{"id":124030,"date":"2026-11-08T20:09:11","date_gmt":"2026-11-08T12:09:11","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/124030.html"},"modified":"2026-11-08T20:09:11","modified_gmt":"2026-11-08T12:09:11","slug":"liunx%e7%bd%91%e7%bb%9c%e7%bc%96%e7%a8%8b%e5%a5%97%e6%8e%a5%e5%ad%97%ef%bc%9atcp","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/124030.html","title":{"rendered":"Liunx\u7f51\u7edc\u7f16\u7a0b\u5957\u63a5\u5b57\uff1aTCP"},"content":{"rendered":"<p>        \/* MD \/ \u5bcc\u6587\u672c\u4e2d\u7684 .toc\uff08\u542b\u535a\u5ba2\u56ed\u642c\u5bb6\u7b49\u5d4c\u5957\u7ed3\u6784\uff09\uff1b.toc-box \u5728\u4fa7\u680f\uff0c\u4e0d\u53d7\u5f71\u54cd *\/<br \/>\n        #content_views .toc,<br \/>\n        \/* \u7f16\u8f91\u5668\u5e38\u5728\u76ee\u5f55\u524d\u540e\u63d2\u5165\u7a7a p\uff08:empty \u4ecd\u5360 20px\uff09\uff0c\u4e00\u5e76\u53bb\u6389\u907f\u514d\u9876\u7a7a\u9699 *\/<br \/>\n        #content_views.markdown_views &gt; p:empty:has(+ .toc),<br \/>\n        #content_views.markdown_views &gt; .toc + p:empty,<br \/>\n        \/* \u5bcc\u6587\u672c\u65e7\u7248\u76ee\u5f55\u6807\u8bb0 *\/<br \/>\n        #content_views.htmledit_views #main-toc,<br \/>\n        #content_views.htmledit_views #hr-toc,<br \/>\n        #content_views.htmledit_views p[id*=\\&#8221;-toc\\&#8221;] {<br \/>\n          display: none !important;<br \/>\n        }<br \/>\n        \/* \u76ee\u5f55\u53bb\u6389\u540e\uff0c\u7d27\u8ddf\u7684\u9996\u4e2a\u6807\u9898\u4e0d\u518d\u591a\u51fa\u4e00\u5757\u4e0a\u8fb9\u8ddd *\/<br \/>\n        #content_views.markdown_views &gt; .toc + h1,<br \/>\n        #content_views.markdown_views &gt; .toc + h2,<br \/>\n        #content_views.markdown_views &gt; .toc + h3,<br \/>\n        #content_views.markdown_views &gt; .toc + h4,<br \/>\n        #content_views.markdown_views &gt; .toc + p:empty + h1,<br \/>\n        #content_views.markdown_views &gt; .toc + p:empty + h2,<br \/>\n        #content_views.markdown_views &gt; .toc + p:empty + h3,<br \/>\n        #content_views.markdown_views &gt; .toc + p:empty + h4 {<br \/>\n          margin-top: 0 !important;<br \/>\n        }<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>Liunx\u7f51\u7edc\u7f16\u7a0b\u5957\u63a5\u5b57&#xff1a;TCP<\/li>\n<li>\n<ul>\n<li>TCP Socket API \u8be6\u89e3<\/li>\n<li>\u5c01\u88c5 TCP Socket \u7c7b<\/li>\n<li>TCP \u7f51\u7edc\u7a0b\u5e8f&#xff08;\u5355\u8fde\u63a5\u7248\u672c&#xff09;<\/li>\n<li>\n<ul>\n<li>TCP\u901a\u7528\u670d\u52a1\u5668\u5c01\u88c5<\/li>\n<li>TCP\u901a\u7528\u5ba2\u6237\u7aef\u4e0e\u82f1\u8bd1\u6c49\u5b9e\u73b0<\/li>\n<li>TCP \u7f51\u7edc\u7a0b\u5e8f&#xff08;\u591a\u8fdb\u7a0b\u7248\u672c&#xff09;<\/li>\n<\/ul>\n<\/li>\n<li>TCP \u7f51\u7edc\u7a0b\u5e8f&#xff08;\u591a\u7ebf\u7a0b\u7248\u672c&#xff09;<\/li>\n<li>TCP \u534f\u8bae\u901a\u8baf\u6d41\u7a0b<\/li>\n<li>TCP \u4e0e UDP \u5bf9\u6bd4<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>Liunx\u7f51\u7edc\u7f16\u7a0b\u5957\u63a5\u5b57&#xff1a;TCP<\/h2>\n<p>\u4e0a\u4e00\u7ae0\u6211\u4eec\u4e86\u89e3\u7f51\u7edc\u57fa\u7840\u548cUDP\u4f7f\u7528Linux\u7f51\u7edc\u5957\u63a5\u5b57\u8fdb\u884c\u7f16\u7a0b&#xff0c;\u672c\u7ae0\u8282\u7f51\u7edc\u63a5\u7740\u4e0a\u4e00\u7ae0\u7684\u5185\u5bb9\u6765\u4e86\u89e3TCP\u4f7f\u7528Linux\u7f51\u7edc\u5957\u63a5\u5b57\u8fdb\u884c\u7f16\u7a0b<\/p>\n<h3>TCP Socket API \u8be6\u89e3<\/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;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\/socket.h&gt;<\/span><\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">socket<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> domain<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> type<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> protocol<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> sockfd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span> <span class=\"token operator\">*<\/span>addr<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">socklen_t<\/span> addrlen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">listen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> sockfd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> backlog<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">accept<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> sockfd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span> <span class=\"token operator\">*<\/span>addr<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">socklen_t<\/span> <span class=\"token operator\">*<\/span>addrlen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">connect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> sockfd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span> <span class=\"token operator\">*<\/span>addr<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">socklen_t<\/span> addrlen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>TCP\u7f16\u7a0b\u4e0eUDP\u4e0d\u540c&#xff0c;\u5b83\u662f\u4e00\u79cd\u9762\u5411\u8fde\u63a5\u7684\u534f\u8bae&#xff0c;\u56e0\u6b64API\u7684\u8c03\u7528\u6d41\u7a0b\u66f4\u590d\u6742\u3002<\/p>\n<li>socket()&#xff1a;\u521b\u5efa\u901a\u4fe1\u7aef\u70b9&#xff0c;\u8fd4\u56de\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002domain \u4f20 AF_INET&#xff0c;type \u4f20 SOCK_STREAM&#xff08;\u8868\u793a\u9762\u5411\u6d41\u7684\u4f20\u8f93\u534f\u8bae&#xff09;&#xff0c;protocol \u4e00\u822c\u4f200\u3002<\/li>\n<li>bind()&#xff1a;\u670d\u52a1\u5668\u5c06\u5957\u63a5\u5b57\u4e0e\u56fa\u5b9a\u7684IP\u548c\u7aef\u53e3\u7ed1\u5b9a&#xff0c;\u4ee5\u4fbf\u5ba2\u6237\u7aef\u80fd\u786e\u5207\u627e\u5230\u670d\u52a1\u5668\u3002\u6210\u529f\u8fd4\u56de0&#xff0c;\u5931\u8d25\u8fd4\u56de-1\u3002<\/li>\n<li>listen()&#xff1a;\u670d\u52a1\u5668\u58f0\u660e\u8be5\u5957\u63a5\u5b57\u5904\u4e8e\u76d1\u542c\u72b6\u6001&#xff0c;\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5\u3002backlog \u53c2\u6570\u6307\u5b9a\u4e86\u5904\u4e8e\u7b49\u5f85\u8fde\u63a5\u961f\u5217\u7684\u6700\u5927\u957f\u5ea6&#xff08;\u4e00\u822c\u8bbe\u7f6e\u4e3a5&#xff09;&#xff0c;\u7528\u4e8e\u9650\u5236\u540c\u65f6\u7b49\u5f85\u5904\u7406\u7684\u8fde\u63a5\u6570\u3002<\/li>\n<li>accept()&#xff1a;\u670d\u52a1\u5668\u4ece\u5904\u4e8e\u76d1\u542c\u72b6\u6001\u7684\u5957\u63a5\u5b57\u4e2d\u53d6\u51fa\u4e00\u4e2a\u5df2\u7ecf\u5b8c\u6210\u4e09\u6b21\u63e1\u624b\u7684\u8fde\u63a5\u3002addr \u662f\u4f20\u51fa\u53c2\u6570&#xff0c;\u4fdd\u5b58\u4e86\u5ba2\u6237\u7aefIP\u548c\u7aef\u53e3&#xff1b;addrlen \u662f\u4f20\u5165\u4f20\u51fa\u53c2\u6570&#xff08;\u4f20\u5165\u65f6\u544a\u77e5\u7f13\u51b2\u533a\u5927\u5c0f&#xff0c;\u8fd4\u56de\u65f6\u53cd\u6620\u5b9e\u9645\u957f\u5ea6&#xff09;\u3002\u5982\u679c\u5f53\u524d\u6ca1\u6709\u8fde\u63a5&#xff0c;\u670d\u52a1\u5668\u4f1a\u5728\u6b64\u5904\u963b\u585e\u7b49\u5f85\u3002<\/li>\n<li>connect()&#xff1a;\u5ba2\u6237\u7aef\u4e3b\u52a8\u5411\u670d\u52a1\u5668\u53d1\u8d77\u8fde\u63a5\u3002addr \u53c2\u6570\u586b\u5165\u7684\u662f**\u5bf9\u65b9&#xff08;\u670d\u52a1\u5668&#xff09;**\u7684\u5730\u5740\u4fe1\u606f&#xff0c;\u8fd9\u4e0e bind \u586b\u81ea\u5df1\u5730\u5740\u622a\u7136\u4e0d\u540c\u3002<\/li>\n<p><span class=\"token comment\">\/\/ TCP\u670d\u52a1\u5668\u521d\u59cb\u5316\u4e0e\u8fde\u63a5\u5efa\u7acb\u6838\u5fc3\u903b\u8f91&#xff08;\u4f2a\u4ee3\u7801\u6f14\u793a&#xff09;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> listen_sock <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> serv_addr<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">bzero<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>serv_addr<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>serv_addr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nserv_addr<span class=\"token punctuation\">.<\/span>sin_family <span class=\"token operator\">&#061;<\/span> AF_INET<span class=\"token punctuation\">;<\/span><br \/>\nserv_addr<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\">\/\/ \u76d1\u542c\u4efb\u610f\u672c\u673aIP<\/span><br \/>\nserv_addr<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\">9999<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span>listen_sock<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>serv_addr<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>serv_addr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">listen<\/span><span class=\"token punctuation\">(<\/span>listen_sock<span class=\"token punctuation\">,<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5faa\u73af\u5904\u7406\u5ba2\u6237\u7aef\u8fde\u63a5<\/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> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> cli_addr<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">socklen_t<\/span> cli_len <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>cli_addr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u963b\u585e\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5&#xff0c;\u8fd4\u56de\u65b0\u7684\u5957\u63a5\u5b57\u7528\u4e8e\u901a\u4fe1<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> connfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">accept<\/span><span class=\"token punctuation\">(<\/span>listen_sock<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>cli_addr<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>cli_len<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>connfd <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 function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;accept&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u4f7f\u7528 connfd \u8bfb\u5199\u6570\u636e&#xff0c;listen_sock \u7ee7\u7eed\u76d1\u542c\u540e\u7eed\u8fde\u63a5<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>\u5c01\u88c5 TCP Socket \u7c7b<\/h3>\n<p>\u4e0eUDP\u7c7b\u4f3c&#xff0c;\u9488\u5bf9TCP\u9891\u7e41\u7684API\u8c03\u7528&#xff0c;\u6211\u4eec\u9700\u8981\u5229\u7528C&#043;&#043;\u9762\u5411\u5bf9\u8c61\u7684\u601d\u60f3\u8fdb\u884c\u5c01\u88c5&#xff08;TcpSocket\u7c7b&#xff09;&#xff0c;\u4ee5\u51cf\u5c11\u4ee3\u7801\u5197\u4f59\u3002\u8be5\u7c7b\u5185\u90e8\u7ef4\u62a4\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26 fd_&#xff0c;\u5e76\u5c06 Socket()\u3001Bind()\u3001Listen()\u3001Accept()\u3001Connect()\u3001Recv()\u3001Send() \u7b49\u65b9\u6cd5\u6574\u5408\u5230\u4e00\u4e2a\u7c7b\u4e2d&#xff0c;\u5b9e\u73b0\u4e86\u8d44\u6e90&#xff08;\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff09;\u7684\u81ea\u52a8\u521d\u59cb\u5316\u548c\u5173\u95ed&#xff0c;\u7b26\u5408RAII\u8bbe\u8ba1\u601d\u60f3\u3002<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">pragma<\/span> <span class=\"token expression\">once<\/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;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;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&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;cassert&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;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;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;fcntl.