de\u58f0\u670d\u52a1\u5668\u7684\u5b9e\u73b0\uff08\u5355\u8fdb\u7a0b(\u5355\u7ebf\u7a0b)\/\u591a\u8fdb\u7a0b\/\u591a\u7ebf\u7a0b\/\u7ebf\u7a0b\u6c60\u56db\u4e2a\u7248\u672c\uff09"},"content":{"rendered":"

\u76ee\u5f55<\/p>\n

\u4e00\u3001\u4ece UDP \u8fc7\u6e21\u5230 TCP \u534f\u8bae<\/p>\n

\u4e8c\u3001TCP \u7f16\u7801\u73af\u8282<\/p>\n

\u4e09\u3001\u9636\u6bb5\u4e00 : \u5355\u8fdb\u7a0b\/\u5355\u7ebf\u7a0b\u7248\u672c<\/p>\n

\u94fa\u57ab<\/p>\n

\u601d\u8def\u603b\u7ed3<\/p>\n

EchoTcpServer.hpp \u670d\u52a1\u7aef:<\/p>\n

\u6784\u9020\u51fd\u6570<\/p>\n

\u521d\u59cb\u5316\u51fd\u6570 InitServer()<\/p>\n

listen()<\/p>\n

\u542f\u52a8\u4e3b\u5faa\u73af Start() \u51fd\u6570<\/p>\n

accept()<\/p>\n

\u4e1a\u52a1\u5904\u7406\u51fd\u6570 serviceIO()<\/p>\n

EchoTcpServerMain.cc \u670d\u52a1\u7aef:<\/p>\n

EchoTcpClient.cc \u5ba2\u6237\u7aef:<\/p>\n

connect()<\/p>\n

\u8fd0\u884c\u7ed3\u679c:<\/p>\n

\u603b\u7ed3:<\/p>\n

\u56db\u3001\u9636\u6bb5\u4e8c\u00a0: \u591a\u8fdb\u7a0b\u7248\u672c<\/p>\n

\u903b\u8f91\u68b3\u7406:<\/p>\n

\u5f15\u53d1\u7684\u95ee\u9898:<\/p>\n

\u89e3\u51b3\u65b9\u6cd5:<\/p>\n

\u65b9\u6cd5\u4e00 : \u5f15\u5165\u5b59\u5b50\u8fdb\u7a0b<\/p>\n

\u65b9\u6cd5\u4e8c : \u5f15\u5165\u4fe1\u53f7<\/p>\n

\u8fd0\u884c\u7ed3\u679c:<\/p>\n

\u4ee3\u7801:<\/p>\n

telnet<\/p>\n

netstat -natp<\/p>\n

\u4e94\u3001\u9636\u6bb5\u4e09: \u591a\u7ebf\u7a0b\u7248\u672c<\/p>\n

\u903b\u8f91\u68b3\u7406:<\/p>\n

\u8fd0\u884c\u7ed3\u679c :<\/p>\n

\u4ee3\u7801:<\/p>\n

\u516d\u3001\u9636\u6bb5\u56db: \u7ebf\u7a0b\u6c60\u7248\u672c<\/p>\n

\u903b\u8f91\u68b3\u7406:<\/p>\n

\u6539\u52a8\u7684\u5730\u65b9:<\/p>\n

\u8fd0\u884c\u7ed3\u679c:<\/p>\n

\u957f\u8fde\u63a5\u548c\u77ed\u8fde\u63a5<\/p>\n

\u4ee3\u7801:<\/p>\n

\u4e03\u3001\u603b\u7ed3<\/p>\n

\n

\u4e00\u3001\u4ece UDP \u8fc7\u6e21\u5230 TCP \u534f\u8bae<\/h2>\n

\u5728\u524d\u9762\u7684\u51e0\u7bc7\u6587\u7ae0\u4e2d\u6211\u4eec\u5b8c\u6574\u7684\u624b\u5199\u3001\u8c03\u8bd5\u3001\u8fd0\u884c\u4e86\u4e00\u5957 UDP \u591a\u4eba\u5e7f\u64ad\u804a\u5929\u5ba4\u7684\u4ee3\u7801，\u4ece\u6a21\u5757\u5316\u5c01\u88c5\u3001\u56de\u8c03\u89e3\u8026\u3001\u7ebf\u7a0b\u6c60\u5f02\u6b65\u8c03\u5ea6，\u5230\u6700\u540e\u591a\u5ba2\u6237\u7aef\u540c\u65f6\u5728\u7ebf\u804a\u5929，\u6574\u5957\u7f51\u7edc\u901a\u4fe1\u6d41\u7a0b\u53ef\u4ee5\u51c6\u786e\u8dd1\u901a\u3002<\/p>\n

\u4e0b\u6765\u6211\u4eec\u5c31 TCP \u7ee7\u7eed\u5c55\u5f00\u5b66\u4e60，\u548c\u4e4b\u524d\u4e00\u6837，\u6211\u4eec\u5b66\u4e60 TCP \u7684\u65f6\u5019\u8fd8\u662f\u4ee5\u7f16\u7801\u4e3a\u4e3b，\u5728\u7f16\u7801\u7684\u540c\u65f6\u8bb2\u89e3\u5404\u4e2a TCP \u63a5\u53e3API\u7684\u542b\u4e49\u3002\u5728\u6b63\u5f0f\u5b66\u4e60\u00a0TCP \u4e4b\u524d，\u6211\u4eec\u5148\u7cfb\u7edf\u6027\u590d\u76d8 UDP \u7684\u6574\u4f53\u7279\u70b9，\u518d\u5e73\u6ed1\u8fc7\u6e21\u5230 TCP \u534f\u8bae，\u5bf9\u6bd4\u4e24\u79cd\u534f\u8bae\u7684\u5e95\u5c42\u5dee\u5f02\u548c\u4f7f\u7528\u533a\u522b，\u4e3a\u63a5\u4e0b\u6765\u00a0TCP \u7f16\u7801\u505a\u597d\u51c6\u5907\u3002<\/p>\n

1. \u5feb\u901f\u590d\u76d8：\u6211\u4eec\u521a\u521a\u5199\u5b8c\u7684 UDP \u6709\u4ec0\u4e48\u6838\u5fc3\u7279\u70b9 :<\/p>\n

\u7b2c\u4e00，UDP \u662f\u65e0\u8fde\u63a5\u534f\u8bae<\/span>\u3002\u901a\u4fe1\u53cc\u65b9\u4e0d\u9700\u8981\u63d0\u524d\u6253\u62db\u547c\u3001\u4e0d\u9700\u8981\u5efa\u7acb\u4e13\u5c5e\u901a\u8def，\u5ba2\u6237\u7aef\u76f4\u63a5\u6253\u5305\u6570\u636e\u5f80\u5916\u53d1\u5c31\u884c，\u670d\u52a1\u7aef\u88ab\u52a8\u63a5\u6536\u6570\u636e\u5373\u53ef，\u6574\u4e2a\u6d41\u7a0b\u8f7b\u91cf\u5316，\u6ca1\u6709\u591a\u4f59\u5f00\u9500\u3002<\/p>\n

\u7b2c\u4e8c，UDP \u901a\u4fe1\u4e0d\u4fdd\u8bc1\u53ef\u9760\u4f20\u8f93<\/span>\u3002\u534f\u8bae\u672c\u8eab\u4e0d\u4f1a\u7ed9\u6570\u636e\u505a\u786e\u8ba4\u5e94\u7b54\u3001\u4e0d\u4f1a\u81ea\u52a8\u91cd\u4f20\u4e22\u5931\u7684\u6570\u636e\u3002\u7f51\u7edc\u4fe1\u53f7\u6ce2\u52a8\u65f6，\u804a\u5929\u6d88\u606f\u6709\u53ef\u80fd\u76f4\u63a5\u4e22\u5305\u3001\u5bfc\u81f4\u5bf9\u65b9\u6536\u4e0d\u5230，\u7b80\u5355\u6765\u8bf4\u5c31\u662f \u201c\u53d1\u51fa\u53bb\u5c31\u4e0d\u7ba1\u4e86\u201d\u3002<\/p>\n

\u7b2c\u4e09，UDP \u7f16\u7a0b\u63a5\u53e3\u7b80\u5355\u7edf\u4e00\u3002<\/span>\u6211\u4eec\u5728\u7f16\u7801\u65f6\u53ea\u7528\u4e86 socket\u3001bind\u3001sendto\u3001recvfrom \u56db\u4e2a\u6838\u5fc3 API，\u5c31\u80fd\u5b9e\u73b0\u6536\u53d1\u6d88\u606f，\u6ca1\u6709\u6d89\u53ca\u5176\u4ed6\u7684\u63a5\u53e3API\u548c\u989d\u5916\u7684，\u67b6\u6784\u7b80\u5355，\u9002\u5408\u5165\u95e8\u7ec3\u624b\u3002<\/p>\n

\u7b2c\u56db，UDP \u662f\u9762\u5411\u6570\u636e\u62a5\u7684\u534f\u8bae<\/span>，UDP \u662f\u4ee5\u6570\u636e\u62a5\u4e3a\u5355\u4f4d\u6536\u53d1\u6570\u636e\u7684，\u53d1\u9001\u65b9\u8c03\u7528\u4e00\u6b21 sendto，\u5c31\u4f1a\u5f62\u6210\u4e00\u4e2a\u72ec\u7acb\u7684\u6570\u636e\u5305；\u63a5\u6536\u65b9\u8c03\u7528\u4e00\u6b21 recvfrom，\u4e5f\u53ea\u80fd\u5b8c\u6574\u63a5\u6536\u4e00\u4e2a\u6570\u636e\u5305\u3002\u6570\u636e\u6536\u53d1\u7684\u8fb9\u754c\u662f\u5929\u7136\u4fdd\u7559\u7684\u3002<\/p>\n

\u7b2c\u4e94，UDP \u7b80\u5355\u8f7b\u4fbf<\/span>，\u6b63\u662f\u56e0\u4e3a UDP \u7b80\u5355\u8f7b\u4fbf，\u6240\u4ee5\u6211\u4eec\u624d\u80fd\u8f7b\u677e\u642d\u914d\u56de\u8c03\u51fd\u6570\u3001\u7ebf\u7a0b\u6c60，\u628a\u5e7f\u64ad\u4efb\u52a1\u5f02\u6b65\u89e3\u8026\u3002<\/p>\n

2. \u8fc7\u6e21\u5230 TCP<\/p>\n

UDP \u7684\u4f18\u70b9\u662f\u7b80\u5355\u3001\u5feb\u901f\u3001\u5f00\u9500\u5c0f，\u4f46\u7f3a\u70b9\u4e5f\u975e\u5e38\u660e\u663e：\u4e0d\u53ef\u9760\u3001\u5bb9\u6613\u4e22\u6d88\u606f\u3001\u65e0\u6cd5\u611f\u77e5\u5ba2\u6237\u7aef\u4e0a\u4e0b\u7ebf\u3001\u4e0d\u9002\u5408\u6b63\u5f0f\u4e1a\u52a1\u573a\u666f\u3002<\/span><\/p>\n

\u56e0\u6b64\u5728\u771f\u6b63\u5de5\u4f5c\u4e2d，\u6bd4\u5982\u804a\u5929\u8f6f\u4ef6\u3001\u6d4f\u89c8\u5668\u8bbf\u95ee\u3001\u6587\u4ef6\u4f20\u8f93\u3001\u8fdc\u7a0b\u767b\u5f55，\u8fd9\u4e9b\u4e0d\u80fd\u4e22\u6570\u636e\u7684\u573a\u666f\u4e2d，\u6211\u4eec\u4f7f\u7528\u7684\u90fd\u662f\u00a0TCP \u534f\u8bae\u3002UDP \u53ea\u80fd\u7528\u5728\u76f4\u64ad\u3001\u8bed\u97f3\u901a\u8bdd\u3001\u6e38\u620f\u5b9e\u65f6\u5e27\u540c\u6b65\u8fd9\u7c7b\u53ef\u4ee5\u5bb9\u5fcd\u5c11\u91cf\u4e22\u5305\u3001\u4f18\u5148\u4fdd\u901f\u5ea6\u7684\u573a\u666f\u4e2d\u4f7f\u7528\u3002<\/p>\n

3. \u4e0b\u9762\u6211\u4eec\u4ecb\u7ecd\u4e00\u4e0b TCP \u534f\u8bae\u7684\u7279\u70b9 :<\/p>\n

\u7b2c\u4e00，TCP \u662f\u9762\u5411\u6709\u8fde\u63a5\u7684\u534f\u8bae<\/span>\u3002\u5c31\u50cf\u6253\u7535\u8bdd，\u5fc5\u987b\u5148\u62e8\u53f7\u63a5\u901a\u3001\u53cc\u65b9\u5efa\u7acb\u4e13\u5c5e\u901a\u9053，\u4e4b\u540e\u624d\u80fd\u8bf4\u8bdd\u901a\u4fe1\u3002\u5ba2\u6237\u7aef\u5fc5\u987b\u4e3b\u52a8\u8fde\u63a5\u670d\u52a1\u7aef，\u670d\u52a1\u7aef\u5fc5\u987b\u4e3b\u52a8\u63a5\u6536\u8fde\u63a5，\u94fe\u8def\u5efa\u597d\u4e4b\u540e，\u53cc\u65b9\u624d\u80fd\u6b63\u5e38\u6536\u53d1\u6570\u636e，\u4e0d\u662f\u60f3\u53d1\u5c31\u53d1\u3002<\/p>\n

\u7b2c\u4e8c，TCP \u4fdd\u8bc1\u53ef\u9760\u4f20\u8f93<\/span>\u3002\u534f\u8bae\u5e95\u5c42\u81ea\u5e26\u786e\u8ba4\u5e94\u7b54\u3001\u8d85\u65f6\u91cd\u4f20\u3001\u6570\u636e\u5305\u6392\u5e8f\u3001\u6d41\u91cf\u63a7\u5236\u3001\u62e5\u585e\u63a7\u5236\u5168\u5957\u673a\u5236\u3002\u53ea\u8981\u7f51\u7edc\u6ca1\u65ad，\u6570\u636e\u4e00\u5b9a\u80fd\u5b8c\u6574\u3001\u6709\u5e8f\u3001\u4e0d\u91cd\u590d\u3001\u4e0d\u4e22\u5931\u5730\u9001\u5230\u5bf9\u65b9\u624b\u91cc，\u975e\u5e38\u9002\u5408\u6b63\u5f0f\u4e1a\u52a1\u5f00\u53d1\u3002<\/p>\n

\u7b2c\u4e09，TCP \u662f\u5b57\u8282\u6d41\u4f20\u8f93<\/span>，\u6ca1\u6709\u6570\u636e\u5305\u8fb9\u754c\u3002\u6570\u636e\u50cf\u6d41\u6c34\u4e00\u6837\u6e90\u6e90\u4e0d\u65ad\u5f80\u5916\u6d41\u3002\u8fde\u7eed\u53d1\u4e24\u6761\u804a\u5929\u6d88\u606f，\u5bf9\u65b9\u53ef\u80fd\u4e00\u6b21\u6027\u6536\u4e24\u6761\u3001\u4e5f\u53ef\u80fd\u62c6\u5f00\u4e71\u6536，\u56e0\u6b64\u4f1a\u51fa\u73b0\u7c98\u5305\u3001\u62c6\u5305\u95ee\u9898，\u6240\u4ee5\u00a0TCP \u7f16\u7801\u65f6\u5fc5\u987b\u81ea\u5df1\u624b\u52a8\u8bbe\u8ba1\u6d88\u606f\u8fb9\u754c，\u8fd9\u4e5f\u662f TCP \u6700\u5927\u7684\u5f00\u53d1\u96be\u70b9\u3002<\/p>\n

\u7b2c\u56db，TCP \u53ef\u4ee5\u5b9e\u65f6\u611f\u77e5\u5ba2\u6237\u7aef\u5728\u7ebf\u3001\u79bb\u7ebf\u72b6\u6001<\/span>\u3002\u5ba2\u6237\u7aef\u6389\u7ebf\u65ad\u7f51\u9000\u51fa，\u670d\u52a1\u7aef\u5957\u63a5\u5b57\u4f1a\u76f4\u63a5\u611f\u77e5\u5230，\u80fd\u81ea\u52a8\u628a\u7528\u6237\u4ece\u5728\u7ebf\u5217\u8868\u5254\u9664\u3002<\/p>\n

4. UDP \u548c TCP \u6838\u5fc3 API \u5bf9\u6bd4<\/p>\n

UDP \u7528\u5230\u7684\u6838\u5fc3\u63a5\u53e3\u5982\u4e0b，\u6bd4\u8f83\u7b80\u5355:<\/p>\n

  • \u521b\u5efa\u5957\u63a5\u5b57：socket (AF_INET, SOCK_DGRAM<\/span>, 0)<\/li>\n
  • \u670d\u52a1\u7aef\u7ed1\u5b9a\u7aef\u53e3：bind()<\/li>\n
  • \u6536\u6240\u6709\u5ba2\u6237\u7aef\u6d88\u606f：recvfrom()<\/li>\n
  • \u7ed9\u6240\u6709\u5ba2\u6237\u7aef\u53d1\u6d88\u606f：sendto()<\/li>\n

    \u670d\u52a1\u7aef\u6574\u4e2a\u8fc7\u7a0b\u53ea\u9700\u8981\u4e00\u4e2a\u5957\u63a5\u5b57，\u5c31\u80fd\u7ba1\u7406\u5168\u90e8\u7684\u5ba2\u6237\u7aef\u3002<\/p>\n

    TCP \u8981\u7528\u5230\u7684\u63a5\u53e3\u5219\u4f1a\u591a\u4e00\u70b9，\u5e76\u4e14\u4f7f\u7528\u903b\u8f91\u548c UDP \u4e5f\u4e0d\u4e00\u6837:<\/p>\n

  • \u521b\u5efa\u76d1\u542c\u5957\u63a5\u5b57：socket (AF_INET, SOCK_STREAM<\/span>, 0)<\/li>\n
  • \u670d\u52a1\u7aef\u7ed1\u5b9a\u7aef\u53e3：bind()<\/li>\n
  • \u670d\u52a1\u7aef\u5f00\u542f\u76d1\u542c，\u7b49\u5f85\u5ba2\u6237\u7aef\u4e0a\u95e8：listen()<\/li>\n
  • \u670d\u52a1\u7aef\u63a5\u6536\u5ba2\u6237\u7aef\u8fde\u63a5，\u751f\u6210\u4e13\u5c5e\u901a\u4fe1\u5957\u63a5\u5b57：accept()<\/li>\n
  • \u670d\u52a1\u7aef\u548c\u5ba2\u6237\u7aef\u6536\u6570\u636e：read() \/ recv()<\/li>\n
  • \u670d\u52a1\u7aef\u548c\u5ba2\u6237\u7aef\u6536\u53d1\u6570\u636e：write() \/ send()<\/li>\n
  • \u6700\u540e\u5173\u95ed\u5957\u63a5\u5b57：close()<\/li>\n

    UDP \u9760 recvfrom \/ sendto \u5c31\u80fd\u76f4\u63a5\u901a\u4fe1；\u800c TCP \u9700\u8981\u5148\u76d1\u542c\u3001\u5148\u5efa\u7acb\u8fde\u63a5，\u751f\u6210\u4e00\u5bf9\u4e00\u7684\u4e13\u5c5e\u5957\u63a5\u5b57\u6536\u53d1\u6570\u636e，\u7ed3\u6784\u66f4\u4e25\u8c28，\u4e5f\u66f4\u590d\u6742\u3002<\/p>\n

    5. \u5b9e\u9645\u5f00\u53d1\u4f7f\u7528\u4e0a，\u4e8c\u8005\u6700\u76f4\u89c2\u7684\u533a\u522b:<\/p>\n

    UDP \u670d\u52a1\u7aef\u4f7f\u7528\u4e00\u4e2a\u5957\u63a5\u5b57 socket \u5c31\u80fd\u901a\u5403\u5168\u573a，\u4e0d\u7528\u7ba1\u8c01\u5728\u7ebf\u3001\u8c01\u79bb\u7ebf\u3002<\/p>\n

    TCP \u6bcf\u589e\u52a0\u4e00\u4e2a\u5ba2\u6237\u7aef\u5c31\u8981\u591a\u5f00\u4e00\u4e2a\u901a\u4fe1\u5957\u63a5\u5b57 socket，\u5fc5\u987b\u591a\u7ebf\u7a0b\u7ba1\u7406\u6bcf\u4e00\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5，\u67b6\u6784\u66f4\u8d34\u8fd1\u4f01\u4e1a\u771f\u5b9e\u540e\u7aef\u670d\u52a1\u3002<\/p>\n

    UDP \u4e0d\u7528\u5904\u7406\u7c98\u5305，TCP \u9700\u8981\u624b\u52a8\u89e3\u51b3\u7c98\u5305\u62c6\u5305\u95ee\u9898\u3002<\/p>\n

    UDP \u53ea\u7ba1\u6536\u53d1，\u4e0d\u7ba1\u53ef\u9760；TCP \u5168\u7a0b\u4fdd\u969c\u6d88\u606f\u7edd\u5bf9\u9001\u8fbe，\u9002\u5408\u6b63\u5f0f\u9879\u76ee\u3002<\/p>\n

    \u4e8c\u3001TCP \u7f16\u7801\u73af\u8282<\/h2>\n

    \u5728\u7cfb\u7edf\u5bf9\u6bd4\u4e86 UDP \u4e0e TCP \u7684\u6838\u5fc3\u5dee\u5f02\u540e，\u6211\u4eec\u6b63\u5f0f\u8fdb\u5165 TCP \u534f\u8bae\u7684\u7f16\u7801\u73af\u8282\u3002\u4e3a\u4e86\u5faa\u5e8f\u6e10\u8fdb\u5730\u7406\u89e3 TCP \u670d\u52a1\u7aef\u7684\u901a\u4fe1\u6a21\u578b\u4e0e\u5e76\u53d1\u901a\u4fe1，\u6211\u4eec\u5c06\u6309\u7167\u4ece\u7b80\u5355\u5230\u590d\u6742\u3001\u4ece\u57fa\u7840\u5230\u4f01\u4e1a\u7ea7\u7684\u601d\u8def，\u5206\u56db\u4e2a\u9636\u6bb5\u6765\u5b9e\u73b0\u6211\u4eec\u7684 TCP \u4ee3\u7801，\u548c\u4e4b\u524d\u7684 UDP \u6a21\u578b\u4e00\u6837，\u6211\u4eec\u4f9d\u7136\u4f7f\u7528\u670d\u52a1\u7aef\u548c\u5ba2\u6237\u7aef\u4e92\u76f8\u901a\u4fe1\u7684\u7ed3\u6784\u6a21\u578b：<\/p>\n

    1. \u9636\u6bb5\u4e00：\u5355\u8fdb\u7a0b\/\u5355\u7ebf\u7a0b\u7248\u672c<\/span>：\u6211\u4eec\u5148\u4e0d\u8ffd\u6c42\u5e76\u53d1，\u7528\u6700\u7b80\u5355\u7684\u4e32\u884c\u6a21\u578b，\u628a TCP \u901a\u4fe1\u7684\u6838\u5fc3\u63a5\u53e3\u3001\u8c03\u7528\u6d41\u7a0b\u548c\u6570\u636e\u6536\u53d1\u903b\u8f91\u68b3\u7406\u6e05\u695a\u3002\u4e3a\u540e\u7eed\u7684\u4f18\u5316\u6253\u57fa\u7840\u3002<\/p>\n

