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\u9884\u5907\u77e5\u8bc6<\/h2>\n\n\n\n

\u7406\u89e3\u6e90IP\u5730\u5740\u548c\u76ee\u7684IP\u5730\u5740<\/h3>\n\n\n\n

\u56e0\u7279\u7f51\u4e0a\u7684\u6bcf\u53f0\u8ba1\u7b97\u673a\u90fd\u6709\u4e00\u4e2a\u552f\u4e00\u7684IP\u5730\u5740\uff0c\u5982\u679c\u4e00\u53f0\u4e3b\u673a\u4e0a\u7684\u6570\u636e\u8981\u4f20\u8f93\u5230\u53e6\u4e00\u53f0\u4e3b\u673a\uff0c\u90a3\u4e48\u5bf9\u7aef\u4e3b\u673a\u7684IP\u5730\u5740\u5c31\u5e94\u8be5\u4f5c\u4e3a\u8be5\u6570\u636e\u4f20\u8f93\u65f6\u7684\u76ee\u7684IP\u5730\u5740\u3002\u4f46\u4ec5\u4ec5\u77e5\u9053\u76ee\u7684IP\u5730\u5740\u662f\u4e0d\u591f\u7684\uff0c\u5f53\u5bf9\u7aef\u4e3b\u673a\u6536\u5230\u8be5\u6570\u636e\u540e\uff0c\u5bf9\u7aef\u4e3b\u673a\u8fd8\u9700\u8981\u5bf9\u8be5\u4e3b\u673a\u505a\u51fa\u54cd\u5e94\uff0c\u56e0\u6b64\u5bf9\u7aef\u4e3b\u673a\u4e5f\u9700\u8981\u53d1\u9001\u6570\u636e\u7ed9\u8be5\u4e3b\u673a\uff0c\u6b64\u65f6\u5bf9\u7aef\u4e3b\u673a\u5c31\u5fc5\u987b\u77e5\u9053\u8be5\u4e3b\u673a\u7684IP\u5730\u5740\u3002\u56e0\u6b64\u4e00\u4e2a\u4f20\u8f93\u7684\u6570\u636e\u5f53\u4e2d\u5e94\u8be5\u6db5\u76d6\u5176\u6e90IP\u5730\u5740\u548c\u76ee\u7684IP\u5730\u5740\uff0c\u76ee\u7684IP\u5730\u5740\u8868\u660e\u8be5\u6570\u636e\u4f20\u8f93\u7684\u76ee\u7684\u5730\uff0c\u6e90IP\u5730\u5740\u4f5c\u4e3a\u5bf9\u7aef\u4e3b\u673a\u54cd\u5e94\u65f6\u7684\u76ee\u7684IP\u5730\u5740\u3002<\/p>\n\n\n\n

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\u7406\u89e3\u6e90MAC\u5730\u5740\u548c\u76ee\u7684MAC\u5730\u5740<\/h3>\n\n\n\n

\u5927\u90e8\u5206\u6570\u636e\u7684\u4f20\u8f93\u90fd\u662f\u8de8\u5c40\u57df\u7f51\u7684\uff0c\u6570\u636e\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u4f1a\u7ecf\u8fc7\u82e5\u5e72\u4e2a\u8def\u7531\u5668\uff0c\u6700\u7ec8\u624d\u80fd\u5230\u8fbe\u5bf9\u7aef\u4e3b\u673a\u3002<\/p>\n\n\n\n

\"img\"\/<\/div><\/figure>\n\n\n\n

\u6e90MAC\u5730\u5740\u548c\u76ee\u7684MAC\u5730\u5740\u662f\u5305\u542b\u5728\u94fe\u8def\u5c42\u7684\u62a5\u5934\u5f53\u4e2d\u7684\uff0c\u800cMAC\u5730\u5740\u5b9e\u9645\u53ea\u5728\u5f53\u524d\u5c40\u57df\u7f51\u5185\u6709\u6548\uff0c\u56e0\u6b64\u5f53\u6570\u636e\u8de8\u7f51\u7edc\u5230\u8fbe\u53e6\u4e00\u4e2a\u5c40\u57df\u7f51\u65f6\uff0c\u5176\u6e90MAC\u5730\u5740\u548c\u76ee\u7684MAC\u5730\u5740\u5c31\u9700\u8981\u53d1\u751f\u53d8\u5316\uff0c\u56e0\u6b64\u5f53\u6570\u636e\u8fbe\u5230\u8def\u7531\u5668\u65f6\uff0c\u8def\u7531\u5668\u4f1a\u5c06\u8be5\u6570\u636e\u5f53\u4e2d\u94fe\u8def\u5c42\u7684\u62a5\u5934\u53bb\u6389\uff0c\u7136\u540e\u518d\u91cd\u65b0\u5c01\u88c5\u4e00\u4e2a\u62a5\u5934\uff0c\u6b64\u65f6\u8be5\u6570\u636e\u7684\u6e90MAC\u5730\u5740\u548c\u76ee\u7684MAC\u5730\u5740\u5c31\u53d1\u751f\u4e86\u53d8\u5316\u3002<\/p>\n\n\n\n

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\u65f6\u95f4\u8f74<\/th>\u6e90MAC\u5730\u5740<\/th>\u76ee\u7684MAC\u5730\u5740<\/th><\/tr><\/thead>
\u521a\u5f00\u59cb<\/td>\u4e3b\u673a1\u7684MAC\u5730\u5740<\/td>\u8def\u7531\u5668A\u7684MAC\u5730\u5740<\/td><\/tr>
\u7ecf\u8fc7\u8def\u7531\u5668A\u4e4b\u540e<\/td>\u8def\u7531\u5668A\u7684MAC\u5730\u5740<\/td>\u8def\u7531\u5668B\u7684MAC\u5730\u5740<\/td><\/tr>
\u7ecf\u8fc7\u8def\u7531\u5668B\u4e4b\u540e<\/td>\u8def\u7531\u5668B\u7684MAC\u5730\u5740<\/td>\u8def\u7531\u5668C\u7684MAC\u5730\u5740<\/td><\/tr>
\u7ecf\u8fc7\u8def\u7531\u5668C\u4e4b\u540e<\/td>\u8def\u7531\u5668C\u7684MAC\u5730\u5740<\/td>\u8def\u7531\u5668D\u7684MAC\u5730\u5740<\/td><\/tr>
\u7ecf\u8fc7\u8def\u7531\u5668D\u4e4b\u540e<\/td>\u8def\u7531\u5668D\u7684MAC\u5730\u5740<\/td>\u4e3b\u673a2\u7684MAC\u5730\u5740<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u56e0\u6b64\u6570\u636e\u5728\u4f20\u8f93\u7684\u8fc7\u7a0b\u4e2d\u662f\u6709\u4e24\u5957\u5730\u5740\uff1a<\/p>\n\n\n\n

    \n
  • \u4e00\u5957\u662f\u6e90IP\u5730\u5740\u548c\u76ee\u7684IP\u5730\u5740\uff0c\u8fd9\u4e24\u4e2a\u5730\u5740\u5728\u6570\u636e\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u57fa\u672c\u662f\u4e0d\u4f1a\u53d1\u751f\u53d8\u5316\u7684\uff08\u5b58\u5728\u4e00\u4e9b\u7279\u6b8a\u60c5\u51b5\uff0c\u6bd4\u5982\u5728\u6570\u636e\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u4f7f\u7528NET\u6280\u672f\uff0c\u5176\u6e90IP\u5730\u5740\u4f1a\u53d1\u751f\u53d8\u5316\uff0c\u4f46\u81f3\u5c11\u76ee\u7684IP\u5730\u5740\u662f\u4e0d\u4f1a\u53d8\u5316\u7684\uff09\u3002<\/li>\n\n\n\n
  • \u53e6\u4e00\u5957\u5c31\u662f\u6e90MAC\u5730\u5740\u548c\u76ee\u7684MAC\u5730\u5740\uff0c\u8fd9\u4e24\u4e2a\u5730\u5740\u662f\u4e00\u76f4\u5728\u53d1\u751f\u53d8\u5316\u7684\uff0c\u56e0\u4e3a\u5728\u6570\u636e\u4f20\u8f93\u7684\u8fc7\u7a0b\u4e2d\u8def\u7531\u5668\u4e0d\u65ad\u5728\u8fdb\u884c\u89e3\u5305\u548c\u91cd\u65b0\u5c01\u88c5\u3002<\/li>\n<\/ul>\n\n\n\n

    \u7406\u89e3\u6e90\u7aef\u53e3\u53f7\u548c\u76ee\u7684\u7aef\u53e3\u53f7<\/h3>\n\n\n\n

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    \n

    socket\u901a\u4fe1\u7684\u672c\u8d28<\/p>\n<\/blockquote>\n\n\n\n

    \u73b0\u5728\u901a\u8fc7IP\u5730\u5740\u548cMAC\u5730\u5740\u5df2\u7ecf\u80fd\u591f\u5c06\u6570\u636e\u53d1\u9001\u5230\u5bf9\u7aef\u4e3b\u673a\u4e86\uff0c\u4f46\u5b9e\u9645\u6211\u4eec\u662f\u60f3\u5c06\u6570\u636e\u53d1\u9001\u7ed9\u5bf9\u7aef\u4e3b\u673a\u4e0a\u7684\u67d0\u4e2a\u670d\u52a1\u8fdb\u7a0b\uff0c\u6b64\u5916\uff0c\u6570\u636e\u7684\u53d1\u9001\u8005\u4e5f\u4e0d\u662f\u4e3b\u673a\uff0c\u800c\u662f\u4e3b\u673a\u4e0a\u7684\u67d0\u4e2a\u8fdb\u7a0b\uff0c\u6bd4\u5982\u5f53\u6211\u4eec\u7528\u6d4f\u89c8\u5668\u8bbf\u95ee\u6570\u636e\u65f6\uff0c\u5b9e\u9645\u5c31\u662f\u6d4f\u89c8\u5668\u8fdb\u7a0b\u5411\u5bf9\u7aef\u670d\u52a1\u8fdb\u7a0b\u53d1\u8d77\u7684\u8bf7\u6c42\u3002<\/p>\n\n\n\n

    \"img\"\/<\/div><\/figure>\n\n\n\n

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    \n

    \u7aef\u53e3\u53f7<\/p>\n<\/blockquote>\n\n\n\n

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      \n
    • \u7aef\u53e3\u53f7\u662f\u4f20\u8f93\u5c42\u534f\u8bae\u7684\u5185\u5bb9\u3002<\/li>\n\n\n\n
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    • \u4e00\u4e2a\u7aef\u53e3\u53f7\u53ea\u80fd\u88ab\u4e00\u4e2a\u8fdb\u7a0b\u5360\u7528\u3002<\/li>\n<\/ul>\n\n\n\n

      \u7531\u4e8eIP\u5730\u5740\u80fd\u591f\u552f\u4e00\u6807\u8bc6\u516c\u7f51\u5185\u7684\u4e00\u53f0\u4e3b\u673a\uff0c\u800c\u7aef\u53e3\u53f7\u80fd\u591f\u552f\u4e00\u6807\u8bc6\u4e00\u53f0\u4e3b\u673a\u4e0a\u7684\u4e00\u4e2a\u8fdb\u7a0b\uff0c\u56e0\u6b64\u7528IP\u5730\u5740+\u7aef\u53e3\u53f7\u5c31\u80fd\u591f\u552f\u4e00\u6807\u8bc6\u7f51\u7edc\u4e0a\u7684\u67d0\u4e00\u53f0\u4e3b\u673a\u7684\u67d0\u4e00\u4e2a\u8fdb\u7a0b\u3002<\/p>\n\n\n\n

      \u5f53\u6570\u636e\u5728\u4f20\u8f93\u5c42\u8fdb\u884c\u5c01\u88c5\u65f6\uff0c\u5c31\u4f1a\u6dfb\u52a0\u4e0a\u5bf9\u5e94\u6e90\u7aef\u53e3\u53f7\u548c\u76ee\u7684\u7aef\u53e3\u53f7\u7684\u4fe1\u606f\u3002\u8fd9\u65f6\u901a\u8fc7\u6e90IP\u5730\u5740+\u6e90\u7aef\u53e3\u53f7\u5c31\u80fd\u591f\u5728\u7f51\u7edc\u4e0a\u552f\u4e00\u6807\u8bc6\u53d1\u9001\u6570\u636e\u7684\u8fdb\u7a0b\uff0c\u901a\u8fc7\u76ee\u7684IP\u5730\u5740+\u76ee\u7684\u7aef\u53e3\u53f7\u5c31\u80fd\u591f\u5728\u7f51\u7edc\u4e0a\u552f\u4e00\u6807\u8bc6\u63a5\u6536\u6570\u636e\u7684\u8fdb\u7a0b\uff0c\u6b64\u65f6\u5c31\u5b9e\u73b0\u4e86\u8de8\u7f51\u7edc\u7684\u8fdb\u7a0b\u95f4\u901a\u4fe1\u3002<\/p>\n\n\n\n

      \u6ce8\u610f\uff1a<\/strong> \u56e0\u4e3a\u7aef\u53e3\u53f7\u662f\u96b6\u5c5e\u4e8e\u67d0\u53f0\u4e3b\u673a\u7684\uff0c\u6240\u4ee5\u7aef\u53e3\u53f7\u53ef\u4ee5\u5728\u4e24\u53f0\u4e0d\u540c\u7684\u4e3b\u673a\u5f53\u4e2d\u91cd\u590d\uff0c\u4f46\u662f\u540c\u4e00\u53f0\u4e3b\u673a\u4e0a\u8fdb\u884c\u7f51\u7edc\u901a\u4fe1\u7684\u8fdb\u7a0b\u7684\u7aef\u53e3\u53f7\u4e0d\u80fd\u91cd\u590d\u3002\u6b64\u5916\uff0c\u4e00\u4e2a\u8fdb\u7a0b\u53ef\u4ee5\u7ed1\u5b9a\u591a\u4e2a\u7aef\u53e3\u53f7\uff0c\u4f46\u662f\u4e00\u4e2a\u7aef\u53e3\u53f7\u4e0d\u80fd\u88ab\u591a\u4e2a\u8fdb\u7a0b\u540c\u65f6\u7ed1\u5b9a\u3002<\/p>\n\n\n\n

      \n

      \u7406\u89e3socket\u8fd9\u4e2a\u540d\u5b57<\/p>\n<\/blockquote>\n\n\n\n

      socket\u5728\u82f1\u6587\u4e0a\u6709\u201c\u63d2\u5ea7\u201d\u7684\u610f\u601d\uff0c\u63d2\u5ea7\u6709\u4e0d\u540c\u89c4\u683c\u7684\u63d2\u5b54\uff0c\u6211\u4eec\u5c06\u63d2\u5934\u63d2\u5165\u5230\u5bf9\u5e94\u7684\u63d2\u5b54\u5f53\u4e2d\u5c31\u80fd\u591f\u5b9e\u73b0\u7535\u6d41\u7684\u4f20\u8f93\u3002<\/p>\n\n\n\n

      \u5728\u8fdb\u884c\u7f51\u7edc\u901a\u4fe1\u65f6\uff0c\u5ba2\u6237\u7aef\u5c31\u76f8\u5f53\u4e8e\u63d2\u5934\uff0c\u670d\u52a1\u7aef\u5c31\u76f8\u5f53\u4e8e\u4e00\u4e2a\u63d2\u5ea7\uff0c\u4f46\u670d\u52a1\u7aef\u4e0a\u53ef\u80fd\u4f1a\u6709\u591a\u4e2a\u4e0d\u540c\u7684\u670d\u52a1\u8fdb\u7a0b\uff08\u591a\u4e2a\u63d2\u5b54\uff09\uff0c\u56e0\u6b64\u5f53\u6211\u4eec\u5728\u8bbf\u95ee\u670d\u52a1\u65f6\u9700\u8981\u6307\u660e\u670d\u52a1\u8fdb\u7a0b\u7684\u7aef\u53e3\u53f7\uff08\u5bf9\u5e94\u89c4\u683c\u7684\u63d2\u5b54\uff09\uff0c\u624d\u80fd\u4eab\u53d7\u5bf9\u5e94\u670d\u52a1\u8fdb\u7a0b\u7684\u670d\u52a1\u3002<\/p>\n\n\n\n

      PORT VS PID<\/h3>\n\n\n\n
      \n

      \u7aef\u53e3\u53f7\uff08port\uff09\u7684\u4f5c\u7528\u552f\u4e00\u6807\u8bc6\u4e00\u53f0\u4e3b\u673a\u4e0a\u7684\u67d0\u4e2a\u8fdb\u7a0b\uff0c\u8fdb\u7a0bID\uff08PID\uff09\u7684\u4f5c\u7528\u4e5f\u662f\u552f\u4e00\u6807\u8bc6\u4e00\u53f0\u4e3b\u673a\u4e0a\u7684\u67d0\u4e2a\u8fdb\u7a0b\uff0c\u90a3\u5728\u8fdb\u884c\u7f51\u7edc\u901a\u4fe1\u65f6\u4e3a\u4ec0\u4e48\u4e0d\u76f4\u63a5\u7528PID\u6765\u4ee3\u66ffport\u5462\uff1f<\/p>\n<\/blockquote>\n\n\n\n

      \u4e00\u53f0\u673a\u5668\u4e0a\u53ef\u80fd\u4f1a\u6709\u5927\u91cf\u7684\u8fdb\u7a0b\uff0c\u4f46\u5e76\u4e0d\u662f\u6240\u6709\u7684\u8fdb\u7a0b\u90fd\u8981\u8fdb\u884c\u7f51\u7edc\u901a\u4fe1\uff0c\u53ef\u80fd\u6709\u5f88\u5927\u4e00\u90e8\u5206\u7684\u8fdb\u7a0b\u662f\u4e0d\u9700\u8981\u8fdb\u884c\u7f51\u7edc\u901a\u4fe1\u7684\u672c\u5730\u8fdb\u7a0b\uff0c\u6b64\u65f6PID\u867d\u7136\u4e5f\u53ef\u4ee5\u6807\u8bc6\u8fd9\u4e9b\u7f51\u7edc\u8fdb\u7a0b\u7684\u552f\u4e00\u6027\uff0c\u4f46\u5728\u8be5\u573a\u666f\u4e0b\u5c31\u4e0d\u592a\u5408\u9002\u4e86\u3002<\/p>\n\n\n\n

      \u6bd4\u5982\u6bcf\u4e2a\u4eba\u90fd\u6709\u81ea\u5df1\u7684\u8eab\u4efd\u8bc1\u53f7\uff0c\u8eab\u4efd\u8bc1\u53f7\u5df2\u7ecf\u53ef\u4ee5\u6807\u8bc6\u6211\u4eec\u7684\u552f\u4e00\u6027\u4e86\uff0c\u4f46\u662f\u5f53\u6211\u4eec\u5230\u4e86\u5b66\u6821\u8fd8\u662f\u4f1a\u6709\u5b66\u53f7\uff0c\u5230\u4e86\u516c\u53f8\u8fd8\u662f\u4f1a\u6709\u5de5\u53f7\u3002\u8fd9\u662f\u4e3a\u4ec0\u4e48\u5462\uff1f\u4e3a\u4ec0\u4e48\u4e0d\u76f4\u63a5\u7528\u8eab\u4efd\u8bc1\u53f7\u6765\u4ee3\u66ff\u5b66\u53f7\u548c\u5de5\u53f7\u5462\uff1f<\/p>\n\n\n\n

      \u56e0\u4e3a\u8eab\u4efd\u8bc1\u53f7\u662f\u56fd\u5bb6\u7528\u4e8e\u884c\u653f\u7ba1\u7406\u65f6\u7528\u7684\u7f16\u53f7\uff0c\u800c\u5b66\u53f7\u662f\u5b66\u6821\u7528\u4e8e\u7ba1\u7406\u5b66\u751f\u65f6\u7528\u7684\u7f16\u53f7\uff0c\u5de5\u53f7\u662f\u516c\u53f8\u7528\u4e8e\u7ba1\u7406\u5458\u5de5\u65f6\u7528\u7684\u7f16\u53f7\u3002\u4f46\u5e76\u4e0d\u662f\u5168\u4e2d\u56fd\u4eba\u90fd\u5728\u67d0\u6240\u5b66\u6821\u6216\u67d0\u5bb6\u516c\u53f8\uff0c\u56e0\u6b64\u5728\u5b66\u6821\u6216\u516c\u53f8\u5f53\u4e2d\uff0c\u6ca1\u5fc5\u8981\u7528\u8eab\u4efd\u8bc1\u53f7\u6765\u6807\u8bc6\u6bcf\u4e2a\u4eba\u7684\u552f\u4e00\u6027\u3002\u6b64\u65f6\u5c31\u51fa\u73b0\u4e86\u5b66\u53f7\u548c\u5de5\u53f7\uff0c\u5728\u5b66\u53f7\u548c\u5de5\u53f7\u5f53\u4e2d\u8fd8\u53ef\u4ee5\u5305\u542b\u4e00\u4e9b\u4fbf\u4e8e\u7ba1\u7406\u7684\u4fe1\u606f\uff0c\u6bd4\u5982\u5165\u5b66\uff08\u5165\u804c\uff09\u5e74\u4efd\u3001\u6027\u522b\u7b49\u4fe1\u606f\u3002<\/p>\n\n\n\n

      \u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u4e0d\u540c\u7684\u573a\u666f\u4e0b\u53ef\u80fd\u9700\u8981\u4e0d\u540c\u7684\u7f16\u53f7\u6765\u6807\u8bc6\u67d0\u79cd\u4e8b\u7269\u7684\u552f\u4e00\u6027\uff0c\u56e0\u4e3a\u8fd9\u4e9b\u7f16\u53f7\u66f4\u9002\u5408\u7528\u4e8e\u8be5\u573a\u666f\u3002<\/p>\n\n\n\n

      \u5e95\u5c42\u5982\u4f55\u901a\u8fc7port\u627e\u5230\u5bf9\u5e94\u8fdb\u7a0b\u7684\uff1f<\/h3>\n\n\n\n

      \u5b9e\u9645\u5e95\u5c42\u91c7\u7528\u54c8\u5e0c\u7684\u65b9\u5f0f\u5efa\u7acb\u4e86\u7aef\u53e3\u53f7\u548c\u8fdb\u7a0bPID\u6216PCB\u4e4b\u95f4\u7684\u6620\u5c04\u5173\u7cfb\uff0c\u5f53\u5e95\u5c42\u62ff\u5230\u7aef\u53e3\u53f7\u65f6\u5c31\u53ef\u4ee5\u76f4\u63a5\u6267\u884c\u5bf9\u5e94\u7684\u54c8\u5e0c\u7b97\u6cd5\uff0c\u7136\u540e\u5c31\u80fd\u591f\u627e\u5230\u8be5\u7aef\u53e3\u53f7\u5bf9\u5e94\u7684\u8fdb\u7a0b\u3002<\/p>\n\n\n\n