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">typedef<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span> sockaddr<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">typedef<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> sockaddr_in<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5b8f\u5b9a\u4e49&#xff1a;\u7b80\u5316\u8fd4\u56de\u503c\u5224\u65ad<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">CHECK_RET<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span>exp<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token punctuation\">(<\/span>exp<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><\/span><\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">TcpSocket<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token function\">TcpSocket<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">:<\/span> <span class=\"token function\">fd_<\/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> <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token function\">TcpSocket<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">:<\/span> <span class=\"token function\">fd_<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">bool<\/span> <span class=\"token function\">Socket<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        fd_ <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>fd_ <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\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;socket&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/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;open fd &#061; %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 keyword\">return<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">bool<\/span> <span class=\"token function\">Close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/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\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;close fd &#061; %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 keyword\">return<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">bool<\/span> <span class=\"token function\">Bind<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span> ip<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">uint16_t<\/span> port<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        sockaddr_in addr<span class=\"token punctuation\">;<\/span><br \/>\n        addr<span class=\"token punctuation\">.<\/span>sin_family <span class=\"token operator\">&#061;<\/span> AF_INET<span class=\"token punctuation\">;<\/span><br \/>\n        addr<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>ip<span class=\"token punctuation\">.<\/span><span class=\"token function\">c_str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        addr<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><br \/>\n        <span class=\"token keyword\">int<\/span> ret <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span>fd_<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span>sockaddr<span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>addr<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>addr<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>ret <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\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;bind&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">bool<\/span> <span class=\"token function\">Listen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> num<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/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\">listen<\/span><span class=\"token punctuation\">(<\/span>fd_<span class=\"token punctuation\">,<\/span> num<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\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;listen&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">bool<\/span> <span class=\"token function\">Accept<\/span><span class=\"token punctuation\">(<\/span>TcpSocket<span class=\"token operator\">*<\/span> peer<span class=\"token punctuation\">,<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">*<\/span> ip <span class=\"token operator\">&#061;<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">uint16_t<\/span><span class=\"token operator\">*<\/span> port <span class=\"token operator\">&#061;<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        sockaddr_in