{"id":30037,"date":"2025-04-20T16:02:16","date_gmt":"2025-04-20T08:02:16","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/30037.html"},"modified":"2025-04-20T16:02:16","modified_gmt":"2025-04-20T08:02:16","slug":"linux%e7%bd%91%e7%bb%9c%e7%bc%96%e7%a8%8b-3-%e4%bb%80%e4%b9%88%e6%98%afreactor%ef%bc%9f%e5%a6%82%e4%bd%95%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\/30037.html","title":{"rendered":"linux\u7f51\u7edc\u7f16\u7a0b (3) 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\u4e8b\u4ef6\u5904\u7406\u5668\u4f1a\u6267\u884c\u4e0e\u4e8b\u4ef6\u76f8\u5173\u7684\u64cd\u4f5c&#xff0c;\u6bd4\u5982\u8bfb\u53d6\u6570\u636e\u3001\u5904\u7406\u8bf7\u6c42\u3001\u53d1\u9001\u54cd\u5e94\u7b49\u3002<\/p>\n<h2>\u56db\u3001\u901a\u8fc7epoll\u5b9e\u73b0\u4e00\u4e2areactor<\/h2>\n<h3>1.\u8bbe\u8ba1\u8fde\u63a5\u6c60<\/h3>\n<p>\u9996\u5148\u6211\u4eec\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u8fde\u63a5\u6c60&#xff0c;\u5b9a\u4e49\u8fde\u63a5\u6c60\u7684\u76ee\u7684\u4e3b\u8981\u662f\u628a\u6bcf\u4e2aI\/O\u8fde\u63a5\u548c\u4e00\u7ec4\u6570\u636e\u5173\u8054\u8d77\u6765&#xff0c;\u901a\u8fc7\u6587\u4ef6\u63cf\u8ff0\u7b26\u5c31\u53ef\u4ee5\u5f88\u65b9\u4fbf\u7684\u627e\u5230\u548c\u5176\u76f8\u5173\u8054\u7684\u6570\u636e&#xff0c;\u8fde\u63a5\u6c60\u5b9a\u4e49\u5982\u4e0b&#xff1a;<\/p>\n<p><span class=\"token keyword\">typedef<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">epollConnInfo<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> wBuffer<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> wLength<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> rBuffer<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> rLength<span class=\"token punctuation\">;<\/span><\/p>\n<p>    RCALLBACK send_callback<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">union<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        RCALLBACK accept_callback<span class=\"token punctuation\">;<\/span><br \/>\n        RCALLBACK recv_callback<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> r_action<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token punctuation\">}<\/span>EPOLLCONNINFO<span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8fde\u63a5\u6c60\u4e2d\u5305\u542b\u4e86\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff0c;\u6536\u6570\u636ebuffer\u3001\u6536\u6570\u636e\u957f\u5ea6\u3001\u53d1\u6570\u636ebuffer\u3001\u53d1\u6570\u636e\u957f\u5ea6&#xff0c;\u4ee5\u53ca\u4e0d\u540c\u7684\u56de\u8c03\u51fd\u6570\u3002\u5bf9\u4e8e\u4e0d\u540c\u7684fd&#xff0c;\u4e0d\u540c\u7684\u4e8b\u4ef6&#xff0c;\u4f1a\u89e6\u53d1\u4e0d\u540c\u7684\u56de\u8c03\u51fd\u6570\u3002 \u6211\u4eec\u4f7f\u7528\u6bcf\u4e2afd\u5373\u4f5c\u4e3a\u8fde\u63a5\u6c60\u7684\u4e0b\u6807&#xff0c;\u65b9\u4fbf\u8bbf\u95ee\u3002\u6211\u4eec\u628a\u8fde\u63a5\u6c60\u7684\u5927\u5c0f\u8bbe\u7f6e\u4e3a1048576&#xff0c;\u65b9\u4fbf\u6211\u4eec\u5b9e\u73b0\u670d\u52a1\u5668\u767e\u4e07\u7ea7\u5e76\u53d1&#xff1a;<\/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><br \/>\n<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><\/p>\n<h3>2\u3001\u4e8b\u4ef6\u6e90\u5173\u8054\u4e8b\u4ef6<\/h3>\n<p>\u4e8b\u4ef6\u6e90\u5373\u4e3asockfd&#xff0c;\u4e00\u4e2a\u7f51\u7edcI\/O&#xff0c;\u5206\u4e3alistenfd\u548cclientfd\u3002\u4e8b\u4ef6\u5373\u4e3a\u53ef\u8bfb\u6216\u8005\u53ef\u5199&#xff0c;\u5728epoll\u4e2d\u4e8b\u4ef6\u6e90\u5173\u8054\u4e8b\u4ef6&#xff0c;\u5373\u5c06fd\u6dfb\u52a0\u5230epoll\u7684\u7ea2\u9ed1\u6811\u4e0a&#xff0c;\u5e76\u8bbe\u7f6e\u76d1\u542c\u4e8b\u4ef6&#xff0c;\u901a\u8fc7epoll\u8fdb\u884c\u7ba1\u7406&#xff0c;\u6211\u4eec\u5b9a\u4e49\u5982\u4e0b\u51fd\u6570&#xff1a;<\/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> mode<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> ev<span class=\"token punctuation\">;<\/span><br \/>\n    ev<span class=\"token punctuation\">.