      \u8ba4\u8bc6TCP\u534f\u8bae\u548cUDP\u534f\u8bae<\/h3>\n\n\n\n

      \u7f51\u7edc\u534f\u8bae\u6808\u662f\u8d2f\u7a7f\u6574\u4e2a\u4f53\u7cfb\u7ed3\u6784\u7684\uff0c\u5728\u5e94\u7528\u5c42\u3001\u64cd\u4f5c\u7cfb\u7edf\u5c42\u548c\u9a71\u52a8\u5c42\u5404\u6709\u4e00\u90e8\u5206\u3002\u5f53\u6211\u4eec\u4f7f\u7528\u7cfb\u7edf\u8c03\u7528\u63a5\u53e3\u5b9e\u73b0\u7f51\u7edc\u6570\u636e\u901a\u4fe1\u65f6\uff0c\u4e0d\u5f97\u4e0d\u9762\u5bf9\u7684\u534f\u8bae\u5c42\u5c31\u662f\u4f20\u8f93\u5c42\uff0c\u800c\u4f20\u8f93\u5c42\u6700\u5178\u578b\u7684\u4e24\u79cd\u534f\u8bae\u5c31\u662fTCP\u534f\u8bae\u548cUDP\u534f\u8bae\u3002<\/p>\n\n\n\n

      \n

      TCP\u534f\u8bae<\/p>\n<\/blockquote>\n\n\n\n

      TCP\u534f\u8bae\u53eb\u505a\u4f20\u8f93\u63a7\u5236\u534f\u8bae\uff08Transmission Control Protocol\uff09\uff0cTCP\u534f\u8bae\u662f\u4e00\u79cd\u9762\u5411\u8fde\u63a5\u7684\u3001\u53ef\u9760\u7684\u3001\u57fa\u4e8e\u5b57\u8282\u6d41\u7684\u4f20\u8f93\u5c42\u901a\u4fe1\u534f\u8bae\u3002<\/p>\n\n\n\n

      TCP\u534f\u8bae\u662f\u9762\u5411\u8fde\u63a5\u7684\uff0c\u5982\u679c\u4e24\u53f0\u4e3b\u673a\u4e4b\u95f4\u60f3\u8981\u8fdb\u884c\u6570\u636e\u4f20\u8f93\uff0c\u90a3\u4e48\u5fc5\u987b\u8981\u5148\u5efa\u7acb\u8fde\u63a5\uff0c\u5f53\u8fde\u63a5\u5efa\u7acb\u6210\u529f\u540e\u624d\u80fd\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u3002\u5176\u6b21\uff0cTCP\u534f\u8bae\u662f\u4fdd\u8bc1\u53ef\u9760\u7684\u534f\u8bae\uff0c\u6570\u636e\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u5982\u679c\u51fa\u73b0\u4e86\u4e22\u5305\u3001\u4e71\u5e8f\u7b49\u60c5\u51b5\uff0cTCP\u534f\u8bae\u90fd\u6709\u5bf9\u5e94\u7684\u89e3\u51b3\u65b9\u6cd5\u3002<\/p>\n\n\n\n

      \n

      UDP\u534f\u8bae<\/p>\n<\/blockquote>\n\n\n\n

      UDP\u534f\u8bae\u53eb\u505a\u7528\u6237\u6570\u636e\u62a5\u534f\u8bae\uff08User Datagram Protocol\uff09\uff0cUDP\u534f\u8bae\u662f\u4e00\u79cd\u4e0d\u53ef\u9760\u7684\u4f20\u8f93\u534f\u8bae\uff0cUDP\u534f\u8bae\u7684\u5b58\u5728\u6709\u4ec0\u4e48\u610f\u4e49\uff1f<\/p>\n\n\n\n

      \u9996\u5148\uff0c\u53ef\u9760\u662f\u9700\u8981\u6211\u4eec\u505a\u66f4\u591a\u7684\u5de5\u4f5c\u7684\uff0cTCP\u534f\u8bae\u867d\u7136\u662f\u4e00\u79cd\u53ef\u9760\u7684\u4f20\u8f93\u534f\u8bae\uff0c\u4f46\u8fd9\u4e00\u5b9a\u610f\u5473\u7740TCP\u534f\u8bae\u5728\u5e95\u5c42\u9700\u8981\u505a\u66f4\u591a\u7684\u5de5\u4f5c\uff0c\u56e0\u6b64TCP\u534f\u8bae\u5e95\u5c42\u7684\u5b9e\u73b0\u662f\u6bd4\u8f83\u590d\u6742\u7684\uff0c\u6211\u4eec\u4e0d\u80fd\u53ea\u770b\u5230TCP\u534f\u8bae\u9762\u5411\u8fde\u63a5\u53ef\u9760\u8fd9\u4e00\u4e2a\u7279\u70b9\uff0c\u6211\u4eec\u4e5f\u8981\u80fd\u770b\u5230TCP\u534f\u8bae\u5bf9\u5e94\u7684\u7f3a\u70b9\u3002<\/p>\n\n\n\n

      \u540c\u6837\u7684\uff0cUDP\u534f\u8bae\u867d\u7136\u662f\u4e00\u79cd\u4e0d\u53ef\u9760\u7684\u4f20\u8f93\u534f\u8bae\uff0c\u4f46\u8fd9\u4e00\u5b9a\u610f\u5473\u7740UDP\u534f\u8bae\u5728\u5e95\u5c42\u4e0d\u9700\u8981\u505a\u8fc7\u591a\u7684\u5de5\u4f5c\uff0c\u56e0\u6b64UDP\u534f\u8bae\u5e95\u5c42\u7684\u5b9e\u73b0\u4e00\u5b9a\u6bd4TCP\u534f\u8bae\u8981\u7b80\u5355\uff0cUDP\u534f\u8bae\u867d\u7136\u4e0d\u53ef\u9760\uff0c\u4f46\u662f\u5b83\u80fd\u5feb\u901f\u7684\u5c06\u6570\u636e\u53d1\u9001\u7ed9\u5bf9\u65b9\uff0c\u867d\u7136\u5728\u6570\u636e\u5728\u4f20\u8f93\u7684\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u4f1a\u51fa\u9519\u3002<\/p>\n\n\n\n

      \u7f16\u5199\u7f51\u7edc\u901a\u4fe1\u4ee3\u7801\u65f6\u5177\u4f53\u91c7\u7528TCP\u534f\u8bae\u8fd8\u662fUDP\u534f\u8bae\uff0c\u5b8c\u5168\u53d6\u51b3\u4e8e\u4e0a\u5c42\u7684\u5e94\u7528\u573a\u666f\u3002\u5982\u679c\u5e94\u7528\u573a\u666f\u4e25\u683c\u8981\u6c42\u6570\u636e\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u7684\u53ef\u9760\u6027\uff0c\u6b64\u65f6\u6211\u4eec\u5c31\u5fc5\u987b\u91c7\u7528TCP\u534f\u8bae\uff0c\u5982\u679c\u5e94\u7528\u573a\u666f\u5141\u8bb8\u6570\u636e\u5728\u4f20\u8f93\u51fa\u73b0\u5c11\u91cf\u4e22\u5305\uff0c\u90a3\u4e48\u6211\u4eec\u80af\u5b9a\u4f18\u5148\u9009\u62e9UDP\u534f\u8bae\uff0c\u56e0\u4e3aUDP\u534f\u8bae\u8db3\u591f\u7b80\u5355\u3002<\/p>\n\n\n\n

      \u6ce8\u610f\uff1a<\/strong> \u4e00\u4e9b\u4f18\u79c0\u7684\u7f51\u7ad9\u5728\u8bbe\u8ba1\u7f51\u7edc\u901a\u4fe1\u7b97\u6cd5\u65f6\uff0c\u4f1a\u540c\u65f6\u91c7\u7528TCP\u534f\u8bae\u548cUDP\u534f\u8bae\uff0c\u5f53\u7f51\u7edc\u6d41\u7545\u65f6\u5c31\u4f7f\u7528UDP\u534f\u8bae\u8fdb\u884c\u6570\u636e\u4f20\u8f93\uff0c\u800c\u5f53\u7f51\u901f\u4e0d\u597d\u65f6\u5c31\u662f\u7528TCP\u534f\u8bae\u8fdb\u884c\u6570\u636e\u4f20\u8f93\uff0c\u6b64\u65f6\u5c31\u53ef\u4ee5\u52a8\u6001\u7684\u8c03\u6574\u540e\u53f0\u6570\u636e\u901a\u4fe1\u7684\u7b97\u6cd5\u3002<\/p>\n\n\n\n

      \u7f51\u7edc\u5b57\u8282\u5e8f<\/h3>\n\n\n\n
      \n

      \u7f51\u7edc\u4e2d\u7684\u5927\u5c0f\u7aef\u95ee\u9898<\/p>\n<\/blockquote>\n\n\n\n

      \u8ba1\u7b97\u673a\u5728\u5b58\u50a8\u6570\u636e\u65f6\u662f\u6709\u5927\u5c0f\u7aef\u7684\u6982\u5ff5\u7684\uff1a<\/p>\n\n\n\n

        \n
      • \u5927\u7aef\u6a21\u5f0f\uff1a<\/strong> \u6570\u636e\u7684\u9ad8\u5b57\u8282\u5185\u5bb9\u4fdd\u5b58\u5728\u5185\u5b58\u7684\u4f4e\u5730\u5740\u5904\uff0c\u6570\u636e\u7684\u4f4e\u5b57\u8282\u5185\u5bb9\u4fdd\u5b58\u5728\u5185\u5b58\u7684\u9ad8\u5730\u5740\u5904\u3002<\/li>\n\n\n\n
      • \u5c0f\u7aef\u6a21\u5f0f\uff1a<\/strong> \u6570\u636e\u7684\u9ad8\u5b57\u8282\u5185\u5bb9\u4fdd\u5b58\u5728\u5185\u5b58\u7684\u9ad8\u5730\u5740\u5904\uff0c\u6570\u636e\u7684\u4f4e\u5b57\u8282\u5185\u5bb9\u4fdd\u5b58\u5728\u5185\u5b58\u7684\u4f4e\u5730\u5740\u5904\u3002<\/li>\n<\/ul>\n\n\n\n

        \u5982\u679c\u7f16\u5199\u7684\u7a0b\u5e8f\u53ea\u5728\u672c\u5730\u673a\u5668\u4e0a\u8fd0\u884c\uff0c\u90a3\u4e48\u662f\u4e0d\u9700\u8981\u8003\u8651\u5927\u5c0f\u7aef\u95ee\u9898\u7684\uff0c\u56e0\u4e3a\u540c\u4e00\u53f0\u673a\u5668\u4e0a\u7684\u6570\u636e\u91c7\u7528\u7684\u5b58\u50a8\u65b9\u5f0f\u90fd\u662f\u4e00\u6837\u7684\uff0c\u8981\u4e48\u91c7\u7528\u7684\u90fd\u662f\u5927\u7aef\u5b58\u50a8\u6a21\u5f0f\uff0c\u8981\u4e48\u91c7\u7528\u7684\u90fd\u662f\u5c0f\u7aef\u5b58\u50a8\u6a21\u5f0f\u3002\u4f46\u5982\u679c\u6d89\u53ca\u7f51\u7edc\u901a\u4fe1\uff0c\u90a3\u5c31\u5fc5\u987b\u8003\u8651\u5927\u5c0f\u7aef\u7684\u95ee\u9898\uff0c\u5426\u5219\u5bf9\u7aef\u4e3b\u673a\u8bc6\u522b\u51fa\u6765\u7684\u6570\u636e\u53ef\u80fd\u4e0e\u53d1\u9001\u7aef\u60f3\u8981\u53d1\u9001\u7684\u6570\u636e\u662f\u4e0d\u4e00\u81f4\u7684\u3002<\/p>\n\n\n\n

        \u4f8b\u5982\uff0c\u73b0\u5728\u4e24\u53f0\u4e3b\u673a\u4e4b\u95f4\u5728\u8fdb\u884c\u7f51\u7edc\u901a\u4fe1\uff0c\u5176\u4e2d\u53d1\u9001\u7aef\u662f\u5c0f\u7aef\u673a\uff0c\u800c\u63a5\u6536\u7aef\u662f\u5927\u7aef\u673a\u3002\u53d1\u9001\u7aef\u5c06\u53d1\u9001\u7f13\u51b2\u533a\u4e2d\u7684\u6570\u636e\u6309\u5185\u5b58\u5730\u5740\u4ece\u4f4e\u5230\u9ad8\u7684\u987a\u5e8f\u53d1\u51fa\u540e\uff0c\u63a5\u6536\u7aef\u4ece\u7f51\u7edc\u4e2d\u83b7\u53d6\u6570\u636e\u4f9d\u6b21\u4fdd\u5b58\u5728\u63a5\u6536\u7f13\u51b2\u533a\u65f6\uff0c\u4e5f\u662f\u6309\u5185\u5b58\u5730\u5740\u4ece\u4f4e\u5230\u9ad8\u7684\u987a\u5e8f\u4fdd\u5b58\u7684\u3002
        \"img\"<\/p>\n\n\n\n

        \u4f46\u7531\u4e8e\u53d1\u9001\u7aef\u548c\u63a5\u6536\u7aef\u91c7\u7528\u7684\u5206\u522b\u662f\u5c0f\u7aef\u5b58\u50a8\u548c\u5927\u7aef\u5b58\u50a8\uff0c\u6b64\u65f6\u5bf9\u4e8e\u5185\u5b58\u5730\u5740\u4ece\u4f4e\u5230\u9ad8\u4e3a44332211<\/code>\u7684\u5e8f\u5217\uff0c\u53d1\u9001\u7aef\u6309\u5c0f\u7aef\u7684\u65b9\u5f0f\u8bc6\u522b\u51fa\u6765\u662f0x11223344<\/code>\uff0c\u800c\u63a5\u6536\u7aef\u6309\u5927\u7aef\u7684\u65b9\u5f0f\u8bc6\u522b\u51fa\u6765\u662f0x44332211<\/code>\uff0c\u6b64\u65f6\u63a5\u6536\u7aef\u8bc6\u522b\u5230\u7684\u6570\u636e\u4e0e\u53d1\u9001\u7aef\u539f\u672c\u60f3\u8981\u53d1\u9001\u7684\u6570\u636e\u5c31\u4e0d\u4e00\u6837\u4e86\uff0c\u8fd9\u5c31\u662f\u7531\u4e8e\u5927\u5c0f\u7aef\u7684\u504f\u5dee\u5bfc\u81f4\u6570\u636e\u8bc6\u522b\u51fa\u73b0\u4e86\u9519\u8bef\u3002<\/p>\n\n\n\n

        \u7531\u4e8e\u6211\u4eec\u4e0d\u80fd\u4fdd\u8bc1\u901a\u4fe1\u53cc\u65b9\u5b58\u50a8\u6570\u636e\u7684\u65b9\u5f0f\u662f\u4e00\u6837\u7684\uff0c\u56e0\u6b64\u7f51\u7edc\u5f53\u4e2d\u4f20\u8f93\u7684\u6570\u636e\u5fc5\u987b\u8003\u8651\u5927\u5c0f\u7aef\u95ee\u9898\u3002\u56e0\u6b64TCP\/IP\u534f\u8bae\u89c4\u5b9a\uff0c\u7f51\u7edc\u6570\u636e\u6d41\u91c7\u7528\u5927\u7aef\u5b57\u8282\u5e8f\uff0c\u5373\u4f4e\u5730\u5740\u9ad8\u5b57\u8282\u3002\u65e0\u8bba\u662f\u5927\u7aef\u673a\u8fd8\u662f\u5c0f\u7aef\u673a\uff0c\u90fd\u5fc5\u987b\u6309\u7167TCP\/IP\u534f\u8bae\u89c4\u5b9a\u7684\u7f51\u7edc\u5b57\u8282\u5e8f\u6765\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u3002<\/p>\n\n\n\n

          \n
        • \u5982\u679c\u53d1\u9001\u7aef\u662f\u5c0f\u7aef\uff0c\u9700\u8981\u5148\u5c06\u6570\u636e\u8f6c\u6362\u6210\u5927\u7aef\uff0c\u7136\u540e\u518d\u53d1\u9001\u5230\u7f51\u7edc\u5f53\u4e2d\u3002<\/li>\n\n\n\n
        • \u5982\u679c\u53d1\u9001\u7aef\u662f\u5927\u7aef\uff0c\u5219\u53ef\u4ee5\u76f4\u63a5\u8fdb\u884c\u53d1\u9001\u3002<\/li>\n\n\n\n
        • \u5982\u679c\u63a5\u6536\u7aef\u662f\u5c0f\u7aef\uff0c\u9700\u8981\u5148\u5c06\u63a5\u6536\u5230\u6570\u636e\u8f6c\u6362\u6210\u5c0f\u7aef\u540e\u518d\u8fdb\u884c\u6570\u636e\u8bc6\u522b\u3002<\/li>\n\n\n\n
        • \u5982\u679c\u63a5\u6536\u7aef\u662f\u5927\u7aef\uff0c\u5219\u53ef\u4ee5\u76f4\u63a5\u8fdb\u884c\u6570\u636e\u8bc6\u522b\u3002<\/li>\n<\/ul>\n\n\n\n

          \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u7531\u4e8e\u53d1\u9001\u7aef\u662f\u5c0f\u7aef\u673a\uff0c\u56e0\u6b64\u5728\u53d1\u9001\u6570\u636e\u524d\u9700\u8981\u5148\u5c06\u6570\u636e\u8f6c\u6210\u5927\u7aef\uff0c\u7136\u540e\u518d\u53d1\u9001\u5230\u7f51\u7edc\u5f53\u4e2d\uff0c\u800c\u7531\u4e8e\u63a5\u6536\u7aef\u662f\u5927\u7aef\u673a\uff0c\u56e0\u6b64\u63a5\u6536\u7aef\u63a5\u6536\u5230\u6570\u636e\u540e\u53ef\u4ee5\u76f4\u63a5\u8fdb\u884c\u6570\u636e\u8bc6\u522b\uff0c\u6b64\u65f6\u63a5\u6536\u7aef\u8bc6\u522b\u51fa\u6765\u7684\u6570\u636e\u5c31\u4e0e\u53d1\u9001\u7aef\u539f\u672c\u60f3\u8981\u53d1\u9001\u7684\u6570\u636e\u76f8\u540c\u4e86\u3002<\/p>\n\n\n\n

          \"img\"\/<\/div><\/figure>\n\n\n\n

          \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u6240\u6709\u7684\u5927\u5c0f\u7aef\u7684\u8f6c\u5316\u5de5\u4f5c\u662f\u7531\u64cd\u4f5c\u7cfb\u7edf\u6765\u5b8c\u6210\u7684\uff0c\u56e0\u4e3a\u8be5\u64cd\u4f5c\u5c5e\u4e8e\u901a\u4fe1\u7ec6\u8282\uff0c\u4e0d\u8fc7\u4e5f\u6709\u90e8\u5206\u7684\u4fe1\u606f\u9700\u8981\u6211\u4eec\u81ea\u884c\u8fdb\u884c\u5904\u7406\uff0c\u6bd4\u5982\u7aef\u53e3\u53f7\u548cIP\u5730\u5740\u3002<\/p>\n\n\n\n

          \n

          \u4e3a\u4ec0\u4e48\u7f51\u7edc\u5b57\u8282\u5e8f\u91c7\u7528\u7684\u662f\u5927\u7aef\uff1f\u800c\u4e0d\u662f\u5c0f\u7aef\uff1f<\/p>\n<\/blockquote>\n\n\n\n

          \u7f51\u7edc\u5b57\u8282\u5e8f\u91c7\u7528\u7684\u662f\u5927\u7aef\uff0c\u800c\u4e3b\u673a\u5b57\u8282\u5e8f\u4e00\u822c\u91c7\u7528\u7684\u662f\u5c0f\u7aef\uff0c\u90a3\u4e3a\u4ec0\u4e48\u7f51\u7edc\u5b57\u8282\u5e8f\u4e0d\u91c7\u7528\u5c0f\u7aef\u5462\uff1f\u5982\u679c\u7f51\u7edc\u5b57\u8282\u5e8f\u91c7\u7528\u5c0f\u7aef\u7684\u8bdd\uff0c\u53d1\u9001\u7aef\u548c\u63a5\u6536\u7aef\u5728\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u65f6\u5c31\u4e0d\u7528\u8fdb\u884c\u5927\u5c0f\u7aef\u7684\u8f6c\u6362\u4e86\u3002<\/p>\n\n\n\n

          \u8be5\u95ee\u9898\u6709\u5f88\u591a\u4e0d\u540c\u8bf4\u6cd5\uff0c\u4e0b\u9762\u5217\u4e3e\u4e86\u4e24\u79cd\u8bf4\u6cd5\uff1a<\/p>\n\n\n\n

            \n
          • \u8bf4\u6cd5\u4e00\uff1a<\/strong> TCP\u5728Unix\u65f6\u4ee3\u5c31\u6709\u4e86\uff0c\u4ee5\u524dUnix\u673a\u5668\u90fd\u662f\u5927\u7aef\u673a\uff0c\u56e0\u6b64\u7f51\u7edc\u5b57\u8282\u5e8f\u4e5f\u5c31\u91c7\u7528\u7684\u662f\u5927\u7aef\uff0c\u4f46\u4e4b\u540e\u4eba\u4eec\u53d1\u73b0\u7528\u5c0f\u7aef\u80fd\u7b80\u5316\u786c\u4ef6\u8bbe\u8ba1\uff0c\u6240\u4ee5\u73b0\u5728\u4e3b\u6d41\u7684\u90fd\u662f\u5c0f\u7aef\u673a\uff0c\u4f46\u534f\u8bae\u5df2\u7ecf\u4e0d\u597d\u6539\u4e86\u3002<\/li>\n\n\n\n
          • \u8bf4\u6cd5\u4e8c\uff1a<\/strong> \u5927\u7aef\u5e8f\u66f4\u7b26\u5408\u73b0\u4ee3\u4eba\u7684\u8bfb\u5199\u4e60\u60ef\u3002<\/li>\n<\/ul>\n\n\n\n
            \n

            \u7f51\u7edc\u5b57\u8282\u5e8f\u4e0e\u4e3b\u673a\u5b57\u8282\u5e8f\u4e4b\u95f4\u7684\u8f6c\u6362<\/p>\n<\/blockquote>\n\n\n\n

            \u4e3a\u4f7f\u7f51\u7edc\u7a0b\u5e8f\u5177\u6709\u53ef\u79fb\u690d\u6027\uff0c\u4f7f\u540c\u6837\u7684C\u4ee3\u7801\u5728\u5927\u7aef\u548c\u5c0f\u7aef\u8ba1\u7b97\u673a\u4e0a\u7f16\u8bd1\u540e\u90fd\u80fd\u6b63\u5e38\u8fd0\u884c\uff0c\u7cfb\u7edf\u63d0\u4f9b\u4e86\u56db\u4e2a\u51fd\u6570\uff0c\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528\u4ee5\u4e0b\u5e93\u51fd\u6570\u5b9e\u73b0\u7f51\u7edc\u5b57\u8282\u5e8f\u548c\u4e3b\u673a\u5b57\u8282\u5e8f\u4e4b\u95f4\u7684\u8f6c\u6362\u3002<\/p>\n\n\n\n