peer_addr<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>peer_addr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> new_sock <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>sockaddr<span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>peer_addr<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>new_sock <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\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;accept&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/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;accept fd &#061; %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> new_sock<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        peer<span class=\"token operator\">-&gt;<\/span>fd_ <span class=\"token operator\">&#061;<\/span> new_sock<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>ip <span class=\"token operator\">!&#061;<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token operator\">*<\/span>ip <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">inet_ntoa<\/span><span class=\"token punctuation\">(<\/span>peer_addr<span class=\"token punctuation\">.<\/span>sin_addr<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>port <span class=\"token operator\">!&#061;<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token operator\">*<\/span>port <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">ntohs<\/span><span class=\"token punctuation\">(<\/span>peer_addr<span class=\"token punctuation\">.<\/span>sin_port<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">bool<\/span> <span class=\"token function\">Recv<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">*<\/span> buf<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        buf<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">clear<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">char<\/span> tmp<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 comment\">\/\/ [\u6ce8\u610f&#xff01;] \u8fd9\u91cc\u7684\u8bfb\u5e76\u4e0d\u7b97\u5f88\u4e25\u8c28&#xff0c;\u56e0\u4e3a\u4e00\u6b21 recv \u5e76\u4e0d\u80fd\u4fdd\u8bc1\u628a\u6240\u6709\u7684\u6570\u636e\u90fd\u5168\u90e8\u8bfb\u5b8c<\/span><br \/>\n        ssize_t read_size <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">recv<\/span><span class=\"token punctuation\">(<\/span>fd_<span class=\"token punctuation\">,<\/span> tmp<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>tmp<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 keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>read_size <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\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;recv&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/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>read_size <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8bfb\u5230 0 \u8868\u793a\u5bf9\u7aef\u5173\u95ed\u4e86\u8fde\u63a5<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        buf<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">assign<\/span><span class=\"token punctuation\">(<\/span>tmp<span class=\"token punctuation\">,<\/span> read_size<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">bool<\/span> <span class=\"token function\">Send<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span> buf<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        ssize_t write_size <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span>fd_<span class=\"token punctuation\">,<\/span> buf<span class=\"token punctuation\">.<\/span><span class=\"token function\">data<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> buf<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><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 keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>write_size <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\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;send&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">bool<\/span> <span class=\"token function\">Connect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span> ip<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">uint16_t<\/span> port<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        sockaddr_in addr<span class=\"token punctuation\">;<\/span><br \/>\n        addr<span class=\"token punctuation\">.<\/span>sin_family <span class=\"token operator\">&#061;<\/span> AF_INET<span class=\"token punctuation\">;<\/span><br \/>\n        addr<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>ip<span class=\"token punctuation\">.