{"id":26036,"date":"2025-04-19T14:26:46","date_gmt":"2025-04-19T06:26:46","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/26036.html"},"modified":"2025-04-19T14:26:46","modified_gmt":"2025-04-19T06:26:46","slug":"reactor%e5%ae%9e%e7%8e%b0%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%99%be%e4%b8%87%e5%b9%b6%e5%8f%91","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/26036.html","title":{"rendered":"reactor\u5b9e\u73b0\u670d\u52a1\u5668\u767e\u4e07\u5e76\u53d1"},"content":{"rendered":"<p>\u63d0\u793a&#xff1a;\u6587\u7ae0\u5199\u5b8c\u540e&#xff0c;\u76ee\u5f55\u53ef\u4ee5\u81ea\u52a8\u751f\u6210&#xff0c;\u5982\u4f55\u751f\u6210\u53ef\u53c2\u8003\u53f3\u8fb9\u7684\u5e2e\u52a9\u6587\u6863<\/p>\n<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\u524d\u8a00<\/li>\n<li>1. epoll \u548c reactor\u7684\u533a\u522b<\/li>\n<li>2. io\u3001\u4e8b\u4ef6\u548c\u56de\u8c03\u51fd\u6570\u7684\u5173\u7cfb<\/li>\n<li>3. \u7f16\u8bd1\u8fc7\u7a0b\u4e2d\u9047\u5230\u7684\u95ee\u9898<\/li>\n<li>4. \u4ee3\u7801\u601d\u8def<\/li>\n<li>5. \u5b9e\u73b0\u4ee3\u7801<\/li>\n<li>6. \u5b9e\u73b0\u6548\u679c<\/li>\n<\/ul>\n<hr \/>\n<h2>\u524d\u8a00<\/h2>\n<p>\u76f8\u5bf9\u4e8eselect&#xff0c;poll&#xff0c;epoll&#xff0c;reactor \u66f4\u52a0\u5173\u6ce8\u5177\u4f53\u7684\u4e8b\u4ef6&#xff0c;select&#xff0c;poll&#xff0c;epoll \u901a\u77e5\u5185\u6838\u54ea\u4e9b io \u6709\u4e8b\u4ef6&#xff0c;\u800c reactor \u9488\u5bf9\u4e0d\u540c\u7684\u4e8b\u4ef6\u6267\u884c\u4e0d\u540c\u7684\u56de\u8c03\u51fd\u6570&#xff0c;\u505a\u5230\u628a\u8bfb\u5199\u4e8b\u4ef6\u5206\u5f00&#xff0c;\u8bfb\u4e8b\u4ef6\u5c31\u6267\u884c\u76f8\u5e94\u7684recv \u56de\u8c03\u51fd\u6570&#xff0c;\u5199\u4e8b\u4ef6\u5c31\u6267\u884c\u76f8\u5e94\u7684 send \u56de\u8c03\u51fd\u6570&#xff0c;\u53ef\u5b9e\u73b0\u66f4\u597d\u5173\u6ce8io\u4e8b\u4ef6\u7684\u5904\u7406\u3002\u672c\u6587\u63a2\u8ba8\u57fa\u4e8e epoll \u5b9e\u73b0\u7684 reactor\u3002<\/p>\n<hr \/>\n<h2>1. epoll \u548c reactor\u7684\u533a\u522b<\/h2>\n<p>a. epoll \u4e3b\u8981\u5173\u6ce8\u7f51\u7edc io \u7684\u7ba1\u7406&#xff1b;\u800creactor\u66f4\u5173\u6ce8io\u4e8b\u4ef6\u7684\u5904\u7406\u3002 b. epoll\u6267\u884c\u65f6&#xff0c;\u6570\u636e\u4e00\u6b21\u6027\u63a5\u6536\u4e0d\u5b8c\u65f6&#xff0c;\u540e\u9762\u7684\u6570\u636e\u6ca1\u6709\u5730\u65b9\u653e&#xff0c;\u4e0d\u9002\u5408\u5927\u5305\u548c\u591a\u5305\u5904\u7406&#xff1b;\u800creactor \u628a\u8bfb\u5199\u6570\u636e\u5206\u522b\u653e\u5728 rbuffer \u548c wbuffer&#xff0c;\u901a\u8fc7 rlength \u548c wlength \u4f9d\u6b21\u5b58\u653e\u4e4b\u540e\u7684\u6570\u636e&#xff0c;\u5e76\u4e14\u53ef\u4ee5\u4f7f\u5f97io \u540c\u65f6\u8bfb\u548c\u5199\u3002<\/p>\n<h2>2. io\u3001\u4e8b\u4ef6\u548c\u56de\u8c03\u51fd\u6570\u7684\u5173\u7cfb<\/h2>\n<p>io\u4e3b\u8981\u5206\u4e3a litsenfd \u548c clientfd&#xff0c;\u800c listenfd \u5bf9\u5e94\u4e8b\u4ef6\u662f EPOLLIN&#xff0c;\u5176\u5bf9\u5e94\u7684\u56de\u8c03\u51fd\u6570\u662faccept_cb&#xff0c;clientfd\u5bf9\u5e94\u4e8b\u4ef6\u4e3b\u8981\u5206\u4e3a EPOLLIN \u548c EPOLLOUT&#xff0c;\u5206\u522b\u5bf9\u5e94\u56de\u8c03\u51fd\u6570 recv_cb \u548c send_cb\u3002 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419062643-68034223aa277.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h2>3. \u7f16\u8bd1\u8fc7\u7a0b\u4e2d\u9047\u5230\u7684\u95ee\u9898<\/h2>\n<p>(1) \u7f16\u8bd1\u65f6\u5185\u5b58\u4e0d\u591f<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419062643-68034223c870b.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u89e3\u51b3\u529e\u6cd5&#xff1a;gcc\u7f16\u8bd1\u53c2\u6570\u52a0\u4e0a -mcmodel&#061;medium\u3002<\/p>\n<p>(2) \u7f16\u8bd1\u65f6\u9047\u5230 too many open files<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419062643-68034223e9b65.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u89e3\u51b3\u529e\u6cd51&#xff1a;\u4f7f\u7528ulimit -a \u770bopen files\u6570\u91cf&#xff0c;\u901a\u8fc7ulimit -n \u6570\u5b57\u6539\u5176\u5927\u5c0f&#xff0c;\u4e0d\u662f\u6c38\u4e45\u4fee\u6539&#xff0c;\u91cd\u542f\u865a\u62df\u673a\u540e\u6d88\u5931\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419062644-6803422417d37.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419062644-680342243984b.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u89e3\u51b3\u65b9\u6cd52&#xff1a;\u901a\u8fc7sudo vim \/etc\/security\/limits.conf\u5728\u6587\u4ef6\u672b\u5c3e\u6dfb\u52a0\u4e0b\u56fe\u5185\u5bb9\u3002\u4fdd\u5b58\u540e\u91cd\u542f\u865a\u62df\u673a\u5373\u53ef\u3002\u4fee\u6539\u914d\u7f6e\u6587\u4ef6&#xff0c;\u6d89\u53ca\u5199\u78c1\u76d8&#xff0c;\u6bcf\u4e00\u6b21\u91cd\u542f\u865a\u62df\u673a\u4f1a\u91cd\u65b0\u52a0\u8f7d&#xff0c;\u6c38\u4e45\u4fee\u6539\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419062644-6803422459d85.