{"id":30127,"date":"2025-04-20T16:46:00","date_gmt":"2025-04-20T08:46:00","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/30127.html"},"modified":"2025-04-20T16:46:00","modified_gmt":"2025-04-20T08:46:00","slug":"tcp%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%ae%9e%e7%8e%b0%e9%ab%98%e5%b9%b6%e5%8f%91%e6%96%b9%e6%b3%95%ef%bc%9a%e5%a4%9a%e7%ba%bf%e7%a8%8b%e8%bf%9b%e7%a8%8b%ef%bc%8cselectpollepoll%ef%bc%8cio%e5%a4%9a","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/30127.html","title":{"rendered":"TCP\u670d\u52a1\u5668\u5b9e\u73b0\u9ad8\u5e76\u53d1\u65b9\u6cd5\uff1a\u591a\u7ebf\u7a0b\u8fdb\u7a0b\uff0cselect,poll,epoll\uff0cIO\u591a\u8def\u590d\u7528\uff0c\u6700\u8be6\u7ec6\u7684\u6982\u5ff5+\u4ee3\u7801\u96c6\u5408"},"content":{"rendered":"<\/p>\n<h4>TCP\u670d\u52a1\u5668\u5b9e\u73b0\u9ad8\u5e76\u53d1\u65b9\u6cd5&#xff1a;\u591a\u7ebf\u7a0b\u8fdb\u7a0b&#xff0c;select,poll,epoll&#xff0c;IO\u591a\u8def\u590d\u7528<\/h4>\n<ul>\n<li>\u5199\u5728\u524d\u9762<\/li>\n<li>\u4e00\u3001\u4ec0\u4e48\u662f\u9ad8\u5e76\u53d1<\/li>\n<li>\u4e8c\u3001\u591a\u8fdb\u7a0b\u5b9e\u73b0\u9ad8\u5e76\u53d1<\/li>\n<li>\n<ul>\n<li>1. \u6982\u5ff5\u90e8\u5206<\/li>\n<li>2. \u4ee3\u7801\u90e8\u5206<\/li>\n<\/ul>\n<\/li>\n<li>\u4e09\u3001\u591a\u7ebf\u7a0b\u5b9e\u73b0\u9ad8\u5e76\u53d1<\/li>\n<li>\n<ul>\n<li>1. \u6982\u5ff5\u90e8\u5206<\/li>\n<li>2.\u4ee3\u7801\u90e8\u5206<\/li>\n<\/ul>\n<\/li>\n<li>\u56db\u3001select\u5b9e\u73b0\u9ad8\u5e76\u53d1<\/li>\n<li>\n<ul>\n<li>1. \u6982\u5ff5\u90e8\u5206<\/li>\n<li>2. \u4ee3\u7801\u90e8\u5206<\/li>\n<\/ul>\n<\/li>\n<li>\u4e94\u3001epoll\u5b9e\u73b0\u9ad8\u5e76\u53d1<\/li>\n<li>\n<ul>\n<li>1. \u6982\u5ff5\u90e8\u5206<\/li>\n<li>2. \u4ee3\u7801\u90e8\u5206<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>\u5199\u5728\u524d\u9762<\/h2>\n<p>\u907f\u514dtime_wait\u72b6\u6001,setsockopt\u51fd\u6570<\/p>\n<p><span class=\"token keyword\">int<\/span> opt <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> ret <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">setsockopt<\/span><span class=\"token punctuation\">(<\/span>\u5957\u63a5\u5b57<span class=\"token punctuation\">,<\/span> SOL_SOCKET<span class=\"token punctuation\">,<\/span> SO_REUSEADDR<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>opt<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span> opt<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>ret <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;setsockopt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5ba2\u6237\u7aef\u4ee3\u7801<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;stdlib.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;string.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;assert.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;sys\/socket.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;sys\/types.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;netinet\/in.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;unistd.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;arpa\/inet.h&gt;<\/span><\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> sockfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">socket<\/span><span class=\"token punctuation\">(<\/span>AF_INET<span class=\"token punctuation\">,<\/span>SOCK_STREAM<span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>sockfd <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sockfd err\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> saddr<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>saddr<span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>saddr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    saddr<span class=\"token punctuation\">.<\/span>sin_family <span class=\"token operator\">&#061;<\/span> AF_INET<span class=\"token punctuation\">;<\/span><br \/>\n    saddr<span class=\"token punctuation\">.<\/span>sin_port <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">htons<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">8000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    saddr<span class=\"token punctuation\">.<\/span>sin_addr<span class=\"token punctuation\">.<\/span>s_addr <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">inet_addr<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;127.0.0.1&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">int<\/span> res <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">connect<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>saddr<span class=\"token punctuation\">,<\/span><span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>saddr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>res <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;connect err\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">char<\/span> buff<span class=\"token punctuation\">[<\/span><span class=\"token number\">128<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8f93\u5165:\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">fgets<\/span><span class=\"token punctuation\">(<\/span>buff<span class=\"token punctuation\">,<\/span><span class=\"token number\">128<\/span><span class=\"token punctuation\">,<\/span><span class=\"token constant\">stdin<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">,<\/span>buff<span class=\"token punctuation\">,<\/span><span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>buff<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span>buff<span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>buff<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">recv<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">,<\/span>buff<span class=\"token punctuation\">,<\/span><span class=\"token number\">127<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;recv &#061; %s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span>buff<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h2>\u4e00\u3001\u4ec0\u4e48\u662f\u9ad8\u5e76\u53d1<\/h2>\n<p>\u5bf9\u4e8e\u7f51\u7edc\u901a\u4fe1\u65b9\u9762&#xff0c;\u901a\u4fd7\u7684\u6765\u8bb2&#xff0c;\u9ad8\u5e76\u53d1\u5c31\u662f\u4e00\u4e2a\u670d\u52a1\u5668\u53ef\u4ee5\u540c\u65f6\u5904\u7406\u591a\u4e2a\u5ba2\u6237\u7aef\u8bf7\u6c42\u3002\u628a\u670d\u52a1\u5668\u60f3\u8c61\u6210\u670d\u52a1\u5458&#xff0c;\u5ba2\u6237\u7aef\u60f3\u8c61\u6210\u5ba2\u6237&#xff0c;\u5c31\u610f\u5473\u7740\u4e00\u4e2a\u670d\u52a1\u5458\u53ef\u4ee5\u5728\u540c\u4e00\u65f6\u95f4\u540c\u65f6\u670d\u52a1\u591a\u540d\u5ba2\u6237&#xff0c;\u800c\u4e0d\u662f\u53ea\u80fd\u670d\u52a1\u4e00\u540d\u3002 \u5728\u6211\u4e4b\u524d\u6709\u4e00\u7bc7TCP\u901a\u4fe1\u7684\u535a\u5ba2\u3002\u8fd9\u662fTCP\u7f16\u7a0b\u7684\u57fa\u7840\u7b49&#xff0c;\u8981\u60f3\u5b66\u4e60\u4f1a\u9ad8\u5e76\u53d1&#xff0c;\u5c31\u5f97\u5148\u5b66\u4f1a\u7b80\u5355\u7684\u4e00\u5bf9\u4e00\u3002 socket\u7f51\u7edc\u7f16\u7a0b\u4e4bTCP\u7f16\u7a0b<\/p>\n<h2>\u4e8c\u3001\u591a\u8fdb\u7a0b\u5b9e\u73b0\u9ad8\u5e76\u53d1<\/h2>\n<h3>1. \u6982\u5ff5\u90e8\u5206<\/h3>\n<p>\u591a\u8fdb\u7a0b\u5b9e\u73b0\u9ad8\u5e76\u53d1\u5c31\u662f\u7ed9\u6bcf\u4e00\u4e2a\u8fde\u63a5\u8fdb\u6765\u7684\u5ba2\u6237\u7aef\u90fd\u5206\u914d\u4e00\u4e2a\u8fdb\u7a0b&#xff0c;\u5f53\u6709\u5ba2\u6237\u7aef\u5b8c\u6210\u8fde\u63a5\u7684\u65f6\u5019(accept\u4e4b\u540e)&#xff0c;\u7ed9\u8fd9\u4e2a\u5ba2\u6237\u7aef\u5206\u914d\u4e00\u4e2a\u8fdb\u7a0b(fork)&#xff0c;\u5728\u8fd9\u4e2a\u5b50\u8fdb\u7a0b\u4e2d\u8d1f\u8d23\u548c\u5ba2\u6237\u7aef\u8fdb\u884c\u901a\u4fe1\u3002 \u4e3a\u4ec0\u4e48\u53ef\u4ee5\u8fd9\u6837\u505a\u5462&#xff1f; \u56e0\u4e3a\u5b50\u8fdb\u7a0b\u4f1a\u5c06\u7236\u8fdb\u7a0b\u6240\u6709\u4e1c\u897f\u590d\u5236\u4e00\u904d&#xff0c;\u5728\u5b50\u8fdb\u7a0b\u521a\u521a\u521b\u5efa\u6210\u529f\u7684\u65f6\u5019&#xff0c;\u7236\u5b50\u8fdb\u7a0b\u51e0\u4e4e\u4e00\u6837\u3002 \u7236\u8fdb\u7a0b\u4e2d\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u2013\u4e5f\u5c31\u662f\u5957\u63a5\u5b57&#xff0c;\u5f53\u7136\u4e5f\u590d\u5236\u5230\u4e86\u5b50\u8fdb\u7a0b\u4e2d&#xff0c;\u5b50\u8fdb\u7a0b\u5c31\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e2a\u5df2\u8fde\u63a5\u7684\u5957\u63a5\u5b57\u4e0e\u5ba2\u6237\u7aef\u8fdb\u884c\u901a\u4fe1\u4e86\u3002 \u8fd9\u6837\u505a\u6709\u4ec0\u4e48\u7f3a\u70b9\u5462&#xff1f; \u592a\u5360\u7528\u7cfb\u7edf\u8d44\u6e90\u4e86&#xff0c;\u6bcf\u4e00\u4e2a\u5ba2\u6237\u7aef\u90fd\u5206\u914d\u4e00\u4e2a\u8fdb\u7a0b\u53bb\u7ba1\u7406&#xff0c;\u6210\u672c\u592a\u9ad8\u4e86\u3002 \u5982\u4f55\u5b9e\u73b0&#xff1f; \u5b9e\u73b0\u6b65\u9aa4\u5c31\u662f\u5f53\u670d\u52a1\u7aefaccept\u6210\u529f&#xff0c;\u83b7\u5f97\u4e86\u5df2\u8fde\u63a5\u7684\u5957\u63a5\u5b57\u540e&#xff0c;fork()\u521b\u5efa\u5b50\u8fdb\u7a0b&#xff0c;\u7136\u540e\u5728\u5b50\u8fdb\u7a0b\u4e2d\u8fdb\u884c\u6570\u636e\u7684\u6536\u53d1\u3002<\/p>\n<h3>2. \u4ee3\u7801\u90e8\u5206<\/h3>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdlib.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;unistd.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;arpa\/inet.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;netinet\/in.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;sys\/socket.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;sys\/types.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;errno.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/\/\u76d1\u542c\u5957\u63a5\u5b57<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">listen_sockfd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> sockfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">socket<\/span><span class=\"token punctuation\">(<\/span>AF_INET<span class=\"token punctuation\">,<\/span>SOCK_STREAM<span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>sockfd <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5957\u63a5\u5b57\u521b\u5efa\u5931\u8d25&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> saddr<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>saddr<span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>saddr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    saddr<span class=\"token punctuation\">.<\/span>sin_family <span class=\"token operator\">&#061;<\/span> AF_INET<span class=\"token punctuation\">;<\/span><br \/>\n    saddr<span class=\"token punctuation\">.<\/span>sin_port <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">htons<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">8000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    saddr<span class=\"token punctuation\">.<\/span>sin_addr<span class=\"token punctuation\">.<\/span>s_addr <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">inet_addr<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;127.0.0.1&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">int<\/span> res <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>saddr<span class=\"token punctuation\">,<\/span><span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>saddr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>res <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;bind err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    res <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">listen<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">,<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>res <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;listen err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> sockfd<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> listen_fd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">listen_sockfd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/\u6d88\u9664time_wait\u72b6\u6001<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> opt <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> ret <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">setsockopt<\/span><span class=\"token punctuation\">(<\/span>listen_fd<span class=\"token punctuation\">,<\/span> SOL_SOCKET<span class=\"token punctuation\">,<\/span> SO_REUSEADDR<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>opt<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span> opt<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>ret <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;setsockopt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token comment\">\/\/\u4e3b\u7a0b\u5e8f\u5faa\u73af<\/span><br \/>\n    <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> cfd<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> caddr<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">socklen_t<\/span> clen <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>caddr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        cfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">accept<\/span><span class=\"token punctuation\">(<\/span>listen_fd<span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>caddr<span class=\"token punctuation\">,<\/span><span class=\"token operator\">&amp;<\/span>clen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>cfd <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;accept err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token comment\">\/\/\u521b\u5efa\u5b50\u8fdb\u7a0b<\/span><br \/>\n        <span class=\"token class-name\">pid_t<\/span> pid <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">fork<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>pid <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;fork err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>cfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>pid <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/\u5b50\u8fdb\u7a0b<\/span><br \/>\n            <span class=\"token keyword\">char<\/span> buff<span class=\"token punctuation\">[<\/span><span class=\"token number\">128<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">recv<\/span><span class=\"token punctuation\">(<\/span>cfd<span class=\"token punctuation\">,<\/span>buff<span class=\"token punctuation\">,<\/span><span class=\"token number\">127<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;recv:%s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span>buff<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span>cfd<span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;ok&#034;<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>cfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">else<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>cfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>listen_fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h2>\u4e09\u3001\u591a\u7ebf\u7a0b\u5b9e\u73b0\u9ad8\u5e76\u53d1<\/h2>\n<h3>1. \u6982\u5ff5\u90e8\u5206<\/h3>\n<p>\u591a\u7ebf\u7a0b\u5b9e\u73b0\u5e76\u53d1\u5c31\u662f\u6bcf\u6765\u4e00\u4e2a\u5ba2\u6237\u7aef&#xff0c;\u5c31\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b&#xff08;accept\u4e4b\u540e&#xff09;&#xff0c;\u7ed9\u8fd9\u4e2a\u5ba2\u6237\u7aef\u5206\u914d\u4e00\u4e2a\u7ebf\u7a0b&#xff0c;\u5728\u8fd9\u7ebf\u7a0b\u4e2d\u5b9e\u73b0\u4e0e\u5ba2\u6237\u7aef\u7684\u901a\u4fe1\u3002 \u4e3a\u4ec0\u4e48\u53ef\u4ee5\u8fd9\u6837\u505a\u5462&#xff1f; \u4e00\u4e2a\u8fdb\u7a0b\u4e2d\u7684\u591a\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u5171\u4eab\u8fdb\u7a0b\u4e2d\u7684\u4e00\u4e9b\u8d44\u6e90&#xff0c;\u8fd9\u4e9b\u8d44\u6e90\u521a\u597d\u5c31\u5305\u62ec\u4e86\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002\u6240\u4ee5\u53ef\u4ee5\u901a\u8fc7\u591a\u7ebf\u7a0b\u6765\u5b9e\u73b0\u5e76\u53d1\u3002 \u6709\u4ec0\u4e48\u7f3a\u70b9\u5462&#xff1f; \u867d\u7136\u8bf4\u7cfb\u7edf\u8d44\u6e90\u6d88\u8017\u6ca1\u6709\u5f00\u8f9f\u8fdb\u7a0b\u591a&#xff0c;\u4f46\u662f\u4e5f\u662f\u4e0d\u5c0f\u3002 \u5982\u4f55\u5b9e\u73b0&#xff1f; \u6211\u4eec\u9700\u8981\u5148\u4e86\u89e3\u7ebf\u7a0b\u51fd\u6570<\/p>\n<p><span class=\"token function\">pthread_create<\/span><span class=\"token punctuation\">(<\/span>\u53c2\u6570<span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span>\u53c2\u6570<span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span>\u53c2\u6570<span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span>\u53c2\u6570<span class=\"token number\">4<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n\u53c2\u6570<span class=\"token number\">1<\/span><span class=\"token operator\">:<\/span><span class=\"token class-name\">pthread_t<\/span> \u7c7b\u578b\u7684\u6307\u9488&#xff0c;\u63a5\u53d7\u521b\u5efa\u7ebf\u7a0b\u7684ID<br \/>\n\u53c2\u6570<span class=\"token number\">2<\/span><span class=\"token operator\">:<\/span>\u7ebf\u7a0b\u5c5e\u6027<span class=\"token punctuation\">,<\/span>\u8bbe\u7f6e\u4e3a<span class=\"token constant\">NULL<\/span>\u5373\u53ef<br \/>\n\u53c2\u6570<span class=\"token number\">3<\/span><span class=\"token operator\">:<\/span>\u7ebf\u7a0b\u542f\u52a8\u65f6\u5019\u7684\u51fd\u6570<span class=\"token punctuation\">,<\/span><span class=\"token keyword\">void<\/span><span class=\"token operator\">*<\/span> \u7c7b\u578b<br \/>\n\u53c2\u6570<span class=\"token number\">4<\/span><span class=\"token operator\">:<\/span>\u4f20\u5165\u51fd\u6570\u7684\u53c2\u6570<span class=\"token keyword\">void<\/span><span class=\"token operator\">*<\/span>\u7c7b\u578b<br \/>\n\u53c2\u6570<span class=\"token number\">3<\/span>\u548c\u53c2\u6570<span class=\"token number\">4<\/span>\u7684<span class=\"token keyword\">void<\/span><span class=\"token operator\">*<\/span>\u7c7b\u578b\u53ef\u4ee5\u5f3a\u8f6c\u6210\u4efb\u4f55\u7c7b\u578b&#xff0c;\u9700\u8981\u5728\u4f20\u5165\u7684\u65f6\u5019\u5f3a\u8f6c\u4e3a<span class=\"token keyword\">void<\/span><span class=\"token operator\">*<\/span>\u7c7b\u578b&#xff0c;\u4f7f\u7528\u7684\u65f6\u5019\u518d\u5f3a\u8f6c<br \/>\n\u8fd4\u56de\u503c&#xff1a;\u6210\u529f\u8fd4\u56de<span class=\"token number\">0<\/span>&#xff0c;\u5931\u8d25\u8fd4\u56de\u9519\u8bef\u7801<br \/>\n\u9700\u8981\u5bfc\u5165\u5934\u6587\u4ef6<br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;pthread.h&gt;<\/span><\/span><br \/>\n\u7f16\u8bd1\u9700\u8981\u52a0\u4e0a<span class=\"token operator\">&#8211;<\/span>lpthead<br \/>\n<span class=\"token function\">pthread_detach<\/span><span class=\"token punctuation\">(<\/span>\u53c2\u6570<span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n\u5c06\u8fd9\u4e2a\u7ebf\u7a0b\u8bbe\u7f6e\u4e3a\u5206\u79bb\u72b6\u6001&#xff0c;\u7ed3\u675f\u65f6\u4f1a\u81ea\u52a8\u91ca\u653e\u3002\u4e5f\u53ef\u4ee5\u9009\u62e9\u4f7f\u7528<span class=\"token function\">pthread_join<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n\u53c2\u6570<span class=\"token number\">1<\/span><span class=\"token operator\">:<\/span>\u7ebf\u7a0bid<span class=\"token punctuation\">,<\/span><span class=\"token class-name\">pthread_t<\/span>\u7c7b\u578b<br \/>\n<span class=\"token function\">pthread_join<\/span><span class=\"token punctuation\">(<\/span>\u53c2\u6570<span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span>\u53c2\u6570<span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n\u963b\u585e\u5f53\u524d\u7ebf\u7a0b&#xff0c;\u76f4\u5230\u6307\u5b9a\u7684\u7ebf\u7a0b\u6267\u884c\u5b8c\u6bd5<br \/>\n\u53c2\u6570<span class=\"token number\">1<\/span>&#xff1a;\u7ebf\u7a0bid<span class=\"token punctuation\">,<\/span><span class=\"token class-name\">pthread_t<\/span>\u7c7b\u578b<br \/>\n\u53c2\u6570<span class=\"token number\">2<\/span>&#xff1a;\u53ef\u4ee5\u4f20\u5165<span class=\"token constant\">NULL<\/span><\/p>\n<p>\u66f4\u52a0\u63a8\u8350\u4f7f\u7528pthread_detach();&#xff0c;\u56e0\u4e3a\u6211\u5728\u4f7f\u7528pthread_join()\u7684\u65f6\u5019&#xff0c;\u540e\u521b\u5efa\u7684\u7ebf\u7a0b\u5148\u7ed3\u675f\u7684\u60c5\u51b5\u4e0b&#xff0c;\u670d\u52a1\u7aef\u4e0d\u80fd\u6253\u5370\u51fa\u6570\u636e&#xff0c;\u56e0\u4e3a\u8fd9\u4e2a\u5148\u521b\u5efa\u7684\u7ebf\u7a0b\u6ca1\u6709\u7ed3\u675f&#xff0c;\u56e0\u4e3apthread_join\u4f1a\u963b\u585e\u4f4f\u3002<\/p>\n<h3>2.\u4ee3\u7801\u90e8\u5206<\/h3>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdlib.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;unistd.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;sys\/socket.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;sys\/types.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;arpa\/inet.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;netinet\/in.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;pthread.h&gt;<\/span><\/span><br \/>\n<span class=\"token comment\">\/\/\u521b\u5efa\u76d1\u542c\u5957\u63a5\u5b57<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">listen_sockfd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> sockfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">socket<\/span><span class=\"token punctuation\">(<\/span>AF_INET<span class=\"token punctuation\">,<\/span>SOCK_STREAM<span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> saddr<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>saddr<span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>saddr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    saddr<span class=\"token punctuation\">.<\/span>sin_family <span class=\"token operator\">&#061;<\/span> AF_INET<span class=\"token punctuation\">;<\/span><br \/>\n    saddr<span class=\"token punctuation\">.<\/span>sin_port <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">htons<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">8000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    saddr<span class=\"token punctuation\">.<\/span>sin_addr<span class=\"token punctuation\">.<\/span>s_addr <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">inet_addr<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;127.0.0.1&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> res <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>saddr<span class=\"token punctuation\">,<\/span><span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>saddr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>res <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;bind err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    res <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">listen<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">,<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>res <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;listen err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> sockfd<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u7ebf\u7a0b\u51fd\u6570<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token operator\">*<\/span> <span class=\"token function\">create_client<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token operator\">*<\/span> arg<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> cfd <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span>arg<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> buff<span class=\"token punctuation\">[<\/span><span class=\"token number\">128<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">recv<\/span><span class=\"token punctuation\">(<\/span>cfd<span class=\"token punctuation\">,<\/span>buff<span class=\"token punctuation\">,<\/span><span class=\"token number\">127<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;recv:%s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span>buff<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span>cfd<span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;ok&#034;<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>cfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> lfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">listen_sockfd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> cfd<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> caddr<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">socklen_t<\/span> clen <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>caddr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        cfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">accept<\/span><span class=\"token punctuation\">(<\/span>lfd<span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>caddr<span class=\"token punctuation\">,<\/span><span class=\"token operator\">&amp;<\/span>clen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>cfd <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;accept err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token class-name\">pthread_t<\/span> pid<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> res <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">pthread_create<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>pid<span class=\"token punctuation\">,<\/span><span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">,<\/span>create_client<span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>cfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>res <span class=\"token operator\">!&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;pthread create err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>cfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token function\">pthread_detach<\/span><span class=\"token punctuation\">(<\/span>pid<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>lfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h2>\u56db\u3001select\u5b9e\u73b0\u9ad8\u5e76\u53d1<\/h2>\n<h3>1. \u6982\u5ff5\u90e8\u5206<\/h3>\n<p>select\u9ed8\u8ba4\u6700\u591a\u76d1\u542c1024\u4e2a\u63cf\u8ff0\u7b26&#xff0c;\u53730-1023 \u5982\u4f55\u5b9e\u73b0\u53ef\u4ee5\u603b\u7ed3\u4e3a\u4e24\u6b21\u904d\u5386\u4e24\u6b21\u62f7\u8d1d\u3002 \u5c06\u5df2\u7ecf\u8fde\u63a5\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u653e\u5728\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u96c6\u5408\u4e2d&#xff0c;\u62f7\u8d1d\u5230\u5185\u6838\u4e2d&#xff0c;\u5185\u6838\u904d\u5386\u67e5\u8be2\u662f\u5426\u6709\u5173\u6ce8\u7684\u4e8b\u4ef6\u53d1\u751f&#xff0c;\u5f53\u6709\u4e8b\u4ef6\u53d1\u751f&#xff0c;\u6807\u8bb0\u4e0b\u6765&#xff0c;\u7136\u540e\u62f7\u8d1d\u56de\u7528\u6237\u6001\u5185\u6838\u4e2d&#xff0c;\u7528\u6237\u6001\u5185\u6838\u518d\u904d\u5386\u627e\u51fa\u88ab\u6807\u8bb0\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff0c;\u7136\u540e\u5bf9\u5176\u64cd\u4f5c\u3002<\/p>\n<p>\u9700\u8981\u7528\u5230\u7684\u51fd\u6570<\/p>\n<p><span class=\"token number\">1.<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">select<\/span><span class=\"token punctuation\">(<\/span>\u53c2\u6570<span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span>\u53c2\u6570<span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span>\u53c2\u6570<span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span>\u53c2\u6570<span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span>\u53c2\u6570<span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n\u53c2\u6570<span class=\"token number\">1<\/span>&#xff1a;\u63cf\u8ff0\u7b26\u6700\u5927<span class=\"token operator\">&#043;<\/span><span class=\"token number\">1<\/span>&#xff0c;\u610f\u601d\u53ea\u9700\u8981\u5173\u6ce8\u8fd9\u4e2a\u63cf\u8ff0\u7b26\u4e4b\u524d\u7684\u63cf\u8ff0\u7b26<br \/>\n\u53c2\u6570<span class=\"token number\">2<\/span>&#xff1a;fd_set<span class=\"token operator\">*<\/span>\u7ed3\u6784\u4f53\u6307\u9488&#xff0c;\u8bfb\u4e8b\u4ef6<br \/>\n\u53c2\u6570<span class=\"token number\">3<\/span>&#xff1a;fd_set<span class=\"token operator\">*<\/span>\u7ed3\u6784\u4f53\u6307\u9488&#xff0c;\u5199\u4e8b\u4ef6<br \/>\n\u53c2\u6570<span class=\"token number\">4<\/span>&#xff1a;fd_set<span class=\"token operator\">*<\/span>\u7ed3\u6784\u4f53\u6307\u9488&#xff0c;\u9519\u8bef\u4e8b\u4ef6<br \/>\n\u53c2\u6570<span class=\"token number\">5<\/span>&#xff1a;\u8d85\u65f6\u65f6\u95f4timeval<span class=\"token operator\">*<\/span>\u7c7b\u578b\u7ed3\u6784\u4f53\u6307\u9488<br \/>\n<span class=\"token number\">2.<\/span> \u8d85\u65f6\u65f6\u95f4\u7ed3\u6784\u4f53timeval<br \/>\n\u7ed3\u6784\u4f53\u5185\u4e24\u4e2a\u53d8\u91cf<br \/>\ntimeval<span class=\"token punctuation\">.<\/span>tv_sec <span class=\"token operator\">&#8212;<\/span> \u79d2<br \/>\ntimeval<span class=\"token punctuation\">.<\/span>tv_usec <span class=\"token operator\">&#8212;<\/span> \u5fae\u79d2<br \/>\n<span class=\"token number\">3.<\/span> fd_set\u5b8f<br \/>\n\u5bf9fd_set\u7ed3\u6784\u4f53\u8fdb\u884c\u64cd\u4f5c<br \/>\n<span class=\"token function\">FD_ZERO<\/span><span class=\"token punctuation\">(<\/span>fd_set<span class=\"token operator\">*<\/span> fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u6e05\u7a7a\u6240\u6709\u4f4d<\/span><br \/>\n<span class=\"token function\">FD_SET<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">,<\/span>fd_set<span class=\"token operator\">*<\/span> fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u8bbe\u7f6e<\/span><br \/>\n<span class=\"token function\">FD_ISSET<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">,<\/span>fd_set<span class=\"token operator\">*<\/span> fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u662f\u5426\u88ab\u8bbe\u7f6e<\/span><br \/>\n<span class=\"token function\">FD_CLR<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">,<\/span>fd_set<span class=\"token operator\">*<\/span> fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u6e05\u9664\u4f4d<\/span><\/p>\n<h3>2. \u4ee3\u7801\u90e8\u5206<\/h3>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;stdlib.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;unistd.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;string.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;sys\/socket.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;sys\/types.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;sys\/select.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;netinet\/in.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;arpa\/inet.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span> <span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;errno.h&gt;<\/span><\/span><br \/>\n<span class=\"token comment\">\/\/\u521b\u5efa\u76d1\u542c\u5957\u63a5\u5b57<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">create_listen_socket<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> sockfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">socket<\/span><span class=\"token punctuation\">(<\/span>AF_INET<span class=\"token punctuation\">,<\/span>SOCK_STREAM<span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>sockfd <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;socket err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> saddr<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>saddr<span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>saddr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    saddr<span class=\"token punctuation\">.<\/span>sin_family <span class=\"token operator\">&#061;<\/span> AF_INET<span class=\"token punctuation\">;<\/span><br \/>\n    saddr<span class=\"token punctuation\">.<\/span>sin_port <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">htons<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">8000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    saddr<span class=\"token punctuation\">.<\/span>sin_addr<span class=\"token punctuation\">.