            #include <arpa\/inet.h>\n\nuint32_t htonl(uint32_t hostlong);\nuint16_t htons(uint16_t hostshort);\nuint32_t ntohl(uint32_t netlong);\nuint16_t ntohs(uint16_t netshort);<\/code><\/pre>\n\n\n\n
              \n
            • \u51fd\u6570\u540d\u5f53\u4e2d\u7684h\u8868\u793ahost\uff0cn\u8868\u793anetwork\uff0cl\u8868\u793a32\u4f4d\u957f\u6574\u6570\uff0cs\u8868\u793a16\u4f4d\u77ed\u6574\u6570\u3002<\/li>\n\n\n\n
            • \u4f8b\u5982htonl\u8868\u793a\u5c0632\u4f4d\u957f\u6574\u6570\u4ece\u4e3b\u673a\u5b57\u8282\u5e8f\u8f6c\u6362\u4e3a\u7f51\u7edc\u5b57\u8282\u5e8f\u3002<\/li>\n\n\n\n
            • \u5982\u679c\u4e3b\u673a\u662f\u5c0f\u7aef\u5b57\u8282\u5e8f\uff0c\u5219\u8fd9\u4e9b\u51fd\u6570\u5c06\u53c2\u6570\u505a\u76f8\u5e94\u7684\u5927\u5c0f\u7aef\u8f6c\u6362\u7136\u540e\u8fd4\u56de\u3002<\/li>\n\n\n\n
            • \u5982\u679c\u4e3b\u673a\u662f\u5927\u7aef\u5b57\u8282\u5e8f\uff0c\u5219\u8fd9\u4e9b\u51fd\u6570\u4e0d\u505a\u4efb\u4f55\u8f6c\u6362\uff0c\u5c06\u53c2\u6570\u539f\u5c01\u4e0d\u52a8\u5730\u8fd4\u56de\u3002<\/li>\n<\/ul>\n\n\n\n
              socket\u7f16\u7a0b\u63a5\u53e3<\/h2>\n\n\n\n
              socket\u5e38\u89c1API<\/h3>\n\n\n\n
              \u521b\u5efa\u5957\u63a5\u5b57\uff1a\uff08TCP\/UDP\uff0c\u5ba2\u6237\u7aef+\u670d\u52a1\u7aef\uff09<\/p>\n\n\n\n
              int socket(int domain, int type, int protocol);<\/code><\/pre>\n\n\n\n
              \u7ed1\u5b9a\u7aef\u53e3\u53f7\uff1a\uff08TCP\/UDP\uff0c\u670d\u52a1\u5668\uff09<\/p>\n\n\n\n
              int bind(int sockfd, const struct sockaddr* addr, socklen_t addrlen);<\/code><\/pre>\n\n\n\n
              \u76d1\u542c\u5957\u63a5\u5b57\uff1a\uff08TCP\uff0c\u670d\u52a1\u5668\uff09<\/p>\n\n\n\n
              int listen(int sockfd, int backlog);<\/code><\/pre>\n\n\n\n
              \u63a5\u53d7\u8bf7\u6c42\uff1a\uff08TCP\uff0c\u670d\u52a1\u5668\uff09<\/p>\n\n\n\n
              int accept(int sockfd, struct sockaddr* addr, socklen_t* addrlen);<\/code><\/pre>\n\n\n\n
              \u5efa\u7acb\u8fde\u63a5\uff1a\uff08TCP\uff0c\u5ba2\u6237\u7aef\uff09<\/p>\n\n\n\n
              int connect(int sockfd, const struct sockaddr* addr, socklen_t addrlen);<\/code><\/pre>\n\n\n\n
              sockaddr\u7ed3\u6784<\/h3>\n\n\n\n
              \n
              sockaddr\u7ed3\u6784\u7684\u51fa\u73b0<\/p>\n<\/blockquote>\n\n\n\n
              \u5957\u63a5\u5b57\u4e0d\u4ec5\u652f\u6301\u8de8\u7f51\u7edc\u7684\u8fdb\u7a0b\u4e4b\u95f4\u901a\u4fe1\uff0c\u8fd8\u652f\u6301\u672c\u5730\u7684\u8fdb\u7a0b\u95f4\u901a\u4fe1\uff08\u57df\u95f4\u5957\u63a5\u5b57\uff09\u3002\u5728\u8fdb\u884c\u8de8\u7f51\u7edc\u901a\u4fe1\u65f6\u6211\u4eec\u9700\u8981\u4f20\u9012\u7684\u7aef\u53e3\u53f7\u548cIP\u5730\u5740\uff0c\u5219\u672c\u5730\u901a\u4fe1\u5219\u4e0d\u9700\u8981\uff0c\u56e0\u6b64\u5957\u63a5\u5b57\u63d0\u4f9b\u4e86sockaddr_in<\/code>\u7ed3\u6784\u4f53\u548csockaddr_un<\/code>\u7ed3\u6784\u4f53\uff0c\u5176\u4e2dsockaddr_in<\/code>\u7ed3\u6784\u4f53\u662f\u7528\u4e8e\u8de8\u7f51\u7edc\u901a\u4fe1\u7684\uff0c\u800csockaddr_un<\/code>\u7ed3\u6784\u4f53\u662f\u7528\u4e8e\u672c\u5730\u901a\u4fe1\u7684\u3002<\/p>\n\n\n\n
              \u4e3a\u4e86\u8ba9\u5957\u63a5\u5b57\u7684\u7f51\u7edc\u901a\u4fe1\u548c\u672c\u5730\u901a\u4fe1\u80fd\u591f\u4f7f\u7528\u540c\u4e00\u5957\u51fd\u6570\u63a5\u53e3\uff0c\u4e8e\u662f\u5c31\u51fa\u73b0\u4e86sockaddr<\/code>\u7ed3\u6784\u4f53\uff0c\u8be5\u7ed3\u6784\u4f53\u4e0esockaddr_in<\/code>\u548csockaddr_un<\/code>\u7684\u7ed3\u6784\u90fd\u4e0d\u76f8\u540c\uff0c\u4f46\u8fd9\u4e09\u4e2a\u7ed3\u6784\u4f53\u5934\u90e8\u768416\u4e2a\u6bd4\u7279\u4f4d\u90fd\u662f\u4e00\u6837\u7684\uff0c\u8fd9\u4e2a\u5b57\u6bb5\u53eb\u505a\u534f\u8bae\u5bb6\u65cf\u3002<\/p>\n\n\n\n
              \"img\"\/<\/div><\/figure>\n\n\n\n
              \u6b64\u65f6\u5f53\u6211\u4eec\u5728\u4f20\u9012\u5728\u4f20\u53c2\u65f6\uff0c\u5c31\u4e0d\u7528\u4f20\u5165sockaddr_in<\/code>\u6216sockaddr_un<\/code>\u8fd9\u6837\u7684\u7ed3\u6784\u4f53\uff0c\u800c\u7edf\u4e00\u4f20\u5165sockaddr<\/code>\u8fd9\u6837\u7684\u7ed3\u6784\u4f53\u3002\u5728\u8bbe\u7f6e\u53c2\u6570\u65f6\u5c31\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u534f\u8bae\u5bb6\u65cf\u8fd9\u4e2a\u5b57\u6bb5\uff0c\u6765\u8868\u660e\u6211\u4eec\u662f\u8981\u8fdb\u884c\u7f51\u7edc\u901a\u4fe1\u8fd8\u662f\u672c\u5730\u901a\u4fe1\uff0c\u5728\u8fd9\u4e9bAPI\u5185\u90e8\u5c31\u53ef\u4ee5\u63d0\u53d6sockaddr<\/code>\u7ed3\u6784\u5934\u90e8\u768416\u4f4d\u8fdb\u884c\u8bc6\u522b\uff0c\u8fdb\u800c\u5f97\u51fa\u6211\u4eec\u662f\u8981\u8fdb\u884c\u7f51\u7edc\u901a\u4fe1\u8fd8\u662f\u672c\u5730\u901a\u4fe1\uff0c\u7136\u540e\u6267\u884c\u5bf9\u5e94\u7684\u64cd\u4f5c\u3002\u6b64\u65f6\u6211\u4eec\u5c31\u901a\u8fc7\u901a\u7528sockaddr<\/code>\u7ed3\u6784\uff0c\u5c06\u5957\u63a5\u5b57\u7f51\u7edc\u901a\u4fe1\u548c\u672c\u5730\u901a\u4fe1\u7684\u53c2\u6570\u7c7b\u578b\u8fdb\u884c\u4e86\u7edf\u4e00\u3002<\/p>\n\n\n\n
              \u6ce8\u610f\uff1a<\/strong> \u5b9e\u9645\u6211\u4eec\u5728\u8fdb\u884c\u7f51\u7edc\u901a\u4fe1\u65f6\uff0c\u5b9a\u4e49\u7684\u8fd8\u662fsockaddr_in<\/code>\u8fd9\u6837\u7684\u7ed3\u6784\u4f53\uff0c\u53ea\u4e0d\u8fc7\u5728\u4f20\u53c2\u65f6\u9700\u8981\u5c06\u8be5\u7ed3\u6784\u4f53\u7684\u5730\u5740\u7c7b\u578b\u8fdb\u884c\u5f3a\u8f6c\u4e3asockaddr*<\/code>\u7f62\u4e86\u3002<\/p>\n\n\n\n
              \n
              \u4e3a\u4ec0\u4e48\u4f1a\u6709\u8fd9\u4e48\u591a\u672c\u5730\u8fdb\u7a0b\u95f4\u901a\u4fe1\u7684\u65b9\u5f0f\uff1f<\/p>\n<\/blockquote>\n\n\n\n
              \u672c\u5730\u8fdb\u7a0b\u95f4\u901a\u4fe1\u7684\u65b9\u5f0f\u5df2\u7ecf\u6709\u7ba1\u9053\u3001\u6d88\u606f\u961f\u5217\u3001\u5171\u4eab\u5185\u5b58\u3001\u4fe1\u53f7\u91cf\u7b49\u65b9\u5f0f\u4e86\uff0c\u73b0\u5728\u5728\u5957\u63a5\u5b57\u8fd9\u91cc\u53c8\u51fa\u73b0\u4e86\u53ef\u4ee5\u7528\u4e8e\u672c\u5730\u8fdb\u7a0b\u95f4\u901a\u4fe1\u7684\u57df\u95f4\u5957\u63a5\u5b57\uff0c\u4e3a\u4ec0\u4e48\u4f1a\u6709\u8fd9\u4e48\u591a\u901a\u4fe1\u65b9\u5f0f\uff0c\u5e76\u4e14\u8fd9\u4e9b\u901a\u4fe1\u65b9\u5f0f\u597d\u50cf\u5e76\u4e0d\u76f8\u5173\uff1f<\/p>\n\n\n\n
              \u5b9e\u9645\u662f\u56e0\u4e3a\u65e9\u671f\u6709\u5f88\u591a\u4e0d\u540c\u7684\u5b9e\u9a8c\u5ba4\u90fd\u5728\u7814\u7a76\u901a\u4fe1\u7684\u65b9\u5f0f\uff0c\u7531\u4e8e\u662f\u4e0d\u540c\u7684\u5b9e\u9a8c\u5ba4\uff0c\u56e0\u6b64\u5c31\u51fa\u73b0\u4e86\u5f88\u591a\u4e0d\u540c\u7684\u901a\u4fe1\u65b9\u5f0f\uff0c\u6bd4\u5982\u5e38\u89c1\u7684\u6709System V\u6807\u51c6\u7684\u901a\u4fe1\u65b9\u5f0f\u548cPOSIX\u6807\u51c6\u7684\u901a\u4fe1\u65b9\u5f0f\u3002<\/p>\n\n\n\n
                \n
              • IPv4\u548cIPv6\u7684\u5730\u5740\u683c\u5f0f\u5b9a\u4e49\u5728netinet\/in.h\u4e2d\uff0cIPv4\u5730\u5740\u7528sockaddr_in\u7ed3\u6784\u4f53\u8868\u793a\uff0c\u5305\u62ec16\u4f4d\u5730\u5740\u7c7b\u578b\uff0c16\u4f4d\u7aef\u53e3\u53f7\u548c32\u4f4dIP\u5730\u5740\u3002<\/li>\n\n\n\n
              • IPv4\u3001IPv6\u5730\u5740\u7c7b\u578b\u5206\u522b\u5b9a\u4e49\u4e3a\u5e38\u6570AF_INET\u3001AF_INET6\u3002\u8fd9\u6837\uff0c\u53ea\u8981\u53d6\u5f97\u67d0\u79cdsockaddr\u7ed3\u6784\u4f53\u7684\u9996\u5730\u5740\uff0c\u4e0d\u9700\u8981\u77e5\u9053\u5177\u4f53\u662f\u54ea\u79cd\u7c7b\u578b\u7684sockaddr\u7ed3\u6784\u4f53\uff0c\u5c31\u53ef\u4ee5\u6839\u636e\u5730\u5740\u7c7b\u578b\u5b57\u6bb5\u786e\u5b9a\u7ed3\u6784\u4f53\u4e2d\u7684\u5185\u5bb9\u3002<\/li>\n\n\n\n
              • socket API\u53ef\u4ee5\u90fd\u7528struct sockaddr* \u7c7b\u578b\u8868\u793a\uff0c\u5728\u4f7f\u7528\u7684\u65f6\u5019\u9700\u8981\u5f3a\u5236\u8f6c\u5316\u6210sockaddr_in\uff1b\u8fd9\u6837\u7684\u597d\u5904\u662f\u7a0b\u5e8f\u7684\u901a\u7528\u6027\uff0c\u53ef\u4ee5\u63a5\u6536IPv4\u3001IPv6\uff0c\u4ee5\u53caUNIX Domain Socket\u5404\u79cd\u7c7b\u578b\u7684sockaddr\u7ed3\u6784\u4f53\u6307\u9488\u505a\u4e3a\u53c2\u6570\u3002<\/li>\n<\/ul>\n\n\n\n
                \n
                \u4e3a\u4ec0\u4e48\u6ca1\u6709\u7528void*<\/code>\u4ee3\u66ffstruct sockaddr*<\/code>\u7c7b\u578b<\/p>\n<\/blockquote>\n\n\n\n
                \u6211\u4eec\u53ef\u4ee5\u5c06\u8fd9\u4e9b\u51fd\u6570\u7684struct sockaddr*<\/code>\u53c2\u6570\u7c7b\u578b\u6539\u4e3avoid*<\/code>\uff0c\u6b64\u65f6\u5728\u51fd\u6570\u5185\u90e8\u4e5f\u53ef\u4ee5\u76f4\u63a5\u6307\u5b9a\u63d0\u53d6\u5934\u90e8\u768416\u4e2a\u6bd4\u7279\u4f4d\u8fdb\u884c\u8bc6\u522b\uff0c\u6700\u7ec8\u4e5f\u80fd\u591f\u5224\u65ad\u662f\u9700\u8981\u8fdb\u884c\u7f51\u7edc\u901a\u4fe1\u8fd8\u662f\u672c\u5730\u901a\u4fe1\uff0c\u90a3\u4e3a\u4ec0\u4e48\u8fd8\u8981\u8bbe\u8ba1\u51fasockaddr<\/code>\u8fd9\u6837\u7684\u7ed3\u6784\u5462\uff1f<\/p>\n\n\n\n
                \u5b9e\u9645\u5728\u8bbe\u8ba1\u8fd9\u4e00\u5957\u7f51\u7edc\u63a5\u53e3\u7684\u65f6\u5019C\u8bed\u8a00\u8fd8\u4e0d\u652f\u6301void\uff0c\u4e8e\u662f\u5c31\u8bbe\u8ba1\u51fa\u4e86sockaddr\u8fd9\u6837\u7684\u89e3\u51b3\u65b9\u6848\u3002\u5e76\u4e14\u5728C\u8bed\u8a00\u652f\u6301\u4e86void<\/em>\u4e4b\u540e\u4e5f\u6ca1\u6709\u5c06\u5b83\u6539\u56de\u6765\uff0c\u56e0\u4e3a\u8fd9\u4e9b\u63a5\u53e3\u662f\u7cfb\u7edf\u63a5\u53e3\uff0c\u7cfb\u7edf\u63a5\u53e3\u662f\u6240\u6709\u4e0a\u5c42\u8f6f\u4ef6\u63a5\u53e3\u7684\u57fa\u77f3\uff0c\u7cfb\u7edf\u63a5\u53e3\u662f\u4e0d\u80fd\u8f7b\u6613\u66f4\u6539\u7684\uff0c\u5426\u5219\u5f15\u53d1\u7684\u540e\u679c\u662f\u4e0d\u53ef\u60f3\u7684\uff0c\u8fd9\u4e5f\u5c31\u662f\u4e3a\u4ec0\u4e48\u73b0\u5728\u4f9d\u65e7\u4fdd\u7559sockaddr\u7ed3\u6784\u7684\u539f\u56e0\u3002<\/p>\n\n\n\n
                \u7b80\u5355\u7684UDP\u7f51\u7edc\u7a0b\u5e8f<\/h2>\n\n\n\n
                \u670d\u52a1\u7aef\u521b\u5efa\u5957\u63a5\u5b57<\/h3>\n\n\n\n
                \u6211\u4eec\u628a\u670d\u52a1\u5668\u5c01\u88c5\u6210\u4e00\u4e2a\u7c7b\uff0c\u5f53\u6211\u4eec\u5b9a\u4e49\u51fa\u4e00\u4e2a\u670d\u52a1\u5668\u5bf9\u8c61\u540e\u9700\u8981\u9a6c\u4e0a\u521d\u59cb\u5316\u670d\u52a1\u5668\uff0c\u800c\u521d\u59cb\u5316\u670d\u52a1\u5668\u9700\u8981\u505a\u7684\u7b2c\u4e00\u4ef6\u4e8b\u5c31\u662f\u521b\u5efa\u5957\u63a5\u5b57\u3002<\/p>\n\n\n\n
                \n
                socket\u51fd\u6570<\/p>\n<\/blockquote>\n\n\n\n
                \u521b\u5efa\u5957\u63a5\u5b57\u7684\u51fd\u6570\u53eb\u505asocket\uff0c\u8be5\u51fd\u6570\u7684\u51fd\u6570\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                int socket(int domain, int type, int protocol);<\/code><\/pre>\n\n\n\n
                \u53c2\u6570\u8bf4\u660e\uff1a<\/p>\n\n\n\n
                  \n
                • domain\uff1a\u521b\u5efa\u5957\u63a5\u5b57\u7684\u57df\u6216\u8005\u53eb\u505a\u534f\u8bae\u5bb6\u65cf\uff0c\u4e5f\u5c31\u662f\u521b\u5efa\u5957\u63a5\u5b57\u7684\u7c7b\u578b\u3002\u8be5\u53c2\u6570\u5c31\u76f8\u5f53\u4e8estruct sockaddr<\/code>\u7ed3\u6784\u7684\u524d16\u4e2a\u4f4d\u3002\u5982\u679c\u662f\u672c\u5730\u901a\u4fe1\u5c31\u8bbe\u7f6e\u4e3aAF_UNIX<\/code>\uff0c\u5982\u679c\u662f\u7f51\u7edc\u901a\u4fe1\u5c31\u8bbe\u7f6e\u4e3aAF_INET<\/code>\uff08IPv4\uff09\u6216AF_INET6<\/code>\uff08IPv6\uff09\u3002<\/li>\n\n\n\n
                • type\uff1a\u521b\u5efa\u5957\u63a5\u5b57\u65f6\u6240\u9700\u7684\u670d\u52a1\u7c7b\u578b\u3002\u5176\u4e2d\u6700\u5e38\u89c1\u7684\u670d\u52a1\u7c7b\u578b\u662fSOCK_STREAM<\/code>\u548cSOCK_DGRAM<\/code>\uff0c\u5982\u679c\u662f\u57fa\u4e8eUDP\u7684\u7f51\u7edc\u901a\u4fe1\uff0c\u6211\u4eec\u91c7\u7528\u7684\u5c31\u662fSOCK_DGRAM<\/code>\uff0c\u53eb\u505a\u7528\u6237\u6570\u636e\u62a5\u670d\u52a1\uff0c\u5982\u679c\u662f\u57fa\u4e8eTCP\u7684\u7f51\u7edc\u901a\u4fe1\uff0c\u6211\u4eec\u91c7\u7528\u7684\u5c31\u662fSOCK_STREAM<\/code>\uff0c\u53eb\u505a\u6d41\u5f0f\u5957\u63a5\u5b57\uff0c\u63d0\u4f9b\u7684\u662f\u6d41\u5f0f\u670d\u52a1\u3002<\/li>\n\n\n\n
                • protocol\uff1a\u521b\u5efa\u5957\u63a5\u5b57\u7684\u534f\u8bae\u7c7b\u578b\u3002\u4f60\u53ef\u4ee5\u6307\u660e\u4e3aTCP\u6216UDP\uff0c\u4f46\u8be5\u5b57\u6bb5\u4e00\u822c\u76f4\u63a5\u8bbe\u7f6e\u4e3a0\u5c31\u53ef\u4ee5\u4e86\uff0c\u8bbe\u7f6e\u4e3a0\u8868\u793a\u7684\u5c31\u662f\u9ed8\u8ba4\uff0c\u6b64\u65f6\u4f1a\u6839\u636e\u4f20\u5165\u7684\u524d\u4e24\u4e2a\u53c2\u6570\u81ea\u52a8\u63a8\u5bfc\u51fa\u4f60\u6700\u7ec8\u9700\u8981\u4f7f\u7528\u7684\u662f\u54ea\u79cd\u534f\u8bae\u3002<\/li>\n<\/ul>\n\n\n\n
                  \u8fd4\u56de\u503c\u8bf4\u660e\uff1a<\/p>\n\n\n\n
                    \n
                  • \u5957\u63a5\u5b57\u521b\u5efa\u6210\u529f\u8fd4\u56de\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0c\u521b\u5efa\u5931\u8d25\u8fd4\u56de-1\uff0c\u540c\u65f6\u9519\u8bef\u7801\u4f1a\u88ab\u8bbe\u7f6e\u3002<\/li>\n<\/ul>\n\n\n\n
                    \n
                    socket\u51fd\u6570\u5c5e\u4e8e\u4ec0\u4e48\u7c7b\u578b\u7684\u63a5\u53e3\uff1f<\/p>\n<\/blockquote>\n\n\n\n
                    \u7f51\u7edc\u534f\u8bae\u6808\u662f\u5206\u5c42\u7684\uff0c\u6309\u7167TCP\/IP\u56db\u5c42\u6a21\u578b\u6765\u8bf4\uff0c\u81ea\u9876\u5411\u4e0b\u4f9d\u6b21\u662f\u5e94\u7528\u5c42\u3001\u4f20\u8f93\u5c42\u3001\u7f51\u7edc\u5c42\u548c\u6570\u636e\u94fe\u8def\u5c42\u3002\u800c\u6211\u4eec\u73b0\u5728\u6240\u5199\u7684\u4ee3\u7801\u90fd\u53eb\u505a\u7528\u6237\u7ea7\u4ee3\u7801\uff0c\u4e5f\u5c31\u662f\u8bf4\u6211\u4eec\u662f\u5728\u5e94\u7528\u5c42\u7f16\u5199\u4ee3\u7801\uff0c\u56e0\u6b64\u6211\u4eec\u8c03\u7528\u7684\u5b9e\u9645\u662f\u4e0b\u4e09\u5c42\u7684\u63a5\u53e3\uff0c\u800c\u4f20\u8f93\u5c42\u548c\u7f51\u7edc\u5c42\u90fd\u662f\u5728\u64cd\u4f5c\u7cfb\u7edf\u5185\u5b8c\u6210\u7684\uff0c\u4e5f\u5c31\u610f\u5473\u7740\u6211\u4eec\u5728\u5e94\u7528\u5c42\u8c03\u7528\u7684\u63a5\u53e3\u90fd\u53eb\u505a\u7cfb\u7edf\u8c03\u7528\u63a5\u53e3\u3002<\/p>\n\n\n\n
                    \n
                    socket\u51fd\u6570\u662f\u88ab\u8c01\u8c03\u7528\u7684\uff1f<\/p>\n<\/blockquote>\n\n\n\n
                    socket\u8fd9\u4e2a\u51fd\u6570\u662f\u88ab\u7a0b\u5e8f\u8c03\u7528\u7684\uff0c\u4f46\u5e76\u4e0d\u662f\u88ab\u7a0b\u5e8f\u5728\u7f16\u7801\u4e0a\u76f4\u63a5\u8c03\u7528\u7684\uff0c\u800c\u662f\u7a0b\u5e8f\u7f16\u7801\u5f62\u6210\u7684\u53ef\u6267\u884c\u7a0b\u5e8f\u8fd0\u884c\u8d77\u6765\u53d8\u6210\u8fdb\u7a0b\uff0c\u5f53\u8fd9\u4e2a\u8fdb\u7a0b\u88abCPU\u8c03\u5ea6\u6267\u884c\u5230socket\u51fd\u6570\u65f6\uff0c\u7136\u540e\u624d\u4f1a\u6267\u884c\u521b\u5efa\u5957\u63a5\u5b57\u7684\u4ee3\u7801\uff0c\u4e5f\u5c31\u662f\u8bf4socket\u51fd\u6570\u662f\u88ab\u8fdb\u7a0b\u6240\u8c03\u7528\u7684\u3002<\/p>\n\n\n\n
                    \n