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419062644-68034224769c9.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>(3) \u7aef\u53e3\u6570\u91cf\u4e0d\u591f<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419062644-6803422498ffd.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u89e3\u51b3\u65b9\u6cd5&#xff1a;sudo vim \/etc\/sysctl.conf\u547d\u4ee4\u52a0\u4e0a\u4ee5\u4e0b\u5185\u5bb9&#xff08;\u589e\u52a0\u4e86\u7aef\u53e3\u6570\u91cf\u4ee5\u53ca\u9650\u5236&#xff09;&#xff0c;\u4fdd\u5b58\u5b8c\u4e4b\u540e\u901a\u8fc7sudo sysctl -p\u547d\u4ee4\u8fd0\u884c\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419062644-68034224baf3e.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419062644-68034224da460.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>(4) \u5185\u6838\u6a21\u5757\u6ca1\u6709\u52a0\u8f7d&#xff08;net.nf_conntrack&#xff09;\u6ca1\u6709\u52a0\u8f7d\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419062645-68034225090bd.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u89e3\u51b3\u65b9\u6cd5&#xff1a;sudo modprobe nf_conntrack\u547d\u4ee4\u52a0\u8f7d\u6a21\u5757&#xff08;modeprobe\u667a\u80fd\u5730\u5728\u5185\u6838\u4e2d\u52a0\u8f7d\u6a21\u5757\u6216\u8005\u4e00\u5904\u6a21\u5757&#xff09;<\/p>\n<p>(5) \u4e0d\u80fd\u5206\u914d\u8bf7\u6c42\u5730\u5740&#xff0c;\u7531\u4e8e\u4e94\u5143\u7ec4\u4e0d\u591f&#xff08;\u6e90\u7aef\u53e3\u53f7\u3001\u76ee\u7684\u7aef\u53e3\u53f7\u3001\u534f\u8bae\u53f7\u3001\u6e90IP\u3001\u76ee\u7684IP&#xff09;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419062645-68034225279f9.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419062645-6803422547e68.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u89e3\u51b3\u65b9\u6cd5&#xff1a;\u589e\u52a0\u4e94\u5143&#xff0c;\u5efa\u7acb\u591a\u4e2aip&#xff08;sever&#xff09;&#xff0c;\u5efa\u7acb\u591a\u4e2a\u7aef\u53e3&#xff08;\u901a\u8fc7\u4ee5\u4e0b\u5faa\u73af&#xff09;<\/p>\n<p><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>   <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>i <span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> MAX_PORTS <span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token comment\">\/\/20\u4e2asever<\/span><\/p>\n<p>            <span class=\"token keyword\">int<\/span> sockfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">init_server<\/span><span class=\"token punctuation\">(<\/span>port <span class=\"token operator\">&#043;<\/span> i<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>       conn_list<span class=\"token punctuation\">[<\/span>sockfd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> sockfd<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/regist \u4e00\u4e2afd<\/span><br \/>\n       conn_list<span class=\"token punctuation\">[<\/span>sockfd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>r_action<span class=\"token punctuation\">.<\/span>recv_callback <span class=\"token operator\">&#061;<\/span> accept_cb<span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/regist\u4e00\u4e2a\u56de\u8c03\u51fd\u6570<\/span><\/p>\n<p>       <span class=\"token function\">set_event<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">,<\/span> EPOLLIN<span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u5173\u6ce8EPOLLIN&#xff0c;\u5173\u6ce8\u5230\u4e00\u4e2a\u4e8b\u4ef6<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><\/p>\n<p>(6) Out of memory&#xff08;\u8fdb\u7a0b\u88abkill\u6389&#xff09;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419062645-6803422565c75.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u89e3\u51b3\u529e\u6cd5&#xff1a;\u4e3a\u865a\u62df\u673a\u8bbe\u7f6e\u66f4\u5927\u7684\u5185\u5b58\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419062645-6803422583953.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h2>4. \u4ee3\u7801\u601d\u8def<\/h2>\n<p>1 \u4f7f\u7528epoll_create()\u6784\u5efa\u4e00\u4e2a\u673a\u5236&#xff0c;\u8fd4\u56de\u4e00\u4e2a\u63cf\u8ff0\u7b26 2 \u6ce8\u518c\u4e00\u4e2afd&#xff08;\u5305\u62ec\u521b\u5efa\u5957\u63a5\u5b57\u3001\u7ed1\u5b9a\u670d\u52a1\u5668ip\u548c\u7aef\u53e3\u3001listen\u76d1\u542c\u8fde\u63a5&#xff09; 3 \u8c03\u7528\u56de\u8c03\u51fd\u6570accept&#xff0c;\u5efa\u7acb\u5ba2\u670d\u7aef\u8fde\u63a5&#xff0c;\u6ce8\u518c\u5bf9\u5e94\u7684event&#xff08;\u8bfb\u5199\u5206\u5f00&#xff09; 4 \u5efa\u7acb\u76f8\u5e94\u7684event&#xff0c;\u901a\u8fc7epoll_ctl\u76d1\u542c\u4e8b\u4ef6\u7c7b\u578b&#xff08;\u6ce8\u518c\u3001\u4fee\u6539\u3001\u5220\u9664&#xff09; 