    2. \u9636\u6bb5\u4e8c：\u591a\u8fdb\u7a0b\u7248\u672c：<\/span>\u5728\u5355\u7ebf\u7a0b\u7684\u57fa\u7840\u4e0a，\u5f15\u5165 fork() \u7cfb\u7edf\u8c03\u7528，\u8ba9\u670d\u52a1\u7aef\u80fd\u591f\u540c\u65f6\u4e3a\u591a\u4e2a\u5ba2\u6237\u7aef\u670d\u52a1，\u4f53\u9a8c\u64cd\u4f5c\u7cfb\u7edf\u8fdb\u7a0b\u6a21\u578b\u5728\u5e76\u53d1\u4e2d\u7684\u5e94\u7528\u3002<\/p>\n

    3. \u9636\u6bb5\u4e09：\u591a\u7ebf\u7a0b\u7248\u672c<\/span>：\u57fa\u4e8e\u591a\u8fdb\u7a0b\u6a21\u578b\u8fdb\u884c\u4f18\u5316，\u670d\u52a1\u7aef\u6539\u7528\u7ebf\u7a0b\u5b9e\u73b0\u5e76\u53d1，\u611f\u53d7\u7ebf\u7a0b\u6bd4\u8fdb\u7a0b\u66f4\u8f7b\u91cf\u3001\u66f4\u9ad8\u6548\u7684\u4f18\u52bf\u3002<\/p>\n

    4. \u9636\u6bb5\u56db：\u7ebf\u7a0b\u6c60\u7248\u672c<\/span>：\u5f15\u5165\u7ebf\u7a0b\u6c60，\u89e3\u51b3\u591a\u7ebf\u7a0b\u9891\u7e41\u521b\u5efa\u9500\u6bc1\u7684\u5f00\u9500\u95ee\u9898，\u5b9e\u73b0\u4f01\u4e1a\u7ea7\u670d\u52a1\u7aef\u5e38\u7528\u7684\u9ad8\u6548\u3001\u53ef\u63a7\u7684\u5e76\u53d1\u6a21\u578b\u3002<\/p>\n

    \u63a5\u4e0b\u6765，\u6211\u4eec\u5c31\u4ece\u9636\u6bb5\u4e00：\u5355\u8fdb\u7a0b\/\u5355\u7ebf\u7a0b\u7248\u672c\u5f00\u59cb，\u4e00\u6b65\u6b65\u642d\u5efa\u6211\u4eec\u7684\u7b2c\u4e00\u4e2a TCP \u670d\u52a1\u7aef\u3002\u8fd9\u4e2a\u7248\u672c\u7684\u76ee\u6807\u4e0d\u662f\u9ad8\u5e76\u53d1，\u800c\u662f\u8ba9\u6211\u4eec\u771f\u6b63\u719f\u6089 TCP \u7684\u6bcf\u4e00\u4e2a\u63a5\u53e3\u548c\u6bcf\u4e00\u6b65\u6d41\u7a0b\u3002<\/p>\n

    \u4e09\u3001\u9636\u6bb5\u4e00 : \u5355\u8fdb\u7a0b\/\u5355\u7ebf\u7a0b\u7248\u672c<\/h2>\n

    \u63a5\u4e0b\u6765，\u6211\u4eec\u5c31\u5f00\u59cb\u7f16\u5199\u8fd9\u4e2a\u7248\u672c\u7684\u4ee3\u7801\u3002\u6211\u4eec\u8fb9\u5199\u4ee3\u7801\u8fb9\u8bb2\u89e3\u6bcf\u4e2a\u63a5\u53e3\u7684\u4f5c\u7528:<\/p>\n

    \u5728\u6b63\u5f0f\u7f16\u7801\u4e4b\u524d，\u6211\u4eec\u5fc5\u987b\u5148\u7406\u6e05 TCP \u5173\u952e\u7684\u63a5\u53e3\u4ee5\u53ca\u63a5\u53e3\u4e4b\u95f4\u7684\u8054\u7cfb\u3002\u56e0\u4e3a TCP \u662f\u9762\u5411\u8fde\u63a5\u7684\u534f\u8bae，\u670d\u52a1\u7aef\u4e0e\u5ba2\u6237\u7aef\u7684\u7cfb\u7edf\u8c03\u7528\u4e0d\u80fd\u968f\u610f\u8c03\u7528，\u5fc5\u987b\u9075\u5faa\u56fa\u5b9a\u7684\u65f6\u5e8f\u3001\u4e92\u76f8\u914d\u5408，\u624d\u80fd\u5b8c\u6210\u4e09\u6b21\u63e1\u624b\u4e0e\u6570\u636e\u4ea4\u4e92\u3002<\/p>\n

    \u94fa\u57ab<\/h3>\n

    1. \u4e24\u7aef\u90fd\u5fc5\u987b\u8c03\u7528\u7684\u516c\u5171\u57fa\u7840\u63a5\u53e3<\/p>\n

    socket() : \u65e0\u8bba\u670d\u52a1\u7aef\u8fd8\u662f\u5ba2\u6237\u7aef，\u901a\u4fe1\u7684\u7b2c\u4e00\u6b65\u90fd\u662f\u8c03\u7528 socket()\u3002\u4f5c\u7528：\u5728\u5185\u6838\u4e2d\u521b\u5efa\u5957\u63a5\u5b57\u6587\u4ef6，\u751f\u6210\u6587\u4ef6\u63cf\u8ff0\u7b26，\u4f5c\u4e3a\u7f51\u7edc\u901a\u4fe1\u7684\u57fa\u7840\u8f7d\u4f53\u3002\u6ca1\u6709 socket \u6587\u4ef6\u63cf\u8ff0\u7b26，\u540e\u7eed\u6240\u6709\u7f51\u7edc\u64cd\u4f5c\u90fd\u65e0\u6cd5\u8fdb\u884c\u3002<\/p>\n

    2. \u4ec5\u670d\u52a1\u7aef\u9700\u8981\u7684\u4e13\u5c5e\u63a5\u53e3<\/p>\n

    bind() : \u670d\u52a1\u7aef\u5fc5\u987b\u624b\u52a8 bind，\u7ed1\u5b9a\u56fa\u5b9a\u7684\u672c\u673a IP + \u56fa\u5b9a\u7aef\u53e3( INADDR_ANY )\u3002\u8ba9\u5ba2\u6237\u7aef\u53ef\u4ee5\u901a\u8fc7 IP + \u7aef\u53e3\u7cbe\u51c6\u627e\u5230\u670d\u52a1\u7aef\u8fdb\u7a0b\u3002<\/p>\n<\/p>\n

    listen() : \u5c06\u666e\u901a\u7ed1\u5b9a\u540e\u7684\u5957\u63a5\u5b57\u5f00\u542f\u7aef\u53e3\u76d1\u542c<\/span>，\u8ba9\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u81ea\u52a8\u7ef4\u62a4\u8fde\u63a5\u961f\u5217\u3001\u5904\u7406\u4e09\u6b21\u63e1\u624b\u3002<\/p>\n<\/p>\n

    accept() : \u963b\u585e\u7b49\u5f85\u5e76\u63a5\u53d7\u5ba2\u6237\u7aef\u8fde\u63a5<\/span>，\u4ece\u5185\u6838\u5b8c\u6210\u63e1\u624b\u7684\u961f\u5217\u4e2d\u53d6\u51fa\u8fde\u63a5，\u751f\u6210\u5168\u65b0\u7684\u901a\u4fe1\u5957\u63a5\u5b57，\u4e13\u95e8\u7528\u6765\u548c\u5355\u4e2a\u5ba2\u6237\u7aef\u505a\u6570\u636e\u4ea4\u4e92\u3002<\/p>\n

    3. \u4ec5\u5ba2\u6237\u7aef\u9700\u8981\u7684\u4e13\u5c5e\u63a5\u53e3<\/p>\n

    connect() : \u5ba2\u6237\u7aef\u4e0d\u9700\u8981\u624b\u52a8 bind，\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u81ea\u52a8\u5206\u914d\u968f\u673a\u672c\u5730\u7aef\u53e3\u4e0e\u4e34\u65f6 IP；\u5ba2\u6237\u7aef\u53ea\u9700\u901a\u8fc7 connect()，\u643a\u5e26\u670d\u52a1\u7aef IP + \u670d\u52a1\u7aef\u56fa\u5b9a\u7aef\u53e3<\/span>，\u4e3b\u52a8\u53d1\u8d77\u4e09\u6b21\u63e1\u624b\u8bf7\u6c42，\u548c\u670d\u52a1\u7aef\u5efa\u7acb\u4e13\u5c5e TCP \u8fde\u63a5\u901a\u9053\u3002<\/span><\/p>\n

    4. \u8fde\u63a5\u5efa\u7acb\u540e，\u4e24\u7aef\u5b8c\u5168\u5171\u7528\u7684\u6536\u53d1\u63a5\u53e3<\/p>\n

    TCP \u8fde\u63a5\u4e00\u65e6\u5efa\u7acb\u6210\u529f，\u670d\u52a1\u7aef accept \u8fd4\u56de\u7684\u901a\u4fe1\u6587\u4ef6\u00a0fd \u4e0e \u5ba2\u6237\u7aef socket \u7684\u6587\u4ef6 fd \u5f62\u6210\u53cc\u5411\u901a\u8def\u3002\u4e24\u7aef\u5730\u4f4d\u5bf9\u7b49，\u90fd\u53ef\u4ee5\u4f7f\u7528\u4e24\u5957\u5b8c\u5168\u7b49\u4ef7\u7684\u6536\u53d1\u51fd\u6570：<\/p>\n<\/p>\n

    \u901a\u7528\u6587\u4ef6 IO : read() \/ write()<\/p>\n<\/p>\n

    \u7f51\u7edc\u4e13\u7528 IO : recv() \/ send()<\/p>\n

    \u8865\u5145\u77e5\u8bc6\u70b9 :<\/p>\n

    \u5728TCP \u8fde\u63a5\u6210\u529f\u7684\u524d\u63d0\u4e0b：read == recv\u3001write == send，\u529f\u80fd\u672c\u8d28\u4e00\u81f4，\u5e95\u5c42\u90fd\u662f\u62f7\u8d1d\u6570\u636e\u5230\u5185\u6838\u7f13\u51b2\u533a；\u533a\u522b\u4ec5\u5728\u4e8e recv \/ send \u591a\u4e86\u7b2c\u56db\u4e2a\u6807\u5fd7\u4f4d\u53c2\u6570，\u53ef\u4ee5\u8bbe\u7f6e\u7279\u6b8a\u884c\u4e3a；\u65e5\u5e38\u666e\u901a TCP \u56de\u663e\u901a\u4fe1，\u76f4\u63a5\u4f7f\u7528 read \/ write \u5b8c\u5168\u591f\u7528，\u4ee3\u7801\u66f4\u7b80\u6d01\u901a\u7528\u3002<\/p>\n

    \u601d\u8def\u603b\u7ed3<\/h3>\n

    \u53cc\u65b9\u901a\u4fe1\u7684\u8d77\u59cb，\u670d\u52a1\u7aef\u4e0e\u5ba2\u6237\u7aef\u90fd\u9700\u8981\u5148\u901a\u8fc7 socket \u521b\u5efa\u5957\u63a5\u5b57\u3002\u670d\u52a1\u7aef\u521b\u5efa\u5957\u63a5\u5b57\u540e，\u9700\u8981\u4e3b\u52a8\u8c03\u7528 bind \u7ed1\u5b9a\u56fa\u5b9a IP \u4e0e\u7aef\u53e3，\u518d\u901a\u8fc7 listen \u5c06\u5957\u63a5\u5b57\u8bbe\u7f6e\u4e3a\u76d1\u542c\u72b6\u6001，\u6700\u540e\u4f9d\u9760 accept \u963b\u585e\u7b49\u5f85\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42\u3002\u5ba2\u6237\u7aef\u540c\u6837\u9700\u8981\u5148\u521b\u5efa\u5957\u63a5\u5b57，\u4f46\u65e0\u9700\u624b\u52a8\u7ed1\u5b9a\u672c\u5730\u5730\u5740\u4e0e\u7aef\u53e3，\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u81ea\u52a8\u5b8c\u6210\u5206\u914d，\u968f\u540e\u5ba2\u6237\u7aef\u76f4\u63a5\u8c03\u7528 connect，\u643a\u5e26\u670d\u52a1\u7aef\u7684 IP \u548c\u7aef\u53e3\u4e3b\u52a8\u53d1\u8d77\u8fde\u63a5\u3002\u5f53\u670d\u52a1\u7aef accept \u6355\u83b7\u5230\u8fde\u63a5\u8bf7\u6c42，\u53cc\u65b9\u5b8c\u6210\u4e09\u6b21\u63e1\u624b\u3001\u5efa\u7acb\u4e13\u5c5e TCP \u901a\u4fe1\u901a\u9053\u540e，\u670d\u52a1\u7aef\u4e0e\u5ba2\u6237\u7aef\u5c31\u53ef\u4ee5\u901a\u8fc7 read\/write \u6216 recv\/send \u63a5\u53e3，\u5b9e\u73b0\u53cc\u5411\u7684\u6570\u636e\u6536\u53d1\u4ea4\u4e92\u3002<\/p>\n

    \u4e0b\u6765\u6211\u4eec\u5148\u770b TCP \u670d\u52a1\u7aef\u5934\u6587\u4ef6\u7684\u4ee3\u7801:<\/p>\n

    EchoTcpServer.hpp \u670d\u52a1\u7aef:<\/h3>\n

    \u56e0\u4e3a\u6211\u4eec\u7b2c\u4e00\u4e2a\u9636\u6bb5\u662f\u5355\u8fdb\u7a0b \/ \u5355\u7ebf\u7a0b\u4e32\u884c\u6267\u884c\u7684，\u7ed3\u5408\u4e0a\u9762\u6211\u4eec\u68b3\u7406\u7684\u00a0TCP \u5404\u4e2a\u63a5\u53e3\u8c03\u7528\u7684\u987a\u5e8f，\u5b8c\u6574\u8fd8\u539f\u670d\u52a1\u7aef：socket -> bind -> listen -> accept -> \u6570\u636e\u6536\u53d1<\/span> \u7684\u5b8c\u6574\u6267\u884c\u6d41\u7a0b\u3002<\/p>\n

    \u670d\u52a1\u7aef\u6574\u4f53\u6267\u884c\u903b\u8f91\u9075\u5faa：\u5148\u521b\u5efa\u5957\u63a5\u5b57\u3001\u7ed1\u5b9a\u56fa\u5b9a\u7aef\u53e3\u3001\u5f00\u542f\u76d1\u542c，\u5faa\u73af\u963b\u585e\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5，\u83b7\u53d6\u901a\u4fe1\u5957\u63a5\u5b57\u540e，\u4e32\u884c\u5b8c\u6210\u5f53\u524d\u5ba2\u6237\u7aef\u7684\u8bfb\u5199\u4ea4\u4e92，\u76f4\u5230\u5ba2\u6237\u7aef\u65ad\u5f00，\u624d\u4f1a\u91cd\u65b0\u56de\u5230 accept \u63a5\u6536\u4e0b\u4e00\u4e2a\u5ba2\u6237\u7aef\u3002<\/span><\/p>\n

    \u4e0b\u9762\u76f4\u63a5\u653e\u51fa\u670d\u52a1\u7aef\u5b8c\u6574\u4ee3\u7801，\u6211\u4eec\u9010\u884c\u62c6\u89e3\u8bb2\u89e3：<\/p>\n

    \"\"<\/p>\n

    \u9996\u5148\u662f\u5934\u6587\u4ef6\u90e8\u5206，\u6211\u4eec\u5f15\u5165\u4e86\u6807\u51c6\u5e93\u3001\u7cfb\u7edf\u5957\u63a5\u5b57\u76f8\u5173\u5934\u6587\u4ef6，\u540c\u65f6\u5305\u542b\u4e86\u4e4b\u524d\u5c01\u88c5\u597d\u7684 Logger.hpp（\u65e5\u5fd7\u5de5\u5177）\u548c InetAddr.hpp（IP\u5730\u5740\u5de5\u5177\u7c7b），\u65b9\u4fbf\u540e\u7eed\u65e5\u5fd7\u6253\u5370\u548c\u5ba2\u6237\u7aef\u5730\u5740\u89e3\u6790\u3002\u5168\u5c40\u90e8\u5206\u8fd8\u5b9a\u4e49\u4e86\u9519\u8bef\u7801\u679a\u4e3e\u3001\u76d1\u542c\u961f\u5217\u957f\u5ea6 gbacklog\u00a0\u548c\u9ed8\u8ba4\u7aef\u53e3 gport，\u662f\u670d\u52a1\u7aef\u7684\u57fa\u7840\u914d\u7f6e\u3002<\/p>\n

    \u6574\u4e2a\u670d\u52a1\u7aef\u88ab\u5c01\u88c5\u6210\u4e86 TcpServer\u00a0\u7c7b，\u6838\u5fc3\u7ed3\u6784\u53ef\u4ee5\u5206\u4e3a\u4e09\u7c7b：\u6784\u9020\u51fd\u6570\u3001\u521d\u59cb\u5316\u51fd\u6570 InitServer()\u3001\u542f\u52a8\u4e3b\u5faa\u73af Start()\u3001\u4e1a\u52a1\u5904\u7406\u51fd\u6570 serviceIO()，\u4ee5\u53ca\u79c1\u6709\u6210\u5458\u53d8\u91cf<\/span>\u3002<\/p>\n

    \u5728\u8fdb\u5165\u51fd\u6570\u7ec6\u8282\u4e4b\u524d，\u6211\u4eec\u9700\u8981\u660e\u786e TCP \u670d\u52a1\u7aef\u4e24\u4e2a\u5173\u952e\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26，\u8fd9\u662f\u548c UDP \u6700\u5927\u7684\u533a\u522b：<\/p>\n

    \u00a0 \u00a0 \u00a0 \u00a0 1. \u76d1\u542c\u5957\u63a5\u5b57 _listensockfd：\u5b83\u662f\u670d\u52a1\u7aef\u7684\u5168\u5c40\u552f\u4e00\u8d44\u6e90，\u4ece InitServer() \u521b\u5efa\u51fa\u6765，\u5c31\u4e00\u76f4\u56fa\u5b9a\u4e0d\u53d8，\u6574\u4e2a\u8fdb\u7a0b\u91cc\u53ea\u6709\u8fd9\u4e00\u4e2a，\u6240\u4ee5\u6211\u4eec\u76f4\u63a5\u628a\u5b83\u5b58\u4e3a\u7c7b\u7684\u6210\u5458\u53d8\u91cf，\u4ece\u5934\u5230\u5c3e\u590d\u7528\u3002<\/p>\n

    \u00a0 \u00a0 \u00a0 \u00a0 2. \u901a\u4fe1\u5957\u63a5\u5b57 sockfd：\u5b83\u662f\u670d\u52a1\u7aef\u5185\u6838\u52a8\u6001\u521b\u5efa\u7684\u3002\u6bcf\u6b21\u8c03\u7528 accept() \u6210\u529f\u65f6，\u5185\u6838\u4f1a\u7ed9\u670d\u52a1\u7aef\u5206\u914d\u4e00\u4e2a\u5168\u65b0\u7684\u3001\u72ec\u7acb\u7684 sockfd，\u4e13\u4f9b\u670d\u52a1\u7aef\u4e0e\u5f53\u524d\u5ba2\u6237\u7aef\u4e00\u5bf9\u4e00\u6536\u53d1\u6570\u636e\u4f7f\u7528\u3002\u8fd9\u4e2a sockfd \u5f52\u670d\u52a1\u7aef\u6240\u6709，\u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5\u540e，\u8be5 sockfd \u5c31\u4f1a\u88ab\u5173\u95ed\u91ca\u653e\u3002\u56e0\u6b64\u6211\u4eec\u4e0d\u628a\u8fd9\u4e2a\u901a\u4fe1\u5957\u63a5\u5b57\u4f5c\u4e3a\u6210\u5458\u53d8\u91cf\u50a8\u5b58\u3002<\/p>\n

    \u6784\u9020\u51fd\u6570<\/span><\/h4>\n

    \"\"1. \u6211\u4eec\u5148\u4ece TcpServer \u7c7b\u7684\u6784\u9020\u51fd\u6570\u8bb2\u8d77，\u5b83\u662f\u6574\u4e2a\u670d\u52a1\u7aef\u7684\u8d77\u70b9，\u6838\u5fc3\u4f5c\u7528\u5c31\u662f\u521d\u59cb\u5316\u670d\u52a1\u7aef\u7684\u57fa\u7840\u914d\u7f6e，\u6700\u5173\u952e\u7684\u5c31\u662f\u7ed1\u5b9a\u7aef\u53e3\u53f7\u3002\u5f53\u6211\u4eec\u542f\u52a8\u670d\u52a1\u7aef\u7a0b\u5e8f\u65f6，\u4f1a\u7ed9\u670d\u52a1\u7aef\u4f20\u5165\u4e00\u4e2a\u7aef\u53e3\u53f7，\u8fd9\u4e2a\u7aef\u53e3\u53f7\u5c31\u662f\u7528\u6765\u552f\u4e00\u6807\u8bc6\u8fd9\u53f0\u670d\u52a1\u5668\u4e0a\u7684 TCP \u670d\u52a1\u7684\u3002<\/p>\n<\/p>\n

    2. \u5ba2\u6237\u7aef\u8981\u8fde\u63a5\u670d\u52a1\u7aef，\u5fc5\u987b\u6307\u5b9a \u670d\u52a1\u7aef IP + \u8fd9\u4e2a\u7aef\u53e3\u53f7 ，\u624d\u80fd\u7cbe\u51c6\u627e\u5230\u5bf9\u5e94\u7684\u670d\u52a1；<\/p>\n<\/p>\n

    3. \u670d\u52a1\u7aef\u62ff\u5230\u8fd9\u4e2a\u7aef\u53e3\u53f7\u540e，\u4f1a\u5728\u540e\u7eed\u7684 InitServer() \u4e2d，\u901a\u8fc7 bind() \u7cfb\u7edf\u8c03\u7528，\u628a\u76d1\u542c\u5957\u63a5\u5b57 _listensockfd \u548c\u8fd9\u4e2a\u7aef\u53e3\u53f7\u7ed1\u5b9a\u5728\u4e00\u8d77，\u8ba9\u5185\u6838\u77e5\u9053：\u6240\u6709\u53d1\u5f80\u8fd9\u4e2a\u7aef\u53e3\u7684 TCP \u8fde\u63a5\u8bf7\u6c42，\u90fd\u8981\u4ea4\u7ed9\u8fd9\u4e2a\u76d1\u542c\u5957\u63a5\u5b57\u6765\u5904\u7406\u3002<\/p>\n