                    socket\u51fd\u6570\u5e95\u5c42\u505a\u4e86\u4ec0\u4e48\uff1f<\/p>\n<\/blockquote>\n\n\n\n
                    socket\u51fd\u6570\u662f\u88ab\u8fdb\u7a0b\u8c03\u7528\u7684\uff0c\u800c\u6bcf\u4e00\u4e2a\u8fdb\u7a0b\u5728\u7cfb\u7edf\u5c42\u9762\u4e0a\u90fd\u6709\u4e00\u4e2a\u8fdb\u7a0b\u5730\u5740\u7a7a\u95f4PCB\uff08task_struct<\/code>\uff09\u3001\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868\uff08files_struct<\/code>\uff09\u4ee5\u53ca\u5bf9\u5e94\u6253\u5f00\u7684\u5404\u79cd\u6587\u4ef6\u3002\u800c\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868\u91cc\u9762\u5305\u542b\u4e86\u4e00\u4e2a\u6570\u7ec4fd_array<\/code>\uff0c\u5176\u4e2d\u6570\u7ec4\u4e2d\u76840\u30011\u30012\u4e0b\u6807\u4f9d\u6b21\u5bf9\u5e94\u7684\u5c31\u662f\u6807\u51c6\u8f93\u5165\u3001\u6807\u51c6\u8f93\u51fa\u4ee5\u53ca\u6807\u51c6\u9519\u8bef\u3002<\/p>\n\n\n\n
                    \"img\"\/<\/div><\/figure>\n\n\n\n
                    \u5f53\u6211\u4eec\u8c03\u7528socket\u51fd\u6570\u521b\u5efa\u5957\u63a5\u5b57\u65f6\uff0c\u5b9e\u9645\u76f8\u5f53\u4e8e\u6211\u4eec\u6253\u5f00\u4e86\u4e00\u4e2a\u201c\u7f51\u7edc\u6587\u4ef6\u201d\uff0c\u6253\u5f00\u540e\u5728\u5185\u6838\u5c42\u9762\u4e0a\u5c31\u5f62\u6210\u4e86\u4e00\u4e2a\u5bf9\u5e94\u7684struct file<\/code>\u7ed3\u6784\u4f53\uff0c\u540c\u65f6\u8be5\u7ed3\u6784\u4f53\u88ab\u8fde\u5165\u5230\u8be5\u8fdb\u7a0b\u5bf9\u5e94\u7684\u6587\u4ef6\u53cc\u94fe\u8868\uff0c\u5e76\u5c06\u8be5\u7ed3\u6784\u4f53\u7684\u9996\u5730\u5740\u586b\u5165\u5230\u4e86fd_array<\/code>\u6570\u7ec4\u5f53\u4e2d\u4e0b\u6807\u4e3a3\u7684\u4f4d\u7f6e\uff0c\u6b64\u65f6fd_array<\/code>\u6570\u7ec4\u4e2d\u4e0b\u6807\u4e3a3\u7684\u6307\u9488\u5c31\u6307\u5411\u4e86\u8fd9\u4e2a\u6253\u5f00\u7684\u201c\u7f51\u7edc\u6587\u4ef6\u201d\uff0c\u6700\u540e3\u53f7\u6587\u4ef6\u63cf\u8ff0\u7b26\u4f5c\u4e3asocket\u51fd\u6570\u7684\u8fd4\u56de\u503c\u8fd4\u56de\u7ed9\u4e86\u7528\u6237\u3002<\/p>\n\n\n\n
                    \"img\"\/<\/div><\/figure>\n\n\n\n
                    \u5176\u4e2d\u6bcf\u4e00\u4e2astruct file<\/code>\u7ed3\u6784\u4f53\u4e2d\u5305\u542b\u7684\u5c31\u662f\u5bf9\u5e94\u6253\u5f00\u6587\u4ef6\u5404\u79cd\u4fe1\u606f\uff0c\u6bd4\u5982\u6587\u4ef6\u7684\u5c5e\u6027\u4fe1\u606f\u3001\u64cd\u4f5c\u65b9\u6cd5\u4ee5\u53ca\u6587\u4ef6\u7f13\u51b2\u533a\u7b49\u3002\u5176\u4e2d\u6587\u4ef6\u5bf9\u5e94\u7684\u5c5e\u6027\u5728\u5185\u6838\u5f53\u4e2d\u662f\u7531struct inode<\/code>\u7ed3\u6784\u4f53\u6765\u7ef4\u62a4\u7684\uff0c\u800c\u6587\u4ef6\u5bf9\u5e94\u7684\u64cd\u4f5c\u65b9\u6cd5\u5b9e\u9645\u5c31\u662f\u4e00\u5806\u7684\u51fd\u6570\u6307\u9488\uff08\u6bd4\u5982read*<\/code>\u548cwrite*<\/code>\uff09\u5728\u5185\u6838\u5f53\u4e2d\u5c31\u662f\u7531struct file_operations<\/code>\u7ed3\u6784\u4f53\u6765\u7ef4\u62a4\u7684\u3002\u800c\u6587\u4ef6\u7f13\u51b2\u533a\u5bf9\u4e8e\u6253\u5f00\u7684\u666e\u901a\u6587\u4ef6\u6765\u8bf4\u5bf9\u5e94\u7684\u4e00\u822c\u662f\u78c1\u76d8\uff0c\u4f46\u5bf9\u4e8e\u73b0\u5728\u6253\u5f00\u7684\u201c\u7f51\u7edc\u6587\u4ef6\u201d\u6765\u8bf4\uff0c\u8fd9\u91cc\u7684\u6587\u4ef6\u7f13\u51b2\u533a\u5bf9\u5e94\u7684\u5c31\u662f\u7f51\u5361\u3002<\/p>\n\n\n\n
                    \"img\"\/<\/div><\/figure>\n\n\n\n
                    \u5bf9\u4e8e\u4e00\u822c\u7684\u666e\u901a\u6587\u4ef6\u6765\u8bf4\uff0c\u5f53\u7528\u6237\u901a\u8fc7\u6587\u4ef6\u63cf\u8ff0\u7b26\u5c06\u6570\u636e\u5199\u5230\u6587\u4ef6\u7f13\u51b2\u533a\uff0c\u7136\u540e\u518d\u628a\u6570\u636e\u5237\u5230\u78c1\u76d8\u4e0a\u5c31\u5b8c\u6210\u4e86\u6570\u636e\u7684\u5199\u5165\u64cd\u4f5c\u3002\u800c\u5bf9\u4e8e\u73b0\u5728socket\u51fd\u6570\u6253\u5f00\u7684\u201c\u7f51\u7edc\u6587\u4ef6\u201d\u6765\u8bf4\uff0c\u5f53\u7528\u6237\u5c06\u6570\u636e\u5199\u5230\u6587\u4ef6\u7f13\u51b2\u533a\u540e\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u5b9a\u671f\u5c06\u6570\u636e\u5237\u5230\u7f51\u5361\u91cc\u9762\uff0c\u800c\u7f51\u5361\u5219\u662f\u8d1f\u8d23\u6570\u636e\u53d1\u9001\u7684\uff0c\u56e0\u6b64\u6570\u636e\u6700\u7ec8\u5c31\u53d1\u9001\u5230\u4e86\u7f51\u7edc\u5f53\u4e2d\u3002<\/p>\n\n\n\n
                    \n
                    \u670d\u52a1\u7aef\u521b\u5efa\u5957\u63a5\u5b57<\/p>\n<\/blockquote>\n\n\n\n
                    \u5f53\u6211\u4eec\u5728\u8fdb\u884c\u521d\u59cb\u5316\u670d\u52a1\u5668\u521b\u5efa\u5957\u63a5\u5b57\u65f6\uff0c\u5c31\u662f\u8c03\u7528socket\u51fd\u6570\u521b\u5efa\u5957\u63a5\u5b57\uff0c\u521b\u5efa\u5957\u63a5\u5b57\u65f6\u6211\u4eec\u9700\u8981\u586b\u5165\u7684\u534f\u8bae\u5bb6\u65cf\u5c31\u662fAF_INET<\/code>\uff0c\u56e0\u4e3a\u6211\u4eec\u8981\u8fdb\u884c\u7684\u662f\u7f51\u7edc\u901a\u4fe1\uff0c\u800c\u6211\u4eec\u9700\u8981\u7684\u670d\u52a1\u7c7b\u578b\u5c31\u662fSOCK_DGRAM<\/code>\uff0c\u56e0\u4e3a\u6211\u4eec\u73b0\u5728\u7f16\u5199\u7684UDP\u670d\u52a1\u5668\u662f\u9762\u5411\u6570\u636e\u62a5\u7684\uff0c\u800c\u7b2c\u4e09\u4e2a\u53c2\u6570\u76f4\u63a5\u8bbe\u7f6e\u4e3a0\u5373\u53ef\u3002<\/p>\n\n\n\n
                    class UdpServer\n{\npublic:\n    bool InitServer()\n    {\n        \/\/\u521b\u5efa\u5957\u63a5\u5b57\n        _sockfd = socket(AF_INET, SOCK_DGRAM, 0);\n        if (_sockfd < 0){ \/\/\u521b\u5efa\u5957\u63a5\u5b57\u5931\u8d25\n            std::cerr << \"socket error\" << std::endl;\n            return false;\n        }\n\n        std::cout << \"socket create success, sockfd: \" << _sockfd << std::endl;\n\n        return true;\n    }\n    ~UdpServer()\n    {\n        if (_sockfd >= 0){\n            close(_sockfd);\n        }\n    };\nprivate:\n    int _sockfd; \/\/\u6587\u4ef6\u63cf\u8ff0\u7b26\n};<\/code><\/pre>\n\n\n\n
                    \u6ce8\u610f\uff1a<\/strong> \u5f53\u6790\u6784\u670d\u52a1\u5668\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06sockfd\u5bf9\u5e94\u7684\u6587\u4ef6\u8fdb\u884c\u5173\u95ed\uff0c\u4f46\u5b9e\u9645\u4e0a\u4e0d\u8fdb\u884c\u8be5\u64cd\u4f5c\u4e5f\u884c\uff0c\u56e0\u4e3a\u4e00\u822c\u670d\u52a1\u5668\u8fd0\u884c\u540e\u662f\u5c31\u4e0d\u4f1a\u505c\u4e0b\u6765\u7684\u3002<\/p>\n\n\n\n
                    \u8fd9\u91cc\u6211\u4eec\u53ef\u4ee5\u505a\u4e00\u4e2a\u7b80\u5355\u7684\u6d4b\u8bd5\uff0c\u770b\u770b\u5957\u63a5\u5b57\u662f\u5426\u521b\u5efa\u6210\u529f\u3002<\/p>\n\n\n\n
                    int main()\n{\n    UdpServer* svr = new UdpServer();\n    svr->InitServer();\n    return 0;\n}<\/code><\/pre>\n\n\n\n
                    \u8fd0\u884c\u7a0b\u5e8f\u540e\u53ef\u4ee5\u770b\u5230\u5957\u63a5\u5b57\u662f\u521b\u5efa\u6210\u529f\u7684\uff0c\u5bf9\u5e94\u83b7\u53d6\u5230\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u5c31\u662f3\uff0c\u8fd9\u4e5f\u5f88\u597d\u7406\u89e3\uff0c\u56e0\u4e3a0\u30011\u30012\u9ed8\u8ba4\u88ab\u6807\u51c6\u8f93\u5165\u6d41\u3001\u6807\u51c6\u8f93\u51fa\u6d41\u548c\u6807\u51c6\u9519\u8bef\u6d41\u5360\u7528\u4e86\uff0c\u6b64\u65f6\u6700\u5c0f\u7684\u3001\u672a\u88ab\u5229\u7528\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u5c31\u662f3\u3002<\/p>\n\n\n\n
                    \"img\"\/<\/div><\/figure>\n\n\n\n
                    \u670d\u52a1\u7aef\u7ed1\u5b9a<\/h3>\n\n\n\n
                    \u73b0\u5728\u5957\u63a5\u5b57\u5df2\u7ecf\u521b\u5efa\u6210\u529f\u4e86\uff0c\u4f46\u4f5c\u4e3a\u4e00\u6b3e\u670d\u52a1\u5668\u6765\u8bb2\uff0c\u5982\u679c\u53ea\u662f\u628a\u5957\u63a5\u5b57\u521b\u5efa\u597d\u4e86\uff0c\u90a3\u6211\u4eec\u4e5f\u53ea\u662f\u5728\u7cfb\u7edf\u5c42\u9762\u4e0a\u6253\u5f00\u4e86\u4e00\u4e2a\u6587\u4ef6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u5c06\u6765\u5e76\u4e0d\u77e5\u9053\u662f\u8981\u5c06\u6570\u636e\u5199\u5165\u5230\u78c1\u76d8\u8fd8\u662f\u5237\u5230\u7f51\u5361\uff0c\u6b64\u65f6\u8be5\u6587\u4ef6\u8fd8\u6ca1\u6709\u4e0e\u7f51\u7edc\u5173\u8054\u8d77\u6765\u3002<\/p>\n\n\n\n
                    \"img\"\/<\/div><\/figure>\n\n\n\n
                    \u7531\u4e8e\u73b0\u5728\u7f16\u5199\u7684\u662f\u4e0d\u9762\u5411\u8fde\u63a5\u7684UDP\u670d\u52a1\u5668\uff0c\u6240\u4ee5\u521d\u59cb\u5316\u670d\u52a1\u5668\u8981\u505a\u7684\u7b2c\u4e8c\u4ef6\u4e8b\u5c31\u662f\u7ed1\u5b9a\u3002<\/p>\n\n\n\n
                    \n
                    bind\u51fd\u6570<\/p>\n<\/blockquote>\n\n\n\n
                    \u7ed1\u5b9a\u7684\u51fd\u6570\u53eb\u505abind\uff0c\u8be5\u51fd\u6570\u7684\u51fd\u6570\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                    int bind(int sockfd, const struct sockaddr* addr, socklen_t addrlen);<\/code><\/pre>\n\n\n\n
                    \u53c2\u6570\u8bf4\u660e\uff1a<\/strong><\/p>\n\n\n\n
                      \n
                    • sockfd\uff1a\u7ed1\u5b9a\u7684\u6587\u4ef6\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002\u4e5f\u5c31\u662f\u6211\u4eec\u521b\u5efa\u5957\u63a5\u5b57\u65f6\u83b7\u53d6\u5230\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002<\/li>\n\n\n\n
                    • addr\uff1a\u7f51\u7edc\u76f8\u5173\u5c5e\u6027\uff0c\u5305\u62ec\u534f\u8bae\u5bb6\u65cf\u3001IP\u5730\u5740\u3001\u7aef\u53e3\u53f7\u7b49\u3002<\/li>\n\n\n\n
                    • addrlen\uff1a\u4f20\u5165\u7684addr\u7ed3\u6784\u4f53\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n\n\n\n
                      \u8fd4\u56de\u503c\u8bf4\u660e\uff1a<\/p>\n\n\n\n
                        \n
                      • \u7ed1\u5b9a\u6210\u529f\u8fd4\u56de0\uff0c\u7ed1\u5b9a\u5931\u8d25\u8fd4\u56de-1\uff0c\u540c\u65f6\u9519\u8bef\u7801\u4f1a\u88ab\u8bbe\u7f6e\u3002<\/li>\n<\/ul>\n\n\n\n
                        \n
                        struct sockaddr_in\u7ed3\u6784\u4f53<\/p>\n<\/blockquote>\n\n\n\n
                        \u5728\u7ed1\u5b9a\u65f6\u9700\u8981\u5c06\u7f51\u7edc\u76f8\u5173\u7684\u5c5e\u6027\u4fe1\u606f\u586b\u5145\u5230\u4e00\u4e2a\u7ed3\u6784\u4f53\u5f53\u4e2d\uff0c\u7136\u540e\u5c06\u8be5\u7ed3\u6784\u4f53\u4f5c\u4e3abind\u51fd\u6570\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\u8fdb\u884c\u4f20\u5165\uff0c\u8fd9\u5b9e\u9645\u5c31\u662fstruct sockaddr_in<\/code>\u7ed3\u6784\u4f53\u3002<\/p>\n\n\n\n
                        \u6211\u4eec\u53ef\u4ee5\u7528grep\u547d\u4ee4\u5728\/usr\/include<\/code>\u76ee\u5f55\u4e0b\u67e5\u627e\u8be5\u7ed3\u6784\uff0c\u6b64\u65f6\u5c31\u53ef\u4ee5\u627e\u5230\u5b9a\u4e49\u8be5\u7ed3\u6784\u7684\u6587\u4ef6\u3002<\/p>\n\n\n\n
                        \"img\"\/<\/div><\/figure>\n\n\n\n
                        \u5728\u8be5\u6587\u4ef6\u4e2d\u5c31\u53ef\u4ee5\u627e\u5230struct sockaddr_in<\/code>\u7ed3\u6784\u7684\u5b9a\u4e49\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cstruct sockaddr_in<\/code>\u5c5e\u4e8e\u7cfb\u7edf\u7ea7\u7684\u6982\u5ff5\uff0c\u4e0d\u540c\u7684\u5e73\u53f0\u63a5\u53e3\u8bbe\u8ba1\u53ef\u80fd\u4f1a\u6709\u70b9\u5dee\u522b\u3002<\/p>\n\n\n\n
                        \"img\"\/<\/div><\/figure>\n\n\n\n
                        \u53ef\u4ee5\u770b\u5230\uff0cstruct sockaddr_in<\/code>\u5f53\u4e2d\u7684\u6210\u5458\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                          \n
                        • sin_family\uff1a\u8868\u793a\u534f\u8bae\u5bb6\u65cf\u3002<\/li>\n\n\n\n
                        • sin_port\uff1a\u8868\u793a\u7aef\u53e3\u53f7\uff0c\u662f\u4e00\u4e2a16\u4f4d\u6574\u6570\u3002<\/li>\n\n\n\n
                        • sin_addr\uff1a\u8868\u793aIP\u5730\u5740\uff0c\u662f\u4e00\u4e2a32\u4f4d\u6574\u6570\u3002<\/li>\n<\/ul>\n\n\n\n
                          \u5269\u4e0b\u7684\u5b57\u6bb5\u4e00\u822c\u4e0d\u505a\u5904\u7406\uff0c\u5f53\u7136\u4f60\u4e5f\u53ef\u4ee5\u8fdb\u884c\u521d\u59cb\u5316\u3002<\/p>\n\n\n\n
                          \u5176\u4e2dsin_addr\u7684\u7c7b\u578b\u662fstruct in_addr<\/code>\uff0c\u5b9e\u9645\u8be5\u7ed3\u6784\u4f53\u5f53\u4e2d\u5c31\u53ea\u6709\u4e00\u4e2a\u6210\u5458\uff0c\u8be5\u6210\u5458\u5c31\u662f\u4e00\u4e2a32\u4f4d\u7684\u6574\u6570\uff0cIP\u5730\u5740\u5b9e\u9645\u5c31\u662f\u5b58\u50a8\u5728\u8fd9\u4e2a\u6574\u6570\u5f53\u4e2d\u7684\u3002<\/p>\n\n\n\n
                          \"img\"\/<\/div><\/figure>\n\n\n\n
                          \n
                          \u5982\u4f55\u7406\u89e3\u7ed1\u5b9a\uff1f<\/p>\n<\/blockquote>\n\n\n\n
                          \u5728\u8fdb\u884c\u7ed1\u5b9a\u7684\u65f6\u5019\u9700\u8981\u5c06IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\u544a\u8bc9\u5bf9\u5e94\u7684\u7f51\u7edc\u6587\u4ef6\uff0c\u6b64\u65f6\u5c31\u53ef\u4ee5\u6539\u53d8\u7f51\u7edc\u6587\u4ef6\u5f53\u4e2d\u6587\u4ef6\u64cd\u4f5c\u51fd\u6570\u7684\u6307\u5411\uff0c\u5c06\u5bf9\u5e94\u7684\u64cd\u4f5c\u51fd\u6570\u6539\u4e3a\u5bf9\u5e94\u7f51\u5361\u7684\u64cd\u4f5c\u65b9\u6cd5\uff0c\u6b64\u65f6\u8bfb\u6570\u636e\u548c\u5199\u6570\u636e\u5bf9\u5e94\u7684\u64cd\u4f5c\u5bf9\u8c61\u5c31\u662f\u7f51\u5361\u4e86\uff0c\u6240\u4ee5\u7ed1\u5b9a\u5b9e\u9645\u4e0a\u5c31\u662f\u5c06\u6587\u4ef6\u548c\u7f51\u7edc\u5173\u8054\u8d77\u6765\u3002<\/p>\n\n\n\n
                          \n
                          \u589e\u52a0IP\u5730\u5740\u548c\u7aef\u53e3\u53f7<\/p>\n<\/blockquote>\n\n\n\n
                          \u7531\u4e8e\u7ed1\u5b9a\u65f6\u9700\u8981\u7528\u5230IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\uff0c\u56e0\u6b64\u6211\u4eec\u9700\u8981\u5728\u670d\u52a1\u5668\u7c7b\u5f53\u4e2d\u5f15\u5165IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\uff0c\u5728\u521b\u5efa\u670d\u52a1\u5668\u5bf9\u8c61\u65f6\u9700\u8981\u4f20\u5165\u5bf9\u5e94\u7684IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\uff0c\u6b64\u65f6\u6211\u4eec\u5c31\u53ef\u4ee5\u6839\u636e\u4f20\u5165\u7684IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\u5bf9\u5bf9\u5e94\u7684\u6210\u5458\u8fdb\u884c\u521d\u59cb\u5316\u3002<\/p>\n\n\n\n
                          class UdpServer\n{\npublic:\n    UdpServer(std::string ip, int port)\n        :_sockfd(-1)\n        ,_port(port)\n        ,_ip(ip)\n    {};\n    ~UdpServer()\n    {\n        if (_sockfd >= 0){\n            close(_sockfd);\n        }\n    };\nprivate:\n    int _sockfd; \/\/\u6587\u4ef6\u63cf\u8ff0\u7b26\n    int _port; \/\/\u7aef\u53e3\u53f7\n    std::string _ip; \/\/IP\u5730\u5740\n};<\/code><\/pre>\n\n\n\n
                          \u6ce8\u610f\uff1a<\/strong> \u867d\u7136\u8fd9\u91cc\u7aef\u53e3\u53f7\u5b9a\u4e49\u4e3a\u6574\u578b\uff0c\u4f46\u7531\u4e8e\u7aef\u53e3\u53f7\u662f16\u4f4d\u7684\uff0c\u56e0\u6b64\u6211\u4eec\u5b9e\u9645\u53ea\u4f1a\u7528\u5230\u5b83\u7684\u4f4e16\u4f4d\u3002<\/p>\n\n\n\n