5 \u901a\u8fc7mainloop\u6267\u884c\u56de\u8c03\u51fd\u6570&#xff0c;\u901a\u8fc7epoll_wait\u8fd4\u56de\u5c31\u7eeafd\u6570\u91cf&#xff0c;\u5224\u65ad\u6bcf\u4e2a\u4e8b\u4ef6\u7684\u72b6\u6001&#xff0c;\u8bfb\u72b6\u6001\u548c\u5199\u72b6\u6001\u5206\u522b\u6267\u884crecv\u548csend\u51fd\u6570\u3002<\/p>\n<h2>5. \u5b9e\u73b0\u4ee3\u7801<\/h2>\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;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;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;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;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;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;pthread.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;poll.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;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\/time.h&gt;<\/span><\/span><\/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\">&#034;server.h&#034;<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">CONNECTION_SIZE<\/span><span class=\"token expression\"><span class=\"token number\">1048576<\/span> <\/span><span class=\"token comment\">\/\/ 1024 * 1024<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">MAX_PORTS<\/span><span class=\"token expression\"><span class=\"token number\">20<\/span><\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">TIME_SUB_MS<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span>tv1<span class=\"token punctuation\">,<\/span> tv2<span class=\"token punctuation\">)<\/span>  <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span>tv1<span class=\"token punctuation\">.<\/span>tv_sec <span class=\"token operator\">&#8211;<\/span> tv2<span class=\"token punctuation\">.<\/span>tv_sec<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span> <span class=\"token number\">1000<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span>tv1<span class=\"token punctuation\">.<\/span>tv_usec <span class=\"token operator\">&#8211;<\/span> tv2<span class=\"token punctuation\">.<\/span>tv_usec<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">\/<\/span> <span class=\"token number\">1000<\/span><span class=\"token punctuation\">)<\/span><\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">accept_cb<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">recv_cb<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">send_cb<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> epfd <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">timeval<\/span> begin<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">conn<\/span> conn_list<span class=\"token punctuation\">[<\/span>CONNECTION_SIZE<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/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 comment\">\/\/ fd<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">set_event<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> event<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> flag<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>flag<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>  <span class=\"token comment\">\/\/ non-zero add<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">epoll_event<\/span> ev<span class=\"token punctuation\">;<\/span><br \/>\nev<span class=\"token punctuation\">.<\/span>events <span class=\"token operator\">&#061;<\/span> event<span class=\"token punctuation\">;<\/span><br \/>\nev<span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> fd<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">epoll_ctl<\/span><span class=\"token punctuation\">(<\/span>epfd<span class=\"token punctuation\">,<\/span> EPOLL_CTL_ADD<span class=\"token punctuation\">,<\/span> fd<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>ev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span>  <span class=\"token comment\">\/\/ zero mod<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">epoll_event<\/span> ev<span class=\"token punctuation\">;<\/span><br \/>\nev<span class=\"token punctuation\">.<\/span>events <span class=\"token operator\">&#061;<\/span> event<span class=\"token punctuation\">;<\/span><br \/>\nev<span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> fd<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">epoll_ctl<\/span><span class=\"token punctuation\">(<\/span>epfd<span class=\"token punctuation\">,<\/span> EPOLL_CTL_MOD<span class=\"token punctuation\">,<\/span> fd<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>ev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">event_register<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> event<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>fd <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>conn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> fd<span class=\"token punctuation\">;<\/span><br \/>\nconn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>r_action<span class=\"token punctuation\">.