    \u521d\u59cb\u5316\u51fd\u6570 InitServer()<\/span><\/h4>\n

    \"\"1. \u7b2c\u4e00\u6b65 socket() \u521b\u5efa\u76d1\u542c\u5957\u63a5\u5b57<\/span>，\u7b2c\u4e00\u4e2a\u53c2\u6570 AF_INET \u4ee3\u8868\u4f7f\u7528 IPv4 \u7f51\u7edc\u534f\u8bae；\u7b2c\u4e8c\u4e2a\u53c2\u6570 SOCK_STREAM \u4ee3\u8868\u9762\u5411\u8fde\u63a5\u3001\u6d41\u5f0f\u4f20\u8f93，\u8fd9\u662f TCP \u7684\u4e13\u5c5e\u7279\u5f81；\u7b2c\u4e09\u4e2a\u53c2\u6570 0 \u8868\u793a\u9ed8\u8ba4\u534f\u8bae，\u5185\u6838\u4f1a\u81ea\u52a8\u9002\u914d TCP\u3002\u8fd9\u4e24\u4e2a\u6838\u5fc3\u53c2\u6570\u7ec4\u5408，\u660e\u786e\u544a\u8bc9\u5185\u6838：\u5f53\u524d\u8981\u521b\u5efa\u7684\u5957\u63a5\u5b57，\u662f\u4e13\u95e8\u7528\u4e8e TCP \u901a\u4fe1\u7684\u5957\u63a5\u5b57\u3002\u5957\u63a5\u5b57\u521b\u5efa\u6210\u529f\u540e，\u8fd4\u56de\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26，\u4e5f\u5c31\u662f\u6211\u4eec\u7684 _listensockfd\u3002\u4ece\u5185\u6838\u5c42\u9762\u770b，Socket \u662f\u4e00\u4e2a\u7279\u6b8a\u7684\u7f51\u7edc\u6587\u4ef6\u5bf9\u8c61\u3002\u8fdb\u7a0b\u8c03\u7528 socket() \u7cfb\u7edf\u8c03\u7528\u65f6，\u5185\u6838\u4f1a\u5728\u5185\u5b58\u4e2d\u521b\u5efa\u4e00\u4e2a\u4e13\u95e8\u7528\u4e8e\u7f51\u7edc\u901a\u4fe1\u7684\u6587\u4ef6\u5bf9\u8c61，\u5e76\u5206\u914d\u552f\u4e00\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26 fd\u3002\u8fd9\u4e2a\u6587\u4ef6\u5bf9\u8c61\u5185\u90e8\u7ef4\u62a4\u7740\u7f51\u7edc\u72b6\u6001\u3001\u534f\u8bae\u4fe1\u606f，\u4ee5\u53ca\u7528\u4e8e\u6536\u53d1\u6570\u636e\u7684\u5185\u6838\u7f13\u51b2\u533a\u3002\u540e\u7eed\u6240\u6709\u7f51\u7edc\u64cd\u4f5c，\u672c\u8d28\u4e0a\u90fd\u662f\u901a\u8fc7\u6587\u4ef6\u63cf\u8ff0\u7b26 fd，\u6765\u64cd\u4f5c\u8fd9\u4e2a\u5185\u6838\u5bf9\u8c61\u3002<\/p>\n

    2.\u00a0\u7b2c\u4e8c\u6b65\u586b\u5145\u672c\u5730 sockaddr_in \u7ed3\u6784\u4f53<\/span>，\u6211\u4eec\u624b\u52a8\u5b9a\u4e49\u5e76\u586b\u5145\u672c\u673a\u5730\u5740\u4fe1\u606f，\u5730\u5740\u534f\u8bae\u5bb6\u65cf\u540c\u6837\u8bbe\u4e3a AF_INET，\u548c socket() \u521b\u5efa\u65f6\u4fdd\u6301\u4e00\u81f4；\u586b\u5165\u670d\u52a1\u7aef\u56fa\u5b9a\u7aef\u53e3，\u5e76\u901a\u8fc7 htons() \u8f6c\u6362\u4e3a\u7f51\u7edc\u5927\u7aef\u5b57\u8282\u5e8f；IP \u5730\u5740\u586b\u5199 INADDR_ANY，\u542b\u4e49\u662f\u7ed1\u5b9a\u672c\u673a\u6240\u6709\u7f51\u5361\u3001\u6240\u6709\u53ef\u7528 IP，\u5916\u6765\u8fde\u63a5\u53ea\u8981\u8bbf\u95ee\u5f53\u524d\u7aef\u53e3，\u90fd\u4f1a\u88ab\u63a5\u6536\u3002\u8fd9\u4e00\u6b65\u53ea\u662f\u5728\u7528\u6237\u6001\u4ee3\u7801\u4e2d，\u5199\u597d\u4e00\u4efd \u201c\u672c\u673a\u5730\u5740\u914d\u7f6e\u4fe1\u606f\u201d，\u5b83\u53ea\u662f\u4e00\u4e2a\u666e\u901a\u7ed3\u6784\u4f53\u53d8\u91cf，\u5c1a\u672a\u548c\u4efb\u4f55\u6587\u4ef6\u63cf\u8ff0\u7b26\u3001\u5185\u6838\u5bf9\u8c61\u4ea7\u751f\u5173\u8054\u3002<\/p>\n

    3.\u00a0\u7b2c\u4e09\u6b65 bind() \u7ed1\u5b9a，<\/span>\u5c06\u7b2c\u4e8c\u6b65\u586b\u5145\u597d\u7684\u5730\u5740\u7ed3\u6784\u4f53，\u5199\u5165\u5230 _listensockfd \u7d22\u5f15\u5bf9\u5e94\u7684\u5185\u6838 Socket \u6587\u4ef6\u5bf9\u8c61\u4e2d，\u628a\u672c\u673a IP\u3001\u7aef\u53e3\u4fe1\u606f\u8bb0\u5f55\u8fdb\u53bb\u3002\u7ed1\u5b9a\u5b8c\u6210\u540e，\u5185\u6838\u5c31\u660e\u786e\u4e86：\u8fd9\u4e2a _listensockfd \u5bf9\u5e94\u7684\u5957\u63a5\u5b57，\u4e13\u95e8\u8d1f\u8d23\u76d1\u542c\u7ed3\u6784\u4f53 local \u4e2d\u6307\u5b9a\u7684\u300c\u672c\u673a IP + \u7aef\u53e3\u300d\u7684 TCP \u8fde\u63a5\u8bf7\u6c42\u3002\u540e\u7eed\u53ea\u8981\u6709\u5ba2\u6237\u7aef\u8bbf\u95ee\u8be5\u670d\u52a1\u5668\u7684\u7aef\u53e3，\u5185\u6838\u5c31\u4f1a\u628a\u8fde\u63a5\u8bf7\u6c42\u4ea4\u7ed9\u8fd9\u4e2a\u76d1\u542c\u5957\u63a5\u5b57\u5904\u7406\u3002<\/p>\n

    listen()<\/h5>\n

    \"\"<\/p>\n

    4.\u00a0\u7b2c\u56db\u6b65 listen() \u5f00\u542f\u76d1\u542c<\/span>：\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u8981\u5f00\u542f\u76d1\u542c\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26，\u5fc5\u987b\u662f\u5df2\u7ecf bind() \u7ed1\u5b9a\u597d\u7684\u76d1\u542c\u5957\u63a5\u5b57\u3002\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u7b49\u5f85\u961f\u5217\u957f\u5ea6：\u5185\u6838\u4f1a\u4e3a\u5f53\u524d\u76d1\u542c\u7aef\u53e3\u7ef4\u62a4\u4e00\u6761\u961f\u5217，\u7528\u4e8e\u5b58\u653e\u672a\u5b8c\u6210\u4e09\u6b21\u63e1\u624b\u3001\u6216\u5df2\u5b8c\u6210\u63e1\u624b\u4f46\u5c1a\u672a\u88ab accept() \u53d6\u8d70\u7684\u5ba2\u6237\u7aef\u8fde\u63a5\u8bf7\u6c42，\u7b2c\u4e8c\u4e2a\u53c2\u6570\u5c31\u662f\u8fd9\u6761\u961f\u5217\u7684\u6700\u5927\u5bb9\u91cf\u3002listen() \u7684\u4f5c\u7528，\u662f\u628a\u539f\u672c\u666e\u901a\u7684 TCP \u5957\u63a5\u5b57，\u5347\u7ea7\u4e3a\u76d1\u542c\u72b6\u6001：\u544a\u8bc9\u5185\u6838\u5f53\u524d _listensockfd \u4e0d\u518d\u7528\u4e8e\u666e\u901a\u901a\u4fe1，\u4e13\u95e8\u7528\u6765\u88ab\u52a8\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5；\u5185\u6838\u4f1a\u5f00\u59cb\u5728\u5e95\u5c42\u7f51\u5361\u5c42\u9762，\u76d1\u542c\u5bf9\u5e94\u7aef\u53e3\u7684 TCP \u8fde\u63a5\u8bf7\u6c42，\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u4e09\u6b21\u63e1\u624b\u8bf7\u6c42\u4f1a\u88ab\u5185\u6838\u81ea\u52a8\u5904\u7406，\u653e\u5165\u7b49\u5f85\u961f\u5217，\u6392\u961f\u7b49\u5f85\u670d\u52a1\u7aef accept() \u53d6\u7528\u3002<\/p>\n

    \u542f\u52a8\u4e3b\u5faa\u73af Start() \u51fd\u6570<\/span><\/h4>\n

    \"\"1. \u9996\u5148\u5b9a\u4e49\u51fa\u6765\u7684 client_addr \u662f\u4e00\u4e2a\u7528\u6237\u6001\u7684 sockaddr_in \u7ed3\u6784\u4f53，\u5b83\u7684\u4f5c\u7528\u5c31\u662f\u7528\u6765\u5b58\u653e\u8fde\u63a5\u8fdb\u6765\u7684\u5ba2\u6237\u7aef\u7684 IP \u5730\u5740\u548c\u7aef\u53e3\u53f7\u3002\u65b9\u4fbf\u6211\u4eec\u5728\u65e5\u5fd7\u91cc\u6253\u5370\u5ba2\u6237\u7aef\u4fe1\u606f\u3002<\/p>\n

    accept()<\/h5>\n

    \"\"<\/p>\n

    accept \u7684\u540e\u4e24\u4e2a\u53c2\u6570\u662f\u8f93\u51fa\u578b\u53c2\u6570\u3002\u6211\u4eec\u5df2\u7ecf\u63d0\u524d\u5b9a\u4e49\u4e86\u4e00\u5757\u7a7a\u7684\u5730\u5740\u7ed3\u6784\u4f53\u5185\u5b58，\u65e0\u9700\u624b\u52a8\u586b\u5199\u5ba2\u6237\u7aef\u4fe1\u606f\u3002\u5f53\u5ba2\u6237\u7aef\u5b8c\u6210\u4e09\u6b21\u63e1\u624b\u8fde\u63a5\u670d\u52a1\u7aef\u65f6，\u5185\u6838\u4f1a\u81ea\u52a8\u83b7\u53d6\u5ba2\u6237\u7aef\u7684 IP \u4e0e\u7aef\u53e3，\u5e76\u4e3b\u52a8\u5c06\u8fd9\u4e9b\u4fe1\u606f\u5199\u5165\u6211\u4eec\u4f20\u5165\u7684\u7ed3\u6784\u4f53\u4e2d\u3002\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u670d\u52a1\u7aef\u81ea\u8eab\u7684\u76d1\u542c\u6587\u4ef6\u63cf\u8ff0\u7b26，\u7528\u4e8e\u7b49\u5f85\u65b0\u8fde\u63a5；\u540e\u4e24\u4e2a\u53c2\u6570\u7528\u4e8e\u5e26\u51fa\u5bf9\u7aef\u5ba2\u6237\u7aef\u5730\u5740，\u4e24\u8005\u4f5c\u7528\u72ec\u7acb，\u4e92\u4e0d\u51b2\u7a81\u3002accept \u7684\u672c\u8d28\u662f\u4ece\u5185\u6838\u7684\u8fde\u63a5\u7b49\u5f85\u961f\u5217\u91cc，\u53d6\u51fa\u4e00\u6761\u5df2\u5b8c\u6210\u4e09\u6b21\u63e1\u624b\u7684\u5ba2\u6237\u7aef\u8fde\u63a5，\u4e3a\u5176\u521b\u5efa\u4e13\u5c5e\u7684\u901a\u4fe1\u5957\u63a5\u5b57，\u5e76\u8fd4\u56de\u7ed9\u7528\u6237\u6001\u4f7f\u7528\u3002<\/p>\n<\/p>\n

    accept() \u6210\u529f\u540e\u4f1a\u8fd4\u56de\u4e00\u4e2a\u5168\u65b0\u7684\u3001\u5ba2\u6237\u7aef\u4e13\u5c5e\u7684\u901a\u4fe1\u5957\u63a5\u5b57 fd；\u56e0\u4e3a TCP \u662f\u9762\u5411\u8fde\u63a5\u7684\u534f\u8bae，\u6bcf\u4e2a\u5ba2\u6237\u7aef\u90fd\u9700\u8981\u72ec\u7acb\u7684\u901a\u4fe1\u4e0a\u4e0b\u6587（\u6536\u53d1\u7f13\u51b2\u533a\u3001\u8fde\u63a5\u72b6\u6001\u3001\u5730\u5740\u4fe1\u606f）\u3002\u5185\u6838\u4e3a\u6bcf\u4e2a\u5ba2\u6237\u7aef\u5355\u72ec\u521b\u5efa socket \u7ed3\u6784\u4f53\u548c fd，\u80fd\u4fdd\u8bc1\u4e0d\u540c\u5ba2\u6237\u7aef\u4e4b\u95f4\u7684\u6570\u636e\u5b8c\u5168\u9694\u79bb，\u4e0d\u4f1a\u4e92\u76f8\u5e72\u6270\u3002<\/p>\n

    2. accept() \u540e\u9762\u7684\u4ee3\u7801 InetAddr clientaddr(client_addr) \u5c31\u662f\u628a accept() \u586b\u597d\u7684 struct sockaddr_in client_addr，\u5305\u88c5\u6210\u6211\u4eec\u81ea\u5df1\u7684 InetAddr \u5bf9\u8c61；\u65b9\u4fbf\u540e\u7eed\u8c03\u7528 ToString() \u65b9\u6cd5，\u6253\u5370\u51fa [IP:\u7aef\u53e3] \u683c\u5f0f\u7684\u65e5\u5fd7\u3002<\/p>\n

    3. \u4e0b\u4e00\u884c\u7684 serviceIO(sockfd, clientaddr) \u5c31\u662f\u628a accept() \u8fd4\u56de\u7684\u901a\u4fe1\u5957\u63a5\u5b57 sockfd，\u548c\u5305\u88c5\u597d\u7684\u5ba2\u6237\u7aef\u5730\u5740\u5bf9\u8c61，\u4e00\u8d77\u4f20\u7ed9 serviceIO \u51fd\u6570；\u8ba9 serviceIO \u77e5\u9053：\u8fd9\u6b21\u8981\u548c\u54ea\u4e2a\u5ba2\u6237\u7aef(clientaddr) ，\u7528\u54ea\u4e2a fd（sockfd）\u6765\u6536\u53d1\u6570\u636e\u3002<\/p>\n

    \u4e1a\u52a1\u5904\u7406\u51fd\u6570 serviceIO()<\/span><\/h4>\n

    \"\"<\/p>\n

    1. serviceIO() \u51fd\u6570\u662f\u670d\u52a1\u7aef\u4e0e\u5355\u4e2a\u5ba2\u6237\u7aef\u901a\u4fe1\u7684\u6838\u5fc3\u903b\u8f91，\u5b83\u63a5\u6536 accept() \u8fd4\u56de\u7684\u5ba2\u6237\u7aef\u901a\u4fe1\u5957\u63a5\u5b57 sockfd \u548c\u5730\u5740\u4fe1\u606f，\u9996\u5148\u6253\u5370\u5ba2\u6237\u7aef\u5730\u5740\u65e5\u5fd7；<\/p>\n

    2.\u00a0\u5148\u901a\u8fc7 address.ToString() \u548c\u65e5\u5fd7\u6253\u5370\u51fa\u5ba2\u6237\u7aef\u7684 IP \u548c\u7aef\u53e3，\u65b9\u4fbf\u6211\u4eec\u5728\u65e5\u5fd7\u91cc\u533a\u5206\u4e0d\u540c\u7684\u5ba2\u6237\u7aef\u8fde\u63a5\u3002<\/p>\n

    3. \u4e0b\u9762\u5c31\u8fdb\u5165\u8fd9\u4e2a while(true) \u5faa\u73af，\u8fd9\u662f\u00a0\u201c\u957f\u8fde\u63a5\u201d \u7684\u4f53\u73b0：\u53ea\u8981\u5ba2\u6237\u7aef\u4e0d\u65ad\u5f00，\u670d\u52a1\u7aef\u5c31\u4f1a\u4e00\u76f4\u5faa\u73af，\u7b49\u5f85\u5ba2\u6237\u7aef\u53d1\u9001\u65b0\u6570\u636e，\u4e0d\u4f1a\u4e00\u6b21\u8bfb\u5199\u5c31\u9000\u51fa\u3002<\/p>\n

    4. \u518d\u4e0b\u6765\u5c31\u662f\u5ba2\u6237\u7aef\u901a\u8fc7 read() \u7cfb\u7edf\u8c03\u7528\u6765\u8bfb\u53d6\u6570\u636e\u4e86，read() \u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u00a0sockfd \u5c31\u662f accept() \u8fd4\u56de\u7684\u3001\u5ba2\u6237\u7aef\u4e13\u5c5e\u7684\u901a\u4fe1\u5957\u63a5\u5b57 fd\u3002\u7b2c\u4e8c\u4e2a\u53c2\u6570 inbuffer \u662f\u7528\u6237\u6001\u7684\u7f13\u51b2\u533a，\u7528\u6765\u5b58\u653e\u4ece\u5185\u6838\u7f13\u51b2\u533a\u8bfb\u51fa\u6765\u7684\u6570\u636e\u3002\u7b2c\u4e09\u4e2a\u53c2\u6570 sizeof(inbuffer) – 1 \u662f\u6700\u591a\u8bfb\u53d6\u7684\u5b57\u8282\u6570\u3002<\/p>\n

    5. \u5185\u6838\u5728\u5e95\u5c42\u4f1a\u68c0\u67e5 sockfd \u5bf9\u5e94\u7684 socket \u7f51\u7edc\u6587\u4ef6\u7684\u63a5\u6536\u7f13\u51b2\u533a；\u5982\u679c\u7f13\u51b2\u533a\u91cc\u6709\u6570\u636e，\u5c31\u628a\u6570\u636e\u62f7\u8d1d\u5230\u7528\u6237\u6001\u7684 inbuffer \u91cc，\u5e76\u8fd4\u56de\u5b9e\u9645\u8bfb\u53d6\u7684\u5b57\u8282\u6570 n；\u5982\u679c\u7f13\u51b2\u533a\u4e3a\u7a7a，read() \u4f1a\u963b\u585e\u7b49\u5f85，\u76f4\u5230\u5ba2\u6237\u7aef\u53d1\u9001\u6570\u636e\u8fc7\u6765；\u5982\u679c\u5ba2\u6237\u7aef\u5df2\u7ecf\u6b63\u5e38\u65ad\u5f00\u8fde\u63a5，read() \u4f1a\u76f4\u63a5\u8fd4\u56de 0；\u5982\u679c\u53d1\u751f\u9519\u8bef（\u6bd4\u5982\u5ba2\u6237\u7aef\u5f02\u5e38\u65ad\u5f00\u3001\u7f51\u7edc\u9519\u8bef），read() \u4f1a\u8fd4\u56de -1，\u5e76\u8bbe\u7f6e errno\u3002<\/p>\n

    6.\u00a0\u8bfb\u6210\u529f\u540e\u7684\u5904\u7406( n>0)，\u628a\u5ba2\u6237\u7aef\u5730\u5740\u548c\u6536\u5230\u7684\u6d88\u606f\u4e00\u8d77\u6253\u5370，\u65b9\u4fbf\u6211\u4eec\u5728\u65e5\u5fd7\u91cc\u770b\u5230 \u201c\u54ea\u4e2a\u5ba2\u6237\u7aef\u8bf4\u4e86\u4ec0\u4e48\u201d\u3002\u518d\u628a\u6536\u5230\u7684\u6d88\u606f\u524d\u9762\u52a0\u4e0a server echo# \u524d\u7f00，\u6784\u9020\u4e00\u4e2a\u56de\u663e\u5b57\u7b26\u4e32，\u51c6\u5907\u56de\u53d1\u7ed9\u5ba2\u6237\u7aef\u3002<\/p>\n

    7. \u8bfb\u5b8c\u4e4b\u540e\u670d\u52a1\u7aef\u5c31\u53ef\u4ee5\u5411\u5ba2\u6237\u7aef\u901a\u8fc7 write() \u7cfb\u7edf\u8c03\u7528\u5199\u4e86，write() \u7684\u7b2c\u4e00\u4e2a\u53c2\u6570 sockfd \u540c\u6837\u662f\u5ba2\u6237\u7aef\u4e13\u5c5e\u7684\u901a\u4fe1\u5957\u63a5\u5b57 fd；\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u5199\u7684\u5185\u5bb9，\u6211\u4eec\u5c06\u5b83\u8f6c\u6362\u4e3a C \u98ce\u683c\u7684\u5b57\u7b26\u5f62\u5f0f； \u7b2c\u4e09\u4e2a\u53c2\u6570\u662f\u8981\u53d1\u9001\u7684\u5b57\u8282\u6570\u3002<\/p>\n

    8. write() \u65f6\u5e95\u5c42\u4f1a\u628a\u7528\u6237\u6001\u7684\u5b57\u7b26\u4e32\u6570\u636e，\u62f7\u8d1d\u5230 sockfd \u5bf9\u5e94\u7684\u5185\u6838 socket \u7f51\u7edc\u6587\u4ef6\u7684\u53d1\u9001\u7f13\u51b2\u533a\u91cc；\u5185\u6838\u7684 TCP \u534f\u8bae\u6808\u4f1a\u81ea\u52a8\u628a\u53d1\u9001\u7f13\u51b2\u533a\u7684\u6570\u636e\u5c01\u88c5\u6210 TCP \u62a5\u6587，\u901a\u8fc7\u7f51\u7edc\u53d1\u7ed9\u5ba2\u6237\u7aef；\u5982\u679c\u53d1\u9001\u7f13\u51b2\u533a\u6ee1\u4e86，write() \u4f1a\u963b\u585e，\u76f4\u5230\u7f13\u51b2\u533a\u6709\u7a7a\u95f4\u5199\u5165\u3002<\/p>\n

    9. \u518d\u540e\u9762 n == 0 \u4ee3\u8868\u5ba2\u6237\u7aef\u5df2\u7ecf\u6b63\u5e38\u5173\u95ed\u4e86\u8fde\u63a5，\u6b64\u65f6\u670d\u52a1\u7aef\u4e5f\u5e94\u8be5\u9000\u51fa\u5faa\u73af，\u540e\u7eed\u5173\u95ed sockfd，\u91ca\u653e\u8d44\u6e90；n < 0 \u4ee3\u8868\u8bfb\u53d6\u51fa\u9519（\u6bd4\u5982\u5ba2\u6237\u7aef\u5f02\u5e38\u6389\u7ebf\u3001\u7f51\u7edc\u9519\u8bef），\u6b64\u65f6\u4e5f\u8981\u9000\u51fa\u5faa\u73af，\u5173\u95ed\u8fde\u63a5\u3002<\/p>\n