                          \n
                          \u670d\u52a1\u7aef\u7ed1\u5b9a<\/p>\n<\/blockquote>\n\n\n\n
                          \u5957\u63a5\u5b57\u521b\u5efa\u5b8c\u6bd5\u540e\u6211\u4eec\u5c31\u9700\u8981\u8fdb\u884c\u7ed1\u5b9a\u4e86\uff0c\u4f46\u5728\u7ed1\u5b9a\u4e4b\u524d\u6211\u4eec\u9700\u8981\u5148\u5b9a\u4e49\u4e00\u4e2astruct sockaddr_in<\/code>\u7ed3\u6784\uff0c\u5c06\u5bf9\u5e94\u7684\u7f51\u7edc\u5c5e\u6027\u4fe1\u606f\u586b\u5145\u5230\u8be5\u7ed3\u6784\u5f53\u4e2d\u3002\u7531\u4e8e\u8be5\u7ed3\u6784\u4f53\u5f53\u4e2d\u8fd8\u6709\u90e8\u5206\u9009\u586b\u5b57\u6bb5\uff0c\u56e0\u6b64\u6211\u4eec\u6700\u597d\u5728\u586b\u5145\u4e4b\u524d\u5bf9\u8be5\u7ed3\u6784\u4f53\u53d8\u91cf\u91cc\u9762\u7684\u5185\u5bb9\u8fdb\u884c\u6e05\u7a7a\uff0c\u7136\u540e\u518d\u5c06\u534f\u8bae\u5bb6\u65cf\u3001\u7aef\u53e3\u53f7\u3001IP\u5730\u5740\u7b49\u4fe1\u606f\u586b\u5145\u5230\u8be5\u7ed3\u6784\u4f53\u53d8\u91cf\u5f53\u4e2d\u3002<\/p>\n\n\n\n
                          \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u518d\u53d1\u9001\u5230\u7f51\u7edc\u4e4b\u524d\u9700\u8981\u5c06\u7aef\u53e3\u53f7\u8bbe\u7f6e\u4e3a\u7f51\u7edc\u5e8f\u5217\uff0c\u7531\u4e8e\u7aef\u53e3\u53f7\u662f16\u4f4d\u7684\uff0c\u56e0\u6b64\u6211\u4eec\u9700\u8981\u4f7f\u7528\u524d\u9762\u8bf4\u5230\u7684htons\u51fd\u6570\u5c06\u7aef\u53e3\u53f7\u8f6c\u4e3a\u7f51\u7edc\u5e8f\u5217\u3002\u6b64\u5916\uff0c\u7531\u4e8e\u7f51\u7edc\u5f53\u4e2d\u4f20\u8f93\u7684\u662f\u6574\u6570IP\uff0c\u6211\u4eec\u9700\u8981\u8c03\u7528inet_addr\u51fd\u6570\u5c06\u5b57\u7b26\u4e32IP\u8f6c\u6362\u6210\u6574\u6570IP\uff0c\u7136\u540e\u518d\u5c06\u8f6c\u6362\u540e\u7684\u6574\u6570IP\u8fdb\u884c\u8bbe\u7f6e\u3002<\/p>\n\n\n\n
                          \u5f53\u7f51\u7edc\u5c5e\u6027\u4fe1\u606f\u586b\u5145\u5b8c\u6bd5\u540e\uff0c\u7531\u4e8ebind\u51fd\u6570\u63d0\u4f9b\u7684\u662f\u901a\u7528\u53c2\u6570\u7c7b\u578b\uff0c\u56e0\u6b64\u5728\u4f20\u5165\u7ed3\u6784\u4f53\u5730\u5740\u7684\u65f6\u5019\u8fd8\u9700\u8981\u5c06struct sockaddr_in*<\/code>\u5f3a\u8f6c\u4e3astruct sockaddr*<\/code>\u7c7b\u578b\u540e\u518d\u8fdb\u884c\u4f20\u5165\u3002<\/p>\n\n\n\n
                          class UdpServer\n{\npublic:\n    UdpServer(std::string ip, int port)\n        :_sockfd(-1)\n        ,_port(port)\n        ,_ip(ip)\n    {};\n    bool InitServer()\n    {\n        \/\/\u521b\u5efa\u5957\u63a5\u5b57\n        _sockfd = socket(AF_INET, SOCK_DGRAM, 0);\n        if (_sockfd < 0){ \/\/\u521b\u5efa\u5957\u63a5\u5b57\u5931\u8d25\n            std::cerr << \"socket error\" << std::endl;\n            return false;\n        }\n\n        std::cout << \"socket create success, sockfd: \" << _sockfd << std::endl;\n\n        \/\/\u586b\u5145\u7f51\u7edc\u901a\u4fe1\u76f8\u5173\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 = inet_addr(_ip.c_str());                                                 \n\n        \/\/\u7ed1\u5b9a\n        if (bind(_sockfd, (struct sockaddr*)&local, sizeof(sockaddr)) < 0){ \/\/\u7ed1\u5b9a\u5931\u8d25\n            std::cerr << \"bind error\" << std::endl;\n            return false;\n        }\n\n        std::cout << \"bind success\" << std::endl;\n\n        return true;\n    }\n    ~UdpServer()\n    {\n        if (_sockfd >= 0){\n            close(_sockfd);\n        }\n    };\nprivate:\n    int _sockfd; \/\/\u6587\u4ef6\u63cf\u8ff0\u7b26\n    int _port; \/\/\u7aef\u53e3\u53f7\n    std::string _ip; \/\/IP\u5730\u5740\n};<\/code><\/pre>\n\n\n\n
                          \u5b57\u7b26\u4e32IP VS \u6574\u6570IP<\/h3>\n\n\n\n
                          IP\u5730\u5740\u7684\u8868\u73b0\u5f62\u5f0f\u6709\u4e24\u79cd\uff1a<\/p>\n\n\n\n
                            \n
                          • \u5b57\u7b26\u4e32IP\uff1a\u7c7b\u4f3c\u4e8e192.168.233.123<\/code>\u8fd9\u79cd\u5b57\u7b26\u4e32\u5f62\u5f0f\u7684IP\u5730\u5740\uff0c\u53eb\u505a\u57fa\u4e8e\u5b57\u7b26\u4e32\u7684\u70b9\u5206\u5341\u8fdb\u5236IP\u5730\u5740\u3002<\/li>\n\n\n\n
                          • \u6574\u6570IP\uff1aIP\u5730\u5740\u5728\u8fdb\u884c\u7f51\u7edc\u4f20\u8f93\u65f6\u6240\u7528\u7684\u5f62\u5f0f\uff0c\u7528\u4e00\u4e2a32\u4f4d\u7684\u6574\u6570\u6765\u8868\u793aIP\u5730\u5740\u3002<\/li>\n<\/ul>\n\n\n\n
                            \n
                            \u6574\u6570IP\u5b58\u5728\u7684\u610f\u4e49<\/p>\n<\/blockquote>\n\n\n\n
                            \u7f51\u7edc\u4f20\u8f93\u6570\u636e\u65f6\u662f\u5bf8\u571f\u5bf8\u91d1\u7684\uff0c\u5982\u679c\u6211\u4eec\u5728\u7f51\u7edc\u4f20\u8f93\u65f6\u76f4\u63a5\u4ee5\u57fa\u4e8e\u5b57\u7b26\u4e32\u7684\u70b9\u5206\u5341\u8fdb\u5236IP\u7684\u5f62\u5f0f\u8fdb\u884cIP\u5730\u5740\u7684\u4f20\u9001\uff0c\u90a3\u4e48\u6b64\u65f6\u4e00\u4e2aIP\u5730\u5740\u81f3\u5c11\u5c31\u9700\u898115\u4e2a\u5b57\u8282\uff0c\u4f46\u5b9e\u9645\u5e76\u4e0d\u9700\u8981\u8017\u8d39\u8fd9\u4e48\u591a\u5b57\u8282\u3002<\/p>\n\n\n\n
                            IP\u5730\u5740\u5b9e\u9645\u53ef\u4ee5\u5212\u5206\u4e3a\u56db\u4e2a\u533a\u57df\uff0c\u5176\u4e2d\u6bcf\u4e00\u4e2a\u533a\u57df\u7684\u53d6\u503c\u90fd\u662f0~255\uff0c\u800c\u8fd9\u4e2a\u8303\u56f4\u7684\u6570\u5b57\u53ea\u9700\u8981\u75288\u4e2a\u6bd4\u7279\u4f4d\u5c31\u80fd\u8868\u793a\uff0c\u56e0\u6b64\u6211\u4eec\u5b9e\u9645\u53ea\u9700\u898132\u4e2a\u6bd4\u7279\u4f4d\u5c31\u80fd\u591f\u8868\u793a\u4e00\u4e2aIP\u5730\u5740\u3002\u5176\u4e2d\u8fd9\u4e2a32\u4f4d\u7684\u6574\u6570\u7684\u6bcf\u4e00\u4e2a\u5b57\u8282\u5bf9\u5e94\u7684\u5c31\u662fIP\u5730\u5740\u4e2d\u7684\u67d0\u4e2a\u533a\u57df\uff0c\u6211\u4eec\u5c06IP\u5730\u5740\u7684\u8fd9\u79cd\u8868\u793a\u65b9\u5f0f\u79f0\u4e4b\u4e3a\u6574\u6570IP\uff0c\u6b64\u65f6\u8868\u793a\u4e00\u4e2aIP\u5730\u5740\u53ea\u9700\u89814\u4e2a\u5b57\u8282\u3002<\/p>\n\n\n\n
                            \"img\"\/<\/div><\/figure>\n\n\n\n
                            \u56e0\u4e3a\u91c7\u7528\u6574\u6570IP\u7684\u65b9\u6848\u8868\u793a\u4e00\u4e2aIP\u5730\u5740\u53ea\u9700\u89814\u4e2a\u5b57\u8282\uff0c\u5e76\u4e14\u5728\u7f51\u7edc\u901a\u4fe1\u4e5f\u80fd\u8868\u793a\u540c\u6837\u7684\u542b\u4e49\uff0c\u56e0\u6b64\u5728\u7f51\u7edc\u901a\u4fe1\u65f6\u5c31\u6ca1\u6709\u7528\u5b57\u7b26\u4e32IP\u800c\u7528\u7684\u662f\u6574\u6570IP\uff0c\u56e0\u4e3a\u8fd9\u6837\u80fd\u591f\u51cf\u5c11\u7f51\u7edc\u901a\u4fe1\u65f6\u6570\u636e\u7684\u4f20\u9001\u3002<\/p>\n\n\n\n
                            \n
                            \u5b57\u7b26\u4e32IP\u548c\u6574\u6570IP\u76f8\u4e92\u8f6c\u6362\u7684\u65b9\u5f0f<\/p>\n<\/blockquote>\n\n\n\n
                            \u8f6c\u6362\u7684\u65b9\u5f0f\u6709\u5f88\u591a\uff0c\u6bd4\u5982\u6211\u4eec\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u4f4d\u6bb5A\uff0c\u4f4d\u6bb5A\u5f53\u4e2d\u6709\u56db\u4e2a\u6210\u5458\uff0c\u6bcf\u4e2a\u6210\u5458\u7684\u5927\u5c0f\u90fd\u662f8\u4e2a\u6bd4\u7279\u4f4d\uff0c\u8fd9\u56db\u4e2a\u6210\u5458\u5c31\u4f9d\u6b21\u8868\u793aIP\u5730\u5740\u7684\u56db\u4e2a\u533a\u57df\uff0c\u4e00\u517132\u4e2a\u6bd4\u7279\u4f4d\u3002<\/p>\n\n\n\n
                            \u7136\u540e\u6211\u4eec\u518d\u5b9a\u4e49\u4e00\u4e2a\u8054\u5408\u4f53IP\uff0c\u8be5\u8054\u5408\u4f53\u5f53\u4e2d\u6709\u4e24\u4e2a\u6210\u5458\uff0c\u5176\u4e2d\u4e00\u4e2a\u662f32\u4f4d\u7684\u6574\u6570\uff0c\u5176\u4ee3\u8868\u7684\u5c31\u662f\u6574\u6570IP\uff0c\u8fd8\u6709\u4e00\u4e2a\u5c31\u662f\u4f4d\u6bb5A\u7c7b\u578b\u7684\u6210\u5458\uff0c\u5176\u4ee3\u8868\u7684\u5c31\u662f\u5b57\u7b26\u4e32IP\u3002<\/p>\n\n\n\n
                            \u7531\u4e8e\u8054\u5408\u4f53\u7684\u7a7a\u95f4\u662f\u6210\u5458\u5171\u4eab\u7684\uff0c\u56e0\u6b64\u6211\u4eec\u8bbe\u7f6eIP\u548c\u8bfb\u53d6IP\u7684\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                              \n
                            • \u5f53\u6211\u4eec\u60f3\u4ee5\u6574\u6570\u7684\u5f62\u5f0f\u8bbe\u7f6eIP\u65f6\uff0c\u76f4\u63a5\u5c06\u5176\u8d4b\u503c\u7ed9\u8054\u5408\u4f53\u7684\u7b2c\u4e00\u4e2a\u6210\u5458\u5c31\u884c\u4e86\u3002<\/li>\n\n\n\n
                            • \u5f53\u6211\u4eec\u60f3\u4ee5\u5b57\u7b26\u4e32\u7684\u5f62\u5f0f\u8bbe\u7f6eIP\u65f6\uff0c\u60f3\u5c06\u5b57\u7b26\u4e32\u5206\u6210\u5bf9\u5e94\u7684\u56db\u90e8\u5206\uff0c\u7136\u540e\u5c06\u6bcf\u90e8\u5206\u8f6c\u6362\u6210\u5bf9\u5e94\u7684\u4e8c\u8fdb\u5236\u5e8f\u5217\u4f9d\u6b21\u8bbe\u7f6e\u5230\u8054\u5408\u4f53\u4e2d\u7b2c\u4e8c\u4e2a\u6210\u5458\u5f53\u4e2d\u7684p1\u3001p2\u3001p3\u548cp4\u5c31\u884c\u4e86\u3002<\/li>\n\n\n\n
                            • \u5f53\u6211\u4eec\u60f3\u53d6\u51fa\u6574\u6570IP\u65f6\uff0c\u76f4\u63a5\u8bfb\u53d6\u8054\u5408\u4f53\u7684\u7b2c\u4e00\u4e2a\u6210\u5458\u5c31\u884c\u4e86\u3002<\/li>\n\n\n\n
                            • \u5f53\u6211\u4eec\u60f3\u53d6\u51fa\u5b57\u7b26\u4e32IP\u65f6\uff0c\u4f9d\u6b21\u83b7\u53d6\u8054\u5408\u4f53\u4e2d\u7b2c\u4e8c\u4e2a\u6210\u5458\u5f53\u4e2d\u7684p1\u3001p2\u3001p3\u548cp4\uff0c\u7136\u540e\u5c06\u6bcf\u4e00\u90e8\u5206\u8f6c\u6362\u6210\u5b57\u7b26\u4e32\u540e\u62fc\u63a5\u5230\u4e00\u8d77\u5c31\u884c\u4e86\u3002<\/li>\n<\/ul>\n\n\n\n
                              \u6ce8\u610f\uff1a<\/strong> \u5728\u64cd\u4f5c\u7cfb\u7edf\u5185\u90e8\u5b9e\u9645\u7528\u7684\u5c31\u662f\u4f4d\u6bb5\u548c\u679a\u4e3e\uff0c\u6765\u5b8c\u6210\u5b57\u7b26\u4e32IP\u548c\u6574\u6570IP\u4e4b\u95f4\u7684\u76f8\u4e92\u8f6c\u6362\u7684\u3002<\/p>\n\n\n\n
                              \n
                              inet_addr\u51fd\u6570<\/p>\n<\/blockquote>\n\n\n\n
                              \u5b9e\u9645\u5728\u8fdb\u884c\u5b57\u7b26\u4e32IP\u548c\u6574\u6570IP\u7684\u8f6c\u6362\u65f6\uff0c\u6211\u4eec\u4e0d\u9700\u8981\u81ea\u5df1\u7f16\u5199\u8f6c\u6362\u903b\u8f91\uff0c\u7cfb\u7edf\u5df2\u7ecf\u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86\u76f8\u5e94\u7684\u8f6c\u6362\u51fd\u6570\uff0c\u6211\u4eec\u76f4\u63a5\u8c03\u7528\u5373\u53ef\u3002<\/p>\n\n\n\n
                              \u5c06\u5b57\u7b26\u4e32IP\u8f6c\u6362\u6210\u6574\u6570IP\u7684\u51fd\u6570\u53eb\u505ainet_addr\uff0c\u8be5\u51fd\u6570\u7684\u51fd\u6570\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                              in_addr_t inet_addr(const char* cp);<\/code><\/pre>\n\n\n\n
                              \u8be5\u51fd\u6570\u4f7f\u7528\u8d77\u6765\u975e\u5e38\u7b80\u5355\uff0c\u6211\u4eec\u53ea\u9700\u4f20\u5165\u5f85\u8f6c\u6362\u7684\u5b57\u7b26\u4e32IP\uff0c\u8be5\u51fd\u6570\u8fd4\u56de\u7684\u5c31\u662f\u8f6c\u6362\u540e\u7684\u6574\u6570IP\u3002\u9664\u6b64\u4e4b\u5916\uff0cinet_aton\u51fd\u6570\u4e5f\u53ef\u4ee5\u5c06\u5b57\u7b26\u4e32IP\u8f6c\u6362\u6210\u6574\u6570IP\uff0c\u4e0d\u8fc7\u8be5\u51fd\u6570\u4f7f\u7528\u8d77\u6765\u6ca1\u6709inet_addr\u7b80\u5355\u3002<\/p>\n\n\n\n
                              \n
                              inet_ntoa\u51fd\u6570<\/p>\n<\/blockquote>\n\n\n\n
                              \u5c06\u6574\u6570IP\u8f6c\u6362\u6210\u5b57\u7b26\u4e32IP\u7684\u51fd\u6570\u53eb\u505ainet_ntoa\uff0c\u8be5\u51fd\u6570\u7684\u51fd\u6570\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                              char* inet_ntoa(strutc in_addr in);<\/code><\/pre>\n\n\n\n
                              \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4f20\u5165inet_nota\u51fd\u6570\u7684\u53c2\u6570\u7c7b\u578b\u662fin_addr<\/code>\uff0c\u56e0\u6b64\u6211\u4eec\u5728\u4f20\u53c2\u65f6\u4e0d\u9700\u8981\u9009\u4e2din_addr<\/code>\u7ed3\u6784\u5f53\u4e2d\u768432\u4f4d\u7684\u6210\u5458\u4f20\u5165\uff0c\u76f4\u63a5\u4f20\u5165in_addr<\/code>\u7ed3\u6784\u4f53\u5373\u53ef\u3002<\/p>\n\n\n\n
                              \u8fd0\u884c\u670d\u52a1\u5668<\/h3>\n\n\n\n
                              UDP\u670d\u52a1\u5668\u7684\u521d\u59cb\u5316\u5c31\u53ea\u9700\u8981\u521b\u5efa\u5957\u63a5\u5b57\u548c\u7ed1\u5b9a\u5c31\u884c\u4e86\uff0c\u5f53\u670d\u52a1\u5668\u521d\u59cb\u5316\u5b8c\u6bd5\u540e\u6211\u4eec\u5c31\u53ef\u4ee5\u542f\u52a8\u670d\u52a1\u5668\u4e86\u3002<\/p>\n\n\n\n
                              \u670d\u52a1\u5668\u5b9e\u9645\u4e0a\u5c31\u662f\u5468\u800c\u590d\u59cb\u7684\u4e3a\u6211\u4eec\u63d0\u4f9b\u67d0\u79cd\u670d\u52a1\uff0c\u670d\u52a1\u5668\u4e4b\u6240\u4ee5\u79f0\u4e3a\u670d\u52a1\u5668\uff0c\u662f\u56e0\u4e3a\u670d\u52a1\u5668\u8fd0\u884c\u8d77\u6765\u540e\u5c31\u6c38\u8fdc\u4e0d\u4f1a\u9000\u51fa\uff0c\u56e0\u6b64\u670d\u52a1\u5668\u5b9e\u9645\u6267\u884c\u7684\u662f\u4e00\u4e2a\u6b7b\u5faa\u73af\u4ee3\u7801\u3002\u7531\u4e8eUDP\u670d\u52a1\u5668\u662f\u4e0d\u9762\u5411\u8fde\u63a5\u7684\uff0c\u56e0\u6b64\u53ea\u8981UDP\u670d\u52a1\u5668\u542f\u52a8\u540e\uff0c\u5c31\u53ef\u4ee5\u76f4\u63a5\u8bfb\u53d6\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u6570\u636e\u3002<\/p>\n\n\n\n
                              \n
                              recvfrom\u51fd\u6570<\/p>\n<\/blockquote>\n\n\n\n
                              UDP\u670d\u52a1\u5668\u8bfb\u53d6\u6570\u636e\u7684\u51fd\u6570\u53eb\u505arecvfrom\uff0c\u8be5\u51fd\u6570\u7684\u51fd\u6570\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                              ssize_t recvfrom(int sockfd, void* buf, size_t len, int flags, struct sockaddr* src_addr, socklen_t* addrlen)<\/code><\/pre>\n\n\n\n
                              \u53c2\u6570\u8bf4\u660e\uff1a<\/p>\n\n\n\n
                                \n
                              • sockfd\uff1a\u5bf9\u5e94\u64cd\u4f5c\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002\u8868\u793a\u4ece\u8be5\u6587\u4ef6\u63cf\u8ff0\u7b26\u7d22\u5f15\u7684\u6587\u4ef6\u5f53\u4e2d\u8bfb\u53d6\u6570\u636e\u3002<\/li>\n\n\n\n
                              • buf\uff1a\u8bfb\u53d6\u6570\u636e\u7684\u5b58\u653e\u4f4d\u7f6e\u3002<\/li>\n\n\n\n
                              • len\uff1a\u671f\u671b\u8bfb\u53d6\u6570\u636e\u7684\u5b57\u8282\u6570\u3002<\/li>\n\n\n\n
                              • flags\uff1a\u8bfb\u53d6\u7684\u65b9\u5f0f\u3002\u4e00\u822c\u8bbe\u7f6e\u4e3a0\uff0c\u8868\u793a\u963b\u585e\u8bfb\u53d6\u3002<\/li>\n\n\n\n
                              • src_addr\uff1a\u5bf9\u7aef\u7f51\u7edc\u76f8\u5173\u7684\u5c5e\u6027\u4fe1\u606f\uff0c\u5305\u62ec\u534f\u8bae\u5bb6\u65cf\u3001IP\u5730\u5740\u3001\u7aef\u53e3\u53f7\u7b49\u3002<\/li>\n\n\n\n