<\/span>recv_callback <span class=\"token operator\">&#061;<\/span> recv_cb<span class=\"token punctuation\">;<\/span><br \/>\nconn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>send_callback <span class=\"token operator\">&#061;<\/span> send_cb<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span>conn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>rbuffer<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> BUFFER_LENGTH<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nconn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>rlength <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span>conn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>wbuffer<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> BUFFER_LENGTH<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nconn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>wlength <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">set_event<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">,<\/span> event<span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ listenfd(sockfd) &#8211;&gt; EPOLLIN &#8211;&gt; accept_cb<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">accept_cb<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span>  clientaddr<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">socklen_t<\/span> len <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>clientaddr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> clientfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">accept<\/span><span class=\"token punctuation\">(<\/span>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>clientaddr<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>len<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/printf(&#034;accept finshed: %d\\\\n&#034;, clientfd);<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>clientfd <span class=\"token operator\">&lt;<\/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;accept errno: %d &#8211;&gt; %s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> errno<span class=\"token punctuation\">,<\/span> <span class=\"token function\">strerror<\/span><span class=\"token punctuation\">(<\/span>errno<span class=\"token punctuation\">)<\/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 function\">event_register<\/span><span class=\"token punctuation\">(<\/span>clientfd<span class=\"token punctuation\">,<\/span> EPOLLIN<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ | EPOLLET<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span>clientfd <span class=\"token operator\">%<\/span> <span class=\"token number\">1000<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">timeval<\/span> current<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">gettimeofday<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>current<span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> time_used <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">TIME_SUB_MS<\/span><span class=\"token punctuation\">(<\/span>current<span class=\"token punctuation\">,<\/span> begin<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>begin<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>current<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">timeval<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;accept finshed: %d, time_used: %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> clientfd<span class=\"token punctuation\">,<\/span> time_used<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token punctuation\">}<\/span><\/p>\n<p><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<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">recv_cb<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span>conn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>rbuffer<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> BUFFER_LENGTH <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> count <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">recv<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">,<\/span> conn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>rbuffer<span class=\"token