<\/span><span class=\"token function\">c_str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        addr<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><br \/>\n        <span class=\"token keyword\">int<\/span> ret <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">connect<\/span><span class=\"token punctuation\">(<\/span>fd_<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span>sockaddr<span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>addr<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>addr<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>ret <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\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;connect&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">true<\/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\">GetFd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> fd_<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">private<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> fd_<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u6ce8\u610f&#xff1a;\u56e0\u4e3aTCP\u662f\u5b57\u8282\u6d41\u4f20\u8f93&#xff0c;\u6240\u4ee5\u8fd9\u91cc\u7684Recv()\u53ef\u80fd\u4f1a\u51fa\u73b0\u53ea\u8bfb\u5230\u4e00\u90e8\u5206\u5185\u5bb9\u3002\u6b63\u786e\u7684\u63a5\u53d7\u65b9\u6cd5\u6211\u4eec\u540e\u7eed\u8fdb\u884c\u4e86\u89e3\u3002<\/p>\n<h3>TCP \u7f51\u7edc\u7a0b\u5e8f&#xff08;\u5355\u8fde\u63a5\u7248\u672c&#xff09;<\/h3>\n<h4>TCP\u901a\u7528\u670d\u52a1\u5668\u5c01\u88c5<\/h4>\n<p>TCP \u670d\u52a1\u5668\u7684\u6838\u5fc3\u6d41\u7a0b\u662f&#xff1a; socket() -&gt; bind() -&gt; listen() -&gt; \u5faa\u73af accept() -&gt; \u5faa\u73af recv()\/send()\u3002\u4ee5\u4e0b\u901a\u7528\u670d\u52a1\u5668\u5b9e\u73b0\u4e86\u4e00\u4e2a\u6700\u57fa\u672c\u7684\u5355\u8fde\u63a5\u7248\u672c&#xff0c;\u5373\u63a5\u53d7\u4e86\u4e00\u4e2a\u5ba2\u6237\u7aef\u540e&#xff0c;\u670d\u52a1\u5668\u8fdb\u7a0b\u5c31\u5728\u5185\u5c42\u5faa\u73af\u4e2d\u4e00\u76f4\u5904\u7406\u8be5\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42&#xff0c;\u76f4\u5230\u5ba2\u6237\u7aef\u65ad\u5f00\u3002<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">pragma<\/span> <span class=\"token expression\">once<\/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;functional&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\">&#034;tcp_socket.hpp&#034;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">typedef<\/span> std<span class=\"token double-colon punctuation\">::<\/span>function<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span> req<span class=\"token punctuation\">,<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">*<\/span> resp<span class=\"token punctuation\">)<\/span><span class=\"token operator\">&gt;<\/span> Handler<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">TcpServer<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token function\">TcpServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span> ip<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">uint16_t<\/span> port<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">:<\/span> <span class=\"token function\">ip_<\/span><span class=\"token punctuation\">(<\/span>ip<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">port_<\/span><span class=\"token punctuation\">(<\/span>port<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">bool<\/span> <span class=\"token function\">Start<\/span><span class=\"token punctuation\">(<\/span>Handler handler<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ 1. \u521b\u5efa socket<\/span><br \/>\n        <span class=\"token function\">CHECK_RET<\/span><span class=\"token punctuation\">(<\/span>listen_sock_<span class=\"token punctuation\">.<\/span><span class=\"token function\">Socket<\/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 comment\">\/\/ 2. \u7ed1\u5b9a\u7aef\u53e3\u53f7<\/span><br \/>\n        <span class=\"token function\">CHECK_RET<\/span><span class=\"token punctuation\">(<\/span>listen_sock_<span class=\"token punctuation\">.<\/span><span class=\"token function\">Bind<\/span><span class=\"token punctuation\">(<\/span>ip_<span class=\"token punctuation\">,<\/span> port_<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/ 3. \u8fdb\u884c\u76d1\u542c<\/span><br \/>\n        <span class=\"token function\">CHECK_RET<\/span><span class=\"token punctuation\">(<\/span>listen_sock_<span class=\"token punctuation\">.<\/span><span class=\"token function\">Listen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 4. \u8fdb\u5165\u4e8b\u4ef6\u5faa\u73af<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/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 comment\">\/\/ 5. \u8fdb\u884c accept<\/span><br \/>\n            TcpSocket new_sock<span class=\"token punctuation\">;<\/span><br \/>\n            std<span class=\"token double-colon punctuation\">::<\/span>string ip<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">uint16_t<\/span> port <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>listen_sock_<span class=\"token punctuation\">.<\/span><span class=\"token function\">Accept<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>new_sock<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>ip<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>port<span class=\"token punctuation\">)<\/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 function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;[client %s:%d] connect!\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> ip<span class=\"token punctuation\">.