    EchoTcpServerMain.cc \u670d\u52a1\u7aef:<\/h3>\n

    \"\"\u4e3b\u6587\u4ef6\u662f TCP \u56de\u663e\u670d\u52a1\u5668\u7684\u5165\u53e3，\u9996\u5148\u6821\u9a8c\u547d\u4ee4\u884c\u53c2\u6570，\u8981\u6c42\u8fd8\u8981\u7528\u6237\u4f20\u5165\u7aef\u53e3\u53f7；\u968f\u540e\u5f00\u542f\u63a7\u5236\u53f0\u65e5\u5fd7\u7cfb\u7edf，\u5c06\u7aef\u53e3\u53f7\u5b57\u7b26\u4e32\u8f6c\u4e3a\u6574\u6570，\u7528\u4e8e\u521b\u5efa\u670d\u52a1\u5668\u5b9e\u4f8b；\u901a\u8fc7\u667a\u80fd\u6307\u9488\u7ba1\u7406 TcpServer \u5bf9\u8c61，\u8c03\u7528 InitServer() \u5b8c\u6210\u5957\u63a5\u5b57\u521b\u5efa\u3001\u7ed1\u5b9a\u4e0e\u76d1\u542c\u7684\u521d\u59cb\u5316\u5de5\u4f5c，\u518d\u8c03\u7528 Start() \u542f\u52a8\u670d\u52a1，\u8fdb\u5165\u76d1\u542c\u5faa\u73af，\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5\u5e76\u5904\u7406\u901a\u4fe1\u3002<\/p>\n

    EchoTcpClient.cc \u5ba2\u6237\u7aef:<\/h3>\n

    \"\"<\/p>\n

    \u8fd9\u662f\u4e00\u4e2a\u5ba2\u6237\u7aef\u7684\u4e3b\u51fd\u6570\u4ee3\u7801，\u5b83\u7684\u6838\u5fc3\u6d41\u7a0b\u662f：<\/p>\n

  • \u63a5\u6536\u547d\u4ee4\u884c\u4f20\u5165\u7684\u670d\u52a1\u7aef IP \u548c\u7aef\u53e3\u53f7<\/li>\n
  • \u521b\u5efa\u5ba2\u6237\u7aef\u5957\u63a5\u5b57（socket）<\/li>\n
  • \u53d1\u8d77\u8fde\u63a5\u8bf7\u6c42（connect）<\/li>\n
  • \u4e0e\u670d\u52a1\u7aef\u8fdb\u884c\u4ea4\u4e92：\u7528\u6237\u8f93\u5165\u6d88\u606f \u2192 \u53d1\u9001\u7ed9\u670d\u52a1\u7aef \u2192 \u63a5\u6536\u56de\u663e\u5e76\u6253\u5370<\/li>\n
  • \u5904\u7406\u8fde\u63a5\u65ad\u5f00\u4e0e\u9519\u8bef<\/li>\n

    1. \u7b2c\u4e00\u6b65\u662f\u547d\u4ee4\u884c\u53c2\u6570\u6821\u9a8c\u4e0e\u89e3\u6790，\u5ba2\u6237\u7aef\u8fd0\u884c\u65f6\u5fc5\u987b\u4f20\u5165\u4e24\u4e2a\u53c2\u6570：\u670d\u52a1\u7aef IP\u548c\u670d\u52a1\u7aef\u7aef\u53e3\u53f7\u3002\u5f53\u53c2\u6570\u4e2a\u6570\u4e0d\u5bf9\u65f6，\u6253\u5370\u7528\u6cd5\u63d0\u793a\u3002\u628a\u547d\u4ee4\u884c\u4f20\u5165\u7684 IP \u5b57\u7b26\u4e32\u5b58\u5165 server_ip，\u7aef\u53e3\u53f7\u5b57\u7b26\u4e32\u8f6c\u6210\u6574\u6570\u5b58\u5165 server_port，\u4e3a\u540e\u7eed\u8fde\u63a5\u505a\u51c6\u5907\u3002<\/p>\n

    2. \u7b2c\u4e8c\u6b65\u5c31\u662f\u5ba2\u6237\u7aef\u521b\u5efa\u5ba2\u6237\u7aef\u5957\u63a5\u5b57（socket），\u8fd9\u4e00\u6b65\u548c\u670d\u52a1\u7aef\u521b\u5efa\u00a0socket \u4e00\u6837，\u521b\u5efa\u00a0socket() \u65f6，\u5185\u6838\u4f1a\u4e3a\u5ba2\u6237\u7aef\u521b\u5efa\u4e00\u4e2a\u4e13\u5c5e\u7684\u7f51\u7edc\u6587\u4ef6\u5bf9\u8c61，\u5305\u542b\u6536\u53d1\u7f13\u51b2\u533a\u3001\u534f\u8bae\u72b6\u6001\u7b49\u4fe1\u606f，\u5e76\u8fd4\u56de\u6587\u4ef6\u63cf\u8ff0\u7b26 sockfd \u7ed9\u7528\u6237\u6001\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\u5ba2\u6237\u7aef\u4e0d\u9700\u8981\u624b\u52a8 bind() \u7ed1\u5b9a\u7aef\u53e3，\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u81ea\u52a8\u4e3a\u5ba2\u6237\u7aef\u5206\u914d\u4e00\u4e2a\u4e34\u65f6\u7aef\u53e3，\u907f\u514d\u7aef\u53e3\u51b2\u7a81\u3002<\/p>\n

    3. \u7b2c\u4e09\u90e8\u6784\u9020\u670d\u52a1\u7aef\u5730\u5740\u4fe1\u606f，InetAddr serveraddress(server_port, server_ip) \u5c31\u662f\u628a\u4f20\u5165\u7684\u670d\u52a1\u7aef IP \u548c\u7aef\u53e3，\u5c01\u88c5\u6210\u6211\u4eec\u81ea\u5df1\u7684 InetAddr \u5bf9\u8c61，\u5e95\u5c42\u662f struct sockaddr_in \u7ed3\u6784\u4f53，\u7528\u6765\u4f20\u9012\u7ed9 connect \u7cfb\u7edf\u8c03\u7528\u3002<\/p>\n

    connect()<\/h4>\n

    \"\" connect() \u7684\u4f5c\u7528\u5c31\u662f\u5411\u6307\u5b9a\u7684\u670d\u52a1\u7aef\u53d1\u8d77 TCP \u8fde\u63a5\u8bf7\u6c42，\u5b8c\u6210\u4e09\u6b21\u63e1\u624b\u3002\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u5ba2\u6237\u7aef\u81ea\u5df1\u7684 socket fd，\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u670d\u52a1\u7aef\u5730\u5740\u7ed3\u6784\u4f53，\u7b2c\u4e09\u4e2a\u53c2\u6570\u662f\u5730\u5740\u7ed3\u6784\u4f53\u957f\u5ea6\u3002<\/p>\n<\/p>\n

    connect \u5c31\u662f\u5728\u544a\u8bc9\u5185\u6838\u4e09\u4ef6\u4e8b : \u6211\u5ba2\u6237\u7aef\u8981\u7528 sockfd \u8fd9\u4e2a\u5957\u63a5\u5b57，\u53bb\u8fde\u63a5 serveraddress \u91cc\u8fd9\u4e2a\u670d\u52a1\u7aef\u5730\u5740，\u800c\u8fd9\u4e2a\u5730\u5740\u7ed3\u6784\u4f53\u7684\u5927\u5c0f\u662f addrlen\u3002<\/p>\n

    4. \u7b2c\u56db\u90e8\u5c31\u662f\u5ba2\u6237\u7aef\u5411\u670d\u52a1\u7aef\u7684\u901a\u4fe1\u73af\u8282，\u8fd9\u90e8\u5206\u662f\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\u7684\u4ea4\u4e92\u903b\u8f91，\u548c\u670d\u52a1\u7aef\u7684 serviceIO \u51fd\u6570\u662f\u53cc\u5411\u5bf9\u5e94\u7684：<\/p>\n

    \"\"\u4ece\u7ec8\u7aef\u8bfb\u53d6\u7528\u6237\u8f93\u5165\u7684\u4e00\u884c\u6d88\u606f，\u5b58\u5165 line \u5b57\u7b26\u4e32；write() \u628a\u7528\u6237\u8f93\u5165\u7684\u6d88\u606f\u5199\u5165\u5ba2\u6237\u7aef socket \u7684\u53d1\u9001\u7f13\u51b2\u533a，\u5185\u6838\u81ea\u52a8\u901a\u8fc7 TCP \u534f\u8bae\u53d1\u9001\u7ed9\u670d\u52a1\u7aef\u3002<\/p>\n

    \"\" read() \u4ece\u5ba2\u6237\u7aef socket \u7684\u63a5\u6536\u7f13\u51b2\u533a\u8bfb\u53d6\u670d\u52a1\u7aef\u53d1\u56de\u6765\u7684\u56de\u663e\u6570\u636e； n > 0 \u8868\u793a\u8bfb\u53d6\u6210\u529f，\u628a\u6570\u636e\u62f7\u8d1d\u5230 inbuffer，\u624b\u52a8\u52a0 \\\\0 \u8f6c\u6210\u5b57\u7b26\u4e32，\u6253\u5370\u5230\u7ec8\u7aef； n == 0 \u8868\u793a\u670d\u52a1\u7aef\u6b63\u5e38\u65ad\u5f00\u8fde\u63a5，\u9000\u51fa\u5faa\u73af； n < 0 \u8868\u793a\u8bfb\u53d6\u9519\u8bef（\u6bd4\u5982\u7f51\u7edc\u5f02\u5e38），\u9000\u51fa\u5faa\u73af\u3002<\/p>\n

    \u81f3\u6b64\u6574\u4e2a\u670d\u52a1\u7aef\u548c\u5ba2\u6237\u7aef\u7684\u4ee3\u7801\u903b\u8f91\u5c31\u8bb2\u5b8c\u4e86\u3002\u4e0b\u9762\u6211\u4eec\u770b\u8fd0\u884c\u7ed3\u679c:<\/p>\n

    \u8fd0\u884c\u7ed3\u679c:<\/h3>\n

    \"\"\u670d\u52a1\u7aef\u542f\u52a8\u521d\u59cb\u5316\u6210\u529f，\u521b\u5efa\u5957\u63a5\u5b57\u3001\u7ed1\u5b9a\u548c\u76d1\u542c\u90fd\u5df2\u6210\u529f\u3002<\/p>\n

    \"\"\u5ba2\u6237\u7aef\u542f\u52a8\u5e76\u6210\u529f\u8fde\u63a5\u670d\u52a1\u7aef，\u5ba2\u6237\u7aef connect() \u8c03\u7528\u6210\u529f，TCP \u8fde\u63a5\u5efa\u7acb\u3002please Enter#：\u5ba2\u6237\u7aef\u8fdb\u5165\u7b49\u5f85\u7528\u6237\u8f93\u5165\u7684\u72b6\u6001，\u51c6\u5907\u53d1\u9001\u6d88\u606f\u3002<\/p>\n

    \"\"\u670d\u52a1\u7aef accept \u6210\u529f，\u62ff\u5230\u5ba2\u6237\u7aef\u8fde\u63a5\u3002accept() \u8c03\u7528\u6210\u529f\u540e ，\u5185\u6838\u4e3a\u8fd9\u4e2a\u5ba2\u6237\u7aef\u521b\u5efa\u4e86\u4e13\u5c5e\u7684\u901a\u4fe1\u5957\u63a5\u5b57，\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e3a 4\u3002\u670d\u52a1\u7aef\u540c\u65f6\u4e5f\u62ff\u5230\u4e86\u5ba2\u6237\u7aef\u7684 IP \u548c\u4e34\u65f6\u7aef\u53e3\u53f7，\u8bc1\u660e\u5ba2\u6237\u7aef\u8fde\u63a5\u5df2\u7ecf\u88ab\u670d\u52a1\u7aef\u63a5\u6536\u3002<\/p>\n

    \"\"\u5ba2\u6237\u7aef\u8f93\u5165\u4e2d\u5348\u597d，\u53d1\u9001\u7ed9\u670d\u52a1\u7aef；\u6536\u5230\u670d\u52a1\u7aef\u56de\u663e server echo# \u4e2d\u5348\u597d\u3002\u8bc1\u660e\u6210\u529f\u6536\u5230\u4e86\u5ba2\u6237\u7aef\u7684\u6d88\u606f；\u5e76\u5411\u5ba2\u6237\u7aef\u53d1\u9001\u4e86\u56de\u663e\u6570\u636e\u3002\u6b64\u65f6\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\u5b8c\u6210\u4e86\u53cc\u5411\u6570\u636e\u6536\u53d1，\u56de\u663e\u529f\u80fd\u6b63\u5e38，\u957f\u8fde\u63a5\u901a\u4fe1\u6d41\u7a0b\u8dd1\u901a\u3002<\/p>\n

    \u603b\u7ed3:<\/h3>\n

    \u5728\u6211\u4eec\u7684\u7b2c\u4e00\u9636\u6bb5\u5b9e\u73b0\u4e2d，\u5355\u8fdb\u7a0b\u548c\u5355\u7ebf\u7a0b\u662f\u7b49\u4ef7\u7684\u6982\u5ff5：\u6211\u4eec\u670d\u52a1\u7aef\u7684\u7a0b\u5e8f\u53ea\u6709\u4e00\u4e2a\u8fdb\u7a0b，\u8fd9\u4e2a\u8fdb\u7a0b\u91cc\u4e5f\u53ea\u6709\u4e00\u4e2a\u4e3b\u7ebf\u7a0b，\u6ca1\u6709\u4efb\u4f55\u989d\u5916\u7684\u7ebf\u7a0b\u6216\u8fdb\u7a0b\u3002<\/p>\n

    \u56e0\u6b64，\u8fd9\u4e2a\u670d\u52a1\u7aef\u6a21\u578b\u662f\u4e32\u884c\u6267\u884c\u7684：\u670d\u52a1\u7aef\u7684\u4e3b\u7ebf\u7a0b\u5fc5\u987b\u5b8c\u6574\u5904\u7406\u5b8c\u5f53\u524d\u5ba2\u6237\u7aef\u7684\u6240\u6709\u6536\u53d1\u903b\u8f91(\u76f4\u5230\u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5），\u624d\u80fd\u56de\u5230 accept() \u8c03\u7528，\u53bb\u63a5\u6536\u4e0b\u4e00\u4e2a\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42\u3002<\/p>\n

    \u8fd9\u5c31\u5bfc\u81f4\u4e86\u4e00\u4e2a\u76f4\u63a5\u7684\u7ed3\u679c：\u8fd9\u4e2a\u670d\u52a1\u7aef\u6ca1\u6709\u4efb\u4f55\u5e76\u53d1\u80fd\u529b\u3002\u540c\u4e00\u65f6\u95f4\u53ea\u80fd\u670d\u52a1\u4e00\u4e2a\u5ba2\u6237\u7aef，\u540e\u7eed\u7684\u5ba2\u6237\u7aef\u8fde\u63a5\u4f1a\u6392\u961f\u7b49\u5f85，\u751a\u81f3\u53ef\u80fd\u56e0\u4e3a\u7b49\u5f85\u8d85\u65f6\u800c\u5931\u8d25\u3002<\/p>\n

    \u6240\u4ee5\u6211\u4eec\u5c06\u8fdb\u5165\u7b2c\u4e8c\u9636\u6bb5\u7684\u6539\u9020：\u5f15\u5165\u591a\u8fdb\u7a0b\u6a21\u578b，\u4e3a\u6bcf\u4e00\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u521b\u5efa\u72ec\u7acb\u7684\u5b50\u8fdb\u7a0b\u5904\u7406\u901a\u4fe1，\u5b9e\u73b0\u5e76\u53d1\u670d\u52a1\u3002<\/p>\n

    \u56db\u3001\u9636\u6bb5\u4e8c\u00a0: \u591a\u8fdb\u7a0b\u7248\u672c<\/h2>\n

    \u903b\u8f91\u68b3\u7406:<\/h3>\n

    \u5728\u591a\u8fdb\u7a0b\u6539\u9020\u4e2d，\u6211\u4eec\u91c7\u7528\u4e3b\u8fdb\u7a0b\u8d1f\u8d23\u8fde\u63a5\u3001\u5b50\u8fdb\u7a0b\u8d1f\u8d23\u901a\u4fe1<\/span>\u7684\u5206\u5de5\u6a21\u578b：\u670d\u52a1\u7aef\u4e3b\u8fdb\u7a0b\u7684\u804c\u8d23\u4ec5\u4fdd\u7559\u4e3a accept() \u63a5\u6536\u5ba2\u6237\u7aef\u8fde\u63a5\u8bf7\u6c42；\u6bcf\u5f53\u6210\u529f\u5efa\u7acb\u4e00\u4e2a\u65b0\u8fde\u63a5，\u4e3b\u8fdb\u7a0b\u5c31\u901a\u8fc7 fork() \u521b\u5efa\u4e00\u4e2a\u5b50\u8fdb\u7a0b，\u5c06\u8be5\u5ba2\u6237\u7aef\u7684\u901a\u4fe1\u5957\u63a5\u5b57\u4ea4\u7ed9\u5b50\u8fdb\u7a0b\u5904\u7406，\u7531\u5b50\u8fdb\u7a0b\u6267\u884c serviceIO() \u51fd\u6570，\u5b8c\u6210\u4e0e\u5ba2\u6237\u7aef\u7684\u8bfb\u5199\u4ea4\u4e92\u4e0e\u56de\u663e\u3002\u4e3b\u8fdb\u7a0b\u5219\u7acb\u523b\u56de\u5230\u5faa\u73af，\u7ee7\u7eed\u76d1\u542c\u548c\u63a5\u6536\u4e0b\u4e00\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u3002\u8fd9\u79cd\u5206\u5de5\u8ba9\u670d\u52a1\u7aef\u80fd\u591f\u540c\u65f6\u5904\u7406\u591a\u4e2a\u5ba2\u6237\u7aef\u8bf7\u6c42，\u5b9e\u73b0\u5e76\u53d1\u670d\u52a1\u80fd\u529b\u3002<\/p>\n

    \u5f15\u53d1\u7684\u95ee\u9898:<\/h3>\n

    \u5f15\u5165\u591a\u8fdb\u7a0b\u6a21\u578b\u540e，\u6211\u4eec\u5b9e\u73b0\u4e86 \u201c\u4e3b\u8fdb\u7a0b\u4e13\u5fc3 accept\u3001\u5b50\u8fdb\u7a0b\u8d1f\u8d23\u901a\u4fe1\u201d \u7684\u5e76\u53d1\u5206\u5de5，\u4f46\u4e5f\u968f\u4e4b\u5e26\u6765\u4e86\u4e00\u4e2a\u65b0\u7684\u95ee\u9898：\u5b50\u8fdb\u7a0b\u9000\u51fa\u540e，\u5982\u679c\u7236\u8fdb\u7a0b\u4e0d\u4e3b\u52a8\u8c03\u7528 wait()\/waitpid() \u56de\u6536\u5b83\u7684\u9000\u51fa\u72b6\u6001，\u5b50\u8fdb\u7a0b\u5c31\u4f1a\u53d8\u6210 \u201c\u50f5\u5c38\u8fdb\u7a0b\u201d，\u957f\u671f\u5360\u7528\u7cfb\u7edf\u8d44\u6e90\u3002<\/p>\n

    \u800c\u5982\u679c\u8ba9\u4e3b\u8fdb\u7a0b\u5728 accept() \u7684\u540c\u65f6，\u518d\u53bb\u963b\u585e\u7b49\u5f85\u5e76\u5904\u7406\u5b50\u8fdb\u7a0b\u56de\u6536，\u5c31\u4f1a\u7834\u574f \u201c\u4e3b\u8fdb\u7a0b\u53ea\u8d1f\u8d23\u63a5\u6536\u8fde\u63a5\u201d \u7684\u8bbe\u8ba1\u521d\u8877，\u8ba9\u4e3b\u8fdb\u7a0b\u518d\u6b21\u9677\u5165 \u201c\u65e2\u8981 accept \u53c8\u8981\u56de\u6536\u5b50\u8fdb\u7a0b\u201d \u7684\u53cc\u91cd\u804c\u8d23\u4e2d，\u5bfc\u81f4\u4e3b\u8fdb\u7a0b\u963b\u585e\u5728\u56de\u6536\u64cd\u4f5c\u4e0a，\u65e0\u6cd5\u53ca\u65f6\u54cd\u5e94\u65b0\u7684\u5ba2\u6237\u7aef\u8fde\u63a5\u8bf7\u6c42，\u5931\u53bb\u4e86\u591a\u8fdb\u7a0b\u5e76\u53d1\u7684\u610f\u4e49\u3002<\/p>\n

    \u89e3\u51b3\u65b9\u6cd5:<\/h3>\n

    \u90a3\u89e3\u51b3\u65b9\u6cd5\u662f\u4ec0\u4e48\u5462? \u6709\u4e24\u79cd\u89e3\u51b3\u65b9\u6cd5，\u6211\u4eec\u9010\u4e2a\u6765\u770b :<\/p>\n

    \u65b9\u6cd5\u4e00 : \u5f15\u5165\u5b59\u5b50\u8fdb\u7a0b<\/h5>\n

    \"\"<\/p>\n

    1. \u4e3b\u8fdb\u7a0b\u901a\u8fc7\u7b2c\u4e00\u6b21 fork() \u521b\u5efa\u5b50\u8fdb\u7a0b，\u968f\u540e\u5728\u5b50\u8fdb\u7a0b\u5185\u90e8\u6267\u884c\u7b2c\u4e8c\u6b21 fork() \u521b\u5efa\u5b59\u5b50\u8fdb\u7a0b，\u6b64\u65f6\u5b50\u8fdb\u7a0b\u76f4\u63a5\u8c03\u7528 exit(0) \u9000\u51fa\u3002\u6b64\u65f6，\u4e3b\u8fdb\u7a0b\u53ea\u9700\u8c03\u7528 waitpid() \u56de\u6536\u8fd9\u4e2a\u77ac\u95f4\u9000\u51fa\u7684\u5b50\u8fdb\u7a0b，\u800c\u7531\u4e8e\u5b50\u8fdb\u7a0b\u5df2\u7ecf\u9000\u51fa，waitpid()\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u963b\u585e，\u4e3b\u8fdb\u7a0b\u53ef\u4ee5\u7acb\u5373\u56de\u5230 accept() \u5faa\u73af，\u7ee7\u7eed\u63a5\u6536\u4e0b\u4e00\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u3002\u540c\u65f6，\u88ab\u521b\u5efa\u51fa\u6765\u7684\u5b59\u5b50\u8fdb\u7a0b\u56e0\u4e3a\u5b50\u8fdb\u7a0b\u5df2\u7ecf\u9000\u51fa\u4e86，\u6240\u4ee5\u5c31\u4f1a\u6210\u4e3a\u5b64\u513f\u8fdb\u7a0b，\u5b64\u513f\u8fdb\u7a0b\u7531\u7cfb\u7edf init \u8fdb\u7a0b\u63a5\u7ba1，\u5b59\u5b50\u8fdb\u7a0b\u5c31\u5c06\u6267\u884c\u4e0e\u5ba2\u6237\u7aef\u7684 serviceIO \u901a\u4fe1\u903b\u8f91，\u901a\u4fe1\u7ed3\u675f\u540e\u9000\u51fa\u65f6\u4f1a\u88ab\u7cfb\u7edf\u81ea\u52a8\u56de\u6536，\u4e0d\u4f1a\u4ea7\u751f\u50f5\u5c38\u8fdb\u7a0b，\u4e5f\u65e0\u9700\u4e3b\u8fdb\u7a0b\u989d\u5916\u5904\u7406\u3002<\/p>\n