punctuation\">,<\/span> BUFFER_LENGTH<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>count <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/\/ disconnect<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;client disconnect: %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">epoll_ctl<\/span><span class=\"token punctuation\">(<\/span>epfd<span class=\"token punctuation\">,<\/span> EPOLL_CTL_DEL<span class=\"token punctuation\">,<\/span> fd<span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ unfinished<\/span><\/p>\n<p><span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>count <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/\/ <\/span><\/p>\n<p><span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;count: %d, errno: %d, %s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> count<span class=\"token punctuation\">,<\/span> errno<span class=\"token punctuation\">,<\/span> <span class=\"token function\">strerror<\/span><span class=\"token punctuation\">(<\/span>errno<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">epoll_ctl<\/span><span class=\"token punctuation\">(<\/span>epfd<span class=\"token punctuation\">,<\/span> EPOLL_CTL_DEL<span class=\"token punctuation\">,<\/span> fd<span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><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<p>conn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>rlength <span class=\"token operator\">&#061;<\/span> count<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/printf(&#034;RECV: %s\\\\n&#034;, conn_list[fd].rbuffer);<\/span><\/p>\n<p>conn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>wlength <span class=\"token operator\">&#061;<\/span> conn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>rlength<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span>conn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>wbuffer<span class=\"token punctuation\">,<\/span> conn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>rbuffer<span class=\"token punctuation\">,<\/span> conn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>wlength<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;[%d]RECV: %s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> conn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>rlength<span class=\"token punctuation\">,<\/span> conn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>rbuffer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">set_event<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">,<\/span> EPOLLOUT<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">return<\/span> count<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\">send_cb<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> count <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>conn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>wlength <span class=\"token operator\">!&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\ncount <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">,<\/span> conn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>wbuffer<span class=\"token punctuation\">,<\/span> conn_list<span class=\"token punctuation\">[<\/span>fd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>wlength<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 function\">set_event<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">,<\/span> EPOLLIN<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/set_event(fd, EPOLLOUT, 0);<\/span><\/p>\n<p><span class=\"token keyword\">return<\/span> count<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\">init_server<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">short<\/span> port<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><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><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> servaddr<span class=\"token punctuation\">;<\/span><br \/>\nservaddr<span class=\"token punctuation\">.<\/span>sin_family <span class=\"token operator\">&#061;<\/span> AF_INET<span class=\"token punctuation\">;<\/span><br \/>\nservaddr<span class=\"token punctuation\">.<\/span>sin_addr<span class=\"token punctuation\">.<\/span>s_addr <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">htonl<\/span><span class=\"token punctuation\">(<\/span>INADDR_ANY<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 0.0.0.0<\/span><br \/>\nservaddr<span class=\"token punctuation\">.