<\/span><span class=\"token function\">c_str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> port<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>            <span class=\"token comment\">\/\/ 6. \u8fdb\u884c\u5faa\u73af\u8bfb\u5199<\/span><br \/>\n            <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">;<\/span><span class=\"token punctuation\">;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                std<span class=\"token double-colon punctuation\">::<\/span>string req<span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token comment\">\/\/ 7. \u8bfb\u53d6\u8bf7\u6c42&#xff0c;\u8bfb\u53d6\u5931\u8d25\u5219\u7ed3\u675f\u5faa\u73af<\/span><br \/>\n                <span class=\"token keyword\">bool<\/span> ret <span class=\"token operator\">&#061;<\/span> new_sock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Recv<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>req<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>ret<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;[client %s:%d] disconnect!\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> ip<span class=\"token punctuation\">.<\/span><span class=\"token function\">c_str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> port<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    new_sock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token comment\">\/\/ 8. \u8ba1\u7b97\u54cd\u5e94<\/span><br \/>\n                std<span class=\"token double-colon punctuation\">::<\/span>string resp<span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token function\">handler<\/span><span class=\"token punctuation\">(<\/span>req<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>resp<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token comment\">\/\/ 9. \u5199\u56de\u54cd\u5e94<\/span><br \/>\n                new_sock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Send<\/span><span class=\"token punctuation\">(<\/span>resp<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 keyword\">return<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">private<\/span><span class=\"token operator\">:<\/span><br \/>\n    TcpSocket listen_sock_<span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>string ip_<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">uint16_t<\/span> port_<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\u5355\u8fde\u63a5\u7248\u672c\u7684 TCP \u670d\u52a1\u5668\u5b58\u5728\u4e25\u91cd\u7684\u5e76\u53d1\u7f3a\u9677\u3002\u56e0\u4e3a accept \u83b7\u53d6\u5230\u65b0\u8fde\u63a5\u540e&#xff0c;\u7a0b\u5e8f\u8fdb\u5165\u4e86\u5185\u5c42 for(;;) \u5faa\u73af\u4e0d\u65ad recv\u3002<\/li>\n<li>\u5982\u679c\u8be5\u5ba2\u6237\u7aef\u4e00\u76f4\u4e0d\u53d1\u9001\u6570\u636e\u4e5f\u4e0d\u5173\u95ed\u8fde\u63a5&#xff0c;\u6b64\u65f6\u6267\u884c\u6d41\u4f1a\u963b\u585e\u5728\u5185\u5c42\u7684 Recv \u4e0a\u3002\u6b64\u65f6\u5982\u679c\u6709\u7b2c\u4e8c\u4e2a\u5ba2\u6237\u7aef\u53d1\u8d77\u8fde\u63a5\u8bf7\u6c42&#xff0c;\u670d\u52a1\u5668\u5c06\u65e0\u6cd5\u6267\u884c\u5230\u5916\u5c42\u7684 accept&#xff0c;\u5bfc\u81f4\u7b2c\u4e8c\u4e2a\u5ba2\u6237\u7aef\u88ab\u6302\u8d77\u65e0\u6cd5\u901a\u4fe1\u3002<\/li>\n<li>\u9700\u8981\u5f15\u5165\u591a\u8fdb\u7a0b\u3001\u591a\u7ebf\u7a0b\u6216 I\/O \u591a\u8def\u590d\u7528&#xff08;\u5982 epoll&#xff09;\u6280\u672f&#xff0c;\u5c06\u201c\u63a5\u53d7\u8fde\u63a5\u201d\u548c\u201c\u5904\u7406\u4e1a\u52a1\u201d\u89e3\u8026\u3002<\/li>\n<\/ul>\n<h4>TCP\u901a\u7528\u5ba2\u6237\u7aef\u4e0e\u82f1\u8bd1\u6c49\u5b9e\u73b0<\/h4>\n<p>\u5ba2\u6237\u7aef\u903b\u8f91\u8f83\u4e3a\u7b80\u5355&#xff1a;socket() -&gt; connect() -&gt; \u5faa\u73af send()\/recv()\u3002\u7531\u4e8e TCP \u662f\u9762\u5411\u8fde\u63a5\u7684&#xff0c;\u5ba2\u6237\u7aef\u4e0d\u9700\u8981\u5728\u542f\u52a8\u65f6 bind \u7aef\u53e3&#xff0c;\u5185\u6838\u4f1a\u81ea\u52a8\u5206\u914d\u3002<\/p>\n<p>tcp_client.hpp<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">pragma<\/span> <span class=\"token expression\">once<\/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\">&#034;tcp_socket.hpp&#034;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">TcpClient<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token function\">TcpClient<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span> ip<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">uint16_t<\/span> port<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">:<\/span> <span class=\"token function\">ip_<\/span><span class=\"token punctuation\">(<\/span>ip<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">port_<\/span><span class=\"token punctuation\">(<\/span>port<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        sock_<span class=\"token punctuation\">.<\/span><span class=\"token function\">Socket<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token operator\">~<\/span><span class=\"token function\">TcpClient<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        sock_<span class=\"token punctuation\">.<\/span><span class=\"token function\">Close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">bool<\/span> <span class=\"token function\">Connect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> sock_<span class=\"token punctuation\">.