    2. \u5728\u4e24\u6b21 fork \u7684\u5e76\u53d1\u6a21\u578b\u4e2d，\u4e09\u4e2a\u8fdb\u7a0b\u5404\u53f8\u5176\u804c，\u804c\u8d23\u5b8c\u5168\u5206\u79bb，\u4e0d\u5b58\u5728\u4efb\u4f55\u51b2\u7a81：<\/p>\n

    \u4e3b\u8fdb\u7a0b：\u4ec5\u8d1f\u8d23\u521b\u5efa\u5b50\u8fdb\u7a0b，\u968f\u540e\u7acb\u5373\u8c03\u7528 waitpid() \u56de\u6536\u5b83；\u56de\u6536\u5b8c\u6210\u540e\u7acb\u523b\u56de\u5230\u5faa\u73af，\u7ee7\u7eed\u6267\u884c accept() \u63a5\u6536\u65b0\u7684\u5ba2\u6237\u7aef\u8fde\u63a5，\u5168\u7a0b\u4e0d\u963b\u585e\u3001\u4e0d\u53c2\u4e0e\u4efb\u4f55\u4e1a\u52a1\u901a\u4fe1\u3002<\/p>\n<\/p>\n

    \u5b50\u8fdb\u7a0b：\u4ec5\u8d1f\u8d23\u521b\u5efa\u5b59\u5b50\u8fdb\u7a0b，\u521b\u5efa\u5b8c\u6210\u540e\u7acb\u523b\u8c03\u7528 exit(0) \u9000\u51fa，\u6210\u4e3a\u4e00\u4e2a\u4e00\u6b21\u6027\u7684 \u201c\u8fc7\u6e21\u8fdb\u7a0b\u201d，\u7531\u4e3b\u8fdb\u7a0b\u5feb\u901f\u56de\u6536，\u4e0d\u5360\u7528\u4efb\u4f55\u7cfb\u7edf\u8d44\u6e90\u3002<\/p>\n<\/p>\n

    \u5b59\u5b50\u8fdb\u7a0b：\u88ab\u521b\u5efa\u540e\u6210\u4e3a\u5b64\u513f\u8fdb\u7a0b，\u7531\u7cfb\u7edfinit\u8fdb\u7a0b\u63a5\u7ba1；\u5b83\u5c06\u6267\u884c\u4e0e\u5ba2\u6237\u7aef\u7684 serviceIO \u901a\u4fe1\u903b\u8f91，\u901a\u4fe1\u7ed3\u675f\u540e\u6b63\u5e38\u9000\u51fa，\u9000\u51fa\u72b6\u6001\u7531\u7cfb\u7edf\u81ea\u52a8\u56de\u6536，\u4e0d\u4f1a\u4ea7\u751f\u50f5\u5c38\u8fdb\u7a0b，\u4e5f\u65e0\u9700\u4e3b\u8fdb\u7a0b\u989d\u5916\u5904\u7406\u3002<\/p>\n

    3. \u4ed4\u7ec6\u601d\u8003，\u6b64\u65f6\u4ecd\u7136\u5b58\u5728\u9690\u60a3\u95ee\u9898，\u5728 fork() \u521b\u5efa\u8fdb\u7a0b\u65f6，\u5b50\u8fdb\u7a0b\u4f1a\u5b8c\u6574\u590d\u5236\u7236\u8fdb\u7a0b\u7684 task_struct \u8fdb\u7a0b\u7ed3\u6784\u4f53，\u5305\u62ec\u5b83\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868<\/span>\u3002\u56e0\u6b64，\u5f53\u4e3b\u8fdb\u7a0b accept() \u62ff\u5230\u5ba2\u6237\u7aef\u8fde\u63a5（\u540c\u65f6\u6301\u6709\u76d1\u542c\u5957\u63a5\u5b57 _listensockfd \u548c\u901a\u4fe1\u5957\u63a5\u5b57\u00a0sockfd \u540e，fork() \u51fa\u6765\u7684\u5b50\u8fdb\u7a0b\u3001\u518d fork() \u51fa\u6765\u7684\u5b59\u5b50\u8fdb\u7a0b，\u5b83\u4eec\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868\u4e2d，\u90fd\u4f1a\u540c\u65f6\u5b58\u5728\u8fd9\u4e24\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002<\/p>\n

    4. \u4f46\u4e09\u4e2a\u8fdb\u7a0b\u7684\u804c\u8d23\u5b8c\u5168\u4e0d\u540c，\u56e0\u6b64\u5fc5\u987b\u9488\u5bf9\u6027\u5730\u5173\u95ed\u81ea\u5df1\u4e0d\u9700\u8981\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26，\u5426\u5219\u4f1a\u5bfc\u81f4\u6587\u4ef6\u63cf\u8ff0\u7b26\u6cc4\u6f0f\u548c\u8fde\u63a5\u65e0\u6cd5\u6b63\u5e38\u5173\u95ed\u7684\u95ee\u9898：<\/span><\/p>\n

    \u4e3b\u8fdb\u7a0b：\u5b83\u53ea\u8d1f\u8d23 accept \u65b0\u8fde\u63a5，\u4e0d\u9700\u8981\u548c\u5ba2\u6237\u7aef\u901a\u4fe1，\u56e0\u6b64\u5b83\u5fc5\u987b\u5173\u95ed\u81ea\u5df1\u7684\u901a\u4fe1\u5957\u63a5\u5b57 sockfd\u3002<\/p>\n<\/p>\n

    \u5b59\u5b50\u8fdb\u7a0b：\u5b83\u53ea\u8d1f\u8d23\u548c\u5ba2\u6237\u7aef\u8fdb\u884c serviceIO \u901a\u4fe1，\u4e0d\u518d\u9700\u8981\u76d1\u542c\u65b0\u8fde\u63a5，\u56e0\u6b64\u5b83\u5fc5\u987b\u5173\u95ed\u81ea\u5df1\u7684\u76d1\u542c\u5957\u63a5\u5b57 _listensockfd\u3002<\/p>\n<\/p>\n

    \u5b50\u8fdb\u7a0b：\u5b83\u53ea\u662f\u4e00\u4e2a \u201c\u8fc7\u6e21\u8fdb\u7a0b\u201d，\u521b\u5efa\u5b59\u5b50\u8fdb\u7a0b\u540e\u4f1a\u7acb\u523b exit() \u9000\u51fa，\u8fdb\u7a0b\u9000\u51fa\u65f6\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u81ea\u52a8\u5173\u95ed\u5b83\u6301\u6709\u7684\u6240\u6709\u6587\u4ef6\u63cf\u8ff0\u7b26，\u56e0\u6b64\u5b83\u4e0d\u9700\u8981\u624b\u52a8\u5173\u95ed\u4efb\u4f55 fd\u3002<\/p>\n

    5.\u00a0\u901a\u8fc7\u8fd9\u6837\u7684\u5206\u5de5\u548c\u5173\u95ed\u64cd\u4f5c，\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u53ea\u4fdd\u7559\u81ea\u5df1\u4e1a\u52a1\u6240\u9700\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26，\u65e2\u907f\u514d\u4e86\u8d44\u6e90\u6cc4\u6f0f，\u4e5f\u4fdd\u8bc1\u4e86 TCP \u8fde\u63a5\u7684\u6b63\u5e38\u751f\u547d\u5468\u671f\u7ba1\u7406\u3002<\/p>\n

    \u65b9\u6cd5\u4e8c : \u5f15\u5165\u4fe1\u53f7<\/h5>\n

    \"\"\u8fd9\u4e2a\u4fe1\u53f7\u5982\u4e0a，\u5f53\u7236\u8fdb\u7a0b\u5728 fork() \u4e4b\u524d\u6267\u884c\u8fd9\u4e2a\u4fe1\u53f7\u540e\u5c31\u4ee3\u8868\u7740\u544a\u8bc9\u64cd\u4f5c\u7cfb\u7edf：\u6240\u6709\u5b50\u8fdb\u7a0b\u9000\u51fa\u540e，\u7531\u64cd\u4f5c\u7cfb\u7edf\u81ea\u5df1\u81ea\u52a8\u56de\u6536，\u7236\u8fdb\u7a0b\u6b64\u65f6\u4e0d\u4f1a\u7ba1\u7406\u4e86\u3002\u64cd\u4f5c\u7cfb\u7edf\u6536\u5230\u8fd9\u4e2a\u6307\u4ee4\u540e，\u5b50\u8fdb\u7a0b\u9000\u51fa\u65f6\u5c31\u4f1a\u88ab\u7cfb\u7edf\u81ea\u52a8\u6e05\u7406，\u4e0d\u4f1a\u53d8\u6210\u50f5\u5c38\u8fdb\u7a0b\u3002\u7236\u8fdb\u7a0b\u5c31\u4e0d\u7528\u5199 wait() \/ waitpid()，\u4e5f\u4e0d\u7528\u64cd\u5fc3\u4efb\u4f55\u56de\u6536\u3002<\/p>\n

    \u539f\u7406\u5c31\u662f\u5b50\u8fdb\u7a0b\u9000\u51fa\u65f6，\u5185\u6838\u4f1a\u7ed9\u7236\u8fdb\u7a0b\u53d1\u4e00\u4e2a\u4fe1\u53f7：SIGCHLD\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u7236\u8fdb\u7a0b\u5fc5\u987b\u8c03\u7528 wait\/waitpid \u53bb\u56de\u6536，\u5426\u5219\u5b50\u8fdb\u7a0b\u53d8\u50f5\u5c38\u3002\u4f46\u662f\u5f53\u6211\u4eec\u6267\u884c\u4e86\u8fd9\u4e2a signal(SIGCHLD, SIG_IGN); \u4ee3\u7801\u540e，\u5c31\u610f\u5473\u7740\u7236\u8fdb\u7a0b，\u9009\u62e9\u3010\u5ffd\u7565\u3011\u6240\u6709\u5b50\u8fdb\u7a0b\u9000\u51fa\u4fe1\u53f7\u3002\u8fd9\u4e2a\u65f6\u5019\u4e5f\u5c31\u4e0d\u5b58\u5728\u4e0a\u8ff0\u7684\u6240\u6709\u95ee\u9898，\u6b64\u65f6\u7236\u5b50\u8fdb\u7a0b\u5c31\u53ef\u4ee5\u5404\u505a\u5404\u7684\u4e8b\u3002<\/p>\n

    \u6240\u4ee5\u65b9\u6848\u4e8c\u662f\u6bd4\u65b9\u6848\u4e00\u66f4\u7b80\u5355\u7684\u89e3\u51b3\u65b9\u6848\u3002\u4f46\u662f\u8fd9\u4e24\u79cd\u89e3\u51b3\u65b9\u6cd5\u90fd\u53ef\u4ee5\u3002\u8fd9\u91cc\u6211\u4eec\u5c31\u91c7\u53d6\u7b2c\u4e00\u79cd\u65b9\u6cd5\u4e86\u3002<\/p>\n

    \u8fd0\u884c\u7ed3\u679c:<\/h3>\n

    \u6b64\u65f6\u6211\u4eec\u5c31\u5c06\u670d\u52a1\u7aef\u6210\u529f\u7684\u6539\u9020\u4e3a\u591a\u8fdb\u7a0b\u7684\u5e76\u53d1\u6a21\u578b\u3001\u6211\u4eec\u53ea\u5728\u670d\u52a1\u7aef accept \u6210\u529f\u4e4b\u540e，\u65b0\u589e\u4e24\u5c42 fork \u7684\u76f8\u5173\u903b\u8f91，\u5176\u4f59\u7684\u6240\u6709\u4ee3\u7801\u90fd\u4e0d\u7528\u6539\u52a8\u3002\u4e0b\u9762\u6211\u4eec\u770b\u8fd0\u884c\u7ed3\u679c :<\/p>\n

    \"\" \u521d\u59cb\u5316\u9636\u6bb5\u65e5\u5fd7\u663e\u793a\u670d\u52a1\u7aef\u6210\u529f\u5b8c\u6210 socket \u521b\u5efa\u3001bind \u7ed1\u5b9a\u3001listen \u76d1\u542c\u4e09\u6b65\u521d\u59cb\u5316，\u7aef\u53e3 8080 \u5904\u4e8e\u6b63\u5e38\u76d1\u542c\u72b6\u6001\u3002\u4e09\u6b21\u8fde\u63a5\u5efa\u7acb\u65e5\u5fd7\u91cc\u51fa\u73b0\u4e86\u4e09\u6b21 accept success, sockfd: 4，\u8bf4\u660e\u6709\u4e09\u4e2a\u5ba2\u6237\u7aef\u6210\u529f\u7684\u8fde\u63a5\u4e0a\u4e86\u670d\u52a1\u7aef，\u4e3b\u8fdb\u7a0b\u4e09\u6b21\u6210\u529f\u63a5\u6536\u4e86\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42\u3002<\/p>\n<\/p>\n

    \u8fd9\u91cc\u6211\u4eec\u9700\u8981\u6ce8\u610f\u7684\u662f\u4e09\u6b21 accept \u90fd\u8fd4\u56de sockfd: 4，\u4e0d\u662f\u56e0\u4e3a\u6587\u4ef6\u63cf\u8ff0\u7b26\u51b2\u7a81，\u800c\u662f\u56e0\u4e3a\u4e3b\u8fdb\u7a0b\u6bcf\u6b21 accept \u540e\u90fd\u4f1a\u7acb\u523b close \u901a\u4fe1\u5957\u63a5\u5b57，\u8ba9 4 \u53f7\u6587\u4ef6\u63cf\u8ff0\u7b26\u56de\u5230\u7a7a\u95f2\u72b6\u6001，\u5185\u6838\u4f1a\u5c06\u5b83\u91cd\u65b0\u5206\u914d\u7ed9\u4e0b\u4e00\u6b21 accept\u3002<\/p>\n

    \"\"\u4e09\u4e2a\u5ba2\u6237\u7aef\u7a97\u53e3\u7684\u8868\u73b0\u4e00\u81f4：\u8fde\u63a5\u5efa\u7acb\u6210\u529f\u6bcf\u4e2a\u5ba2\u6237\u7aef\u90fd\u8f93\u51fa\u4e86 connect to [124.222.191.171:80 80] success!，\u8bf4\u660e\u8fde\u63a5\u5efa\u7acb\u6b63\u5e38\u3002\u6d88\u606f\u6536\u53d1\u6b63\u5e38\u3002 \u5ba2\u6237\u7aef 1 \u8f93\u5165 \u201c\u6211\u662f\u5ba2\u6237\u7aef 1\u201d，\u6536\u5230\u670d\u52a1\u7aef\u56de\u663e server echo# \u6211\u662f\u5ba2\u6237\u7aef1 \u5ba2\u6237\u7aef 2 \u8f93\u5165 \u201c\u6211\u662f\u5ba2\u6237\u7aef 2\u201d，\u6536\u5230\u670d\u52a1\u7aef\u56de\u663e server echo# \u6211\u662f\u5ba2\u6237\u7aef2 \u5ba2\u6237\u7aef 3 \u8f93\u5165 \u201c\u6211\u662f\u5ba2\u6237\u7aef 3\u201d，\u6536\u5230\u670d\u52a1\u7aef\u56de\u663e server echo# \u6211\u662f\u5ba2\u6237\u7aef3<\/p>\n

    \u5176\u5b9e\u5728\u5f53\u524d\u7684\u7ec8\u7aef\u754c\u9762\u4e0a，\u6211\u4eec\u662f\u65e0\u6cd5\u76f4\u89c2\u770b\u5230\u4e09\u4e2a\u8fdb\u7a0b\u662f \u201c\u540c\u65f6\u201d \u8fd0\u884c\u7684，\u56e0\u4e3a\u4e09\u4e2a\u5ba2\u6237\u7aef\u7684\u4ea4\u4e92\u7a97\u53e3\u662f\u5206\u5f00\u7684，\u6211\u4eec\u53ea\u80fd\u9010\u4e2a\u64cd\u4f5c\u3001\u9010\u4e2a\u770b\u56de\u663e，\u6ca1\u6cd5\u540c\u65f6\u770b\u5230\u4e09\u4e2a\u8fdb\u7a0b\u7684\u6267\u884c\u72b6\u6001\u3002\u4f46\u4ee3\u7801\u5c42\u9762，\u5b83\u4eec\u662f\u5e76\u53d1\u6267\u884c\u7684：\u4e09\u4e2a\u5b59\u5b50\u8fdb\u7a0b\u5404\u81ea\u72ec\u7acb\u5904\u7406\u5ba2\u6237\u7aef\u7684\u8bfb\u5199，\u4e3b\u8fdb\u7a0b\u4e5f\u5728\u540c\u65f6 accept \u65b0\u8fde\u63a5，\u5185\u6838\u4f1a\u8c03\u5ea6\u4e09\u4e2a\u8fdb\u7a0b\u4ea4\u66ff\u5360\u7528 CPU \u65f6\u95f4\u7247，\u5b9e\u73b0\u771f\u6b63\u7684\u5e76\u53d1\u3002<\/p>\n

    \u8fd8\u6709\u4e2a\u95ee\u9898\u5c31\u662f\u73b0\u5728\u8fd9\u4e2a\u8fd8\u4e0d\u5c5e\u4e8e\u804a\u5929\u5ba4\u9879\u76ee，\u5f53\u524d\u662f\u591a\u8fdb\u7a0b\u56de\u663e\u670d\u52a1\u5668，\u53ea\u662f \u201c\u5ba2\u6237\u7aef \u2194 \u670d\u52a1\u7aef\u201d \u7684\u4e00\u5bf9\u4e00\u901a\u4fe1\u6a21\u578b：\u6bcf\u4e2a\u5ba2\u6237\u7aef\u7684\u6d88\u606f\u4e0d\u4f1a\u8f6c\u53d1\u7ed9\u5176\u4ed6\u5ba2\u6237\u7aef\u3002\u804a\u5929\u5ba4\u9879\u76ee\u9700\u8981\u7684\u662f\u5e7f\u64ad\u6a21\u578b：\u670d\u52a1\u7aef\u9700\u8981\u628a\u4e00\u4e2a\u5ba2\u6237\u7aef\u7684\u6d88\u606f，\u8f6c\u53d1\u7ed9\u6240\u6709\u5176\u4ed6\u5728\u7ebf\u7684\u5ba2\u6237\u7aef，\u8fd9\u9700\u8981\u989d\u5916\u7684 \u201c\u5ba2\u6237\u7aef\u5217\u8868\u7ba1\u7406 + \u6d88\u606f\u5e7f\u64ad\u201d \u903b\u8f91\u3002<\/p>\n

    \u4ee3\u7801:<\/h3>\n

    EchoTcpServer.hpp :<\/p>\n

    #pragma once<\/p>\n

    #include <iostream>
    \n#include <string>
    \n#include <cstring>
    \n#include <unistd.h>
    \n#include <sys\/socket.h>
    \n#include <arpa\/inet.h>
    \n#include <netinet\/in.h>
    \n#include <sys\/wait.h>
    \n#include "InetAddr.hpp"
    \n#include "Logger.hpp"<\/p>\n

    using namespace NS_LOG_MODULE;<\/p>\n

    enum
    \n{
    \n SUCCESS = 0,
    \n USAGE_ERR,
    \n SOCKET_ERR,
    \n BIND_ERR,
    \n LISTEN_ERR,
    \n FORK_ERR
    \n};<\/p>\n

    static const int gbacklog = 16;
    \nstatic const uint16_t gport = 8888;<\/p>\n

    class TcpServer
    \n{
    \npublic:
    \n TcpServer(uint16_t port = gport) : _port(port)
    \n {
    \n }
    \n void InitServer()
    \n {
    \n \/\/ 1. \u521b\u5efasocket
    \n _listensockfd = socket(AF_INET, SOCK_STREAM, 0); \/\/ TCP
    \n if (_listensockfd < 0)
    \n {
    \n LOG(LogLevel::FATAL) << "create socket error";
    \n exit(SOCKET_ERR);
    \n }
    \n LOG(LogLevel::DEBUG) << "create socket success: " << _listensockfd;
    \n \/\/ 2. \u586b\u5145\u672c\u5730socket\u4fe1\u606f
    \n struct sockaddr_in local;
    \n memset(&local, 0, sizeof(local));
    \n local.sin_family = AF_INET;
    \n local.sin_port = htons(_port);
    \n local.sin_addr.s_addr = INADDR_ANY; \/\/ \u4efb\u610f\u5730\u5740bind<\/p>\n

    \/\/ 3. bind
    \n int n = bind(_listensockfd, (struct sockaddr *)&local, sizeof(local));
    \n if (n < 0)
    \n {
    \n LOG(LogLevel::FATAL) << "bind error";
    \n exit(BIND_ERR);
    \n }
    \n LOG(LogLevel::DEBUG) << "bind socket success";<\/p>\n

    \/\/ 4. tcp\u662f\u9762\u5411\u8fde\u63a5\u7684，\u6240\u4ee5，TCP\u670d\u52a1\u5668\u8981\u5904\u4e8e\u4e00\u79cd\u53eb\u505alisten，\u76d1\u542c\u72b6\u6001\u3002
    \n n = listen(_listensockfd, gbacklog);
    \n if (n < 0)
    \n {
    \n LOG(LogLevel::FATAL) << "listen error";
    \n exit(LISTEN_ERR);
    \n }
    \n LOG(LogLevel::DEBUG) << "listen socket success";
    \n }
    \n void serviceIO(int sockfd, InetAddr address)
    \n {
    \n \/\/ tcp sockfd, \u5168\u53cc\u5de5
    \n \/\/ \u957f\u670d\u52a1，\u957f\u8fde\u63a5
    \n LOG(LogLevel::DEBUG) << "clinet info is : " << address.ToString();
    \n while (true)
    \n {
    \n char inbuffer[1024] = {0};
    \n \/\/ \u8bfb
    \n ssize_t n = read(sockfd, inbuffer, sizeof(inbuffer) – 1);
    \n if (n > 0)
    \n {
    \n inbuffer[n] = 0;
    \n LOG(LogLevel::INFO) << address.ToString() << " say# " << inbuffer;<\/p>\n

    \/\/ \u5199
    \n std::string echo_string = "server echo# ";
    \n echo_string += inbuffer;<\/p>\n

    write(sockfd, echo_string.c_str(), echo_string.size());
    \n }
    \n else if (n == 0)
    \n {
    \n LOG(LogLevel::INFO) << "client quit, address: " << address.ToString();
    \n break;
    \n }
    \n else
    \n {
    \n LOG(LogLevel::ERROR) << "client read error, address: " << address.ToString();
    \n break;
    \n }
    \n }
    \n }<\/p>\n

    void Start()
    \n {
    \n signal(SIGCHLD, SIG_IGN); \/\/ \u6700\u4f73\u5b9e\u8df5
    \n while (true)
    \n {
    \n struct sockaddr_in clientaddr;
    \n socklen_t len = sizeof(clientaddr);
    \n \/\/ 5. \u83b7\u53d6\u8fde\u63a5
    \n int sockfd = accept(_listensockfd, (struct sockaddr *)&clientaddr, &len);
    \n if (sockfd < 0)
    \n {
    \n LOG(LogLevel::WARNING) << "accept errr!";
    \n continue;
    \n }
    \n LOG(LogLevel::DEBUG) << "accept success, sockfd: " << sockfd;
    \n \/\/ version 2: \u591a\u8fdb\u7a0b\u7248\u672c
    \n pid_t id = fork();
    \n if (id < 0)
    \n {
    \n LOG(LogLevel::FATAL) << "fork errr!";
    \n exit(FORK_ERR);
    \n }
    \n else if (id == 0)
    \n {
    \n \/\/ \u5173\u95ed\u6389\u81ea\u5df1\u4e0d\u9700\u8981\u7684sockfd
    \n close(_listensockfd);
    \n \/\/ \u5b50\u8fdb\u7a0b
    \n if (fork() > 0)
    \n exit(0); \/\/ \u5b50\u8fdb\u7a0b\u76f4\u63a5\u9000\u51fa<\/p>\n

