{"id":59009,"date":"2025-04-23T13:19:36","date_gmt":"2025-04-23T05:19:36","guid":{"rendered":"https:\/\/fwq.ai\/blog\/?p=59009"},"modified":"2025-04-23T17:27:52","modified_gmt":"2025-04-23T09:27:52","slug":"%e6%8e%a2%e7%b4%a2-linux-%e5%86%85%e6%a0%b8%e4%b8%ad-socket-%e7%9a%84%e5%ba%95%e5%b1%82%e5%ae%9e%e7%8e%b0%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/59009\/","title":{"rendered":"\u63a2\u7d22 Linux \u5185\u6838\u4e2d socket \u7684\u5e95\u5c42\u5b9e\u73b0\u539f\u7406"},"content":{"rendered":"<p><strong>Socket \u7f16\u7a0b\u8be6\u89e3\uff1a\u5b9e\u73b0\u9ad8\u6548\u7684\u7f51\u7edc\u901a\u4fe1<\/strong><\/p>\n<h3>\u4e00\u3001Socket \u7684\u6982\u5ff5<\/h3>\n<p>\u5728\u7f51\u7edc\u7f16\u7a0b\u4e2d\uff0cSocket \u88ab\u6bd4\u4f5c\u7f51\u7edc\u901a\u4fe1\u4e2d\u7684\u201c\u63d2\u5934\u548c\u63d2\u5ea7\u201d\uff0c\u5b83\u662f\u7528\u4e8e\u4e0d\u540c\u8bbe\u5907\u4e4b\u95f4\u8fdb\u884c\u6570\u636e\u4ea4\u6362\u7684\u63a5\u53e3\u3002\u6211\u4eec\u53ef\u4ee5\u628a\u5b83\u770b\u4f5c\u662f\u4e00\u79cd\u5b9e\u73b0\u7f51\u7edc\u901a\u4fe1\u7684\u673a\u5236\u3002\u5c31\u50cf\u5728\u65e5\u5e38\u751f\u6d3b\u4e2d\uff0c\u63d2\u5934\u63d2\u5165\u63d2\u5ea7\u540e\u7535\u6d41\u5f97\u4ee5\u6d41\u901a\uff0c\u7f51\u7edc\u4e2d\u7684\u6570\u636e\u4e5f\u901a\u8fc7 Socket \u5728\u4e0d\u540c\u7684\u8bbe\u5907\u548c\u7a0b\u5e8f\u4e4b\u95f4\u6d41\u52a8\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5728\u7f51\u4e0a\u804a\u5929\u65f6\uff0c\u53d1\u9001\u65b9\u901a\u8fc7 Socket \u5c06\u6d88\u606f\u53d1\u9001\u51fa\u53bb\uff0c\u63a5\u6536\u65b9\u901a\u8fc7\u76f8\u5e94\u7684 Socket \u63a5\u6536\u6d88\u606f\uff1b\u53c8\u5982\u5728\u4e0b\u8f7d\u6587\u4ef6\u65f6\uff0c\u4e0b\u8f7d\u7a0b\u5e8f\u4e0e\u6587\u4ef6\u670d\u52a1\u5668\u901a\u8fc7 Socket \u5efa\u7acb\u8fde\u63a5\uff0c\u4ece\u670d\u52a1\u5668\u83b7\u53d6\u6240\u9700\u7684\u6587\u4ef6\u6570\u636e\u3002<\/p>\n<h3>\u4e8c\u3001Socket \u7684\u4f7f\u7528\u573a\u666f<\/h3>\n<p>Socket \u662f\u5b9e\u73b0\u8ba1\u7b97\u673a\u4e4b\u95f4\u901a\u4fe1\u7684\u6838\u5fc3\u5de5\u5177\u3002\u65e0\u8bba\u662f\u901a\u8fc7 TCP \u8fd8\u662f UDP \u534f\u8bae\uff0cSocket \u90fd\u80fd\u63d0\u4f9b\u4e00\u4e2a\u53ef\u9760\u6216\u8005\u4e0d\u53ef\u9760\u7684\u6570\u636e\u4f20\u8f93\u901a\u9053\u3002\u5728\u521d\u5b66\u8005\u4e2d\uff0cTCP \u534f\u8bae\u7531\u4e8e\u5176\u53ef\u9760\u6027\u5e38\u5e38\u662f\u9996\u9009\u3002<\/p>\n<h4>\u793a\u4f8b\uff1a\u4f7f\u7528 