<\/span>s_addr <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">inet_addr<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;127.0.0.1&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">int<\/span> res <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>saddr<span class=\"token punctuation\">,<\/span><span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>saddr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>res <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;bind err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    res <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">listen<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">,<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>res <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;listen err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> sockfd<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> lfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">create_listen_socket<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> opt <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> ret <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">setsockopt<\/span><span class=\"token punctuation\">(<\/span>lfd<span class=\"token punctuation\">,<\/span> SOL_SOCKET<span class=\"token punctuation\">,<\/span> SO_REUSEADDR<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>opt<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span> opt<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>ret <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;setsockopt err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token comment\">\/\/1.\u8bbe\u7f6e\u7ed3\u6784\u4f53<\/span><br \/>\n    fd_set m_set<span class=\"token punctuation\">,<\/span>r_set<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/\u4e3a\u4ec0\u4e48\u8bbe\u7f6e\u4e24\u4e2a\u7ed3\u6784\u4f53&#xff0c;\u56e0\u4e3a\u5728select\u51fd\u6570\u4e2d\u4f1a\u4fee\u6539\u4f20\u5165\u7684fd_set<\/span><br \/>\n    <span class=\"token function\">FD_ZERO<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>m_set<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">FD_SET<\/span><span class=\"token punctuation\">(<\/span>lfd<span class=\"token punctuation\">,<\/span><span class=\"token operator\">&amp;<\/span>m_set<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> maxfd <span class=\"token operator\">&#061;<\/span> lfd<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        r_set <span class=\"token operator\">&#061;<\/span> m_set<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> res <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">select<\/span><span class=\"token punctuation\">(<\/span>maxfd<span class=\"token operator\">&#043;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token operator\">&amp;<\/span>r_set<span class=\"token punctuation\">,<\/span><span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">,<\/span><span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">,<\/span><span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>res <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;select err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>i<span class=\"token operator\">&lt;<\/span>maxfd<span class=\"token operator\">&#043;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span>i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">FD_ISSET<\/span><span class=\"token punctuation\">(<\/span>i<span class=\"token punctuation\">,<\/span><span class=\"token operator\">&amp;<\/span>r_set<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token comment\">\/\/\u5982\u679c\u88ab\u8bbe\u7f6e\u4e86\u5c31\u8fdb\u6765<\/span><br \/>\n                <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">&#061;&#061;<\/span> lfd<span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token comment\">\/\/\u8bf4\u660e\u6709\u5ba2\u6237\u7aef\u8981\u8fde\u63a5<\/span><br \/>\n                    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> caddr<span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token class-name\">socklen_t<\/span> clen <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>caddr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token keyword\">int<\/span> cfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">accept<\/span><span class=\"token punctuation\">(<\/span>lfd<span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>caddr<span class=\"token punctuation\">,<\/span><span class=\"token operator\">&amp;<\/span>clen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>cfd <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                    <span class=\"token punctuation\">{<\/span><br \/>\n                        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;accept err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                        <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>cfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                        <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token punctuation\">}<\/span><br \/>\n                    <span class=\"token function\">FD_SET<\/span><span class=\"token punctuation\">(<\/span>cfd<span class=\"token punctuation\">,<\/span><span class=\"token operator\">&amp;<\/span>m_set<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u6dfb\u52a0\u8fdb\u7ed3\u6784\u4f53\u4e2d<\/span><br \/>\n                    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>cfd<span class=\"token operator\">&gt;<\/span>maxfd<span class=\"token punctuation\">)<\/span><br \/>\n                    <span class=\"token punctuation\">{<\/span><br \/>\n                        <span class=\"token comment\">\/\/\u4e3a\u4ec0\u4e48\u8981\u5224\u65adcfd\u548cmaxfd\u5927\u5c0f\u5462&#xff0c;\u56e0\u4e3a\u6709\u53ef\u80fd\u524d\u9762\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u5ba2\u6237\u7aef\u5173\u95ed\u4e86&#xff0c;\u65b0\u52a0\u5165\u7684\u5ba2\u6237\u7aef\u6587\u4ef6\u63cf\u8ff0\u7b26\u6bd4maxfd\u8981\u5c0f&#xff0c;\u8fd9\u65f6\u5019\u5982\u679c\u66f4\u6539maxfd\u90a3\u4e48\u5c31\u4f1a\u51fa\u73b0\u6709\u4e9b\u540e\u9762\u7684\u63cf\u8ff0\u7b26\u65e0\u6cd5\u88ab\u9009\u4e2d\u4e86<\/span><br \/>\n                        maxfd <span class=\"token operator\">&#061;<\/span> cfd<span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token punctuation\">}<\/span><br \/>\n                    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6709\u65b0\u7684\u5ba2\u6237\u7aef\u8fde\u63a5\u8fdb\u6765\u4e86:%d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span>cfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token keyword\">else<\/span><br \/>\n                <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token comment\">\/\/\u8bf4\u660e\u6709\u6570\u636e\u6765\u4e86<\/span><br \/>\n                    <span class=\"token keyword\">char<\/span> buff<span class=\"token punctuation\">[<\/span><span class=\"token number\">128<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token keyword\">int<\/span> n <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">recv<\/span><span class=\"token punctuation\">(<\/span>i<span class=\"token punctuation\">,<\/span>buff<span class=\"token punctuation\">,<\/span><span class=\"token number\">127<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>n<span class=\"token operator\">&lt;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                    <span class=\"token punctuation\">{<\/span><br \/>\n                        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;recv err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                        <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>i<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                        <span class=\"token function\">FD_CLR<\/span><span class=\"token punctuation\">(<\/span>i<span class=\"token punctuation\">,<\/span><span class=\"token operator\">&amp;<\/span>m_set<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                        <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token punctuation\">}<\/span><br \/>\n                    <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>n <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                    <span class=\"token punctuation\">{<\/span><br \/>\n                        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5ba2\u6237\u7aef%d\u65ad\u5f00\u8fde\u63a5\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span>i<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                        <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>i<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                        <span class=\"token function\">FD_CLR<\/span><span class=\"token punctuation\">(<\/span>i<span class=\"token punctuation\">,<\/span><span class=\"token operator\">&amp;<\/span>m_set<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                        <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token punctuation\">}<\/span><br \/>\n                    <span class=\"token keyword\">else<\/span><br \/>\n                    <span class=\"token punctuation\">{<\/span><br \/>\n                        <span class=\"token comment\">\/\/\u6b63\u5e38\u901a\u4fe1<\/span><br \/>\n                        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;recv :%s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span>buff<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                        <span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span>i<span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;ok&#034;<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>lfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h2>\u4e94\u3001epoll\u5b9e\u73b0\u9ad8\u5e76\u53d1<\/h2>\n<h3>1. \u6982\u5ff5\u90e8\u5206<\/h3>\n<p>epoll\u662flinux\/unix\u5185\u6838\u7279\u6709\u7684\u51fd\u6570&#xff0c;\u5904\u7406\u5927\u6570\u91cf\u7684\u5e76\u53d1\u662f\u4ed6\u7684\u4f18\u52bf\u3002 \u91c7\u7528\u56de\u8c03\u673a\u5236&#xff0c;\u4ec5\u4ec5\u8fd4\u56de\u6709\u4e8b\u4ef6\u53d1\u751f\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff0c;\u4e0d\u9700\u8981\u904d\u5386\u6240\u6709\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff0c;\u6ca1\u6709\u6587\u4ef6\u63cf\u8ff0\u7b26\u6570\u91cf\u9650\u5236\u3002 \u6240\u4ee5\u8bf4\u91c7\u7528epoll\u662f\u5927\u89c4\u6a21\u9ad8\u5e76\u53d1\u7684\u6700\u4f18\u89e3\u3002 \u5982\u4f55\u5b9e\u73b0&#xff1f; \u521b\u5efaepoll\u5b9e\u4f8b(\u6811\u6839)&#xff0c;\u7136\u540e\u5c06\u5f85\u68c0\u6d4b\u7684\u63cf\u8ff0\u7b26\u6dfb\u52a0\u5230\u5185\u6838\u7684\u7ea2\u9ed1\u6811\u4e2d&#xff0c;\u4f7f\u7528\u7ea2\u9ed1\u6811\u8ddf\u8e2a\u6240\u6709\u5e26\u68c0\u6d4b\u7684\u63cf\u8ff0\u7b26\u3002\u5f53\u6709\u4e8b\u4ef6\u53d1\u751f\u7684\u65f6\u5019&#xff0c;\u901a\u8fc7\u56de\u8c03\u51fd\u6570\u5c06\u5176\u6dfb\u52a0\u5230\u5185\u6838\u7ef4\u62a4\u7684\u4e00\u4e2a\u7528\u6765\u8bb0\u5f55\u5c31\u7eea\u4e8b\u4ef6\u7684\u94fe\u8868\u4e2d\u3002 \u9700\u8981\u7528\u5230\u7684\u51fd\u6570<\/p>\n<p><span class=\"token number\">1.<\/span>\u521b\u5efaepoll\u5b9e\u4f8b<br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">epoll_create<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> size<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n\u53c2\u6570&#xff1a;\u6700\u5927\u7ed3\u70b9\u6570&#xff0c;\u76ee\u524d\u5df2\u7ecf\u5f03\u7528&#xff0c;\u53ea\u9700\u8981\u4f20\u9012\u4e00\u4e2a\u5927\u4e8e<span class=\"token number\">0<\/span>\u7684\u6570\u5373\u53ef<br \/>\n<span class=\"token number\">2.<\/span>\u5bf9epoll\u4e8b\u4ef6\u7ed3\u70b9\u7684\u6dfb\u52a0&#xff0c;\u5220\u9664&#xff0c;\u4fee\u6539&#xff0c;\u5728\u5185\u6838\u7684\u7ea2\u9ed1\u6811\u4e2d<br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">epoll_ctl<\/span><span class=\"token punctuation\">(<\/span>\u53c2\u6570<span class=\"token number\">1<\/span>&#xff0c;\u53c2\u6570<span class=\"token number\">2<\/span>&#xff0c;\u53c2\u6570<span class=\"token number\">3<\/span>&#xff0c;\u53c2\u6570<span class=\"token number\">4<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n\u53c2\u6570<span class=\"token number\">1<\/span><span class=\"token operator\">:<\/span>epoll\u6811\u6839<br \/>\n\u53c2\u6570<span class=\"token number\">2<\/span><span class=\"token operator\">:<\/span>\u64cd\u4f5c\u7c7b\u578b <span class=\"token operator\">&#8212;<\/span> <span class=\"token function\">EPOLL_CTL_ADD<\/span><span class=\"token punctuation\">(<\/span>\u589e\u52a0<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token function\">EPOLL_CTL_DEL<\/span><span class=\"token punctuation\">(<\/span>\u5220\u9664<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token function\">EPOLL_CTL_MOD<\/span><span class=\"token punctuation\">(<\/span>\u4fee\u6539<span class=\"token punctuation\">)<\/span><br \/>\n\u53c2\u6570<span class=\"token number\">3<\/span>&#xff1a;\u8981\u64cd\u4f5c\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26<br \/>\n\u53c2\u6570<span class=\"token number\">4<\/span>&#xff1a;\u6307\u5b9a\u4e8b\u4ef6<span class=\"token punctuation\">,<\/span>epoll_event<span class=\"token operator\">*<\/span>\u7c7b\u578b\u7ed3\u6784\u4f53\u6307\u9488<br \/>\nepoll_event\u7ed3\u6784\u4f53\u4e24\u4e2a\u53c2\u6570events\u548cdata<br \/>\nevent<span class=\"token punctuation\">.<\/span>events <span class=\"token operator\">&#061;<\/span> EPOLLIN<span class=\"token punctuation\">;<\/span>EPOLLOUT<span class=\"token punctuation\">;<\/span>EPOLLERR<span class=\"token punctuation\">;<\/span>\u8bfb\u4e8b\u4ef6&#xff0c;\u5199\u4e8b\u4ef6&#xff0c;\u9519\u8bef\u4e8b\u4ef6<br \/>\nevent<span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> \u6587\u4ef6\u63cf\u8ff0\u7b26<br \/>\n<span class=\"token number\">3.<\/span>\u7b49\u5f85\u548c\u83b7\u53d6epoll\u5b9e\u4f8b\u4e2d\u5df2\u7ecf\u53d1\u751f\u7684\u4e8b\u4ef6&#xff0c;\u653e\u5165\u5185\u6838\u7ef4\u62a4\u7684\u94fe\u8868\u4e2d<br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">epoll_wait<\/span><span class=\"token punctuation\">(<\/span>\u53c2\u6570<span class=\"token number\">1<\/span>&#xff0c;\u53c2\u6570<span class=\"token number\">2<\/span>&#xff0c;\u53c2\u6570<span class=\"token number\">3<\/span>&#xff0c;\u53c2\u6570<span class=\"token number\">4<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n\u53c2\u6570<span class=\"token number\">1<\/span>&#xff1a;epoll\u63cf\u8ff0\u7b26<br \/>\n\u53c2\u6570<span class=\"token number\">2<\/span>&#xff1a;\u6307\u5411epoll_event\u6570\u7ec4\u7684\u6307\u9488&#xff0c;\u8fd9\u91cc\u9762\u5b58\u653e\u7684\u662f\u5df2\u7ecf\u53d1\u751f\u7684\u6240\u6709\u4e8b\u4ef6<br \/>\n\u53c2\u6570<span class=\"token number\">3<\/span>&#xff1a;events\u6570\u7ec4\u5927\u5c0f<br \/>\n\u53c2\u6570<span class=\"token number\">4<\/span>&#xff1a;timeout&#xff0c;<span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span>\u4ee3\u8868\u65e0\u671f\u9650&#xff0c;<span class=\"token number\">0<\/span>\u4ee3\u8868\u7acb\u5373&#xff0c;\u6574\u6570\u4ee3\u8868\u591a\u5c11\u6beb\u79d2<br \/>\n\u8fd4\u56de\u503c\u662f\u6709\u4e8b\u4ef6\u53d1\u751f\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e2a\u6570<\/p>\n<h3>2. \u4ee3\u7801\u90e8\u5206<\/h3>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdlib.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;unistd.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;errno.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;sys\/socket.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;sys\/types.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;sys\/epoll.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;arpa\/inet.