    \/\/ \u5b59\u5b50\u8fdb\u7a0b – \u5b64\u513f\u8fdb\u7a0b
    \n InetAddr clientaddress(clientaddr);
    \n serviceIO(sockfd, clientaddress);
    \n close(sockfd);
    \n exit(0); \/\/ \u91cd\u8981
    \n }
    \n else
    \n {
    \n \/\/ \u7236\u8fdb\u7a0b
    \n \/\/ wait(id); waitpid: WNOHANG
    \n \/\/ \u5173\u95ed\u6389\u81ea\u5df1\u4e0d\u9700\u8981\u7684sockfd
    \n close(sockfd);
    \n pid_t rid = waitpid(id, nullptr, 0);
    \n (void)rid;
    \n }
    \n }
    \n }
    \n ~TcpServer()
    \n {
    \n close(_listensockfd);
    \n }<\/p>\n

    private:
    \n uint16_t _port;
    \n \/\/ \u4e0d\u9700\u8981\u663e\u793a\u5305\u542bip
    \n int _listensockfd;
    \n};<\/p>\n

    EchoServerTcpMain.cc :<\/p>\n

    #include "EchoTcpServer.hpp"
    \n#include <memory><\/p>\n

    static void Usage(const std::string &process)
    \n{
    \n std::cerr << "Usage:\\\\n\\\\t";
    \n std::cerr << process << " local_port" << std::endl;
    \n}<\/p>\n

    int main(int argc, char *argv[])
    \n{
    \n if (argc != 2)
    \n {
    \n Usage(argv[0]);
    \n exit(USAGE_ERR);
    \n }
    \n ENABLE_CONSOLE_LOG_STRATEGY();
    \n uint16_t server_port = std::stoi(argv[1]);<\/p>\n

    std::unique_ptr<TcpServer> tsvr = std::make_unique<TcpServer>(server_port);
    \n tsvr->InitServer();
    \n tsvr->Start();<\/p>\n

    return 0;
    \n} <\/p>\n

    EchoTcpClient.cc :<\/p>\n

    #include <iostream>
    \n#include <string>
    \n#include <cstdlib>
    \n#include <unistd.h>
    \n#include <sys\/socket.h>
    \n#include <arpa\/inet.h>
    \n#include <netinet\/in.h>
    \n#include "InetAddr.hpp"<\/p>\n

    static void Usage(const std::string &name)
    \n{
    \n std::cerr << "Usage:\\\\n\\\\t";
    \n std::cerr << name << " server_ip server_port" << std::endl;
    \n}<\/p>\n

    \/\/ .\/client_tcp server_ip server_port
    \nint main(int argc, char *argv[])
    \n{
    \n if (argc != 3)
    \n {
    \n Usage(argv[0]);
    \n exit(1);
    \n }
    \n std::string server_ip = argv[1];
    \n uint16_t server_port = std::stoi(argv[2]);
    \n \/\/ 1. \u521b\u5efatcpsocket\u5957\u63a5\u5b57
    \n int sockfd = socket(AF_INET, SOCK_STREAM, 0);
    \n if (sockfd < 0)
    \n {
    \n std::cerr << "socket error" << std::endl;
    \n exit(2);
    \n }<\/p>\n

    \/\/ 2. \u8981\u4e0d\u8981\u8fdb\u884cbind？\u9700\u8981
    \n \/\/ \u8981\u4e0d\u8981\u663e\u793a\u7684bind\u672c\u5730IP\u548c\u7aef\u53e3？\u4e0d\u9700\u8981\u81ea\u5df1\u624b\u52a8\u663e\u793a\u7684\u8fdb\u884cbind，OS\u4f1a\u81ea\u52a8bind\u7684！
    \n \/\/ OS \u5e2e\u52a9\u6211\u4eec\u8fdb\u884c\u968f\u673a\u7aef\u53e3，\u9632\u6b62\u7aef\u53e3\u53f7\u51b2\u7a81
    \n \/\/ 2. \u5e94\u8be5\u5e72\u4ec0\u4e48？bind\u7aef\u53e3\u53f7ip，\u53d1\u8d77\u5efa\u7acb\u8fde\u63a5\u7684\u5de5\u4f5c
    \n \/\/ {client ip, client port} <-> {server ip, server port}
    \n InetAddr serveraddress(server_port, server_ip);
    \n int n = connect(sockfd, (struct sockaddr *)serveraddress.GetNetAddress(), serveraddress.Len());
    \n if (n < 0)
    \n {
    \n std::cerr << "connect to " << serveraddress.ToString() << " failed!"<< std::endl;
    \n exit(3);
    \n }
    \n std::cerr << "connect to " << serveraddress.ToString() << " success!" << std::endl;<\/p>\n

    \/\/ 3. \u901a\u4fe1
    \n while(true)
    \n {
    \n std::string line;
    \n std::cout << "please Enter# ";
    \n std::getline(std::cin, line);<\/p>\n

    write(sockfd, line.c_str(), line.size());<\/p>\n

    char inbuffer[1024];
    \n ssize_t n = read(sockfd, inbuffer, sizeof(inbuffer));
    \n if(n > 0)
    \n {
    \n inbuffer[n] = 0;
    \n std::cout << inbuffer << std::endl;
    \n }
    \n else if(n == 0)
    \n {
    \n std::cout << "read enf of file!" << std::endl;
    \n break;
    \n }
    \n else
    \n {
    \n std::cerr << "read error!" << std::endl;
    \n break;
    \n }
    \n }<\/p>\n

    return 0;
    \n} <\/p>\n

    telnet<\/h2>\n

    \u4e0b\u9762\u5411\u5927\u5bb6\u4ecb\u7ecd\u4e00\u4e2a\u5de5\u5177 telnet，telnet \u662f\u4e00\u4e2a\u7ecf\u5178\u7684 TCP \u5ba2\u6237\u7aef\u5de5\u5177，\u53ef\u4ee5\u7528\u6765\u76f4\u63a5\u548c TCP \u670d\u52a1\u7aef\u5efa\u7acb\u8fde\u63a5\u3001\u624b\u52a8\u6536\u53d1\u6570\u636e<\/span>，\u5e38\u7528\u6765\u6d4b\u8bd5\u6211\u4eec\u670d\u52a1\u5668\u662f\u5426\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n

    \u5b83\u53ef\u4ee5\u5feb\u901f\u9a8c\u8bc1\u6211\u4eec\u7684 TCP \u670d\u52a1\u7aef（\u6bd4\u5982\u6211\u4eec\u5199\u7684 8080 \u7aef\u53e3\u670d\u52a1）\u662f\u5426\u80fd\u6b63\u5e38\u63a5\u6536\u8fde\u63a5，\u8fd8\u80fd\u76f4\u63a5\u548c\u670d\u52a1\u7aef\u7684\u7aef\u53e3\u5bf9\u8bdd，\u624b\u52a8\u53d1\u9001\u6570\u636e\u3001\u770b\u670d\u52a1\u7aef\u7684\u54cd\u5e94\u3002\u76f8\u5f53\u4e8e\u4e00\u4e2a \u201c\u6781\u7b80\u7248\u7684 TCP \u5ba2\u6237\u7aef\u201d，\u4e0d\u7528\u6211\u4eec\u81ea\u5df1\u5199\u5ba2\u6237\u7aef\u4ee3\u7801\u5c31\u80fd\u6d4b\u8bd5\u670d\u52a1\u7aef\u3002<\/p>\n

    \u4e0b\u9762\u6211\u4eec\u8bd5\u9a8c\u4e00\u4e0b :<\/p>\n

    \"\" \u6211\u4eec\u76f4\u63a5\u5728\u7ec8\u7aef\u4e2d\u8f93\u5165 telnet 124.222.191.171 8080，\u5982\u679c\u8f93\u51fa Connected to 124.222.191.171. Escape character is '^]'.，\u8bf4\u660e\u8fde\u63a5\u6210\u529f，\u670d\u52a1\u7aef\u6b63\u5e38\u3002<\/p>\n

    \u6b64\u65f6\u6211\u4eec\u6309\u4e0b\u00a0ctrl + ] \u7136\u540e\u518d\u6309\u4e0b\u56de\u8f66\u540e\u624d\u80fd\u8f93\u5165\u3002\"\"\"\"\u6b64\u65f6\u6211\u4eec\u8f93\u5165\u7684\u5185\u5bb9\u4f1a\u76f4\u63a5\u53d1\u9001\u7ed9\u670d\u52a1\u7aef，\u670d\u52a1\u7aef\u7684\u56de\u663e\u4e5f\u4f1a\u76f4\u63a5\u6253\u5370\u5728\u7ec8\u7aef\u4e0a，\u548c\u81ea\u5df1\u5199\u7684\u5ba2\u6237\u7aef\u6548\u679c\u4e00\u6837\u3002<\/p>\n

    \"\"\u9000\u51fa\u65f6\u6211\u4eec\u897f\u836f\u518d\u6309 Ctrl + ]，\u518d\u8f93\u5165 quit \u5373\u53ef\u3002\"\"\u6b64\u65f6\u670d\u52a1\u7aef\u4e5f\u4f1a\u663e\u793a\u9000\u51fa\u3002<\/p>\n

    \u9700\u8981\u6ce8\u610f\u7684\u662f telnet \u672c\u8eab\u4e0d\u52a0\u5bc6，\u4f20\u8f93\u7684\u6240\u6709\u6570\u636e\u90fd\u662f\u660e\u6587\u7684，\u6240\u4ee5\u73b0\u5728\u5f88\u5c11\u7528\u6765\u767b\u5f55\u8fdc\u7a0b\u670d\u52a1\u5668，\u66f4\u591a\u662f\u7528\u6765\u4e34\u65f6\u6d4b\u8bd5 TCP \u7aef\u53e3\u548c\u670d\u52a1\u3002\u751f\u4ea7\u73af\u5883\u7684\u8fdc\u7a0b\u767b\u5f55，\u4e00\u822c\u4f1a\u7528\u66f4\u5b89\u5168\u7684 ssh \u66ff\u4ee3\u3002<\/p>\n

    netstat -natp<\/h2>\n

    \u6211\u4eec\u518d\u4ecb\u7ecd\u4e00\u4e2a\u547d\u4ee4，\u662f Linux \u91cc\u4e00\u4e2a\u975e\u5e38\u5e38\u7528\u7684\u7f51\u7edc\u8c03\u8bd5\u547d\u4ee4，\u7528\u6765\u67e5\u770b\u5f53\u524d\u7cfb\u7edf\u6240\u6709\u7684 TCP \u7f51\u7edc\u8fde\u63a5\u72b6\u6001\u3002<\/p>\n

    \"\"n \u662f\u4ee5\u6570\u5b57\u5f62\u5f0f\u663e\u793a IP \u548c\u7aef\u53e3\u3002a \u663e\u793a\u6240\u6709\u8fde\u63a5，\u5305\u62ec\u76d1\u542c\u548c\u5df2\u5efa\u7acb\u7684\u3002t \u53ea\u663e\u793a TCP \u534f\u8bae\u7684\u8fde\u63a5\u3002p \u663e\u793a\u6bcf\u4e2a\u8fde\u63a5\u5bf9\u5e94\u7684\u8fdb\u7a0b PID \u548c\u7a0b\u5e8f\u540d\u3002<\/p>\n

    \"\"\"\"\u8fd9\u4e24\u6761\u8bb0\u5f55，\u5c31\u662f\u6211\u4eec\u00a0telnet \u8fde\u63a5\u5230 server_tcp \u670d\u52a1\u7aef\u540e，\u7cfb\u7edf\u91cc\u7684\u4e00\u5bf9 TCP \u8fde\u63a5，\u5b83\u4eec\u662f\u53cc\u5411\u5bf9\u5e94\u7684：<\/p>\n<\/p>\n

    \u4e0a\u9762\u4e00\u6761 Local Address: 10.0.16.7:44682 \u662f\u6211\u4eec\u00a0telnet \u5ba2\u6237\u7aef\u7528\u672c\u5730\u7aef\u53e3 44682 \u53d1\u8d77\u8fde\u63a5，Foreign Address: 124.222.191.171:8080 \u76ee\u6807\u662f\u6211\u4eec\u7684\u670d\u52a1\u7aef\u7684 8080 \u7aef\u53e3，State: ESTABLISHED \u8868\u793a\u8fde\u63a5\u5df2\u7ecf\u6210\u529f\u5efa\u7acb\u3002<\/p>\n<\/p>\n

    \u4e0b\u9762\u4e00\u6761\u4e5f\u540c\u7406，Local Address: 10.0.16.7:8080 \u662f\u670d\u52a1\u7aef\u6b63\u5728\u76d1\u542c\u7684 8080 \u7aef\u53e3，Foreign Address: 124.222.191.171:44682 \u662f\u5bf9\u65b9\u5ba2\u6237\u7aef\u7684 IP \u548c\u4e34\u65f6\u7aef\u53e3，\u6b63\u597d\u5bf9\u5e94\u4e0a\u9762 telnet \u7684 44682，State: ESTABLISHED \u8868\u793a\u670d\u52a1\u7aef\u4e5f\u6210\u529f\u5efa\u7acb\u4e86\u8fde\u63a5\u3002<\/p>\n

    \u4e00\u4e2a TCP \u8fde\u63a5\u5728\u4e00\u53f0\u673a\u5668\u4e0a，\u4e00\u822c\u53ea\u4f1a\u663e\u793a\u4e00\u6761\u8bb0\u5f55\u3002\u800c\u6211\u4eec\u73b0\u5728\u770b\u5230\u7684\u4e24\u6761，\u662f\u56e0\u4e3a\u6211\u4eec\u7684\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\u90fd\u5728\u540c\u4e00\u53f0 Linux \u673a\u5668\u4e0a，\u8fd9\u53f0\u673a\u5668\u540c\u65f6\u62e5\u6709\u8fde\u63a5\u7684\u4e24\u4e2a\u7aef\u70b9，\u6240\u4ee5 netstat \u4f1a\u628a\u8fd9\u4e24\u4e2a\u7aef\u70b9\u7684\u8bb0\u5f55\u90fd\u5217\u51fa\u6765\u3002<\/p>\n

    \u4e94\u3001\u9636\u6bb5\u4e09: \u591a\u7ebf\u7a0b\u7248\u672c<\/h2>\n

    \u5728\u5b8c\u6210\u591a\u8fdb\u7a0b\u5e76\u53d1\u6a21\u578b\u7684\u6539\u9020\u540e，\u6211\u4eec\u8fce\u6765\u4e86\u7b2c\u4e09\u9636\u6bb5\u7684\u5347\u7ea7：\u591a\u7ebf\u7a0b\u7248\u672c\u7684 TCP \u5e76\u53d1\u670d\u52a1\u5668\u3002\u76f8\u8f83\u4e8e\u591a\u8fdb\u7a0b\u65b9\u6848，\u591a\u7ebf\u7a0b\u6a21\u578b\u4ee5\u66f4\u4f4e\u7684\u7cfb\u7edf\u5f00\u9500\u3001\u66f4\u7b80\u5355\u7684\u901a\u4fe1\u65b9\u5f0f，\u5b9e\u73b0\u4e86\u76f8\u540c\u7684\u5e76\u53d1\u80fd\u529b\u3002\u4e3b\u7ebf\u7a0b\u4e13\u6ce8 accept \u63a5\u6536\u65b0\u8fde\u63a5，\u6bcf\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u7531\u72ec\u7acb\u7684\u5b50\u7ebf\u7a0b\u5904\u7406，\u65e2\u907f\u514d\u4e86\u8fdb\u7a0b\u521b\u5efa\u7684\u9ad8\u6210\u672c，\u4e5f\u89e3\u51b3\u4e86\u8fdb\u7a0b\u95f4\u901a\u4fe1\u590d\u6742\u7684\u95ee\u9898，\u662f Linux \u4e0b\u66f4\u8f7b\u91cf\u3001\u66f4\u9ad8\u6548\u7684\u5e76\u53d1\u5b9e\u73b0\u65b9\u5f0f\u3002<\/p>\n

    \u591a\u7ebf\u7a0b vs \u591a\u8fdb\u7a0b\u7684\u5fc3\u5dee\u5f02<\/p>\n

    \"\"<\/p>\n

    \u903b\u8f91\u68b3\u7406:<\/h3>\n

    \u5176\u5b9e\u591a\u7ebf\u7a0b\u7684\u5e76\u53d1\u601d\u8def\u548c\u591a\u8fdb\u7a0b\u7684\u4e00\u6837，\u4e3b\u7ebf\u7a0b\u53ea\u5728 while(true) \u5faa\u73af\u91cc\u8c03\u7528 accept()，\u6536\u5230\u65b0\u8fde\u63a5\u540e，\u7acb\u523b\u521b\u5efa\u4e00\u4e2a\u5b50\u7ebf\u7a0b\u5904\u7406\u8fd9\u4e2a\u8fde\u63a5，\u7136\u540e\u9a6c\u4e0a\u56de\u5230\u5faa\u73af\u7ee7\u7eed\u7b49\u5f85\u4e0b\u4e00\u4e2a\u5ba2\u6237\u7aef\u3002\u5b50\u7ebf\u7a0b\u6bcf\u4e2a\u8fde\u63a5\u5bf9\u5e94\u4e00\u4e2a\u72ec\u7acb\u7ebf\u7a0b，\u7ebf\u7a0b\u5165\u53e3\u51fd\u6570 thread_routine \u4f1a\u8c03\u7528 serviceIO \u5904\u7406\u5ba2\u6237\u7aef\u7684\u8bfb\u5199\u4ea4\u4e92，\u7ebf\u7a0b\u7ed3\u675f\u524d\u4f1a\u81ea\u52a8\u5173\u95ed\u901a\u4fe1\u5957\u63a5\u5b57\u5e76\u91ca\u653e\u8d44\u6e90\u3002<\/p>\n

    1. \u9996\u5148，\u6211\u4eec\u7684\u76ee\u6807\u662f\u5b9e\u73b0\u4e00\u4e2a\u591a\u7ebf\u7a0b\u7248\u672c\u7684 TCP \u670d\u52a1\u5668，\u4e3b\u7ebf\u7a0b\u8d1f\u8d23 accept \u63a5\u6536\u8fde\u63a5，\u6bcf\u6765\u4e00\u4e2a\u5ba2\u6237\u7aef\u5c31\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\u4e13\u95e8\u5904\u7406\u5b83\u7684 IO，\u6240\u4ee5\u5f53\u4e3b\u7ebf\u7a0b\u8c03\u7528 pthread_create \u521b\u5efa\u7ebf\u7a0b\u65f6，\u5fc5\u987b\u7ed9\u5b83\u4e00\u4e2a\u7b26\u5408\u683c\u5f0f\u8981\u6c42\u7684\u7ebf\u7a0b\u5165\u53e3\u51fd\u6570 thread_routine()，\u4e5f\u5c31\u662f\u5fc5\u987b\u662f\u8fd4\u56de\u503c\u4e3a void*\u3001\u53c2\u6570\u4e3a void\u7684\u51fd\u6570\u3002\"\"<\/p>\n

    2. \u800c\u5728 C++ \u91cc，\u666e\u901a\u7684\u6210\u5458\u51fd\u6570\u662f\u4e0d\u80fd\u76f4\u63a5\u4f5c\u4e3a\u7ebf\u7a0b\u5165\u53e3\u7684，\u56e0\u4e3a\u5b83\u5728\u5e95\u5c42\u4f1a\u88ab\u7f16\u8bd1\u5668\u81ea\u52a8\u52a0\u4e0a\u4e00\u4e2a\u9690\u85cf\u7684 this \u6307\u9488\u53c2\u6570，\u7528\u6765\u6307\u5411\u5f53\u524d\u5bf9\u8c61，\u8fd9\u6837\u4e00\u6765，\u666e\u901a\u6210\u5458\u51fd\u6570\u7684\u7b7e\u540d\u5c31\u53d8\u6210\u4e86 void thread_routine (TcpServer* this, void* args)，\u548c pthread_create \u8981\u6c42\u7684\u683c\u5f0f\u4e0d\u5339\u914d，\u6240\u4ee5\u5fc5\u987b\u628a thread_routine \u58f0\u660e\u4e3a\u9759\u6001\u6210\u5458\u51fd\u6570，\u9759\u6001\u6210\u5458\u51fd\u6570\u4e0d\u4f9d\u8d56\u4e8e\u4efb\u4f55\u5bf9\u8c61，\u6ca1\u6709\u9690\u85cf\u7684 this \u6307\u9488，\u5b83\u7684\u7b7e\u540d\u81ea\u7136\u5c31\u662f void* thread_routine (void* args)，\u521a\u597d\u7b26\u5408 pthread_create \u7684\u8981\u6c42\u3002<\/p>\n

    3. \u4f46\u95ee\u9898\u662f，\u9759\u6001\u6210\u5458\u51fd\u6570\u4e0d\u80fd\u76f4\u63a5\u8c03\u7528\u975e\u9759\u6001\u7684\u6210\u5458\u51fd\u6570<\/span>，\u6bd4\u5982\u6211\u4eec\u7684 serviceIO \u51fd\u6570，\u800c serviceIO \u5c31\u662f TcpServer \u7c7b\u7684\u6210\u5458\u51fd\u6570，\u9759\u6001\u6210\u5458\u51fd\u6570\u8981\u8c03\u7528\u5fc5\u987b\u901a\u8fc7\u7c7b\u5bf9\u8c61\u6216\u7c7b\u5bf9\u8c61\u7684\u6307\u9488\u6765\u8c03\u7528，\u6240\u4ee5\u6211\u4eec\u9700\u8981\u628a\u5f53\u524d TcpServer \u5bf9\u8c61\u7684\u5730\u5740，\u4e5f\u5c31\u662f EchoTcpServerMain.cc \u6587\u4ef6\u91cc\u7684\u5b9a\u4e49\u51fa\u6765\u7684\u00a0TcpServer \u7c7b\u5bf9\u8c61\u7684 this \u6307\u9488，\u4f20\u9012\u7ed9\u9759\u6001\u7ebf\u7a0b\u51fd\u6570\u3002<\/p>\n