<\/span><span class=\"token function\">Connect<\/span><span class=\"token punctuation\">(<\/span>ip_<span class=\"token punctuation\">,<\/span> port_<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">bool<\/span> <span class=\"token function\">Recv<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">*<\/span> buf<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> sock_<span class=\"token punctuation\">.<\/span><span class=\"token function\">Recv<\/span><span class=\"token punctuation\">(<\/span>buf<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">bool<\/span> <span class=\"token function\">Send<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span> buf<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> sock_<span class=\"token punctuation\">.<\/span><span class=\"token function\">Send<\/span><span class=\"token punctuation\">(<\/span>buf<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">private<\/span><span class=\"token operator\">:<\/span><br \/>\n    TcpSocket sock_<span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>string ip_<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">uint16_t<\/span> port_<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>dict_server.cc<\/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;tcp_server.hpp&#034;<\/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;unordered_map&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;iostream&gt;<\/span><\/span><\/p>\n<p>std<span class=\"token double-colon punctuation\">::<\/span>unordered_map<span class=\"token operator\">&lt;<\/span>std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token punctuation\">,<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&gt;<\/span> g_dict<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">Translate<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span> req<span class=\"token punctuation\">,<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">*<\/span> resp<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">auto<\/span> it <span class=\"token operator\">&#061;<\/span> g_dict<span class=\"token punctuation\">.<\/span><span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>req<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>it <span class=\"token operator\">&#061;&#061;<\/span> g_dict<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/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 operator\">*<\/span>resp <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u672a\u67e5\u5230!&#034;<\/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><br \/>\n    <span class=\"token operator\">*<\/span>resp <span class=\"token operator\">&#061;<\/span> it<span class=\"token operator\">-&gt;<\/span>second<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 keyword\">int<\/span> argc<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> argv<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 keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>argc <span class=\"token operator\">!&#061;<\/span> <span class=\"token number\">3<\/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;Usage .\/dict_server [ip] [port]\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    g_dict<span class=\"token punctuation\">.<\/span><span class=\"token function\">insert<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">make_pair<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;hello&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\u4f60\u597d&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    g_dict<span class=\"token punctuation\">.<\/span><span class=\"token function\">insert<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">make_pair<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;world&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\u4e16\u754c&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    g_dict<span class=\"token punctuation\">.<\/span><span class=\"token function\">insert<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">make_pair<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;c&#043;&#043;&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\u6700\u597d\u7684\u7f16\u7a0b\u8bed\u8a00&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    TcpServer <span class=\"token function\">server<\/span><span class=\"token punctuation\">(<\/span>argv<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">atoi<\/span><span class=\"token punctuation\">(<\/span>argv<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    server<span class=\"token punctuation\">.<\/span><span class=\"token function\">Start<\/span><span class=\"token punctuation\">(<\/span>Translate<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<p>dict_client.cc<\/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;tcp_client.hpp&#034;<\/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;iostream&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> argc<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> argv<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 keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>argc <span class=\"token operator\">!