                              • addrlen\uff1a\u8c03\u7528\u65f6\u4f20\u5165\u671f\u671b\u8bfb\u53d6\u7684src_addr\u7ed3\u6784\u4f53\u7684\u957f\u5ea6\uff0c\u8fd4\u56de\u65f6\u4ee3\u8868\u5b9e\u9645\u8bfb\u53d6\u5230\u7684src_addr\u7ed3\u6784\u4f53\u7684\u957f\u5ea6\uff0c\u8fd9\u662f\u4e00\u4e2a\u8f93\u5165\u8f93\u51fa\u578b\u53c2\u6570\u3002<\/li>\n<\/ul>\n\n\n\n
                                \u8fd4\u56de\u503c\u8bf4\u660e\uff1a<\/p>\n\n\n\n
                                  \n
                                • \u8bfb\u53d6\u6210\u529f\u8fd4\u56de\u5b9e\u9645\u8bfb\u53d6\u5230\u7684\u5b57\u8282\u6570\uff0c\u8bfb\u53d6\u5931\u8d25\u8fd4\u56de-1\uff0c\u540c\u65f6\u9519\u8bef\u7801\u4f1a\u88ab\u8bbe\u7f6e\u3002<\/li>\n<\/ul>\n\n\n\n
                                  \u6ce8\u610f\uff1a<\/p>\n\n\n\n
                                    \n
                                  • \u7531\u4e8eUDP\u662f\u4e0d\u9762\u5411\u8fde\u63a5\u7684\uff0c\u56e0\u6b64\u6211\u4eec\u9664\u4e86\u83b7\u53d6\u5230\u6570\u636e\u4ee5\u5916\u8fd8\u9700\u8981\u83b7\u53d6\u5230\u5bf9\u7aef\u7f51\u7edc\u76f8\u5173\u7684\u5c5e\u6027\u4fe1\u606f\uff0c\u5305\u62ecIP\u5730\u5740\u548c\u7aef\u53e3\u53f7\u7b49\u3002<\/li>\n\n\n\n
                                  • \u5728\u8c03\u7528recvfrom\u8bfb\u53d6\u6570\u636e\u65f6\uff0c\u5fc5\u987b\u5c06addrlen\u8bbe\u7f6e\u4e3a\u4f60\u8981\u8bfb\u53d6\u7684\u7ed3\u6784\u4f53\u5bf9\u5e94\u7684\u5927\u5c0f\u3002<\/li>\n\n\n\n
                                  • \u7531\u4e8erecvfrom\u51fd\u6570\u63d0\u4f9b\u7684\u53c2\u6570\u4e5f\u662fstruct sockaddr*<\/code>\u7c7b\u578b\u7684\uff0c\u56e0\u6b64\u6211\u4eec\u5728\u4f20\u5165\u7ed3\u6784\u4f53\u5730\u5740\u65f6\u9700\u8981\u5c06struct sockaddr_in*<\/code>\u7c7b\u578b\u8fdb\u884c\u5f3a\u8f6c\u3002<\/li>\n<\/ul>\n\n\n\n
                                    \n
                                    \u542f\u52a8\u670d\u52a1\u5668\u51fd\u6570<\/p>\n<\/blockquote>\n\n\n\n
                                    \u73b0\u5728\u670d\u52a1\u7aef\u901a\u8fc7recvfrom\u51fd\u6570\u8bfb\u53d6\u5ba2\u6237\u7aef\u6570\u636e\uff0c\u6211\u4eec\u53ef\u4ee5\u5148\u5c06\u8bfb\u53d6\u5230\u7684\u6570\u636e\u5f53\u4f5c\u5b57\u7b26\u4e32\u770b\u5f85\uff0c\u5c06\u8bfb\u53d6\u5230\u7684\u6570\u636e\u7684\u6700\u540e\u4e00\u4e2a\u4f4d\u7f6e\u8bbe\u7f6e\u4e3a'\\0'<\/code>\uff0c\u6b64\u65f6\u6211\u4eec\u5c31\u53ef\u4ee5\u5c06\u8bfb\u53d6\u5230\u7684\u6570\u636e\u8fdb\u884c\u8f93\u51fa\uff0c\u540c\u65f6\u6211\u4eec\u4e5f\u53ef\u4ee5\u5c06\u83b7\u53d6\u5230\u7684\u5ba2\u6237\u7aef\u7684IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\u4e5f\u4e00\u5e76\u8fdb\u884c\u8f93\u51fa\u3002<\/p>\n\n\n\n
                                    \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u6211\u4eec\u83b7\u53d6\u5230\u7684\u5ba2\u6237\u7aef\u7684\u7aef\u53e3\u53f7\u6b64\u65f6\u662f\u7f51\u7edc\u5e8f\u5217\uff0c\u6211\u4eec\u9700\u8981\u8c03\u7528ntohs\u51fd\u6570\u5c06\u5176\u8f6c\u4e3a\u4e3b\u673a\u5e8f\u5217\u518d\u8fdb\u884c\u6253\u5370\u8f93\u51fa\u3002\u540c\u65f6\uff0c\u6211\u4eec\u83b7\u53d6\u5230\u7684\u5ba2\u6237\u7aef\u7684IP\u5730\u5740\u662f\u6574\u6570IP\uff0c\u6211\u4eec\u9700\u8981\u901a\u8fc7inet_ntoa\u51fd\u6570\u5c06\u5176\u8f6c\u4e3a\u5b57\u7b26\u4e32IP\u518d\u8fdb\u884c\u6253\u5370\u8f93\u51fa\u3002<\/p>\n\n\n\n
                                    class UdpServer\n{\npublic:\n    void Start()\n    {\n#define SIZE 128\n        char buffer[SIZE];\n        for (;;){\n            struct sockaddr_in peer;\n            socklen_t len = sizeof(peer);\n            ssize_t size = recvfrom(_sockfd, buffer, sizeof(buffer)-1, 0, (struct sockaddr*)&peer, &len);\n            if (size > 0){\n                buffer[size] = '\\0';\n                int port = ntohs(peer.sin_port);\n                std::string ip = inet_ntoa(peer.sin_addr);\n                std::cout << ip << \":\" << port << \"# \" << buffer << std::endl;\n            }\n            else{\n                std::cerr << \"recvfrom error\" << std::endl;\n            }\n        }\n    }\nprivate:\n    int _sockfd; \/\/\u6587\u4ef6\u63cf\u8ff0\u7b26\n    int _port; \/\/\u7aef\u53e3\u53f7\n    std::string _ip; \/\/IP\u5730\u5740\n};<\/code><\/pre>\n\n\n\n
                                    \u6ce8\u610f\uff1a<\/strong> \u5982\u679c\u8c03\u7528recvfrom\u51fd\u6570\u8bfb\u53d6\u6570\u636e\u5931\u8d25\uff0c\u6211\u4eec\u53ef\u4ee5\u6253\u5370\u4e00\u6761\u63d0\u793a\u4fe1\u606f\uff0c\u4f46\u662f\u4e0d\u8981\u8ba9\u670d\u52a1\u5668\u9000\u51fa\uff0c\u670d\u52a1\u5668\u4e0d\u80fd\u56e0\u4e3a\u8bfb\u53d6\u67d0\u4e00\u4e2a\u5ba2\u6237\u7aef\u7684\u6570\u636e\u5931\u8d25\u5c31\u9000\u51fa\u3002<\/p>\n\n\n\n
                                    \n
                                    \u5f15\u5165\u547d\u4ee4\u884c\u53c2\u6570<\/p>\n<\/blockquote>\n\n\n\n
                                    \u9274\u4e8e\u6784\u9020\u670d\u52a1\u5668\u65f6\u9700\u8981\u4f20\u5165IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\uff0c\u6211\u4eec\u8fd9\u91cc\u53ef\u4ee5\u5f15\u5165\u547d\u4ee4\u884c\u53c2\u6570\u3002\u6b64\u65f6\u5f53\u6211\u4eec\u8fd0\u884c\u670d\u52a1\u5668\u65f6\u5728\u540e\u9762\u8ddf\u4e0a\u5bf9\u5e94\u7684IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\u5373\u53ef\u3002<\/p>\n\n\n\n
                                    \u7531\u4e8e\u4e91\u670d\u52a1\u5668\u7684\u539f\u56e0\uff0c\u5b9e\u9645\u4e0d\u9700\u8981\u4f20\u5165IP\u5730\u5740\uff0c\u56e0\u6b64\u5728\u8fd0\u884c\u670d\u52a1\u5668\u7684\u65f6\u5019\u6211\u4eec\u53ea\u9700\u8981\u4f20\u5165\u7aef\u53e3\u53f7\u5373\u53ef\uff0c\u76ee\u524d\u6211\u4eec\u5c31\u624b\u52a8\u5c06IP\u5730\u5740\u8bbe\u7f6e\u4e3a127.0.0.1<\/code>\u3002IP\u5730\u5740\u4e3a127.0.0.1<\/code>\u5b9e\u9645\u4e0a\u7b49\u4ef7\u4e8elocalhost\u8868\u793a\u672c\u5730\u4e3b\u673a\uff0c\u6211\u4eec\u5c06\u5b83\u79f0\u4e4b\u4e3a\u672c\u5730\u73af\u56de\uff0c\u76f8\u5f53\u4e8e\u6211\u4eec\u4e00\u4f1a\u5148\u5728\u672c\u5730\u6d4b\u8bd5\u4e00\u4e0b\u80fd\u5426\u6b63\u5e38\u901a\u4fe1\uff0c\u7136\u540e\u518d\u8fdb\u884c\u7f51\u7edc\u901a\u4fe1\u7684\u6d4b\u8bd5\u3002<\/p>\n\n\n\n
                                    int main(int argc, char* argv[])\n{\n    if (argc != 2){\n        std::cerr << \"Usage: \" << argv[0] << \" port\" << std::endl;\n        return 1;\n    }\n    std::string ip = \"127.0.0.1\"; \/\/\u672c\u5730\u73af\u56de\n    int port = atoi(argv[1]);\n    UdpServer* svr = new UdpServer(ip, port);\n    svr->InitServer();\n    svr->Start();\n    return 0;\n}<\/code><\/pre>\n\n\n\n
                                    \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cargv\u6570\u7ec4\u91cc\u5b58\u50a8\u7684\u662f\u5b57\u7b26\u4e32\uff0c\u800c\u7aef\u53e3\u53f7\u662f\u4e00\u4e2a\u6574\u6570\uff0c\u56e0\u6b64\u9700\u8981\u4f7f\u7528atoi\u51fd\u6570\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u6210\u6574\u6570\u3002\u7136\u540e\u6211\u4eec\u5c31\u53ef\u4ee5\u7528\u8fd9\u4e2a\u4e2aIP\u5730\u5740\u548c\u7aef\u53e3\u53f7\u6765\u6784\u9020\u670d\u52a1\u5668\u4e86\uff0c\u670d\u52a1\u5668\u6784\u9020\u5b8c\u6210\u5e76\u521d\u59cb\u5316\u540e\u5c31\u53ef\u4ee5\u8c03\u7528Start\u51fd\u6570\u542f\u52a8\u670d\u52a1\u5668\u4e86\u3002<\/p>\n\n\n\n
                                    \u6b64\u65f6\u5e26\u4e0a\u7aef\u53e3\u53f7\u8fd0\u884c\u7a0b\u5e8f\u5c31\u53ef\u4ee5\u770b\u5230\u5957\u63a5\u5b57\u521b\u5efa\u6210\u529f\u3001\u7ed1\u5b9a\u6210\u529f\uff0c\u73b0\u5728\u670d\u52a1\u5668\u5c31\u5728\u7b49\u5f85\u5ba2\u6237\u7aef\u5411\u5b83\u53d1\u9001\u6570\u636e\u3002<\/p>\n\n\n\n
                                    \"img\"\/<\/div><\/figure>\n\n\n\n
                                    \u867d\u7136\u73b0\u5728\u5ba2\u6237\u7aef\u4ee3\u7801\u8fd8\u6ca1\u6709\u7f16\u5199\uff0c\u4f46\u662f\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7netstat<\/code>\u547d\u4ee4\u6765\u67e5\u770b\u5f53\u524d\u7f51\u7edc\u7684\u72b6\u6001\uff0c\u8fd9\u91cc\u6211\u4eec\u53ef\u4ee5\u9009\u62e9\u643a\u5e26nlup\u9009\u9879\u3002<\/p>\n\n\n\n
                                    netstat<\/code>\u5e38\u7528\u9009\u9879\u8bf4\u660e\uff1a<\/p>\n\n\n\n
                                      \n
                                    • -n\uff1a\u76f4\u63a5\u4f7f\u7528IP\u5730\u5740\uff0c\u800c\u4e0d\u901a\u8fc7\u57df\u540d\u670d\u52a1\u5668\u3002<\/li>\n\n\n\n
                                    • -l\uff1a\u663e\u793a\u76d1\u63a7\u4e2d\u7684\u670d\u52a1\u5668\u7684Socket\u3002<\/li>\n\n\n\n
                                    • -t\uff1a\u663e\u793aTCP\u4f20\u8f93\u534f\u8bae\u7684\u8fde\u63a5\u72b6\u51b5\u3002<\/li>\n\n\n\n
                                    • -u\uff1a\u663e\u793aUDP\u4f20\u8f93\u534f\u8bae\u7684\u8fde\u63a5\u72b6\u51b5\u3002<\/li>\n\n\n\n
                                    • -p\uff1a\u663e\u793a\u6b63\u5728\u4f7f\u7528Socket\u7684\u7a0b\u5e8f\u8bc6\u522b\u7801\u548c\u7a0b\u5e8f\u540d\u79f0\u3002<\/li>\n<\/ul>\n\n\n\n
                                      \u6b64\u65f6\u4f60\u5c31\u80fd\u67e5\u770b\u5230\u5bf9\u5e94\u7f51\u7edc\u76f8\u5173\u7684\u4fe1\u606f\uff0c\u5728\u8fd9\u4e9b\u4fe1\u606f\u4e2d\u7a0b\u5e8f\u540d\u79f0\u4e3a.\/udp_server<\/code>\u7684\u90a3\u4e00\u884c\u663e\u793a\u7684\u5c31\u662f\u6211\u4eec\u8fd0\u884c\u7684UDP\u670d\u52a1\u5668\u7684\u7f51\u7edc\u4fe1\u606f\u3002<\/p>\n\n\n\n
                                      \"img\"\/<\/div><\/figure>\n\n\n\n
                                      \u4f60\u53ef\u4ee5\u5c1d\u8bd5\u53bb\u6389-n<\/code>\u9009\u9879\u518d\u67e5\u770b\uff0c\u6b64\u65f6\u539f\u672c\u663e\u793aIP\u5730\u5740\u7684\u5730\u65b9\u5c31\u53d8\u6210\u4e86\u5bf9\u5e94\u7684\u57df\u540d\u670d\u52a1\u5668\u3002<\/p>\n\n\n\n
                                      \"img\"\/<\/div><\/figure>\n\n\n\n
                                      \u5176\u4e2dnetstat<\/code>\u547d\u4ee4\u663e\u793a\u7684\u4fe1\u606f\u4e2d\uff0cProto<\/code>\u8868\u793a\u534f\u8bae\u7684\u7c7b\u578b\uff0cRecv-Q<\/code>\u8868\u793a\u7f51\u7edc\u63a5\u6536\u961f\u5217\uff0cSend-Q<\/code>\u8868\u793a\u7f51\u7edc\u53d1\u9001\u961f\u5217\uff0cLocal Address<\/code>\u8868\u793a\u672c\u5730\u5730\u5740\uff0cForeign Address<\/code>\u8868\u793a\u5916\u90e8\u5730\u5740\uff0cState<\/code>\u8868\u793a\u5f53\u524d\u7684\u72b6\u6001\uff0cPID<\/code>\u8868\u793a\u8be5\u8fdb\u7a0b\u7684\u8fdb\u7a0bID\uff0cProgram name<\/code>\u8868\u793a\u8be5\u8fdb\u7a0b\u7684\u7a0b\u5e8f\u540d\u79f0\u3002<\/p>\n\n\n\n
                                      \u5176\u4e2dForeign Address<\/code>\u5199\u62100.0.0.0:*<\/code>\u8868\u793a\u4efb\u610fIP\u5730\u5740\u3001\u4efb\u610f\u7684\u7aef\u53e3\u53f7\u7684\u7a0b\u5e8f\u90fd\u53ef\u4ee5\u8bbf\u95ee\u5f53\u524d\u8fdb\u7a0b\u3002<\/p>\n\n\n\n
                                      \u5ba2\u6237\u7aef\u521b\u5efa\u5957\u63a5\u5b57<\/h3>\n\n\n\n
                                      \u540c\u6837\u7684\uff0c\u6211\u4eec\u628a\u5ba2\u6237\u7aef\u4e5f\u5c01\u88c5\u6210\u4e00\u4e2a\u7c7b\uff0c\u5f53\u6211\u4eec\u5b9a\u4e49\u51fa\u4e00\u4e2a\u5ba2\u6237\u7aef\u5bf9\u8c61\u540e\u4e5f\u662f\u9700\u8981\u5bf9\u5176\u8fdb\u884c\u521d\u59cb\u5316\uff0c\u800c\u5ba2\u6237\u7aef\u5728\u521d\u59cb\u5316\u65f6\u4e5f\u9700\u8981\u521b\u5efa\u5957\u63a5\u5b57\uff0c\u4e4b\u540e\u5ba2\u6237\u7aef\u53d1\u9001\u6570\u636e\u6216\u63a5\u6536\u6570\u636e\u4e5f\u5c31\u662f\u5bf9\u8fd9\u4e2a\u5957\u63a5\u5b57\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n\n\n\n
                                      \u5ba2\u6237\u7aef\u521b\u5efa\u5957\u63a5\u5b57\u65f6\u9009\u62e9\u7684\u534f\u8bae\u5bb6\u65cf\u4e5f\u662fAF_INET<\/code>\uff0c\u9700\u8981\u7684\u670d\u52a1\u7c7b\u578b\u4e5f\u662fSOCK_DGRAM<\/code>\uff0c\u5f53\u5ba2\u6237\u7aef\u88ab\u6790\u6784\u65f6\u4e5f\u53ef\u4ee5\u9009\u62e9\u5173\u95ed\u5bf9\u5e94\u7684\u5957\u63a5\u5b57\u3002\u4e0e\u670d\u52a1\u7aef\u4e0d\u540c\u7684\u662f\uff0c\u5ba2\u6237\u7aef\u5728\u521d\u59cb\u5316\u65f6\u53ea\u9700\u8981\u521b\u5efa\u5957\u63a5\u5b57\u5c31\u884c\u4e86\uff0c\u800c\u4e0d\u9700\u8981\u8fdb\u884c\u7ed1\u5b9a\u64cd\u4f5c\u3002<\/p>\n\n\n\n
                                      class UdpClient\n{\npublic:\n    bool InitClient()\n    {\n        \/\/\u521b\u5efa\u5957\u63a5\u5b57\n        _sockfd = socket(AF_INET, SOCK_DGRAM, 0);\n        if (_sockfd < 0){\n            std::cerr << \"socket create error\" << std::endl;\n            return false;\n        }\n        return true;\n    }\n    ~UdpClient()\n    {\n        if (_sockfd >= 0){\n            close(_sockfd);\n        }\n    }\nprivate:\n    int _sockfd; \/\/\u6587\u4ef6\u63cf\u8ff0\u7b26\n};<\/code><\/pre>\n\n\n\n
                                      \u5173\u4e8e\u5ba2\u6237\u7aef\u7684\u7ed1\u5b9a\u95ee\u9898<\/h3>\n\n\n\n
                                      \u9996\u5148\uff0c\u7531\u4e8e\u662f\u7f51\u7edc\u901a\u4fe1\uff0c\u901a\u4fe1\u53cc\u65b9\u90fd\u9700\u8981\u627e\u5230\u5bf9\u65b9\uff0c\u56e0\u6b64\u670d\u52a1\u7aef\u548c\u5ba2\u6237\u7aef\u90fd\u9700\u8981\u6709\u5404\u81ea\u7684IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\uff0c\u53ea\u4e0d\u8fc7\u670d\u52a1\u7aef\u9700\u8981\u8fdb\u884c\u7aef\u53e3\u53f7\u7684\u7ed1\u5b9a\uff0c\u800c\u5ba2\u6237\u7aef\u4e0d\u9700\u8981\u3002<\/p>\n\n\n\n
                                      \u56e0\u4e3a\u670d\u52a1\u5668\u5c31\u662f\u4e3a\u4e86\u7ed9\u522b\u4eba\u63d0\u4f9b\u670d\u52a1\u7684\uff0c\u56e0\u6b64\u670d\u52a1\u5668\u5fc5\u987b\u8981\u8ba9\u522b\u4eba\u77e5\u9053\u81ea\u5df1\u7684IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\uff0cIP\u5730\u5740\u4e00\u822c\u5bf9\u5e94\u7684\u5c31\u662f\u57df\u540d\uff0c\u800c\u7aef\u53e3\u53f7\u4e00\u822c\u6ca1\u6709\u663e\u793a\u6307\u660e\u8fc7\uff0c\u56e0\u6b64\u670d\u52a1\u5668\u7684\u7aef\u53e3\u53f7\u4e00\u5b9a\u8981\u662f\u4e00\u4e2a\u4f17\u6240\u5468\u77e5\u7684\u7aef\u53e3\u53f7\uff0c\u5e76\u4e14\u9009\u5b9a\u540e\u4e0d\u80fd\u8f7b\u6613\u6539\u53d8\uff0c\u5426\u5219\u5ba2\u6237\u7aef\u662f\u65e0\u6cd5\u77e5\u9053\u670d\u52a1\u7aef\u7684\u7aef\u53e3\u53f7\u7684\uff0c\u8fd9\u5c31\u662f\u670d\u52a1\u7aef\u8981\u8fdb\u884c\u7ed1\u5b9a\u7684\u539f\u56e0\uff0c\u53ea\u6709\u7ed1\u5b9a\u4e4b\u540e\u8fd9\u4e2a\u7aef\u53e3\u53f7\u624d\u771f\u6b63\u5c5e\u4e8e\u81ea\u5df1\uff0c\u56e0\u4e3a\u4e00\u4e2a\u7aef\u53e3\u53ea\u80fd\u88ab\u4e00\u4e2a\u8fdb\u7a0b\u6240\u7ed1\u5b9a\uff0c\u670d\u52a1\u5668\u7ed1\u5b9a\u4e00\u4e2a\u7aef\u53e3\u5c31\u662f\u4e3a\u4e86\u72ec\u5360\u8fd9\u4e2a\u7aef\u53e3\u3002<\/p>\n\n\n\n