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;netinet\/in.h&gt;<\/span><\/span><br \/>\n<span class=\"token comment\">\/\/\u76d1\u542c\u5957\u63a5\u5b57<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">create_listen_socket<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> sockfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">socket<\/span><span class=\"token punctuation\">(<\/span>AF_INET<span class=\"token punctuation\">,<\/span>SOCK_STREAM<span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>sockfd <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;socket err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> saddr<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>saddr<span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>saddr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    saddr<span class=\"token punctuation\">.<\/span>sin_family <span class=\"token operator\">&#061;<\/span> AF_INET<span class=\"token punctuation\">;<\/span><br \/>\n    saddr<span class=\"token punctuation\">.<\/span>sin_port <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">htons<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">8000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    saddr<span class=\"token punctuation\">.<\/span>sin_addr<span class=\"token punctuation\">.<\/span>s_addr <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">inet_addr<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;127.0.0.1&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">int<\/span> res <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>saddr<span class=\"token punctuation\">,<\/span><span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>saddr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>res <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;bind err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    res <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">listen<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">,<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>res <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;listen err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> sockfd<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> lfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">create_listen_socket<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> opt <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> ret <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">setsockopt<\/span><span class=\"token punctuation\">(<\/span>lfd<span class=\"token punctuation\">,<\/span> SOL_SOCKET<span class=\"token punctuation\">,<\/span> SO_REUSEADDR<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>opt<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span> opt<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>ret <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;setsockopt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> efd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">epoll_create<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1024<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>efd <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;epoll_create err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>lfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">epoll_event<\/span> event<span class=\"token punctuation\">,<\/span>events<span class=\"token punctuation\">[<\/span><span class=\"token number\">1024<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    event<span class=\"token punctuation\">.<\/span>events <span class=\"token operator\">&#061;<\/span> EPOLLIN<span class=\"token punctuation\">;<\/span><br \/>\n    event<span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> lfd<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> nfds<span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u5b58\u50a8epoll_wait\u8fd4\u56de\u503c&#xff0c;\u6709\u591a\u5c11\u51c6\u5907\u5c31\u7eea\u7684\u4e8b\u4ef6<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> res <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">epoll_ctl<\/span><span class=\"token punctuation\">(<\/span>efd<span class=\"token punctuation\">,<\/span>EPOLL_CTL_ADD<span class=\"token punctuation\">,<\/span>lfd<span class=\"token punctuation\">,<\/span><span class=\"token operator\">&amp;<\/span>event<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>res <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;epoll_ctl err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>efd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>lfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        nfds <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">epoll_wait<\/span><span class=\"token punctuation\">(<\/span>efd<span class=\"token punctuation\">,<\/span>events<span class=\"token punctuation\">,<\/span><span class=\"token number\">1024<\/span><span class=\"token punctuation\">,<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>nfds <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;epoll_wait err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>lfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>efd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>i<span class=\"token operator\">&lt;<\/span>nfds<span class=\"token punctuation\">;<\/span>i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>events<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;&#061;<\/span> lfd<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token comment\">\/\/\u6709\u65b0\u7684\u8fde\u63a5<\/span><br \/>\n                <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> caddr<span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token class-name\">socklen_t<\/span> clen <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>caddr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">int<\/span> cfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">accept<\/span><span class=\"token punctuation\">(<\/span>lfd<span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>caddr<span class=\"token punctuation\">,<\/span><span class=\"token operator\">&amp;<\/span>clen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>cfd <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;accept err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n                event<span class=\"token punctuation\">.<\/span>events <span class=\"token operator\">&#061;<\/span> EPOLLIN<span class=\"token punctuation\">;<\/span><br \/>\n                event<span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> cfd<span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">int<\/span> res <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">epoll_ctl<\/span><span class=\"token punctuation\">(<\/span>efd<span class=\"token punctuation\">,<\/span>EPOLL_CTL_ADD<span class=\"token punctuation\">,<\/span>cfd<span class=\"token punctuation\">,<\/span><span class=\"token operator\">&amp;<\/span>event<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>res <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;epoll_ctl err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>cfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token keyword\">else<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token comment\">\/\/\u6709\u6570\u636e\u6765\u4e86<\/span><br \/>\n                <span class=\"token keyword\">char<\/span> buff<span class=\"token punctuation\">[<\/span><span class=\"token number\">1024<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">int<\/span> res <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">recv<\/span><span class=\"token punctuation\">(<\/span>events<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span>fd<span class=\"token punctuation\">,<\/span>buff<span class=\"token punctuation\">,<\/span><span class=\"token number\">1023<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>res <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;recv