    4. \u53ef pthread_create \u53c8\u53ea\u80fd\u4f20\u4e00\u4e2a void \u7c7b\u578b\u7684\u53c2\u6570\u7ed9 thread_routine \u7ebf\u7a0b\u5165\u53e3\u51fd\u6570，\u800c\u6211\u4eec\u4e0d\u4ec5\u8981\u4f20 this\u6307\u9488，\u8fd8\u8981\u4f20\u5ba2\u6237\u7aef\u7684\u901a\u4fe1\u5957\u63a5\u5b57 sockfd \u548c\u5ba2\u6237\u7aef\u5730\u5740\u4fe1\u606f，\u6240\u4ee5\u5c31\u9700\u8981\u4e00\u4e2a\u5bb9\u5668\u628a\u8fd9\u4e09\u6837\u4e1c\u897f\u6253\u5305\u8d77\u6765，\u56e0\u6b64\u6211\u4eec\u5728 TcpServer \u7c7b\u91cc\u9762\u53c8\u5199\u4e86\u4e2a\u5185\u90e8\u7c7b\u00a0ThreadData，\u5b83\u5c31\u50cf\u4e00\u4e2a\u5feb\u9012\u76d2，\u628a\u4e3b\u7ebf\u7a0b\u91cc\u7684 this\u6307\u9488\u3001sockfd \u548c clientaddress \u5168\u90e8\u88c5\u8fdb\u53bb，\u4e3b\u7ebf\u7a0b accept \u5230\u8fde\u63a5\u540e，new \u4e00\u4e2a ThreadData \u5bf9\u8c61，\u628a\u8fd9\u4e09\u4e2a\u53c2\u6570\u90fd\u4f20\u8fdb\u53bb，\u7136\u540e\u628a\u8fd9\u4e2a\u5bf9\u8c61\u7684\u5730\u5740\u4f5c\u4e3a void \u53c2\u6570\u4f20\u7ed9 pthread_create，\u5728\u7ebf\u7a0b\u5165\u53e3\u51fd\u6570 thread_routine \u91cc，\u6211\u4eec\u518d\u628a\u4f20\u8fdb\u6765\u7684 void \u53c2\u6570\u5f3a\u8f6c\u56de ThreadData \u7c7b\u578b，\u5c31\u80fd\u62ff\u5230\u91cc\u9762\u5b58\u597d\u7684 this \u6307\u9488\u3001sockfd \u548c\u5730\u5740，\u518d\u901a\u8fc7 this \u6307\u9488\u8c03\u7528 serviceIO \u6210\u5458\u51fd\u6570，\u8fd9\u6837\u65e2\u6ee1\u8db3\u4e86 pthread_create \u5bf9\u5165\u53e3\u51fd\u6570\u683c\u5f0f\u7684\u8981\u6c42，\u53c8\u80fd\u8ba9\u9759\u6001\u51fd\u6570\u6210\u529f\u8c03\u7528\u975e\u9759\u6001\u7684\u6210\u5458\u51fd\u6570，\u540c\u65f6\u8fd8\u80fd\u628a\u7ebf\u7a0b\u9700\u8981\u7684\u6240\u6709\u53c2\u6570\u4e00\u6b21\u6027\u4f20\u9012\u8fc7\u53bb，\u800c ThreadData \u7684\u6790\u6784\u51fd\u6570\u91cc\u8fd8\u5199\u4e86 close (_sockfd)，\u5728\u7ebf\u7a0b\u51fd\u6570\u6267\u884c\u5b8c delete td \u65f6，\u4f1a\u81ea\u52a8\u5173\u95ed\u901a\u4fe1\u5957\u63a5\u5b57，\u907f\u514d\u8d44\u6e90\u6cc4\u6f0f\u3002\u53ef\u8c13\u5341\u5206\u4f18\u96c5!<\/p>\n

    5. \u6574\u4e2a\u6d41\u7a0b\u91cc，\u4e3b\u7ebf\u7a0b\u53ea\u8d1f\u8d23\u521b\u5efa\u7ebf\u7a0b，\u7ebf\u7a0b\u51fd\u6570\u62ff\u5230\u6253\u5305\u597d\u7684\u53c2\u6570\u540e，\u5c31\u80fd\u72ec\u7acb\u5904\u7406\u5ba2\u6237\u7aef\u7684\u8bfb\u5199，\u548c\u4e3b\u7ebf\u7a0b\u4e92\u4e0d\u5e72\u6270，\u5b9e\u73b0\u4e86\u5e76\u53d1\u7684\u6548\u679c\u3002\u53ef\u8c13\u5341\u5206\u4f18\u96c5!<\/p>\n

    6. \u6539\u8fdb\u7684\u7ebf\u7a0b\u4ee3\u7801\u5982\u4e0b:<\/p>\n

    \"\"<\/p>\n

    \"\"<\/p>\n

    7. \u6211\u4eec\u53ea\u9700\u8981\u5728 Start() \u51fd\u6570\u91cc\u65b0\u589e\u7ea2\u6846\u91cc\u8fd9\u51e0\u884c\u4ee3\u7801，\u518d\u914d\u5408\u4e0a\u9762\u7684 ThreadData \u5185\u90e8\u7c7b\u548c thread_routine \u9759\u6001\u51fd\u6570，\u5c31\u5b8c\u6210\u4e86\u591a\u7ebf\u7a0b\u7248\u672c\u7684\u6539\u9020，\u5176\u4ed6\u5730\u65b9\u7684\u4ee3\u7801\u90fd\u4e0d\u7528\u52a8\u3002<\/p>\n

    \u8fd0\u884c\u7ed3\u679c :<\/h3>\n

    \"\"<\/p>\n

    \"\"<\/p>\n

    \"\" \u5728\u591a\u7ebf\u7a0b\u7248\u672c\u91cc，\u4e3b\u7ebf\u7a0b accept \u62ff\u5230 sockfd=4 \u540e，\u4f1a\u6253\u5305\u4ea4\u7ed9\u00a0ThreadData \u4f20\u7ed9\u5b50\u7ebf\u7a0b，\u4e3b\u7ebf\u7a0b\u6ca1\u6709\u5173\u95ed\u5b83，\u4e3b\u7ebf\u7a0b\u9a6c\u4e0a\u56de\u5230\u5faa\u73af，\u518d\u6b21 accept，\u5185\u6838\u5206\u914d\u4e0b\u4e00\u4e2a\u53ef\u7528\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26，\u4e5f\u5c31\u662f 5 \u6240\u4ee5\u65e5\u5fd7\u91cc\u4f1a\u51fa\u73b0 4 \u548c 5，\u5b83\u4eec\u5206\u522b\u5bf9\u5e94\u4e24\u4e2a\u4e0d\u540c\u7684\u5ba2\u6237\u7aef\u8fde\u63a5，\u5404\u81ea\u88ab\u5bf9\u5e94\u7684\u5b50\u7ebf\u7a0b\u6301\u6709，\u4e3b\u7ebf\u7a0b\u8fd9\u8fb9\u7684\u5f15\u7528\u6ca1\u6709\u88ab\u5173\u95ed，\u5185\u6838\u5c31\u4e0d\u4f1a\u56de\u6536\u8fd9\u4e9b fd \u7f16\u53f7，\u53ea\u80fd\u6309\u987a\u5e8f\u9012\u589e\u5206\u914d\u3002<\/p>\n

    \u800c\u5728\u524d\u9762\u7684\u591a\u8fdb\u7a0b\u7248\u672c\u4e2d，\u4e3b\u7ebf\u7a0b accept \u62ff\u5230 sockfd=4 \u540e，\u4f1a\u7acb\u523b\u6267\u884c close(sockfd)，\u628a\u8fd9\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u5173\u95ed\u3002\u8fd9\u6837，4 \u53f7 fd \u5c31\u56de\u5230\u4e86\u7a7a\u95f2\u72b6\u6001，\u4e0b\u4e00\u6b21 accept \u5c31\u4f1a\u518d\u6b21\u62ff\u5230 4，\u6240\u4ee5\u65e5\u5fd7\u91cc\u4e00\u76f4\u662f 4\u3002<\/p>\n

    \u53c8\u56e0\u4e3a\u5728 ThreadData \u7c7b\u7684\u6790\u6784\u51fd\u6570\u91cc\u5199\u4e86 close(_sockfd); \u6240\u4ee5\u5b50\u7ebf\u7a0b\u6267\u884c\u5b8c serviceIO() \u540e，\u4f1a delete td，\u89e6\u53d1\u6790\u6784\u51fd\u6570，\u81ea\u52a8\u5173\u95ed sockfd，\u5185\u6838\u4e5f\u4f1a\u81ea\u52a8\u56de\u6536\u7ebf\u7a0b\u6301\u6709\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002<\/p>\n

    \"\"\u6d88\u606f\u6536\u53d1\u6210\u529f!<\/p>\n

    \u4ee3\u7801:<\/h3>\n

    EchoTcpServer.hpp :<\/p>\n

    #pragma once<\/p>\n

    #include <iostream>
    \n#include <string>
    \n#include <cstring>
    \n#include <unistd.h>
    \n#include <sys\/socket.h>
    \n#include <arpa\/inet.h>
    \n#include <netinet\/in.h>
    \n#include <sys\/wait.h>
    \n#include "Thread.hpp"
    \n#include "InetAddr.hpp"
    \n#include "Logger.hpp"<\/p>\n

    using namespace NS_LOG_MODULE;<\/p>\n

    enum
    \n{
    \n SUCCESS = 0,
    \n USAGE_ERR,
    \n SOCKET_ERR,
    \n BIND_ERR,
    \n LISTEN_ERR,
    \n FORK_ERR
    \n};<\/p>\n

    static const int gbacklog = 16;
    \nstatic const uint16_t gport = 8888;<\/p>\n

    class TcpServer
    \n{
    \npublic:
    \n TcpServer(uint16_t port = gport) : _port(port)
    \n {
    \n }
    \n void InitServer()
    \n {
    \n \/\/ 1. \u521b\u5efasocket
    \n _listensockfd = socket(AF_INET, SOCK_STREAM, 0); \/\/ TCP
    \n if (_listensockfd < 0)
    \n {
    \n LOG(LogLevel::FATAL) << "create socket error";
    \n exit(SOCKET_ERR);
    \n }
    \n LOG(LogLevel::DEBUG) << "create socket success: " << _listensockfd;
    \n \/\/ 2. \u586b\u5145\u672c\u5730socket\u4fe1\u606f
    \n struct sockaddr_in local;
    \n memset(&local, 0, sizeof(local));
    \n local.sin_family = AF_INET;
    \n local.sin_port = htons(_port);
    \n local.sin_addr.s_addr = INADDR_ANY; \/\/ \u4efb\u610f\u5730\u5740bind<\/p>\n

    \/\/ 3. bind
    \n int n = bind(_listensockfd, (struct sockaddr *)&local, sizeof(local));
    \n if (n < 0)
    \n {
    \n LOG(LogLevel::FATAL) << "bind error";
    \n exit(BIND_ERR);
    \n }
    \n LOG(LogLevel::DEBUG) << "bind socket success";<\/p>\n

    \/\/ 4. tcp\u662f\u9762\u5411\u8fde\u63a5\u7684，\u6240\u4ee5，TCP\u670d\u52a1\u5668\u8981\u5904\u4e8e\u4e00\u79cd\u53eb\u505alisten，\u76d1\u542c\u72b6\u6001\u3002
    \n n = listen(_listensockfd, gbacklog);
    \n if (n < 0)
    \n {
    \n LOG(LogLevel::FATAL) << "listen error";
    \n exit(LISTEN_ERR);
    \n }
    \n LOG(LogLevel::DEBUG) << "listen socket success";
    \n }
    \n void serviceIO(int sockfd, InetAddr address)
    \n {
    \n \/\/ tcp sockfd, \u5168\u53cc\u5de5
    \n \/\/ \u957f\u670d\u52a1，\u957f\u8fde\u63a5
    \n LOG(LogLevel::DEBUG) << "clinet info is : " << address.ToString();
    \n while (true)
    \n {
    \n char inbuffer[1024] = {0};
    \n \/\/ \u8bfb
    \n ssize_t n = read(sockfd, inbuffer, sizeof(inbuffer) – 1);
    \n if (n > 0)
    \n {
    \n inbuffer[n] = 0;
    \n LOG(LogLevel::INFO) << address.ToString() << " say# " << inbuffer;<\/p>\n

    \/\/ \u5199
    \n std::string echo_string = "server echo# ";
    \n echo_string += inbuffer;<\/p>\n

    write(sockfd, echo_string.c_str(), echo_string.size());
    \n }
    \n else if (n == 0)
    \n {
    \n LOG(LogLevel::INFO) << "client quit, address: " << address.ToString();
    \n break;
    \n }
    \n else
    \n {
    \n LOG(LogLevel::ERROR) << "client read error, address: " << address.ToString();
    \n break;
    \n }
    \n }
    \n }
    \n class ThreadData \/\/\u5185\u90e8\u7c7b
    \n {
    \n public:
    \n ThreadData(TcpServer *ts, int sockfd, const InetAddr &addr)
    \n : _this(ts), _sockfd(sockfd), _addr(addr)
    \n {
    \n }
    \n ~ThreadData()
    \n {
    \n close(_sockfd);
    \n }<\/p>\n

    public:
    \n TcpServer *_this;
    \n int _sockfd;
    \n InetAddr _addr;
    \n };<\/p>\n

    static void *thread_routine(void *args)
    \n {
    \n ThreadData *td = static_cast<ThreadData *>(args);
    \n pthread_detach(pthread_self());
    \n td->_this->serviceIO(td->_sockfd, td->_addr);
    \n delete td;
    \n return nullptr;
    \n }<\/p>\n

    void Start()
    \n {
    \n while (true)
    \n {
    \n struct sockaddr_in clientaddr;
    \n socklen_t len = sizeof(clientaddr);
    \n \/\/ 5. \u83b7\u53d6\u8fde\u63a5
    \n int sockfd = accept(_listensockfd, (struct sockaddr *)&clientaddr, &len);
    \n if (sockfd < 0)
    \n {
    \n LOG(LogLevel::WARNING) << "accept errr!";
    \n continue;
    \n }
    \n LOG(LogLevel::DEBUG) << "accept success, sockfd: " << sockfd;
    \n \/\/ version 3: \u591a\u7ebf\u7a0b\u7248\u672c
    \n pthread_t tid;
    \n InetAddr clientaddress(clientaddr);
    \n ThreadData *td = new ThreadData(this, sockfd, clientaddress);
    \n pthread_create(&tid, nullptr, thread_routine, (void *)td);
    \n }
    \n }
    \n ~TcpServer()
    \n {
    \n close(_listensockfd);
    \n }<\/p>\n

    private:
    \n uint16_t _port;
    \n \/\/ \u4e0d\u9700\u8981\u663e\u793a\u5305\u542bip
    \n int _listensockfd;
    \n};<\/p>\n

    \u56e0\u4e3a EchoTcpServerMain.cc \u548c EchoTcpClient.cc \u6587\u4ef6\u91cc\u7684\u4ee3\u7801\u90fd\u6ca1\u6709\u6539\u52a8，\u8fd9\u91cc\u5c31\u4e0d\u8d34\u4e86\u3002\u00a0<\/p>\n

    \u516d\u3001\u9636\u6bb5\u56db: \u7ebf\u7a0b\u6c60\u7248\u672c<\/h2>\n

    \u5728\u524d\u9762\u7684\u7248\u672c\u4e2d，\u6211\u4eec\u5b9e\u73b0\u4e86 \u201c\u4e3b\u7ebf\u7a0b\u6bcf accept \u6210\u529f\u5c31\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\u6267\u884c IO\u201d \u7684\u591a\u7ebf\u7a0b TCP \u670d\u52a1\u5668，\u89e3\u51b3\u4e86\u5355\u8fdb\u7a0b\u963b\u585e\u548c\u591a\u8fdb\u7a0b\u5f00\u9500\u5927\u7684\u95ee\u9898\u3002\u4f46\u968f\u7740\u5e76\u53d1\u91cf\u7684\u63d0\u5347，\u201c\u6765\u4e00\u4e2a\u8fde\u63a5\u5c31\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\u201d \u7684\u6a21\u5f0f，\u4e5f\u4f1a\u66b4\u9732\u51fa\u4e86\u4e24\u4e2a\u6838\u5fc3\u7f3a\u9677：<\/p>\n

    1. \u9891\u7e41\u521b\u5efa \/ \u9500\u6bc1\u7ebf\u7a0b\u7684\u7cfb\u7edf\u5f00\u9500\u5927，\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\u6027\u80fd\u635f\u8017\u660e\u663e<\/p>\n

    2. \u7ebf\u7a0b\u6570\u91cf\u968f\u5ba2\u6237\u7aef\u6570\u65e0\u9650\u5236\u589e\u957f，\u53ef\u80fd\u8017\u5c3d\u7cfb\u7edf\u8d44\u6e90，\u5f15\u53d1\u670d\u52a1\u5d29\u6e83<\/p>\n

    \u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e9b\u95ee\u9898，\u6211\u4eec\u5f15\u5165\u4e86\u7ebf\u7a0b\u6c60\u6a21\u578b，\u8fd9\u4e5f\u662f\u751f\u4ea7\u73af\u5883\u4e2d\u670d\u52a1\u5668\u5e76\u53d1\u6a21\u578b\u7684\u4e3b\u6d41\u5b9e\u73b0\u3002<\/p>\n

    \u903b\u8f91\u68b3\u7406:<\/h3>\n

    \u5f15\u5165\u7ebf\u7a0b\u6c60\u4e4b\u540e，\u6574\u4e2a\u670d\u52a1\u7684\u5e76\u53d1\u6a21\u578b\u53d8\u6210\u4e86\u300c\u4e3b\u7ebf\u7a0b + \u56fa\u5b9a\u6570\u91cf\u5de5\u4f5c\u7ebf\u7a0b\u300d\u7684\u534f\u4f5c\u6a21\u5f0f，\u670d\u52a1\u542f\u52a8\u65f6，\u6211\u4eec\u5148\u521b\u5efa\u7ebf\u7a0b\u6c60\u7684\u5355\u4f8b\u5b9e\u4f8b，\u5b83\u4f1a\u4e00\u6b21\u6027\u521b\u5efa\u597d\u9884\u8bbe\u6570\u91cf\u7684\u5de5\u4f5c\u7ebf\u7a0b，\u8fd9\u4e9b\u7ebf\u7a0b\u4e00\u521b\u5efa\u5c31\u4f1a\u8fdb\u5165\u963b\u585e\u72b6\u6001，\u7b49\u5f85\u4efb\u52a1\u961f\u5217\u91cc\u6709\u65b0\u4efb\u52a1\u5230\u6765\u3002<\/p>\n

    \u4e3b\u7ebf\u7a0b\u5219\u5728 while(true) \u5faa\u73af\u91cc，\u53ea\u8d1f\u8d23\u4e00\u4ef6\u4e8b：\u8c03\u7528 accept() \u63a5\u6536\u5ba2\u6237\u7aef\u8fde\u63a5\u3002\u4e00\u65e6\u6536\u5230\u65b0\u8fde\u63a5，\u4e3b\u7ebf\u7a0b\u4f1a\u628a\u5904\u7406\u8fd9\u4e2a\u5ba2\u6237\u7aef IO\u7684\u903b\u8f91\u5c01\u88c5\u6210\u4e00\u4e2a\u4efb\u52a1，\u8c03\u7528 Enqueue() \u63d0\u4ea4\u5230\u7ebf\u7a0b\u6c60\u7684\u4efb\u52a1\u961f\u5217\u91cc\u3002\u63d0\u4ea4\u4efb\u52a1\u7684\u64cd\u4f5c\u662f\u975e\u963b\u585e\u7684，\u4e3b\u7ebf\u7a0b\u4e0d\u4f1a\u7b49\u4efb\u52a1\u6267\u884c\u5b8c，\u800c\u662f\u7acb\u523b\u56de\u5230\u5faa\u73af\u5f00\u5934，\u7ee7\u7eed\u4e0b\u4e00\u6b21 accept()\u3002<\/p>\n

    \u7ebf\u7a0b\u6c60\u5185\u90e8，\u5de5\u4f5c\u7ebf\u7a0b\u4f1a\u6301\u7eed\u4ece\u4efb\u52a1\u961f\u5217\u91cc\u53d6\u4efb\u52a1：\u961f\u5217\u91cc\u6709\u4efb\u52a1\u65f6，\u5c31\u53d6\u51fa\u5e76\u6267\u884c serviceIO \u5904\u7406\u5ba2\u6237\u7aef\u8bfb\u5199；\u961f\u5217\u4e3a\u7a7a\u65f6，\u5c31\u963b\u585e\u7b49\u5f85，\u4e0d\u6d88\u8017 CPU \u8d44\u6e90\u3002\u8fd9\u6837\u4e00\u6765，\u6240\u6709\u5ba2\u6237\u7aef\u8fde\u63a5\u7684 IO \u5904\u7406，\u90fd\u7531\u7ebf\u7a0b\u6c60\u91cc\u7684\u56fa\u5b9a\u7ebf\u7a0b\u590d\u7528\u6267\u884c，\u4e3b\u7ebf\u7a0b\u53ea\u4e13\u6ce8\u63a5\u6536\u8fde\u63a5，\u4e24\u8005\u4e92\u4e0d\u963b\u585e\u3002<\/p>\n

    \u548c\u4e4b\u524d \u201c\u6bcf\u8fde\u63a5\u5c31\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\u201d \u7684\u6a21\u5f0f\u76f8\u6bd4，\u8fd9\u79cd\u65b9\u5f0f\u65e2\u907f\u514d\u4e86\u9891\u7e41\u521b\u5efa\u9500\u6bc1\u7ebf\u7a0b\u7684\u5f00\u9500，\u53c8\u901a\u8fc7\u7ebf\u7a0b\u6c60\u5927\u5c0f\u9650\u5236\u4e86\u6700\u5927\u5e76\u53d1\u6570，\u4e0d\u4f1a\u56e0\u4e3a\u5ba2\u6237\u7aef\u66b4\u589e\u800c\u8017\u5c3d\u7cfb\u7edf\u8d44\u6e90，\u662f\u670d\u52a1\u5668\u5f00\u53d1\u4e2d\u66f4\u7a33\u5b9a\u3001\u66f4\u9ad8\u6548\u7684\u5e76\u53d1\u65b9\u6848\u3002<\/p>\n

    \u6539\u52a8\u7684\u5730\u65b9:<\/h3>\n

    \"\"\"\"\u8fd9\u4e00\u6b65\u662f\u5f15\u5165\u6211\u4eec\u5c01\u88c5\u597d\u7684\u7ebf\u7a0b\u6c60\u6a21\u5757，\u5b83\u63d0\u4f9b\u4e86\u4efb\u52a1\u961f\u5217\u3001\u7ebf\u7a0b\u590d\u7528\u548c\u5e76\u53d1\u63a7\u5236\u7684\u6838\u5fc3\u80fd\u529b，\u662f\u6574\u4e2a\u4f18\u5316\u7684\u57fa\u7840\u3002<\/p>\n