                                      \u800c\u5ba2\u6237\u7aef\u5728\u901a\u4fe1\u65f6\u867d\u7136\u4e5f\u9700\u8981\u7aef\u53e3\u53f7\uff0c\u4f46\u5ba2\u6237\u7aef\u4e00\u822c\u662f\u4e0d\u8fdb\u884c\u7ed1\u5b9a\u7684\uff0c\u5ba2\u6237\u7aef\u8bbf\u95ee\u670d\u52a1\u7aef\u7684\u65f6\u5019\uff0c\u7aef\u53e3\u53f7\u53ea\u8981\u662f\u552f\u4e00\u7684\u5c31\u884c\u4e86\uff0c\u4e0d\u9700\u8981\u548c\u7279\u5b9a\u5ba2\u6237\u7aef\u8fdb\u7a0b\u5f3a\u76f8\u5173\u3002<\/p>\n\n\n\n
                                      \u5982\u679c\u5ba2\u6237\u7aef\u7ed1\u5b9a\u4e86\u67d0\u4e2a\u7aef\u53e3\u53f7\uff0c\u90a3\u4e48\u4ee5\u540e\u8fd9\u4e2a\u7aef\u53e3\u53f7\u5c31\u53ea\u80fd\u7ed9\u8fd9\u4e00\u4e2a\u5ba2\u6237\u7aef\u4f7f\u7528\uff0c\u5c31\u662f\u8fd9\u4e2a\u5ba2\u6237\u7aef\u6ca1\u6709\u542f\u52a8\uff0c\u8fd9\u4e2a\u7aef\u53e3\u53f7\u4e5f\u65e0\u6cd5\u5206\u914d\u7ed9\u522b\u4eba\uff0c\u5e76\u4e14\u5982\u679c\u8fd9\u4e2a\u7aef\u53e3\u53f7\u88ab\u522b\u4eba\u4f7f\u7528\u4e86\uff0c\u90a3\u4e48\u8fd9\u4e2a\u5ba2\u6237\u7aef\u5c31\u65e0\u6cd5\u542f\u52a8\u4e86\u3002\u6240\u4ee5\u5ba2\u6237\u7aef\u7684\u7aef\u53e3\u53ea\u8981\u4fdd\u8bc1\u552f\u4e00\u6027\u5c31\u884c\u4e86\uff0c\u56e0\u6b64\u5ba2\u6237\u7aef\u7aef\u53e3\u53ef\u4ee5\u52a8\u6001\u7684\u8fdb\u884c\u8bbe\u7f6e\uff0c\u5e76\u4e14\u5ba2\u6237\u7aef\u7684\u7aef\u53e3\u53f7\u4e0d\u9700\u8981\u6211\u4eec\u6765\u8bbe\u7f6e\uff0c\u5f53\u6211\u4eec\u8c03\u7528\u7c7b\u4f3c\u4e8esendto\u8fd9\u6837\u7684\u63a5\u53e3\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u81ea\u52a8\u7ed9\u5f53\u524d\u5ba2\u6237\u7aef\u83b7\u53d6\u4e00\u4e2a\u552f\u4e00\u7684\u7aef\u53e3\u53f7\u3002<\/p>\n\n\n\n
                                      \u4e5f\u5c31\u662f\u8bf4\uff0c\u5ba2\u6237\u7aef\u6bcf\u6b21\u542f\u52a8\u65f6\u4f7f\u7528\u7684\u7aef\u53e3\u53f7\u53ef\u80fd\u662f\u53d8\u5316\u7684\uff0c\u6b64\u65f6\u53ea\u8981\u6211\u4eec\u7684\u7aef\u53e3\u53f7\u6ca1\u6709\u88ab\u8017\u5c3d\uff0c\u5ba2\u6237\u7aef\u5c31\u6c38\u8fdc\u53ef\u4ee5\u542f\u52a8\u3002<\/p>\n\n\n\n
                                      \u542f\u52a8\u5ba2\u6237\u7aef<\/h3>\n\n\n\n
                                      \n
                                      \u589e\u52a0\u670d\u52a1\u7aefIP\u5730\u5740\u548c\u7aef\u53e3<\/p>\n<\/blockquote>\n\n\n\n
                                      \u4f5c\u4e3a\u4e00\u4e2a\u5ba2\u6237\u7aef\uff0c\u5b83\u5fc5\u987b\u77e5\u9053\u5b83\u8981\u8bbf\u95ee\u7684\u670d\u52a1\u7aef\u7684IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\uff0c\u56e0\u6b64\u5728\u5ba2\u6237\u7aef\u7c7b\u5f53\u4e2d\u9700\u8981\u5f15\u5165\u670d\u52a1\u7aef\u7684IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\uff0c\u6b64\u65f6\u6211\u4eec\u5c31\u53ef\u4ee5\u6839\u636e\u4f20\u5165\u7684\u670d\u52a1\u7aef\u7684IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\u5bf9\u5bf9\u5e94\u7684\u6210\u5458\u8fdb\u884c\u521d\u59cb\u5316\u3002<\/p>\n\n\n\n
                                      class UdpClient\n{\npublic:\n    UdpClient(std::string server_ip, int server_port)\n        :_sockfd(-1)\n        ,_server_port(server_port)\n        ,_server_ip(server_ip)\n    {}\n    ~UdpClient()\n    {\n        if (_sockfd >= 0){\n            close(_sockfd);\n        }\n    }\nprivate:\n    int _sockfd; \/\/\u6587\u4ef6\u63cf\u8ff0\u7b26\n    int _server_port; \/\/\u670d\u52a1\u7aef\u7aef\u53e3\u53f7\n    std::string _server_ip; \/\/\u670d\u52a1\u7aefIP\u5730\u5740\n};<\/code><\/pre>\n\n\n\n
                                      \u5f53\u5ba2\u6237\u7aef\u521d\u59cb\u5316\u5b8c\u6bd5\u540e\u6211\u4eec\u5c31\u53ef\u4ee5\u5c06\u5ba2\u6237\u7aef\u8fd0\u884c\u8d77\u6765\uff0c\u7531\u4e8e\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\u5728\u529f\u80fd\u4e0a\u662f\u76f8\u4e92\u8865\u5145\u7684\uff0c\u65e2\u7136\u670d\u52a1\u5668\u662f\u5728\u8bfb\u53d6\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u6570\u636e\uff0c\u90a3\u4e48\u5ba2\u6237\u7aef\u5c31\u5e94\u8be5\u5411\u670d\u52a1\u7aef\u53d1\u9001\u6570\u636e\u3002<\/p>\n\n\n\n
                                      \n
                                      sendto\u51fd\u6570<\/p>\n<\/blockquote>\n\n\n\n
                                      UDP\u5ba2\u6237\u7aef\u53d1\u9001\u6570\u636e\u7684\u51fd\u6570\u53eb\u505asendto\uff0c\u8be5\u51fd\u6570\u7684\u51fd\u6570\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                                      ssize_t sendto(int sockfd, const void* buf, size_t len, int flags, const struct sockaddr* dest_addr, socklen_t addrlen);<\/code><\/pre>\n\n\n\n
                                      \u53c2\u6570\u8bf4\u660e\uff1a<\/p>\n\n\n\n
                                        \n
                                      • socket\uff1a\u5bf9\u5e94\u64cd\u4f5c\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002\u8868\u793a\u5c06\u6570\u636e\u5199\u5165\u8be5\u6587\u4ef6\u63cf\u8ff0\u7b26\u7d22\u5f15\u7684\u6587\u4ef6\u5f53\u4e2d\u3002<\/li>\n\n\n\n
                                      • buf\uff1a\u5f85\u5199\u5165\u6570\u636e\u7684\u5b58\u653e\u4f4d\u7f6e\u3002<\/li>\n\n\n\n
                                      • len\uff1a\u671f\u5f85\u5199\u5165\u6570\u636e\u7684\u5b57\u8282\u6570\u3002<\/li>\n\n\n\n
                                      • flags\uff1a\u5199\u5165\u7684\u65b9\u5f0f\u3002\u4e00\u822c\u8bbe\u7f6e\u4e3a0\uff0c\u8868\u793a\u963b\u585e\u5199\u5165\u3002<\/li>\n\n\n\n
                                      • dest_addr\uff1a\u5bf9\u7aef\u7f51\u7edc\u76f8\u5173\u7684\u5c5e\u6027\u4fe1\u606f\uff0c\u5305\u62ec\u534f\u8bae\u5bb6\u65cf\u3001IP\u5730\u5740\u3001\u7aef\u53e3\u53f7\u7b49\u3002<\/li>\n\n\n\n
                                      • addrlen\uff1a\u4f20\u5165dest_addr\u7ed3\u6784\u4f53\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n\n\n\n
                                        \u8fd4\u56de\u503c\u8bf4\u660e\uff1a<\/p>\n\n\n\n
                                          \n
                                        • \u5199\u5165\u6210\u529f\u8fd4\u56de\u5b9e\u9645\u5199\u5165\u7684\u5b57\u8282\u6570\uff0c\u5199\u5165\u5931\u8d25\u8fd4\u56de-1\uff0c\u540c\u65f6\u9519\u8bef\u7801\u4f1a\u88ab\u8bbe\u7f6e\u3002<\/li>\n<\/ul>\n\n\n\n
                                          \u6ce8\u610f\uff1a<\/p>\n\n\n\n
                                            \n
                                          • \u7531\u4e8eUDP\u4e0d\u662f\u9762\u5411\u8fde\u63a5\u7684\uff0c\u56e0\u6b64\u9664\u4e86\u4f20\u5165\u5f85\u53d1\u9001\u7684\u6570\u636e\u4ee5\u5916\u8fd8\u9700\u8981\u6307\u660e\u5bf9\u7aef\u7f51\u7edc\u76f8\u5173\u4fe1\u606f\uff0c\u5305\u62ecIP\u5730\u5740\u548c\u7aef\u53e3\u53f7\u7b49\u3002<\/li>\n\n\n\n
                                          • \u7531\u4e8esendto\u51fd\u6570\u63d0\u4f9b\u7684\u53c2\u6570\u4e5f\u662fstruct sockaddr*<\/code>\u7c7b\u578b\u7684\uff0c\u56e0\u6b64\u6211\u4eec\u5728\u4f20\u5165\u7ed3\u6784\u4f53\u5730\u5740\u65f6\u9700\u8981\u5c06struct sockaddr_in*<\/code>\u7c7b\u578b\u8fdb\u884c\u5f3a\u8f6c\u3002<\/li>\n<\/ul>\n\n\n\n
                                            \n
                                            \u542f\u52a8\u5ba2\u6237\u7aef\u51fd\u6570<\/p>\n<\/blockquote>\n\n\n\n
                                            \u73b0\u5728\u5ba2\u6237\u7aef\u8981\u53d1\u9001\u6570\u636e\u7ed9\u670d\u52a1\u7aef\uff0c\u6211\u4eec\u53ef\u4ee5\u8ba9\u5ba2\u6237\u7aef\u83b7\u53d6\u7528\u6237\u8f93\u5165\uff0c\u4e0d\u65ad\u5c06\u7528\u6237\u8f93\u5165\u7684\u6570\u636e\u53d1\u9001\u7ed9\u670d\u52a1\u7aef\u3002<\/p>\n\n\n\n
                                            \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5ba2\u6237\u7aef\u4e2d\u5b58\u50a8\u7684\u670d\u52a1\u7aef\u7684\u7aef\u53e3\u53f7\u6b64\u65f6\u662f\u4e3b\u673a\u5e8f\u5217\uff0c\u6211\u4eec\u9700\u8981\u8c03\u7528htons\u51fd\u6570\u5c06\u5176\u8f6c\u4e3a\u7f51\u7edc\u5e8f\u5217\u540e\u518d\u8bbe\u7f6e\u8fdbstruct sockaddr_in<\/code>\u7ed3\u6784\u4f53\u3002\u540c\u65f6\uff0c\u5ba2\u6237\u7aef\u4e2d\u5b58\u50a8\u7684\u670d\u52a1\u7aef\u7684IP\u5730\u5740\u662f\u5b57\u7b26\u4e32IP\uff0c\u6211\u4eec\u9700\u8981\u901a\u8fc7\u8c03\u7528inet_addr\u51fd\u6570\u5c06\u5176\u8f6c\u4e3a\u6574\u6570IP\u540e\u518d\u8bbe\u7f6e\u8fdbstruct sockaddr_in<\/code>\u7ed3\u6784\u4f53\u3002<\/p>\n\n\n\n
                                            class UdpClient\n{\npublic:\n    void Start()\n    {\n        std::string msg;\n        struct sockaddr_in peer;\n        memset(&peer, '\\0', sizeof(peer));\n        peer.sin_family = AF_INET;\n        peer.sin_port = htons(_server_port);\n        peer.sin_addr.s_addr = inet_addr(_server_ip.c_str());\n\n        for (;;){\n            std::cout << \"Please Enter# \";\n            getline(std::cin, msg);\n            sendto(_sockfd, msg.c_str(), msg.size(), 0, (struct sockaddr*)&peer, sizeof(peer));\n        }\n    }\nprivate:\n    int _sockfd; \/\/\u6587\u4ef6\u63cf\u8ff0\u7b26\n    int _server_port; \/\/\u670d\u52a1\u7aef\u7aef\u53e3\u53f7\n    std::string _server_ip; \/\/\u670d\u52a1\u7aefIP\u5730\u5740\n};<\/code><\/pre>\n\n\n\n
                                            \n
                                            \u5f15\u5165\u547d\u4ee4\u884c\u53c2\u6570<\/p>\n<\/blockquote>\n\n\n\n
                                            \u9274\u4e8e\u6784\u9020\u5ba2\u6237\u7aef\u65f6\u9700\u8981\u4f20\u5165\u5bf9\u5e94\u670d\u52a1\u7aef\u7684IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\uff0c\u6211\u4eec\u8fd9\u91cc\u4e5f\u53ef\u4ee5\u5f15\u5165\u547d\u4ee4\u884c\u53c2\u6570\u3002\u5f53\u6211\u4eec\u8fd0\u884c\u5ba2\u6237\u7aef\u65f6\u76f4\u63a5\u5728\u540e\u9762\u8ddf\u4e0a\u5bf9\u5e94\u670d\u52a1\u7aef\u7684IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\u5373\u53ef\u3002<\/p>\n\n\n\n
                                            int main(int argc, char* argv[])\n{\n    if (argc != 3){\n        std::cerr << \"Usage: \" << argv[0] << \" server_ip server_port\" << std::endl;\n        return 1;\n    }\n    std::string server_ip = argv[1];\n    int server_port = atoi(argv[2]);\n    UdpClient* clt = new UdpClient(server_ip, server_port);\n    clt->InitClient();\n    clt->Start();\n    return 0;\n}<\/code><\/pre>\n\n\n\n
                                            \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cargv\u6570\u7ec4\u91cc\u9762\u5b58\u50a8\u7684\u662f\u5b57\u7b26\u4e32\uff0c\u800c\u7aef\u53e3\u53f7\u662f\u4e00\u4e2a\u6574\u6570\uff0c\u56e0\u6b64\u9700\u8981\u4f7f\u7528atoi\u51fd\u6570\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u6210\u6574\u6570\u3002\u7136\u540e\u6211\u4eec\u5c31\u53ef\u4ee5\u7528\u8fd9\u4e2aIP\u5730\u5740\u548c\u7aef\u53e3\u53f7\u6765\u6784\u9020\u5ba2\u6237\u7aef\u4e86\uff0c\u5ba2\u6237\u7aef\u6784\u9020\u5b8c\u6210\u5e76\u521d\u59cb\u5316\u540e\u5c31\u53ef\u4ee5\u8c03\u7528Start\u51fd\u6570\u542f\u52a8\u5ba2\u6237\u7aef\u4e86\u3002<\/p>\n\n\n\n
                                            \u672c\u5730\u6d4b\u8bd5<\/h3>\n\n\n\n
                                            \u73b0\u5728\u670d\u52a1\u7aef\u548c\u5ba2\u6237\u7aef\u7684\u4ee3\u7801\u90fd\u5df2\u7ecf\u7f16\u5199\u5b8c\u6bd5\uff0c\u6211\u4eec\u53ef\u4ee5\u5148\u8fdb\u884c\u672c\u5730\u6d4b\u8bd5\uff0c\u6b64\u65f6\u670d\u52a1\u5668\u6ca1\u6709\u7ed1\u5b9a\u5916\u7f51\uff0c\uff0c\u7ed1\u5b9a\u7684\u662f\u672c\u5730\u73af\u56de\u3002\u73b0\u5728\u6211\u4eec\u8fd0\u884c\u670d\u52a1\u5668\u65f6\u6307\u660e\u7aef\u53e3\u53f7\u4e3a8081\uff0c\u518d\u8fd0\u884c\u5ba2\u6237\u7aef\uff0c\u6b64\u65f6\u5ba2\u6237\u7aef\u8981\u8bbf\u95ee\u7684\u670d\u52a1\u5668\u7684IP\u5730\u5740\u5c31\u662f\u672c\u5730\u73af\u56de127.0.0.1<\/code>\uff0c\u670d\u52a1\u7aef\u7684\u7aef\u53e3\u53f7\u5c31\u662f8081\u3002<\/p>\n\n\n\n
                                            \"img\"\/<\/div><\/figure>\n\n\n\n
                                            \u5ba2\u6237\u7aef\u8fd0\u884c\u4e4b\u540e\u63d0\u793a\u6211\u4eec\u8fdb\u884c\u8f93\u5165\uff0c\u5f53\u6211\u4eec\u5728\u5ba2\u6237\u7aef\u8f93\u5165\u6570\u636e\u540e\uff0c\u5ba2\u6237\u7aef\u5c06\u6570\u636e\u53d1\u9001\u7ed9\u670d\u52a1\u7aef\uff0c\u6b64\u65f6\u670d\u52a1\u7aef\u518d\u5c06\u6536\u5230\u7684\u6570\u636e\u6253\u5370\u8f93\u51fa\uff0c\u8fd9\u65f6\u6211\u4eec\u5728\u670d\u52a1\u7aef\u7684\u7a97\u53e3\u4e5f\u770b\u5230\u6211\u4eec\u8f93\u5165\u7684\u5185\u5bb9\u3002<\/p>\n\n\n\n
                                            \"img\"\/<\/div><\/figure>\n\n\n\n
                                            \u6b64\u65f6\u6211\u4eec\u518d\u7528netstat<\/code>\u547d\u4ee4\u67e5\u770b\u7f51\u7edc\u4fe1\u606f\uff0c\u53ef\u4ee5\u770b\u5230\u670d\u52a1\u7aef\u7684\u7aef\u53e3\u662f8081\uff0c\u5ba2\u6237\u7aef\u7684\u7aef\u53e3\u662f53979\u3002\u8fd9\u91cc\u5ba2\u6237\u7aef\u80fd\u88abnetstat<\/code>\u547d\u4ee4\u67e5\u770b\u5230\uff0c\u8bf4\u660e\u5ba2\u6237\u7aef\u4e5f\u5df2\u7ecf\u52a8\u6001\u7ed1\u5b9a\u6210\u529f\u4e86\uff0c\u8fd9\u5c31\u662f\u6211\u4eec\u6240\u8c13\u7684\u7f51\u7edc\u901a\u4fe1\u3002<\/p>\n\n\n\n
                                            \"img\"\/<\/div><\/figure>\n\n\n\n
                                            INADDR_ANY<\/h3>\n\n\n\n
                                            \u73b0\u5728\u6211\u4eec\u5df2\u7ecf\u901a\u8fc7\u4e86\u672c\u5730\u6d4b\u8bd5\uff0c\u63a5\u4e0b\u6765\u5c31\u9700\u8981\u8fdb\u884c\u7f51\u7edc\u6d4b\u8bd5\u4e86\uff0c\u90a3\u662f\u4e0d\u662f\u76f4\u63a5\u8ba9\u670d\u52a1\u5668\u7ed1\u5b9a\u6211\u7684\u516c\u7f51IP\uff0c\u6b64\u65f6\u8fd9\u4e2a\u670d\u52a1\u5668\u5c31\u80fd\u591f\u88ab\u5916\u7f51\u8bbf\u95ee\u4e86\u5462\uff1f<\/p>\n\n\n\n
                                            \u7406\u8bba\u4e0a\u786e\u5b9e\u662f\u8fd9\u6837\u7684\uff0c\u5c31\u6bd4\u5982\u6211\u7684\u670d\u52a1\u5668\u7684\u516c\u7f51IP\u662f49.232.66.206<\/code>\uff0c\u8fd9\u91cc\u7528ping<\/code>\u547d\u4ee4\u4e5f\u662f\u80fd\u591fping<\/code>\u901a\u7684\u3002<\/p>\n\n\n\n
                                            \"img\"\/<\/div><\/figure>\n\n\n\n
                                            \u73b0\u5728\u6211\u5c06\u670d\u52a1\u7aef\u8bbe\u7f6e\u7684\u672c\u5730\u73af\u56de\u6539\u4e3a\u6211\u7684\u516c\u7f51IP\uff0c\u6b64\u65f6\u5f53\u6211\u4eec\u91cd\u65b0\u7f16\u8bd1\u7a0b\u5e8f\u518d\u6b21\u8fd0\u884c\u670d\u52a1\u7aef\u7684\u65f6\u5019\u4f1a\u53d1\u73b0\u670d\u52a1\u7aef\u7ed1\u5b9a\u5931\u8d25\u3002<\/p>\n\n\n\n
                                            \"img\"\/<\/div><\/figure>\n\n\n\n