err&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>events<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span>fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>res <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u65ad\u5f00\u8fde\u63a5\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>events<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span>fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token keyword\">else<\/span><br \/>\n                <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;recv:%s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span>buff<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span>events<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span>fd<span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;ok&#034;<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>lfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>efd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb991\u6b21\uff0c\u70b9\u8d5e16\u6b21\uff0c\u6536\u85cf26\u6b21\u3002\u672c\u6587\u4e3b\u8981\u8bb2\u89e3\u591a\u7ebf\u7a0b\uff0c\u591a\u8fdb\u7a0b\uff0cselect\u548cepoll\u5b9e\u73b0\u9ad8\u5e76\u53d1\u7684\u539f\u7406\u548c\u4ee3\u7801\u3002\u6211\u67e5\u8be2\u4e86\u8bb8\u591a\u6587\u7ae0\uff0c\u53d1\u73b0\u5927\u5bb6\u4e0d\u662f\u53ea\u8bb2\u6982\u5ff5\u5c31\u662f\u53ea\u8bb2\u4ee3\u7801\uff0c\u6ca1\u6709\u8054\u7cfb\u5728\u4e00\u8d77\uff0c\u5e0c\u671b\u8fd9\u7bc7\u6982\u5ff5+\u4ee3\u7801\u80fd\u5e26\u7ed9\u4f60\u6536\u83b7_tcp \u9ad8\u5e76\u53d1<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[174,58,205,100,43],"topic":[],"class_list":["post-30127","post","type-post","status-publish","format-standard","hentry","category-server","tag-c","tag-linux","tag-tcp-ip","tag-100","tag-43"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>TCP\u670d\u52a1\u5668\u5b9e\u73b0\u9ad8\u5e76\u53d1\u65b9\u6cd5\uff1a\u591a\u7ebf\u7a0b\u8fdb\u7a0b\uff0cselect,poll,epoll\uff0cIO\u591a\u8def\u590d\u7528\uff0c\u6700\u8be6\u7ec6\u7684\u6982\u5ff5+\u4ee3\u7801\u96c6\u5408 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/30127.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"TCP\u670d\u52a1\u5668\u5b9e\u73b0\u9ad8\u5e76\u53d1\u65b9\u6cd5\uff1a\u591a\u7ebf\u7a0b\u8fdb\u7a0b\uff0cselect,poll,epoll\uff0cIO\u591a\u8def\u590d\u7528\uff0c\u6700\u8be6\u7ec6\u7684\u6982\u5ff5+\u4ee3\u7801\u96c6\u5408 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb991\u6b21\uff0c\u70b9\u8d5e16\u6b21\uff0c\u6536\u85cf26\u6b21\u3002\u672c\u6587\u4e3b\u8981\u8bb2\u89e3\u591a\u7ebf\u7a0b\uff0c\u591a\u8fdb\u7a0b\uff0cselect\u548cepoll\u5b9e\u73b0\u9ad8\u5e76\u53d1\u7684\u539f\u7406\u548c\u4ee3\u7801\u3002\u6211\u67e5\u8be2\u4e86\u8bb8\u591a\u6587\u7ae0\uff0c\u53d1\u73b0\u5927\u5bb6\u4e0d\u662f\u53ea\u8bb2\u6982\u5ff5\u5c31\u662f\u53ea\u8bb2\u4ee3\u7801\uff0c\u6ca1\u6709\u8054\u7cfb\u5728\u4e00\u8d77\uff0c\u5e0c\u671b\u8fd9\u7bc7\u6982\u5ff5+\u4ee3\u7801\u80fd\u5e26\u7ed9\u4f60\u6536\u83b7_tcp \u9ad8\u5e76\u53d1\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/30127.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2025-04-20T08:46:00+00:00\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"8 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/30127.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/30127.html\",\"name\":\"TCP\u670d\u52a1\u5668\u5b9e\u73b0\u9ad8\u5e76\u53d1\u65b9\u6cd5\uff1a\u591a\u7ebf\u7a0b\u8fdb\u7a0b\uff0cselect,poll,epoll\uff0cIO\u591a\u8def\u590d\u7528\uff0c\u6700\u8be6\u7ec6\u7684\u6982\u5ff5+\u4ee3\u7801\u96c6\u5408 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2025-04-20T08:46:00+00:00\",\"dateModified\":\"2025-04-20T08:46:00+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/30127.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/30127.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/30127.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"TCP\u670d\u52a1\u5668\u5b9e\u73b0\u9ad8\u5e76\u53d1\u65b9\u6cd5\uff1a\u591a\u7ebf\u7a0b\u8fdb\u7a0b\uff0cselect,poll,epoll\uff0cIO\u591a\u8def\u590d\u7528\uff0c\u6700\u8be6\u7ec6\u7684\u6982\u5ff5+\u4ee3\u7801\u96c6\u5408\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"TCP\u670d\u52a1\u5668\u5b9e\u73b0\u9ad8\u5e76\u53d1\u65b9\u6cd5\uff1a\u591a\u7ebf\u7a0b\u8fdb\u7a0b\uff0cselect,poll,epoll\uff0cIO\u591a\u8def\u590d\u7528\uff0c\u6700\u8be6\u7ec6\u7684\u6982\u5ff5+\u4ee3\u7801\u96c6\u5408 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/30127.html","og_locale":"zh_CN","og_type":"article","og_title":"TCP\u670d\u52a1\u5668\u5b9e\u73b0\u9ad8\u5e76\u53d1\u65b9\u6cd5\uff1a\u591a\u7ebf\u7a0b\u8fdb\u7a0b\uff0cselect,poll,epoll\uff0cIO\u591a\u8def\u590d\u7528\uff0c\u6700\u8be6\u7ec6\u7684\u6982\u5ff5+\u4ee3\u7801\u96c6\u5408 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb991\u6b21\uff0c\u70b9\u8d5e16\u6b21\uff0c\u6536\u85cf26\u6b21\u3002\u672c\u6587\u4e3b\u8981\u8bb2\u89e3\u591a\u7ebf\u7a0b\uff0c\u591a\u8fdb\u7a0b\uff0cselect\u548cepoll\u5b9e\u73b0\u9ad8\u5e76\u53d1\u7684\u539f\u7406\u548c\u4ee3\u7801\u3002\u6211\u67e5\u8be2\u4e86\u8bb8\u591a\u6587\u7ae0\uff0c\u53d1\u73b0\u5927\u5bb6\u4e0d\u662f\u53ea\u8bb2\u6982\u5ff5\u5c31\u662f\u53ea\u8bb2\u4ee3\u7801\uff0c\u6ca1\u6709\u8054\u7cfb\u5728\u4e00\u8d77\uff0c\u5e0c\u671b\u8fd9\u7bc7\u6982\u5ff5+\u4ee3\u7801\u80fd\u5e26\u7ed9\u4f60\u6536\u83b7_tcp \u9ad8\u5e76\u53d1","og_url":"https:\/\/www.wsisp.com\/helps\/30127.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2025-04-20T08:46:00+00:00","author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"8 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/30127.html","url":"https:\/\/www.wsisp.com\/helps\/30127.html","name":"TCP\u670d\u52a1\u5668\u5b9e\u73b0\u9ad8\u5e76\u53d1\u65b9\u6cd5\uff1a\u591a\u7ebf\u7a0b\u8fdb\u7a0b\uff0cselect,poll,epoll\uff0cIO\u591a\u8def\u590d\u7528\uff0c\u6700\u8be6\u7ec6\u7684\u6982\u5ff5+\u4ee3\u7801\u96c6\u5408 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","isPartOf":{"@id":"https:\/\/www.wsisp.com\/helps\/#website"},"datePublished":"2025-04-20T08:46:00+00:00","dateModified":"2025-04-20T08:46:00+00:00","author":{"@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41"},"breadcrumb":{"@id":"https:\/\/www.wsisp.com\/helps\/30127.html#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wsisp.com\/helps\/30127.html"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.wsisp.com\/helps\/30127.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.wsisp.com\/helps"},{"@type":"ListItem","position":2,"name":"TCP\u670d\u52a1\u5668\u5b9e\u73b0\u9ad8\u5e76\u53d1\u65b9\u6cd5\uff1a\u591a\u7ebf\u7a0b\u8fdb\u7a0b\uff0cselect,poll,epoll\uff0cIO\u591a\u8def\u590d\u7528\uff0c\u6700\u8be6\u7ec6\u7684\u6982\u5ff5+\u4ee3\u7801\u96c6\u5408"}]},{"@type":"WebSite","@id":"https:\/\/www.wsisp.com\/helps\/#website","url":"https:\/\/www.wsisp.com\/helps\/","name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","description":"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41","name":"admin","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/","url":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","contentUrl":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","caption":"admin"},"sameAs":["http:\/\/wp.wsisp.com"],"url":"https:\/\/www.wsisp.com\/helps\/author\/admin"}]}},"_links":{"self":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/30127","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/comments?post=30127"}],"version-history":[{"count":0,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/30127\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media?parent=30127"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/categories?post=30127"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/tags?post=30127"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/topic?post=30127"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}