<\/span>sin_port <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">htons<\/span><span class=\"token punctuation\">(<\/span>port<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 0-1023, <\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span> <span class=\"token operator\">&#061;&#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>servaddr<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/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;bind failed: %s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">strerror<\/span><span class=\"token punctuation\">(<\/span>errno<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token function\">listen<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">,<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/printf(&#034;listen finshed: %d\\\\n&#034;, sockfd); \/\/ 3 <\/span><\/p>\n<p><span class=\"token keyword\">return<\/span> sockfd<span class=\"token punctuation\">;<\/span><\/p>\n<p><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> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">short<\/span> port <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">2000<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>epfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">epoll_create<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/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> MAX_PORTS<span class=\"token punctuation\">;<\/span>i <span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> sockfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">init_server<\/span><span class=\"token punctuation\">(<\/span>port <span class=\"token operator\">&#043;<\/span> i<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>conn_list<span class=\"token punctuation\">[<\/span>sockfd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> sockfd<span class=\"token punctuation\">;<\/span><br \/>\nconn_list<span class=\"token punctuation\">[<\/span>sockfd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>r_action<span class=\"token punctuation\">.<\/span>recv_callback <span class=\"token operator\">&#061;<\/span> accept_cb<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">set_event<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">,<\/span> EPOLLIN<span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token function\">gettimeofday<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>begin<span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/\/ mainloop<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">epoll_event<\/span> events<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 punctuation\">{<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> nready <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">epoll_wait<\/span><span class=\"token punctuation\">(<\/span>epfd<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><\/p>\n<p><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/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> nready<span class=\"token punctuation\">;<\/span>i <span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> connfd <span class=\"token operator\">&#061;<\/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><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>events <span class=\"token operator\">&amp;<\/span> EPOLLIN<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\nconn_list<span class=\"token punctuation\">[<\/span>connfd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>r_action<span class=\"token punctuation\">.<\/span><span class=\"token function\">recv_callback<\/span><span class=\"token punctuation\">(<\/span>connfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <\/p>\n<p><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>events <span class=\"token operator\">&amp;<\/span> EPOLLOUT<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\nconn_list<span class=\"token punctuation\">[<\/span>connfd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">send_callback<\/span><span class=\"token punctuation\">(<\/span>connfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token punctuation\">}<\/span><\/p>\n<h2>6. \u5b9e\u73b0\u6548\u679c<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419062645-68034225a63bf.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u53c2\u8003\u5b66\u4e60&#xff1a;https:\/\/github.com\/0voice<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb836\u6b21\uff0c\u70b9\u8d5e25\u6b21\uff0c\u6536\u85cf28\u6b21\u3002\u76f8\u5bf9\u4e8eselect\uff0cpoll\uff0cepoll\uff0creactor \u66f4\u52a0\u5173\u6ce8\u5177\u4f53\u7684\u4e8b\u4ef6\uff0cselect\uff0cpoll\uff0cepoll \u901a\u77e5\u5185\u6838\u54ea\u4e9b io 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