<\/span>events <span class=\"token operator\">&#061;<\/span> event<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/\u53ef\u8bfb EPOLLIN  \u53ef\u5199 EPOLLOUT<\/span><br \/>\n    ev<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 keyword\">return<\/span> <span class=\"token function\">epoll_ctl<\/span><span class=\"token punctuation\">(<\/span>epFd<span class=\"token punctuation\">,<\/span>mode<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><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5176\u4e2dmode\u4e3aEPOLL_CTL_ADD\u3001EPOLL_CTL_MOD\u3001EPOLL_CTL_DEL\u3002<\/p>\n<h3>3\u3001\u5b9a\u4e49\u56de\u8c03\u51fd\u6570<\/h3>\n<p>\u9700\u8981\u5b9a\u4e49\u4e09\u4e2a\u56de\u8c03\u51fd\u6570<\/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> listenFd<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/\u5f53\u76d1\u542c\u5957\u63a5\u5b57\u4e0a\u6709\u53ef\u8bfb\u4e8b\u4ef6\u65f6\u89e6\u53d1\u6b64\u51fd\u6570&#xff0c;\u5373\u6709\u65b0\u8fde\u63a5\u8fde\u5165<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> clientSock<span class=\"token punctuation\">;<\/span><br \/>\n    socklen_t len <span class=\"token operator\">&#061;<\/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><br \/>\n    <span class=\"token keyword\">int<\/span> clientFd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">accept<\/span><span class=\"token punctuation\">(<\/span>listenFd<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>clientSock<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 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><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;error! accept_cb error !listenfd: %d&#034;<\/span><span class=\"token punctuation\">,<\/span>listenFd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> clientFd<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token comment\">\/\/\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u548c\u8fde\u63a5\u6c60\u7ed1\u5b9a<\/span><br \/>\n    conn_list<span class=\"token punctuation\">[<\/span>clientFd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> clientFd<span class=\"token punctuation\">;<\/span><br \/>\n    conn_list<span class=\"token punctuation\">[<\/span>clientFd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>r_action<span class=\"token punctuation\">.<\/span>accept_callback <span class=\"token operator\">&#061;<\/span> recv_cb<span class=\"token punctuation\">;<\/span><br \/>\n    conn_list<span class=\"token punctuation\">[<\/span>clientFd<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>clientFd<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 \/>\n    <span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span>conn_list<span class=\"token punctuation\">[<\/span>clientFd<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><\/p>\n<p>    <span class=\"token comment\">\/\/\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u52a0\u5165epoll\u7ba1\u7406<\/span><br \/>\n    <span class=\"token function\">set_event<\/span><span class=\"token punctuation\">(<\/span>clientFd<span class=\"token punctuation\">,<\/span>EPOLLIN<span class=\"token punctuation\">,<\/span>EPOLL_CTL_ADD<span class=\"token punctuation\">)<\/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><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u53ef\u8bfb<\/span><br \/>\n    <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> length <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>length <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\">\/\/\u8be5\u8fde\u63a5\u88ab\u65ad\u5f00<\/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><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><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><span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>length <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\">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> length<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><br \/>\n    <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> length<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    