    \"\"<\/p>\n

    \"\"1. \u6211\u4eec\u5148\u7528 using task_t = std::function<void()>，\u7edf\u4e00\u89c4\u5b9a\u4e86\u4efb\u52a1\u6807\u51c6：\u5fc5\u987b\u662f\u65e0\u53c2\u3001\u65e0\u8fd4\u56de\u503c\u7684\u53ef\u8c03\u7528\u5bf9\u8c61\u3002Lambda \u8868\u8fbe\u5f0f\u867d\u7136\u5185\u90e8\u8981\u4f7f\u7528\u00a0TcpServer \u5bf9\u8c61\u7684 this \u6307\u9488，\u5ba2\u6237\u7aef\u901a\u4fe1\u5957\u63a5\u5b57(sockfd）\u548c\u5ba2\u6237\u7aef\u5730\u5740\u4fe1\u606f（clientaddress）\u7b49\u53d8\u91cf，\u4f46\u8fd9\u4e9b\u6570\u636e\u90fd\u662f\u901a\u8fc7\u6355\u83b7\u5217\u8868\u63d0\u524d\u4fdd\u5b58\u7684，\u4e0d\u5c5e\u4e8e\u51fd\u6570\u8c03\u7528\u65f6\u9700\u8981\u4f20\u9012\u7684\u5f62\u53c2，Lambda \u81ea\u8eab\u7684\u6267\u884c\u62ec\u53f7\u4e3a\u7a7a\u3001\u4e5f\u6ca1\u6709\u8fd4\u56de\u503c，\u5bf9\u5916\u5b8c\u5168\u7b26\u5408\u65e0\u53c2\u65e0\u8fd4\u56de\u503c\u7684\u683c\u5f0f，\u6b63\u597d\u548c std::function<void()> \u5b8c\u7f8e\u5339\u914d\u3002\u6700\u7ec8\u6574\u4e2a Lambda \u4f1a\u88ab\u9690\u5f0f\u8f6c\u4e3a task_t \u4efb\u52a1\u7c7b\u578b，\u6211\u4eec\u5c31\u53ef\u4ee5\u628a\u5305\u542b\u4e1a\u52a1\u903b\u8f91\u548c\u6240\u9700\u5168\u90e8\u6570\u636e\u7684 Lambda，\u76f4\u63a5\u5c01\u88c5\u6210\u4e00\u4e2a\u6807\u51c6\u4efb\u52a1，\u6295\u9012\u5230\u7ebf\u7a0b\u6c60\u7684\u4efb\u52a1\u961f\u5217\u4e2d，\u8ba9\u7ebf\u7a0b\u6c60\u7684\u5de5\u4f5c\u7ebf\u7a0b\u81ea\u52a8\u8c03\u5ea6\u6267\u884c\u3002\u4e3b\u7ebf\u7a0b\u5b8c\u5168\u4e0d\u7528\u7ba1\u4efb\u52a1\u600e\u4e48\u8dd1，\u53ea\u8d1f\u8d23\u4e0d\u505c accept \u63a5\u6536\u65b0\u8fde\u63a5\u3001\u6301\u7eed\u5f80\u7ebf\u7a0b\u6c60\u629b\u4efb\u52a1\u5c31\u884c\u3002<\/p>\n

    2. \u7ebf\u7a0b\u6c60\u672c\u8eab\u662f\u4e00\u4e2a\u91cd\u91cf\u7ea7\u5bf9\u8c61，\u63d0\u524d\u521b\u5efa\u56fa\u5b9a\u6570\u91cf\u7684\u5de5\u4f5c\u7ebf\u7a0b，\u662f\u4e3a\u4e86\u907f\u514d\u9891\u7e41\u521b\u5efa \/ \u9500\u6bc1\u7ebf\u7a0b\u7684\u5f00\u9500\u3002\u5982\u679c\u4e3b\u7ebf\u7a0b\u5728 while(true) \u5faa\u73af\u91cc\u6bcf\u6b21 accept \u5230\u65b0\u8fde\u63a5\u65f6，\u90fd\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u7ebf\u7a0b\u6c60，\u4f1a\u5bfc\u81f4\u7ebf\u7a0b\u6c60\u5b9e\u4f8b\u65e0\u9650\u589e\u591a，\u5b8c\u5168\u5931\u53bb\u590d\u7528\u7ebf\u7a0b\u7684\u610f\u4e49，\u751a\u81f3\u76f4\u63a5\u8017\u5c3d\u7cfb\u7edf\u8d44\u6e90\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898，\u6211\u4eec\u628a\u7ebf\u7a0b\u6c60\u8bbe\u8ba1\u6210\u5355\u4f8b\u6a21\u5f0f<\/span>：\u7a0b\u5e8f\u8fd0\u884c\u671f\u95f4，\u5168\u5c40\u53ea\u80fd\u6709\u4e00\u4e2a\u7ebf\u7a0b\u6c60\u5b9e\u4f8b；\u7b2c\u4e00\u6b21\u8c03\u7528 ThreadPool<task_t>::Instance() \u65f6，\u624d\u4f1a\u771f\u6b63\u521b\u5efa\u7ebf\u7a0b\u6c60，\u5e76\u521d\u59cb\u5316\u6240\u6709\u5de5\u4f5c\u7ebf\u7a0b；\u540e\u7eed\u6bcf\u6b21\u8c03\u7528 Instance()，\u90fd\u4f1a\u76f4\u63a5\u8fd4\u56de\u8fd9\u4e2a\u5df2\u7ecf\u521b\u5efa\u597d\u7684\u7ebf\u7a0b\u6c60\u5bf9\u8c61，\u4e0d\u518d\u91cd\u590d\u521b\u5efa\u3002\u8fd9\u6837\u4e00\u6765，\u4e3b\u7ebf\u7a0b\u5728 while(true) \u5faa\u73af\u91cc，\u867d\u7136\u6bcf\u6b21\u90fd\u4f1a\u6267\u884c ThreadPool<task_t>::Instance()->Enqueue(…) \u8fd9\u884c\u4ee3\u7801，\u4f46\u672c\u8d28\u4e0a\u53ea\u662f\u5f80\u540c\u4e00\u4e2a\u7ebf\u7a0b\u6c60\u7684\u4efb\u52a1\u961f\u5217\u91cc，\u4e0d\u65ad\u63d0\u4ea4\u65b0\u7684\u5ba2\u6237\u7aef\u5904\u7406\u4efb\u52a1\u3002\u7ebf\u7a0b\u6c60\u5185\u90e8\u7684\u5de5\u4f5c\u7ebf\u7a0b\u4f1a\u81ea\u52a8\u4ece\u961f\u5217\u4e2d\u53d6\u51fa\u4efb\u52a1\u5e76\u6267\u884c，\u65e2\u4fdd\u8bc1\u4e86\u7ebf\u7a0b\u6c60\u53ea\u521b\u5efa\u4e00\u6b21\u3001\u7ebf\u7a0b\u590d\u7528，\u53c8\u4e0d\u5f71\u54cd\u4e3b\u7ebf\u7a0b\u7ee7\u7eed\u63a5\u6536\u65b0\u8fde\u63a5，\u5b9e\u73b0\u4e86\u9ad8\u6548\u3001\u53ef\u63a7\u7684\u5e76\u53d1\u5904\u7406\u3002<\/p>\n

    \u8fd0\u884c\u7ed3\u679c:<\/h3>\n

    \"\"<\/p>\n

    \"\"<\/p>\n

    \"\"\u4e24\u4e2a\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u90fd\u88ab\u4e3b\u7ebf\u7a0b\u6210\u529f\u63a5\u6536\u3002\u7ebf\u7a0b\u6c60\u5355\u4f8b\u88ab\u6210\u529f\u521b\u5efa\u3002\u7ebf\u7a0b\u6c60\u91cc\u7684\u4e24\u4e2a\u5de5\u4f5c\u7ebf\u7a0b\u5df2\u7ecf\u542f\u52a8，\u6b63\u5904\u4e8e\u7b49\u5f85\u4efb\u52a1\u7684\u72b6\u6001\u3002<\/p>\n

    \"\"\u6d88\u606f\u6536\u53d1\u4e0e\u56de\u663e\u529f\u80fd\u6b63\u5e38\u5ba2\u6237\u7aef\u53d1\u9001\u6d88\u606f\u540e，\u670d\u52a1\u5668\u7684 serviceIO \u7ebf\u7a0b\u6210\u529f\u8bfb\u53d6\u4e86\u6d88\u606f\u5e76\u539f\u6837\u56de\u663e：\u5ba2\u6237\u7aef 1 \u53d1\u9001 aaa，\u6536\u5230 server echo# aaa\u3002\u5ba2\u6237\u7aef 2 \u53d1\u9001 hhh，\u6536\u5230 server echo# hhh\u3002 \u8fd9\u8bc1\u660e\u4e24\u4e2a\u7ebf\u7a0b\u6c60\u7684\u5de5\u4f5c\u7ebf\u7a0b，\u90fd\u6210\u529f\u4ece\u4efb\u52a1\u961f\u5217\u4e2d\u53d6\u51fa\u4e86\u4efb\u52a1，\u5e76\u5728\u540e\u53f0\u6267\u884c\u4e86 serviceIO \u51fd\u6570，\u903b\u8f91\u6b63\u5e38\u3002<\/p>\n

    \u957f\u8fde\u63a5\u548c\u77ed\u8fde\u63a5<\/h3>\n

    \u5728\u5b9e\u73b0\u7ebf\u7a0b\u6c60\u7248\u672c\u7684\u56de\u663e\u670d\u52a1\u5668\u65f6，\u6211\u4eec\u901a\u5e38\u4f1a\u9047\u5230\u4e86\u4e00\u4e2a\u5178\u578b\u7684\u8bbe\u8ba1\u9009\u62e9：\u957f\u8fde\u63a5\u4e0e\u77ed\u8fde\u63a5\u6a21\u578b\u3002\u8fd9\u4e24\u79cd\u6a21\u578b\u7684\u6838\u5fc3\u533a\u522b，\u76f4\u63a5\u4f53\u73b0\u5728 serviceIO \u51fd\u6570\u7684\u5b9e\u73b0\u65b9\u5f0f\u4e0a，\u4e5f\u5f71\u54cd\u4e86\u7ebf\u7a0b\u6c60\u7684\u5de5\u4f5c\u8868\u73b0\u3002<\/p>\n

    \u5728\u5f53\u524d\u7684\u5b9e\u73b0\u4e2d，serviceIO \u91c7\u7528\u4e86\u957f\u8fde\u63a5\u6a21\u578b：\u51fd\u6570\u5185\u90e8\u901a\u8fc7 while(true) \u5faa\u73af，\u6301\u7eed\u4e3a\u540c\u4e00\u4e2a\u5ba2\u6237\u7aef\u670d\u52a1，\u76f4\u5230\u5ba2\u6237\u7aef\u4e3b\u52a8\u65ad\u5f00\u6216\u53d1\u751f\u9519\u8bef\u3002\u8fd9\u79cd\u8bbe\u8ba1\u4e0b，\u7ebf\u7a0b\u6c60\u4e2d\u7684\u4e00\u4e2a\u5de5\u4f5c\u7ebf\u7a0b，\u4f1a\u88ab\u4e00\u4e2a\u5ba2\u6237\u7aef\u957f\u671f\u5360\u7528，\u540c\u6837\u5c31\u4e0d\u80fd\u88ab\u5206\u914d\u7ed9\u5176\u4ed6\u5ba2\u6237\u7aef，\u8fd9\u662f\u957f\u8fde\u63a5\u7684\u7279\u6027\u3002<\/p>\n

    \u5982\u679c\u6539\u4e3a\u77ed\u8fde\u63a5\u6a21\u578b，\u53ea\u9700\u79fb\u9664 while(true) \u5faa\u73af，\u8ba9 serviceIO \u6267\u884c\u4e00\u6b21\u8bfb\u5199\u56de\u663e\u540e，\u4e3b\u52a8\u8c03\u7528 close(sockfd) \u5173\u95ed\u8fde\u63a5\u3002\u8fd9\u6837\u4e00\u6765，\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\u540e\u7ebf\u7a0b\u4f1a\u7acb\u5373\u91ca\u653e，\u8fd4\u56de\u7ebf\u7a0b\u6c60\u7b49\u5f85\u4e0b\u4e00\u4e2a\u4efb\u52a1，\u5c31\u80fd\u770b\u5230 \u201c\u4efb\u52a1\u5b8c\u6210\u201d \u7684\u65e5\u5fd7，\u7ebf\u7a0b\u4e5f\u80fd\u88ab\u9ad8\u6548\u590d\u7528\u3002<\/p>\n

    \u4e24\u79cd\u6a21\u578b\u5404\u6709\u9002\u7528\u573a\u666f：\u957f\u8fde\u63a5\u9002\u5408\u804a\u5929\u3001\u6e38\u620f\u8fd9\u7c7b\u9700\u8981\u9891\u7e41\u4ea4\u4e92\u7684\u573a\u666f，\u80fd\u51cf\u5c11\u8fde\u63a5\u5efa\u7acb\u7684\u5f00\u9500；\u77ed\u8fde\u63a5\u5219\u66f4\u9002\u5408 HTTP \u8fd9\u7c7b\u5355\u6b21\u8bf7\u6c42 – \u54cd\u5e94\u7684\u573a\u666f，\u80fd\u8ba9\u7ebf\u7a0b\u8d44\u6e90\u88ab\u66f4\u9ad8\u6548\u5730\u8c03\u5ea6\u3002<\/p>\n

    \u4ee3\u7801:<\/h3>\n

    EchoTcpServer.hpp :<\/p>\n

    #pragma once<\/p>\n

    #include <iostream>
    \n#include <string>
    \n#include <cstring>
    \n#include <unistd.h>
    \n#include <sys\/socket.h>
    \n#include <arpa\/inet.h>
    \n#include <netinet\/in.h>
    \n#include <sys\/wait.h>
    \n#include <pthread.h>
    \n#include "ThreadPool.hpp"
    \n#include "InetAddr.hpp"
    \n#include "Logger.hpp"<\/p>\n

    using namespace NS_LOG_MODULE;
    \nusing namespace NS_THREAD_POOL_MODULE;<\/p>\n

    using task_t = std::function<void()>;<\/p>\n

    enum
    \n{
    \n SUCCESS = 0,
    \n USAGE_ERR,
    \n SOCKET_ERR,
    \n BIND_ERR,
    \n LISTEN_ERR,
    \n FORK_ERR
    \n};<\/p>\n

    static const int gbacklog = 16;
    \nstatic const uint16_t gport = 8888;<\/p>\n

    class TcpServer
    \n{
    \npublic:
    \n TcpServer(uint16_t port = gport) : _port(port)
    \n {
    \n }
    \n void InitServer()
    \n {
    \n \/\/ 1. \u521b\u5efasocket
    \n _listensockfd = socket(AF_INET, SOCK_STREAM, 0); \/\/ TCP
    \n if (_listensockfd < 0)
    \n {
    \n LOG(LogLevel::FATAL) << "create socket error";
    \n exit(SOCKET_ERR);
    \n }
    \n LOG(LogLevel::DEBUG) << "create socket success: " << _listensockfd;
    \n \/\/ 2. \u586b\u5145\u672c\u5730socket\u4fe1\u606f
    \n struct sockaddr_in local;
    \n memset(&local, 0, sizeof(local));
    \n local.sin_family = AF_INET;
    \n local.sin_port = htons(_port);
    \n local.sin_addr.s_addr = INADDR_ANY; \/\/ \u4efb\u610f\u5730\u5740bind<\/p>\n

    \/\/ 3. bind
    \n int n = bind(_listensockfd, (struct sockaddr *)&local, sizeof(local));
    \n if (n < 0)
    \n {
    \n LOG(LogLevel::FATAL) << "bind error";
    \n exit(BIND_ERR);
    \n }
    \n LOG(LogLevel::DEBUG) << "bind socket success";<\/p>\n

    \/\/ 4. tcp\u662f\u9762\u5411\u8fde\u63a5\u7684，\u6240\u4ee5，TCP\u670d\u52a1\u5668\u8981\u5904\u4e8e\u4e00\u79cd\u53eb\u505alisten，\u76d1\u542c\u72b6\u6001\u3002
    \n n = listen(_listensockfd, gbacklog);
    \n if (n < 0)
    \n {
    \n LOG(LogLevel::FATAL) << "listen error";
    \n exit(LISTEN_ERR);
    \n }
    \n LOG(LogLevel::DEBUG) << "listen socket success";
    \n }
    \n void serviceIO(int sockfd, InetAddr address)
    \n {
    \n \/\/ tcp sockfd, \u5168\u53cc\u5de5
    \n \/\/ \u957f\u670d\u52a1，\u957f\u8fde\u63a5
    \n LOG(LogLevel::DEBUG) << "clinet info is : " << address.ToString();
    \n while (true)
    \n {
    \n char inbuffer[1024] = {0};
    \n \/\/ \u8bfb
    \n ssize_t n = read(sockfd, inbuffer, sizeof(inbuffer) – 1);
    \n if (n > 0)
    \n {
    \n inbuffer[n] = 0;
    \n LOG(LogLevel::INFO) << address.ToString() << " say# " << inbuffer;<\/p>\n

    \/\/ \u5199
    \n std::string echo_string = "server echo# ";
    \n echo_string += inbuffer;<\/p>\n

    write(sockfd, echo_string.c_str(), echo_string.size());
    \n }
    \n else if (n == 0)
    \n {
    \n LOG(LogLevel::INFO) << "client quit, address: " << address.ToString();
    \n break;
    \n }
    \n else
    \n {
    \n LOG(LogLevel::ERROR) << "client read error, address: " << address.ToString();
    \n break;
    \n }
    \n }
    \n }
    \n class ThreadData \/\/\u5185\u90e8\u7c7b
    \n {
    \n public:
    \n ThreadData(TcpServer *ts, int sockfd, const InetAddr &addr)
    \n : _this(ts), _sockfd(sockfd), _addr(addr)
    \n {
    \n }
    \n ~ThreadData()
    \n {
    \n close(_sockfd);
    \n }<\/p>\n

    public:
    \n TcpServer *_this;
    \n int _sockfd;
    \n InetAddr _addr;
    \n };<\/p>\n

    static void *thread_routine(void *args)
    \n {
    \n ThreadData *td = static_cast<ThreadData *>(args);
    \n pthread_detach(pthread_self());
    \n td->_this->serviceIO(td->_sockfd, td->_addr);
    \n delete td;
    \n return nullptr;
    \n }<\/p>\n

    void Start()
    \n {
    \n while (true)
    \n {
    \n struct sockaddr_in clientaddr;
    \n socklen_t len = sizeof(clientaddr);
    \n \/\/ 5. \u83b7\u53d6\u8fde\u63a5
    \n int sockfd = accept(_listensockfd, (struct sockaddr *)&clientaddr, &len);
    \n if (sockfd < 0)
    \n {
    \n LOG(LogLevel::WARNING) << "accept errr!";
    \n continue;
    \n }
    \n LOG(LogLevel::DEBUG) << "accept success, sockfd: " << sockfd;
    \n \/\/ version 4: \u63a5\u5165\u7ebf\u7a0b\u6c60
    \n InetAddr clientaddress(clientaddr);
    \n ThreadPool<task_t>::Instance()->Enqueue([this, sockfd, clientaddress]()->void{
    \n this->serviceIO(sockfd, clientaddress);
    \n });
    \n }
    \n }
    \n ~TcpServer()
    \n {
    \n close(_listensockfd);
    \n }<\/p>\n

    private:
    \n uint16_t _port;
    \n \/\/ \u4e0d\u9700\u8981\u663e\u793a\u5305\u542bip
    \n int _listensockfd;
    \n};<\/p>\n

    \u5ba2\u6237\u7aef\u4ee3\u7801\u3001\u670d\u52a1\u7aef\u4e3b\u51fd\u6570\u3001\u7f51\u7edc\u8fde\u63a5\u903b\u8f91\u548c\u4e1a\u52a1\u5904\u7406\u51fd\u6570 serviceIO \u5747\u65e0\u9700\u4fee\u6539，\u4ec5\u9700\u5728\u670d\u52a1\u7aef\u5934\u6587\u4ef6\u4e2d\u5f15\u5165 ThreadPool.hpp \u5373\u53ef\u3002<\/p>\n

    \u4e03\u3001\u603b\u7ed3<\/h2>\n

    \u672c\u6587\u8be6\u7ec6\u4ecb\u7ecd\u4e86\u4eceUDP\u8fc7\u6e21\u5230TCP\u534f\u8bae\u7684\u5b66\u4e60\u8fc7\u7a0b，\u5bf9\u6bd4\u4e86\u4e24\u79cd\u534f\u8bae\u7684\u6838\u5fc3\u5dee\u5f02\u3002TCP\u534f\u8bae\u5177\u6709\u8fde\u63a5\u53ef\u9760\u3001\u6709\u5e8f\u4f20\u8f93\u7b49\u7279\u70b9，\u9002\u5408\u6b63\u5f0f\u4e1a\u52a1\u573a\u666f\u3002\u6587\u7ae0\u901a\u8fc7\u56db\u4e2a\u9636\u6bb5\u9010\u6b65\u5b9e\u73b0TCP\u670d\u52a1\u7aef：\u5355\u7ebf\u7a0b\u7248\u672c\u68b3\u7406\u57fa\u7840\u6d41\u7a0b；\u591a\u8fdb\u7a0b\u7248\u672c\u5f15\u5165\u5e76\u53d1\u5904\u7406；\u591a\u7ebf\u7a0b\u7248\u672c\u4f18\u5316\u8d44\u6e90\u5f00\u9500；\u6700\u7ec8\u91c7\u7528\u7ebf\u7a0b\u6c60\u6a21\u578b\u5b9e\u73b0\u9ad8\u6548\u53ef\u63a7\u7684\u5e76\u53d1\u3002\u6bcf\u4e2a\u9636\u6bb5\u90fd\u5305\u542b\u4ee3\u7801\u5b9e\u73b0\u548c\u8fd0\u884c\u9a8c\u8bc1，\u5b8c\u6574\u5c55\u73b0\u4e86TCP\u670d\u52a1\u5668\u7684\u5f00\u53d1\u6f14\u8fdb\u8def\u5f84，\u4e3a\u7f51\u7edc\u7f16\u7a0b\u63d0\u4f9b\u4e86\u5b9e\u7528\u53c2\u8003\u3002<\/p>\n

    \u8c22\u8c22\u5927\u5bb6\u7684\u89c2\u770b!<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u76ee\u5f55
    \n\u4e00\u3001\u4ece UDP \u8fc7\u6e21\u5230 TCP \u534f\u8bae
    \n\u4e8c\u3001TCP \u7f16\u7801\u73af\u8282
    \n\u4e09\u3001\u9636\u6bb5\u4e00 : \u5355\u8fdb\u7a0b\/\u5355\u7ebf\u7a0b\u7248\u672c
    \n\u94fa\u57ab
    \n\u601d\u8def\u603b\u7ed3
    \nEchoTcpServer.hpp \u670d\u52a1\u7aef:
    \n\u6784\u9020\u51fd\u6570
    \n\u521d\u59cb\u5316\u51fd\u6570 InitServer()
    \nlisten()
    \n\u542f\u52a8\u4e3b\u5faa\u73af Start() \u51fd\u6570
    \naccept()
    \n\u4e1a\u52a1\u5904\u7406\u51fd\u6570 serviceIO()
    \nEchoTcpServerMain.cc \u670d\u52a1\u7aef:
    \nEchoTcpClient.cc \u5ba2\u6237\u7aef:
    \nconnect()
    \n\u8fd0\u884c\u7ed3\u679c: <\/p>\n","protected":false},"author":2,"featured_media":82176,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,58,205,190,78],"topic":[],"class_list":["post-82196","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-c","tag-linux","tag-tcp-ip","tag-190","tag-78"],"yoast_head":"\nLinux \u7f51\u7edc\u5957\u63a5\u5b57\u7f16\u7a0b\uff08\u4e94\uff09TCP \u56de\u58f0\u670d\u52a1\u5668\u7684\u5b9e\u73b0\uff08\u5355\u8fdb\u7a0b(\u5355\u7ebf\u7a0b)\/\u591a\u8fdb\u7a0b\/\u591a\u7ebf\u7a0b\/\u7ebf\u7a0b\u6c60\u56db\u4e2a\u7248\u672c\uff09 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/82196.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Linux \u7f51\u7edc\u5957\u63a5\u5b57\u7f16\u7a0b\uff08\u4e94\uff09TCP \u56de\u58f0\u670d\u52a1\u5668\u7684\u5b9e\u73b0\uff08\u5355\u8fdb\u7a0b(\u5355\u7ebf\u7a0b)\/\u591a\u8fdb\u7a0b\/\u591a\u7ebf\u7a0b\/\u7ebf\u7a0b\u6c60\u56db\u4e2a\u7248\u672c\uff09 - 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