                                            \u7531\u4e8e\u4e91\u670d\u52a1\u5668\u7684IP\u5730\u5740\u662f\u7531\u5bf9\u5e94\u7684\u4e91\u5382\u5546\u63d0\u4f9b\u7684\uff0c\u8fd9\u4e2aIP\u5730\u5740\u5e76\u4e0d\u4e00\u5b9a\u662f\u771f\u6b63\u7684\u516c\u7f51IP\uff0c\u8fd9\u4e2aIP\u5730\u5740\u662f\u4e0d\u80fd\u76f4\u63a5\u88ab\u7ed1\u5b9a\u7684\uff0c\u5982\u679c\u9700\u8981\u8ba9\u5916\u7f51\u8bbf\u95ee\uff0c\u6b64\u65f6\u6211\u4eec\u9700\u8981bind 0\u3002\u7cfb\u7edf\u5f53\u4e2d\u63d0\u4f9b\u7684\u4e00\u4e2aINADDR_ANY<\/code>\uff0c\u8fd9\u662f\u4e00\u4e2a\u5b8f\u503c\uff0c\u5b83\u5bf9\u5e94\u7684\u503c\u5c31\u662f0\u3002<\/p>\n\n\n\n
                                            \u56e0\u6b64\u5982\u679c\u6211\u4eec\u9700\u8981\u8ba9\u5916\u7f51\u8bbf\u95ee\uff0c\u90a3\u4e48\u5728\u4e91\u670d\u52a1\u5668\u4e0a\u8fdb\u884c\u7ed1\u5b9a\u65f6\u5c31\u5e94\u8be5\u7ed1\u5b9aINADDR_ANY<\/code>\uff0c\u6b64\u65f6\u6211\u4eec\u7684\u670d\u52a1\u5668\u624d\u80fd\u591f\u88ab\u5916\u7f51\u8bbf\u95ee\u3002<\/p>\n\n\n\n
                                            \n
                                            \u7ed1\u5b9aINADDR_ANY\u7684\u597d\u5904<\/p>\n<\/blockquote>\n\n\n\n
                                            \u5f53\u4e00\u53f0\u670d\u52a1\u5668\u7684\u5e26\u5bbd\u8db3\u591f\u5927\u65f6\uff0c\u4e00\u53f0\u673a\u5668\u63a5\u6536\u6570\u636e\u7684\u80fd\u529b\u5c31\u7ea6\u675f\u4e86\u8fd9\u53f0\u673a\u5668\u7684IO\u6548\u7387\uff0c\u56e0\u6b64\u4e00\u53f0\u670d\u52a1\u5668\u5e95\u5c42\u53ef\u80fd\u88c5\u6709\u591a\u5f20\u7f51\u5361\uff0c\u6b64\u65f6\u8fd9\u53f0\u670d\u52a1\u5668\u5c31\u53ef\u80fd\u4f1a\u6709\u591a\u4e2aIP\u5730\u5740\uff0c\u4f46\u4e00\u53f0\u670d\u52a1\u5668\u4e0a\u7aef\u53e3\u53f7\u4e3a8081\u7684\u670d\u52a1\u53ea\u6709\u4e00\u4e2a\u3002\u8fd9\u53f0\u670d\u52a1\u5668\u5728\u63a5\u6536\u6570\u636e\u65f6\uff0c\u8fd9\u91cc\u7684\u591a\u5f20\u7f51\u5361\u5728\u5e95\u5c42\u5b9e\u9645\u90fd\u6536\u5230\u4e86\u6570\u636e\uff0c\u5982\u679c\u8fd9\u4e9b\u6570\u636e\u4e5f\u90fd\u60f3\u8bbf\u95ee\u7aef\u53e3\u53f7\u4e3a8081\u7684\u670d\u52a1\u3002\u6b64\u65f6\u5982\u679c\u670d\u52a1\u7aef\u5728\u7ed1\u5b9a\u7684\u65f6\u5019\u662f\u6307\u660e\u7ed1\u5b9a\u7684\u67d0\u4e00\u4e2aIP\u5730\u5740\uff0c\u90a3\u4e48\u6b64\u65f6\u670d\u52a1\u7aef\u5728\u63a5\u6536\u6570\u636e\u7684\u65f6\u5019\u5c31\u53ea\u80fd\u4ece\u7ed1\u5b9aIP\u5bf9\u5e94\u7684\u7f51\u5361\u63a5\u6536\u6570\u636e\u3002\u800c\u5982\u679c\u670d\u52a1\u7aef\u7ed1\u5b9a\u7684\u662fINADDR_ANY<\/code>\uff0c\u90a3\u4e48\u53ea\u8981\u662f\u53d1\u9001\u7ed9\u7aef\u53e3\u53f7\u4e3a8081\u7684\u670d\u52a1\u7684\u6570\u636e\uff0c\u7cfb\u7edf\u90fd\u4f1a\u53ef\u4ee5\u5c06\u6570\u636e\u81ea\u5e95\u5411\u4e0a\u4ea4\u7ed9\u8be5\u670d\u52a1\u7aef\u3002<\/p>\n\n\n\n
                                            \"img\"\/<\/div><\/figure>\n\n\n\n
                                            \u56e0\u6b64\u670d\u52a1\u7aef\u7ed1\u5b9aINADDR_ANY<\/code>\u8fd9\u79cd\u65b9\u6848\u5f3a\u70c8\u63a8\u8350\u7684\u65b9\u6848\uff0c\u6240\u6709\u7684\u670d\u52a1\u5668\u5177\u4f53\u5728\u64cd\u4f5c\u7684\u65f6\u5019\u7528\u7684\u4e5f\u5c31\u662f\u8fd9\u79cd\u65b9\u6848\u3002<\/p>\n\n\n\n
                                            \u5f53\u7136\uff0c\u5982\u679c\u4f60\u65e2\u60f3\u8ba9\u5916\u7f51\u8bbf\u95ee\u4f60\u7684\u670d\u52a1\u5668\uff0c\u4f46\u4f60\u53c8\u6307\u5411\u7ed1\u5b9a\u67d0\u4e00\u4e2aIP\u5730\u5740\uff0c\u90a3\u4e48\u5c31\u4e0d\u80fd\u7528\u4e91\u670d\u52a1\u5668\uff0c\u6b64\u65f6\u53ef\u4ee5\u9009\u62e9\u4f7f\u7528\u865a\u62df\u673a\u6216\u8005\u4f60\u81ea\u5b9a\u4e49\u5b89\u88c5\u7684Linux\u64cd\u4f5c\u7cfb\u7edf\uff0c\u90a3\u4e2aIP\u5730\u5740\u5c31\u662f\u652f\u6301\u4f60\u7ed1\u5b9a\u7684\uff0c\u800c\u4e91\u670d\u52a1\u5668\u662f\u4e0d\u652f\u6301\u7684\u3002<\/p>\n\n\n\n
                                            \n
                                            \u66f4\u6539\u4ee3\u7801<\/p>\n<\/blockquote>\n\n\n\n
                                            \u56e0\u6b64\uff0c\u5982\u679c\u60f3\u8981\u5916\u7f51\u8bbf\u95ee\u6211\u4eec\u7684\u670d\u52a1\uff0c\u6211\u4eec\u8fd9\u91cc\u5c31\u9700\u8981\u5c06\u670d\u52a1\u5668\u7c7b\u5f53\u4e2dIP\u5730\u5740\u76f8\u5173\u7684\u4ee3\u7801\u53bb\u6389\uff0c\u800c\u5728\u586b\u5145\u7f51\u7edc\u76f8\u5173\u4fe1\u606f\u8bbe\u7f6estruct sockaddr_in<\/code>\u7ed3\u6784\u4f53\u65f6\uff0c\u5c06\u8bbe\u7f6e\u7684IP\u5730\u5740\u6539\u4e3aINADDR_ANY<\/code>\u5c31\u884c\u4e86\u3002\u7531\u4e8eINADDR_ANY<\/code>\u7684\u503c\u672c\u8d28\u5c31\u662f0\uff0c\u4e0d\u5b58\u5728\u5927\u5c0f\u7aef\u7684\u95ee\u9898\uff0c\u56e0\u6b64\u5728\u8bbe\u7f6e\u65f6\u53ef\u4ee5\u4e0d\u8fdb\u884c\u7f51\u7edc\u5b57\u8282\u5e8f\u7684\u8f6c\u6362\u3002<\/p>\n\n\n\n
                                            class UdpServer\n{\npublic:\n    bool InitServer()\n    {\n        \/\/\u521b\u5efa\u5957\u63a5\u5b57\n        _sockfd = socket(AF_INET, SOCK_DGRAM, 0);\n        if (_sockfd < 0){ \/\/\u521b\u5efa\u5957\u63a5\u5b57\u5931\u8d25\n            std::cerr << \"socket error\" << std::endl;\n            return false;\n        }\n\n        std::cout << \"socket create success, sockfd: \" << _sockfd << std::endl;\n\n        \/\/\u586b\u5145\u7f51\u7edc\u901a\u4fe1\u76f8\u5173\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; \/\/\u7ed1\u5b9aINADDR_ANY\n\n        \/\/\u7ed1\u5b9a\n        if (bind(_sockfd, (struct sockaddr*)&local, sizeof(sockaddr)) < 0){ \/\/\u7ed1\u5b9a\u5931\u8d25\n            std::cerr << \"bind error\" << std::endl;\n            return false;\n        }\n\n        std::cout << \"bind success\" << std::endl;\n\n        return true;\n    }\nprivate:\n    int _sockfd; \/\/\u6587\u4ef6\u63cf\u8ff0\u7b26\n    int _port; \/\/\u7aef\u53e3\u53f7\n    std::string _ip; \/\/IP\u5730\u5740\n};<\/code><\/pre>\n\n\n\n
                                            \u6b64\u65f6\u5f53\u6211\u4eec\u518d\u91cd\u65b0\u7f16\u8bd1\u8fd0\u884c\u670d\u52a1\u5668\u65f6\u5c31\u4e0d\u4f1a\u7ed1\u5b9a\u5931\u8d25\u4e86\uff0c\u5e76\u4e14\u6b64\u65f6\u5f53\u6211\u4eec\u518d\u7528netstat<\/code>\u547d\u4ee4\u67e5\u770b\u65f6\u4f1a\u53d1\u73b0\uff0c\u8be5\u670d\u52a1\u5668\u7684\u672c\u5730IP\u5730\u5740\u53d8\u6210\u4e860.0.0.0<\/code>\uff0c\u8fd9\u5c31\u610f\u5473\u7740\u8be5UDP\u670d\u52a1\u5668\u53ef\u4ee5\u5728\u672c\u5730\u8bfb\u53d6\u4efb\u4f55\u4e00\u5f20\u7f51\u5361\u91cc\u9762\u7684\u6570\u636e\u3002<\/p>\n\n\n\n
                                            \"img\"\/<\/div><\/figure>\n\n\n\n
                                            \u7b80\u6613\u7684\u56de\u58f0\u670d\u52a1\u5668<\/h3>\n\n\n\n
                                            \u7531\u4e8e\u5728\u8fdb\u884c\u7f51\u7edc\u6d4b\u8bd5\u7684\u65f6\u5019\uff0c\u5f53\u5ba2\u6237\u7aef\u53d1\u9001\u6570\u636e\u7ed9\u670d\u52a1\u7aef\u65f6\uff0c\u670d\u52a1\u7aef\u4f1a\u5c06\u4ece\u5ba2\u6237\u7aef\u6536\u5230\u7684\u6570\u636e\u8fdb\u884c\u6253\u5370\uff0c\u56e0\u6b64\u670d\u52a1\u7aef\u662f\u80fd\u591f\u770b\u5230\u73b0\u8c61\u7684\u3002\u4f46\u5ba2\u6237\u7aef\u4e00\u76f4\u5728\u5411\u670d\u52a1\u7aef\u53d1\u9001\u6570\u636e\uff0c\u5728\u5ba2\u6237\u7aef\u8fd9\u8fb9\u770b\u4e0d\u51fa\u670d\u52a1\u7aef\u662f\u5426\u6536\u5230\u4e86\u81ea\u5df1\u53d1\u9001\u7684\u6570\u636e\u3002<\/p>\n\n\n\n
                                            \n
                                            \u670d\u52a1\u7aef\u4ee3\u7801\u7f16\u5199<\/p>\n<\/blockquote>\n\n\n\n
                                            \u9274\u4e8e\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u8be5\u670d\u52a1\u5668\u6539\u6210\u4e00\u4e2a\u7b80\u5355\u7684\u56de\u58f0\u670d\u52a1\u5668\u3002\u5f53\u670d\u52a1\u7aef\u6536\u5230\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u6570\u636e\u540e\uff0c\u9664\u4e86\u5728\u670d\u52a1\u7aef\u8fdb\u884c\u6253\u5370\u4ee5\u5916\uff0c\u670d\u52a1\u7aef\u53ef\u4ee5\u8c03\u7528sendto\u51fd\u6570\u5c06\u6536\u5230\u7684\u6570\u636e\u91cd\u65b0\u53d1\u9001\u7ed9\u5bf9\u5e94\u7684\u5ba2\u6237\u7aef\u3002<\/p>\n\n\n\n
                                            \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u670d\u52a1\u7aef\u5728\u8c03\u7528sendto\u51fd\u6570\u65f6\u9700\u8981\u4f20\u5165\u5ba2\u6237\u7aef\u7684\u7f51\u7edc\u5c5e\u6027\u4fe1\u606f\uff0c\u4f46\u670d\u52a1\u7aef\u73b0\u5728\u662f\u77e5\u9053\u5ba2\u6237\u7aef\u7684\u7f51\u7edc\u5c5e\u6027\u4fe1\u606f\u7684\uff0c\u56e0\u4e3a\u670d\u52a1\u7aef\u5728\u6b64\u4e4b\u524d\u5c31\u5df2\u7ecf\u901a\u8fc7recvfrom\u51fd\u6570\u83b7\u53d6\u5230\u4e86\u5ba2\u6237\u7aef\u7684\u7f51\u7edc\u5c5e\u6027\u4fe1\u606f\u3002<\/p>\n\n\n\n
                                            void Start()\n{\n#define SIZE 128\n    char buffer[SIZE];\n    for (;;){\n        struct sockaddr_in peer;\n        socklen_t len = sizeof(peer);\n        ssize_t size = recvfrom(_sockfd, buffer, sizeof(buffer)-1, 0, (struct sockaddr*)&peer, &len);\n        if (size > 0){\n            buffer[size] = '\\0';\n            int port = ntohs(peer.sin_port);\n            std::string ip = inet_ntoa(peer.sin_addr);\n            std::cout << ip << \":\" << port << \"# \" << buffer << std::endl;\n        }\n        else{\n            std::cerr << \"recvfrom error\" << std::endl;\n        }\n\n        std::string echo_msg = \"server get!->\";\n        echo_msg += buffer;\n        sendto(_sockfd, echo_msg.c_str(), echo_msg.size(), 0, (struct sockaddr*)&peer, len);\n    }\n}<\/code><\/pre>\n\n\n\n
                                            \n
                                            \u5ba2\u6237\u7aef\u4ee3\u7801\u7f16\u5199<\/p>\n<\/blockquote>\n\n\n\n
                                            \u670d\u52a1\u7aef\u7684\u4ee3\u7801\u6539\u4e86\u4e4b\u540e\uff0c\u5bf9\u5e94\u5ba2\u6237\u7aef\u7684\u4ee3\u7801\u4e5f\u5f97\u6539\u6539\u3002\u5f53\u5ba2\u6237\u7aef\u53d1\u9001\u5b8c\u6570\u636e\u7ed9\u670d\u52a1\u7aef\u540e\uff0c\u7531\u4e8e\u670d\u52a1\u7aef\u8fd8\u4f1a\u5c06\u8be5\u6570\u636e\u91cd\u65b0\u53d1\u7ed9\u5ba2\u6237\u7aef\uff0c\u56e0\u6b64\u5ba2\u6237\u7aef\u53d1\u5b8c\u6570\u636e\u540e\u8fd8\u9700\u8981\u8c03\u7528recvfrom\u6765\u8bfb\u53d6\u670d\u52a1\u7aef\u53d1\u6765\u7684\u54cd\u5e94\u6570\u636e\u3002<\/p>\n\n\n\n
                                            \u5728\u5ba2\u6237\u7aef\u8c03\u7528recvfrom\u51fd\u6570\u63a5\u53d7\u670d\u52a1\u7aef\u53d1\u6765\u7684\u54cd\u5e94\u6570\u636e\u65f6\uff0c\u5ba2\u6237\u7aef\u540c\u65f6\u4e5f\u9700\u8981\u8bfb\u53d6\u670d\u52a1\u7aef\u4e0e\u7f51\u7edc\u76f8\u5173\u7684\u5404\u79cd\u95ee\u9898\u3002\u867d\u7136\u5ba2\u6237\u7aef\u65e9\u5df2\u77e5\u9053\u670d\u52a1\u7aef\u7684\u7f51\u7edc\u4fe1\u606f\u4e86\uff0c\u6b64\u65f6\u670d\u52a1\u7aef\u7684\u7f51\u7edc\u4fe1\u606f\u5df2\u7ecf\u4e0d\u91cd\u8981\u4e86\uff0c\u4f46\u8fd8\u662f\u5efa\u8bae\u4e0d\u8981\u628a\u53c2\u6570\u8bbe\u7f6e\u4e3a\u7a7a\uff0c\u8fd9\u6837\u53ef\u80fd\u4f1a\u51fa\u95ee\u9898\uff0c\u6240\u4ee5\u6211\u4eec\u8fd8\u662f\u7528\u4e00\u4e2a\u4e34\u65f6\u53d8\u91cf\u5c06\u670d\u52a1\u7aef\u7684\u7f51\u7edc\u4fe1\u606f\u8bfb\u53d6\u4e00\u4e0b\u3002<\/p>\n\n\n\n
                                            \u800c\u5ba2\u6237\u7aef\u63a5\u6536\u5230\u670d\u52a1\u7aef\u7684\u54cd\u5e94\u6570\u636e\u540e\uff0c\u5c06\u6570\u636e\u539f\u5c01\u4e0d\u52a8\u7684\u6253\u5370\u51fa\u6765\u5c31\u884c\u4e86\u3002\u6b64\u65f6\u5ba2\u6237\u7aef\u53d1\u9001\u7ed9\u670d\u52a1\u7aef\u7684\u6570\u636e\uff0c\u9664\u4e86\u5728\u670d\u52a1\u7aef\u4f1a\u6253\u5370\u663e\u793a\u4ee5\u5916\uff0c\u670d\u52a1\u7aef\u8fd8\u4f1a\u5c06\u6570\u636e\u518d\u91cd\u65b0\u53d1\u56de\u7ed9\u5ba2\u6237\u7aef\uff0c\u6b64\u65f6\u5ba2\u6237\u7aef\u4e5f\u4f1a\u63a5\u6536\u5230\u54cd\u5e94\u6570\u636e\u7136\u540e\u5c06\u8be5\u6570\u636e\u8fdb\u884c\u6253\u5370\u3002<\/p>\n\n\n\n
                                            void Start()\n{\n    std::string msg;\n    struct sockaddr_in peer;\n    memset(&peer, '\\0', sizeof(peer));\n    peer.sin_family = AF_INET;\n    peer.sin_port = htons(_server_port);\n    peer.sin_addr.s_addr = inet_addr(_server_ip.c_str());\n\n    for (;;){\n        std::cout << \"Please Enter# \";\n        getline(std::cin, msg);\n        sendto(_sockfd, msg.c_str(), msg.size(), 0, (struct sockaddr*)&peer, sizeof(peer));\n\n#define SIZE 128\n        char buffer[SIZE];\n        struct sockaddr_in tmp;\n        socklen_t len = sizeof(tmp);\n        ssize_t size = recvfrom(_sockfd, buffer, sizeof(buffer)-1, 0, (struct sockaddr*)&tmp, &len);\n        if (size > 0){\n            buffer[size] = '\\0';\n            std::cout << buffer << std::endl;\n        }\n    }\n}<\/code><\/pre>\n\n\n\n
                                            \u6b64\u65f6\u5f53\u6211\u4eec\u6d4b\u8bd5\u56de\u58f0\u670d\u52a1\u5668\u65f6\uff0c\u5728\u670d\u52a1\u7aef\u548c\u5ba2\u6237\u7aef\u5c31\u90fd\u80fd\u591f\u770b\u5230\u5bf9\u5e94\u7684\u73b0\u8c61\uff0c\u8fd9\u6837\u5c31\u80fd\u591f\u5224\u65ad\u901a\u4fe1\u662f\u5426\u6b63\u5e38\u4e86\u3002<\/p>\n\n\n\n
                                            \"img\"\/<\/div><\/figure>\n\n\n\n
                                            \u7f51\u7edc\u6d4b\u8bd5<\/h3>\n\n\n\n
                                            \n
                                            \u9759\u6001\u7f16\u8bd1\u5ba2\u6237\u7aef<\/p>\n<\/blockquote>\n\n\n\n
                                            \u6211\u4eec\u53ef\u4ee5\u5c06\u751f\u6210\u7684\u5ba2\u6237\u7aef\u7684\u53ef\u6267\u884c\u7a0b\u5e8f\u53d1\u9001\u7ed9\u4f60\u7684\u5176\u4ed6\u670b\u53cb\uff0c\u8fdb\u884c\u7f51\u7edc\u7ea7\u522b\u7684\u6d4b\u8bd5\u3002\u4e3a\u4e86\u4fdd\u8bc1\u7a0b\u5e8f\u5728\u4f60\u4eec\u7684\u673a\u5668\u662f\u4e25\u683c\u4e00\u81f4\u7684\uff0c\u53ef\u4ee5\u9009\u62e9\u5728\u7f16\u8bd1\u5ba2\u6237\u7aef\u65f6\u643a\u5e26-static<\/code>\u9009\u9879\u8fdb\u884c\u9759\u6001\u7f16\u8bd1\u3002<\/p>\n\n\n\n
                                            \"img\"\/<\/div><\/figure>\n\n\n\n
                                            \u6b64\u65f6\u7531\u4e8e\u5ba2\u6237\u7aef\u662f\u9759\u6001\u7f16\u8bd1\u7684\uff0c\u53ef\u4ee5\u770b\u5230\u751f\u6210\u7684\u5ba2\u6237\u7aef\u7684\u53ef\u6267\u884c\u7a0b\u5e8f\u8981\u6bd4\u670d\u52a1\u7aef\u5927\u5f97\u591a\u3002<\/p>\n\n\n\n
                                            \"img\"\/<\/div><\/figure>\n\n\n\n
                                            \n
                                            \u5206\u53d1\u5ba2\u6237\u7aef<\/p>\n<\/blockquote>\n\n\n\n
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