TCP \u534f\u8bae\u5efa\u7acb\u8fde\u63a5<\/h4>\n<pre><code class=\"language-cpp\">#include &lt;iostream&gt;\r\n#include &lt;sys\/socket.h&gt;\r\n#include &lt;netinet\/in.h&gt;\r\n#include &lt;arpa\/inet.h&gt;\r\n\r\nint main() {\r\n    int sock_fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);\r\n    if (sock_fd == -1) {\r\n        std::cerr &lt;&lt; \"Failed to create socket\" &lt;&lt; std::endl;\r\n        return 1;\r\n    }\r\n\r\n    \/\/ \u540e\u7eed\u4ee3\u7801...\r\n    return 0;\r\n}\r\n<\/code><\/pre>\n<p>\u901a\u8fc7\u4e0a\u8ff0\u4ee3\u7801\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a TCP \u534f\u8bae\u7684 Socket\u3002\u63a5\u4e0b\u6765\uff0c\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\u53ef\u4ee5\u901a\u8fc7 <code>bind()<\/code>\u3001<code>listen()<\/code>\u3001<code>accept()<\/code> \u548c <code>connect()<\/code> \u65b9\u6cd5\u6765\u8fdb\u884c\u8fde\u63a5\uff0c\u5b8c\u6210\u4e09\u6b21\u63e1\u624b\u540e\uff0c\u53cc\u65b9\u53ef\u4ee5\u5f00\u59cb\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u3002<\/p>\n<h3>\u4e09\u3001Socket \u7684\u8bbe\u8ba1<\/h3>\n<p>Socket \u7f16\u7a0b\u7684\u8bbe\u8ba1\u8003\u8651\u4e86\u591a\u4e2a\u56e0\u7d20\uff0c\u4e3b\u8981\u5305\u62ec IP \u5730\u5740\u548c\u7aef\u53e3\u7684\u7ba1\u7406\uff0c\u534f\u8bae\u7684\u9009\u62e9\uff08TCP \u6216 UDP\uff09\u4ee5\u53ca\u6570\u636e\u7684\u4f20\u8f93\u65b9\u5f0f\u3002\u4e3a\u4e86\u652f\u6301\u8fd9\u4e9b\u529f\u80fd\uff0c\u5185\u6838\u4e2d\u5b9a\u4e49\u4e86\u591a\u4e2a\u6570\u636e\u7ed3\u6784\uff0c\u4f8b\u5982 <code>sock<\/code>\u3001<code>inet_sock<\/code>\u3001<code>inet_connection_sock<\/code> \u7b49\u3002<\/p>\n<ul>\n<li><code>sock<\/code> \u662f\u57fa\u7840\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5b58\u50a8\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u7684\u7f13\u51b2\u533a\u3002<\/li>\n<li><code>inet_sock<\/code> \u5728 <code>sock<\/code> \u57fa\u7840\u4e0a\u589e\u52a0\u4e86\u7f51\u7edc\u76f8\u5173\u5b57\u6bb5\uff0c\u5982 IP \u5730\u5740\u548c\u7aef\u53e3\u3002<\/li>\n<li><code>inet_connection_sock<\/code> \u4e13\u7528\u4e8e\u9762\u5411\u8fde\u63a5\u7684\u534f\u8bae\uff0c\u5982 TCP\uff0c\u52a0\u5165\u4e86\u66f4\u591a\u5173\u4e8e\u8fde\u63a5\u7684\u4fe1\u606f\u3002<\/li>\n<\/ul>\n<p>\u8fd9\u4e9b\u6570\u636e\u7ed3\u6784\u7684\u8bbe\u8ba1\u4f7f\u5f97\u64cd\u4f5c\u7cfb\u7edf\u80fd\u591f\u9ad8\u6548\u5730\u7ba1\u7406\u7f51\u7edc\u901a\u4fe1\uff0c\u5e76\u652f\u6301\u6269\u5c55\u65b0\u7684\u534f\u8bae\u3002<\/p>\n<h3>\u56db\u3001Socket \u5c42\u7684\u62bd\u8c61<\/h3>\n<p>\u4e3a\u4e86\u5c06\u590d\u6742\u7684\u7f51\u7edc\u7f16\u7a0b\u7b80\u5316\uff0cSocket \u5c42\u901a\u8fc7\u62bd\u8c61\u63a5\u53e3\u4f7f\u7528\u6237\u7a0b\u5e8f\u80fd\u591f\u8f7b\u677e\u4f7f\u7528\u7f51\u7edc\u529f\u80fd\u3002\u6bcf\u6b21\u521b\u5efa Socket \u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u4e3a\u5176\u5206\u914d\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26 <code>sock_fd<\/code>\uff0c\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7\u8be5\u63cf\u8ff0\u7b26\u8fdb\u884c\u7f51\u7edc\u64cd\u4f5c\uff0c\u5982\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u3002<\/p>\n<p>\u8fd9\u4e9b\u64cd\u4f5c\u5b9e\u9645\u4e0a\u662f\u5728\u5185\u6838\u7a7a\u95f4\u6267\u884c\u7684\uff0cSocket \u5c42\u4e3a\u5e94\u7528\u7a0b\u5e8f\u63d0\u4f9b\u4e86\u4e00\u7ec4\u7b80\u5355\u7684\u63a5\u53e3\uff0c\u5982 <code>send()<\/code>\u3001<code>recv()<\/code>\u3001<code>bind()<\/code>\u3001<code>listen()<\/code>\u3001<code>connect()<\/code> \u7b49\uff0c\u8fd9\u4e9b\u63a5\u53e3\u9690\u85cf\u4e86\u590d\u6742\u7684\u5185\u6838\u64cd\u4f5c\uff0c\u8ba9\u5f00\u53d1\u8005\u80fd\u591f\u4e13\u6ce8\u4e8e\u5e94\u7528\u903b\u8f91\u3002<\/p>\n<h3>\u4e94\u3001Socket \u5982\u4f55\u5b9e\u73b0\u7f51\u7edc\u901a\u4fe1<\/h3>\n<p>\u5b9e\u73b0\u7f51\u7edc\u4f20\u8f93\u529f\u80fd\u7684\u57fa\u672c\u6d41\u7a0b\u5305\u62ec\u8fde\u63a5\u5efa\u7acb\u548c\u6570\u636e\u4f20\u8f93\u4e24\u5927\u90e8\u5206\u3002<\/p>\n<ol>\n<li><strong>\u8fde\u63a5\u5efa\u7acb<\/strong>\n<ul>\n<li>\u5ba2\u6237\u7aef\u901a\u8fc7 <code>connect()<\/code> \u65b9\u6cd5\u53d1\u8d77\u4e09\u6b21\u63e1\u624b\uff0c\u4e0e\u670d\u52a1\u7aef\u5efa\u7acb\u8fde\u63a5\u3002<\/li>\n<li>\u670d\u52a1\u7aef\u901a\u8fc7 <code>listen()<\/code> \u548c <code>accept()<\/code> \u65b9\u6cd5\u63a5\u6536\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42\uff0c\u5e76\u8fdb\u5165\u5168\u8fde\u63a5\u72b6\u6001\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u6570\u636e\u4f20\u8f93<\/strong>\n<ul>\n<li>\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\u901a\u8fc7\u53d1\u9001\u548c\u63a5\u6536\u7f13\u51b2\u533a\u5b9e\u73b0\u6570\u636e\u4f20\u8f93\u3002\u53d1\u9001\u6570\u636e\u65f6\uff0c\u6570\u636e\u88ab\u653e\u5165\u53d1\u9001\u7f13\u51b2\u533a\uff0c\u7b49\u5f85\u5185\u6838\u5c06\u5176\u53d1\u9001\u5230\u7f51\u7edc\uff1b\u63a5\u6536\u6570\u636e\u65f6\uff0c\u6570\u636e\u88ab\u5b58\u653e\u5728\u63a5\u6536\u7f13\u51b2\u533a\uff0c\u7b49\u5f85\u5e94\u7528\u7a0b\u5e8f\u8bfb\u53d6\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h3>\u516d\u3001Socket \u7684\u201c\u7ee7\u627f\u201d\u673a\u5236<\/h3>\n<p>\u867d\u7136 C \u8bed\u8a00\u672c\u8eab\u4e0d\u652f\u6301\u7ee7\u627f\uff0c\u4f46 Linux \u5185\u6838\u901a\u8fc7\u7ed3\u6784\u4f53\u7684\u5d4c\u5957\u5b9e\u73b0\u4e86\u7c7b\u4f3c\u7684\u529f\u80fd\u3002\u4f8b\u5982\uff0c<code>tcp_sock<\/code> \u7ee7\u627f\u4e86 <code>inet_connection_sock<\/code>\uff0c\u540e\u8005\u53c8\u7ee7\u627f\u4e86 <code>inet_sock<\/code>\uff0c\u5f62\u6210\u4e86\u4e00\u79cd\u5c42\u6b21\u5316\u7684\u8bbe\u8ba1\uff0c\u4f7f\u5f97\u4e0d\u540c\u534f\u8bae\u4e4b\u95f4\u80fd\u591f\u5171\u4eab\u516c\u5171\u7684\u529f\u80fd\u3002<\/p>\n<p>\u8fd9\u79cd\u8bbe\u8ba1\u901a\u8fc7\u5185\u5b58\u5e03\u5c40\u7684\u8fde\u7eed\u6027\uff0c\u5b9e\u73b0\u4e86\u7c7b\u4f3c\u7ee7\u627f\u7684\u6548\u679c\uff0c\u5927\u5927\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u590d\u7528\u6027\u548c\u53ef\u6269\u5c55\u6027\u3002<\/p>\n<h3>\u4e03\u3001\u603b\u7ed3<\/h3>\n<p>Socket \u662f\u5b9e\u73b0\u8ba1\u7b97\u673a\u7f51\u7edc\u901a\u4fe1\u7684\u6838\u5fc3\u673a\u5236\uff0c\u5b83\u901a\u8fc7\u5185\u6838\u4e2d\u7684\u6570\u636e\u7ed3\u6784 <code>sock<\/code> \u548c\u7528\u6237\u7a7a\u95f4\u4e2d\u7684 <code>sock_fd<\/code> \u63d0\u4f9b\u4e86\u4e00\u4e2a\u7b80\u6d01\u7684\u63a5\u53e3\uff0c\u5e2e\u52a9\u5f00\u53d1\u8005\u9ad8\u6548\u5730\u8fdb\u884c\u7f51\u7edc\u7f16\u7a0b\u3002\u65e0\u8bba\u662f\u901a\u8fc7 TCP \u8fd8\u662f UDP \u534f\u8bae\uff0cSocket \u90fd\u80fd\u6709\u6548\u5730\u5b9e\u73b0\u4e0d\u540c\u8bbe\u5907\u4e4b\u95f4\u7684\u6570\u636e\u4f20\u8f93\u3002<\/p>\n<p>\u5982\u679c\u4f60\u6b63\u5728\u5bfb\u627e\u7a33\u5b9a\u4e14\u9ad8\u6548\u7684\u7f51\u7edc\u670d\u52a1\u5668\u89e3\u51b3\u65b9\u6848\uff0c\u4e0d\u59a8\u9009\u62e9\u7f8e\u56fd\u670d\u52a1\u5668\u3002\u901a\u8fc7\u7f8e\u56fd\u670d\u52a1\u5668\uff0c\u4f60\u53ef\u4ee5\u83b7\u5f97\u5f3a\u5927\u7684\u7f51\u7edc\u6027\u80fd\u3001\u7075\u6d3b\u7684\u914d\u7f6e\u9009\u9879\u4ee5\u53ca\u53ef\u9760\u7684\u6280\u672f\u652f\u6301\uff0c\u9002\u7528\u4e8e\u5404\u79cd\u7f51\u7edc\u901a\u4fe1\u548c\u6570\u636e\u5904\u7406\u9700\u6c42\u3002<\/p>\n<p>\u6b32\u4e86\u89e3\u66f4\u591a\u5173\u4e8e <strong>\u7f8e\u56fd\u670d\u52a1\u5668<\/strong> \u7684\u4fe1\u606f\uff0c\u6b22\u8fce\u8bbf\u95ee<a href=\"https:\/\/fwq.ai\/\">\u7f8e\u4e91<\/a>\uff0c\u6211\u4eec\u4e3a\u60a8\u63d0\u4f9b\u6700\u5408\u9002\u7684\u670d\u52a1\u5668\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Socket \u7f16\u7a0b\u8be6\u89e3\uff1a\u5b9e\u73b0\u9ad8\u6548\u7684\u7f51\u7edc\u901a\u4fe1 \u4e00\u3001Socket \u7684\u6982\u5ff5 \u5728\u7f51\u7edc\u7f16\u7a0b\u4e2d\uff0cSocket \u88ab\u6bd4\u4f5c\u7f51\u7edc\u901a\u4fe1\u4e2d\u7684\u201c\u63d2\u5934\u548c\u63d2\u5ea7\u201d\uff0c\u5b83\u662f\u7528\u4e8e\u4e0d\u540c\u8bbe\u5907\u4e4b\u95f4\u8fdb\u884c\u6570\u636e\u4ea4\u6362\u7684\u63a5\u53e3\u3002\u6211\u4eec\u53ef\u4ee5\u628a\u5b83\u770b\u4f5c\u662f\u4e00\u79cd\u5b9e\u73b0\u7f51\u7edc\u901a\u4fe1\u7684\u673a\u5236\u3002\u5c31\u50cf\u5728\u65e5\u5e38\u751f\u6d3b\u4e2d\uff0c\u63d2\u5934\u63d2\u5165\u63d2\u5ea7\u540e\u7535\u6d41\u5f97\u4ee5\u6d41\u901a\uff0c\u7f51\u7edc\u4e2d\u7684\u6570\u636e\u4e5f\u901a\u8fc7 Socket \u5728\u4e0d\u540c\u7684\u8bbe\u5907\u548c\u7a0b\u5e8f\u4e4b\u95f4\u6d41\u52a8\u3002 \u4f8b\u5982\uff0c\u5728\u7f51\u4e0a\u804a\u5929\u65f6\uff0c\u53d1\u9001\u65b9\u901a\u8fc7 Socket \u5c06\u6d88\u606f\u53d1\u9001\u51fa\u53bb\uff0c\u63a5\u6536\u65b9\u901a\u8fc7\u76f8\u5e94\u7684 Socket \u63a5\u6536\u6d88\u606f\uff1b\u53c8\u5982\u5728\u4e0b\u8f7d\u6587\u4ef6\u65f6\uff0c\u4e0b\u8f7d\u7a0b\u5e8f\u4e0e\u6587\u4ef6\u670d\u52a1\u5668\u901a\u8fc7 Socket \u5efa\u7acb\u8fde\u63a5\uff0c\u4ece\u670d\u52a1\u5668\u83b7\u53d6\u6240\u9700\u7684\u6587\u4ef6\u6570\u636e\u3002 \u4e8c\u3001Socket \u7684\u4f7f\u7528\u573a\u666f Socket \u662f\u5b9e\u73b0\u8ba1\u7b97\u673a\u4e4b\u95f4\u901a\u4fe1\u7684\u6838\u5fc3\u5de5\u5177\u3002\u65e0\u8bba\u662f\u901a\u8fc7 TCP \u8fd8\u662f UDP \u534f\u8bae\uff0cSocket \u90fd\u80fd\u63d0\u4f9b\u4e00\u4e2a\u53ef\u9760\u6216\u8005\u4e0d\u53ef\u9760\u7684\u6570\u636e\u4f20\u8f93\u901a\u9053\u3002\u5728\u521d\u5b66\u8005\u4e2d\uff0cTCP \u534f\u8bae\u7531\u4e8e\u5176\u53ef\u9760\u6027\u5e38\u5e38\u662f\u9996\u9009\u3002 \u793a\u4f8b\uff1a\u4f7f\u7528 TCP \u534f\u8bae\u5efa\u7acb\u8fde\u63a5 #include &lt;iostream&gt; #include &lt;sys\/socket.h&gt; #include &lt;netinet\/in.h&gt; #include &lt;arpa\/inet.h&gt; int main() { int sock_fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (sock_fd == -1) { std::cerr &lt;&lt; &#8220;Failed to create 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