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> length<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>EPOLLOUT<span class=\"token punctuation\">,<\/span>EPOLL_CTL_MOD<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u4fee\u6539\u5ba2\u6237\u7aeffd\u7684epoll\u4e8b\u4ef6&#xff0c;\u5173\u6ce8\u53ef\u5199\u4e8b\u4ef6<\/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<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><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/\u5ba2\u6237\u7aeffd\u53ef\u5199<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;send_cb action! clientfd:%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\">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 function\">set_event<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">,<\/span> EPOLLIN<span class=\"token punctuation\">,<\/span> EPOLL_CTL_MOD<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<h3>4\u3001\u8bbe\u7f6e\u56de\u8c03\u51fd\u6570<\/h3>\n<p>\u56de\u8c03\u51fd\u6570\u5728\u8fde\u63a5\u6c60\u4e2d&#xff0c;\u6211\u4eec\u901a\u8fc7fd\u5373\u53ef\u8bbf\u95eefd\u5173\u8054\u7684\u8fde\u63a5\u6c60\u3002\u5728listenfd\u548cclientfd\u521b\u5efa\u65f6&#xff0c;\u8bbe\u7f6e\u5b83\u4eec\u7684\u56de\u8c03\u51fd\u6570\u3002 listenfd&#xff1a;<\/p>\n<p>        <span class=\"token comment\">\/\/\u628a\u76d1\u542c\u5957\u63a5\u5b57\u548c\u8fde\u63a5\u6c60\u5173\u8054<\/span><br \/>\n        conn_list<span class=\"token punctuation\">[<\/span>listenFd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> listenFd<span class=\"token punctuation\">;<\/span><br \/>\n        conn_list<span class=\"token punctuation\">[<\/span>listenFd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>r_action<span class=\"token punctuation\">.<\/span>accept_callback <span class=\"token operator\">&#061;<\/span> accept_cb<span class=\"token punctuation\">;<\/span><\/p>\n<p>clientfd&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u548c\u8fde\u63a5\u6c60\u7ed1\u5b9a<\/span><br \/>\n    conn_list<span class=\"token punctuation\">[<\/span>clientFd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> clientFd<span class=\"token punctuation\">;<\/span><br \/>\n    conn_list<span class=\"token punctuation\">[<\/span>clientFd<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>r_action<span class=\"token punctuation\">.<\/span>accept_callback <span class=\"token operator\">&#061;<\/span> recv_cb<span class=\"token punctuation\">;<\/span><br \/>\n    conn_list<span class=\"token punctuation\">[<\/span>clientFd<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>clientFd<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 \/>\n    <span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span>conn_list<span class=\"token punctuation\">[<\/span>clientFd<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><\/p>\n<h3>5 \u3001\u4e3b\u5faa\u73af<\/h3>\n<p>    <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 comment\">\/\/\u4e3b\u5faa\u73af<\/span><br \/>\n        <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">epoll_event<\/span> evs<span class=\"token punctuation\">[<\/span>EPOLLEVENT_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 keyword\">int<\/span> occuredEvents <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">epoll_wait<\/span><span class=\"token punctuation\">(<\/span>epFd<span class=\"token punctuation\">,<\/span>evs<span class=\"token punctuation\">,<\/span>EPOLLEVENT_SIZE<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><span class=\"token comment\">\/\/occuredEvents\u662f\u6267\u884c\u4e00\u6b21epollwait\u65f6\u53d1\u751f\u4e8b\u4ef6\u7684\u5957\u63a5\u5b57\u6570\u91cf<\/span><\/p>\n<p>        <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> occuredEvents<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 comment\">\/\/\u6839\u636efd\u53d1\u751f\u7684\u4e8b\u4ef6 \u8c03\u7528\u4e0d\u540c\u7684\u56de\u8c03\u51fd\u6570<\/span><br \/>\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>evs<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><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                conn_list<span class=\"token punctuation\">[<\/span>evs<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>r_action<span class=\"token punctuation\">.<\/span><span class=\"token function\">accept_callback<\/span><span class=\"token punctuation\">(<\/span>evs<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\">if<\/span><span class=\"token punctuation\">(<\/span>evs<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><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                conn_list<span class=\"token punctuation\">[<\/span>evs<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><span class=\"token function\">send_callback<\/span><span class=\"token punctuation\">(<\/span>evs<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 punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>\u901a\u8fc7\u4e0a\u8ff05\u4e2a\u6b65\u9aa4&#xff0c;\u6211\u4eec\u5c31\u901a\u8fc7epoll\u5b9e\u73b0\u4e86\u4e00\u4e2a\u7b80\u6613\u7684reator&#xff0c;\u5e76\u4e14\u53ef\u901a\u8fc7\u8be5reactor\u5b9e\u73b0\u767e\u4e07\u7ea7\u5e76\u53d1\u3002<\/p>\n<h2>\u4e94\u3001\u670d\u52a1\u5668\u767e\u4e07\u5e76\u53d1<\/h2>\n<p>\u5f71\u54cd\u670d\u52a1\u5668\u5e76\u53d1\u91cf\u7684\u56e0\u7d20\u6709\u5982\u4e0b&#xff1a;<\/p>\n<h4>1.socket&#xff1a;Too many open files \u64cd\u4f5c\u7cfb\u7edf\u9650\u5236\u6587\u4ef6\u6253\u5f00\u6570\u91cf<\/h4>\n<p>\u901a\u8fc7ulimit -a \u67e5\u770b\u6570\u91cf <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250420080215-6804aa075e27a.png\" alt=\"\" \/> \u5982\u4e0a\u56fe&#xff0c;\u8fd9\u91cc\u7684\u6570\u91cf\u662f65535&#xff0c;\u53ef\u901a\u8fc7ulimit -n 1048576 \u8bbe\u7f6e\u4e3a\u767e\u4e07\u7ea7\u522b\u3002<\/p>\n<h4>2.\u4fee\u6539 vim \/etc\/security\/limits.conf<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250420080215-6804aa0786f23.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u628a\u8fd9\u4e2a\u503c\u4e5f\u8bbe\u7f6e\u4e3a 1048576<\/p>\n<h4>3.\u7cfb\u7edf\u8d44\u6e90\u9650\u5236<\/h4>\n<p>\u901a\u5e38\u4e00\u4e2atcp\u8fde\u63a5\u6709\u5982\u4e0b\u4e94\u5143\u7ec4\u6210 \u670d\u52a1\u5668ip \u670d\u52a1\u5668\u7aef\u53e3 \u5ba2\u6237\u7aefip \u5ba2\u6237\u7aef\u7aef\u53e3 \u7f51\u7edc\u534f\u8bae \u6211\u4eec\u53ef\u4ee5\u5728\u670d\u52a1\u5668\u5f00\u653e\u591a\u4e2a\u7aef\u53e3&#xff0c;\u4e5f\u5c31\u662f\u521b\u5efa\u591a\u4e2alistenfd&#xff0c;\u8fd9\u6837\u53ef\u4ee5\u63d0\u9ad8\u670d\u52a1\u5668\u7684\u5e76\u53d1\u6570\u91cf\u3002<\/p>\n<h4>4.\u5185\u6838\u6a21\u5757\u672a\u52a0\u8f7d<\/h4>\n<p>\u82e5\u51fa\u73b0\u9519\u8bef <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250420080215-6804aa07aaebb.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/>\u6267\u884c sudo modprobe ip_conntrack<\/p>\n<p>\u53c2\u8003\u5b66\u4e60<\/p>\n<p>https:\/\/github.com\/0voice<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb1.5k\u6b21\uff0c\u70b9\u8d5e22\u6b21\uff0c\u6536\u85cf39\u6b21\u3002reactor\u662f\u4e00\u79cd\u4e8b\u4ef6\u9a71\u52a8\u7f16\u7a0b\u624b\u6bb5\uff0c\u5e38\u7528\u4e8e\u9ad8\u5e76\u53d1\u7684\u7f51\u7edcI\/O\u7f16\u7a0b\u4e2d\u3002\u5b83\u7528\u4e8e\u5904\u7406\u5927\u91cf\u7684\u5ba2\u6237\u7aef\u8bf7\u6c42\uff0c\u6839\u636eI\/O\u4e0a\u89e6\u53d1\u7684\u4e0d\u540c\u4e8b\u4ef6\uff0c\u6267\u884c\u4e0d\u540c\u7684\u56de\u8c03\u51fd\u6570\u3002\u9700\u8981\u5b9a\u4e49\u4e09\u4e2a\u56de\u8c03\u51fd\u6570\/\/\u5f53\u76d1\u542c\u5957\u63a5\u5b57\u4e0a\u6709\u53ef\u8bfb\u4e8b\u4ef6\u65f6\u89e6\u53d1\u6b64\u51fd\u6570\uff0c\u5373\u6709\u65b0\u8fde\u63a5\u8fde\u5165\/\/\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u548c\u8fde\u63a5\u6c60\u7ed1\u5b9a\/\/\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u52a0\u5165epoll\u7ba1\u7406\/\/\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u53ef\u8bfb\/\/\u8be5\u8fde\u63a5\u88ab\u65ad\u5f00close(fd);return 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