&#061;<\/span> <span class=\"token number\">3<\/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;Usage .\/dict_client [ip] [port]\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    TcpClient <span class=\"token function\">client<\/span><span class=\"token punctuation\">(<\/span>argv<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">atoi<\/span><span class=\"token punctuation\">(<\/span>argv<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/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 keyword\">bool<\/span> ret <span class=\"token operator\">&#061;<\/span> client<span class=\"token punctuation\">.<\/span><span class=\"token function\">Connect<\/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><span class=\"token operator\">!<\/span>ret<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/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 punctuation\">;<\/span><span class=\"token punctuation\">;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>string word<span class=\"token punctuation\">;<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u60a8\u8981\u67e5\u7684\u5355\u8bcd: &#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cin <span class=\"token operator\">&gt;&gt;<\/span> word<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>std<span class=\"token double-colon punctuation\">::<\/span>cin<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Good Bye&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        client<span class=\"token punctuation\">.<\/span><span class=\"token function\">Send<\/span><span class=\"token punctuation\">(<\/span>word<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>string result<span class=\"token punctuation\">;<\/span><br \/>\n        client<span class=\"token punctuation\">.<\/span><span class=\"token function\">Recv<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>result<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> word <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034; \u610f\u601d\u662f &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> result <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <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<h4>TCP \u7f51\u7edc\u7a0b\u5e8f&#xff08;\u591a\u8fdb\u7a0b\u7248\u672c&#xff09;<\/h4>\n<p>\u4e3a\u4e86\u652f\u6301\u591a\u8fde\u63a5&#xff0c;\u53ef\u4ee5\u5728 accept() \u6210\u529f\u8fd4\u56de\u540e&#xff0c;\u8c03\u7528 fork() \u521b\u5efa\u5b50\u8fdb\u7a0b\u3002\u8ba9\u5b50\u8fdb\u7a0b\u53bb\u6267\u884c\u5185\u90e8\u7684 recv\/send \u5faa\u73af&#xff0c;\u800c\u7236\u8fdb\u7a0b\u7ee7\u7eed\u53bb\u6267\u884c\u5916\u5c42\u7684 accept()\u3002\u540c\u65f6&#xff0c;\u4e3a\u4e86\u9632\u6b62\u5b50\u8fdb\u7a0b\u9000\u51fa\u540e\u53d8\u6210\u50f5\u5c38\u8fdb\u7a0b (Zombie Process)&#xff0c;\u9700\u8981\u5904\u7406 SIGCHLD \u4fe1\u53f7\u3002<\/p>\n<p>tcp_process_server.hpp<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">pragma<\/span> <span class=\"token expression\">once<\/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;functional&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;signal.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\/wait.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\">&#034;tcp_socket.hpp&#034;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">typedef<\/span> std<span class=\"token double-colon punctuation\">::<\/span>function<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span> req<span class=\"token punctuation\">,<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">*<\/span> resp<span class=\"token punctuation\">)<\/span><span class=\"token operator\">&gt;<\/span> Handler<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">TcpProcessServer<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token function\">TcpProcessServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span> ip<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">uint16_t<\/span> port<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">:<\/span> <span class=\"token function\">ip_<\/span><span class=\"token punctuation\">(<\/span>ip<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">port_<\/span><span class=\"token punctuation\">(<\/span>port<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u4fe1\u53f7\u6ce8\u518c&#xff1a;\u5ffd\u7565\u5b50\u8fdb\u7a0b\u9000\u51fa\u4fe1\u53f7&#xff0c;\u7531\u7cfb\u7edf\u81ea\u52a8\u56de\u6536&#xff0c;\u9632\u6b62\u50f5\u5c38\u8fdb\u7a0b<\/span><br \/>\n        <span class=\"token function\">signal<\/span><span class=\"token punctuation\">(<\/span>SIGCHLD<span class=\"token punctuation\">,<\/span> SIG_IGN<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">void<\/span> <span class=\"token function\">ProcessConnect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> TcpSocket<span class=\"token operator\">&amp;<\/span> new_sock<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span> ip<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">uint16_t<\/span> port<span class=\"token punctuation\">,<\/span> Handler handler<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">;<\/span><span class=\"token punctuation\">;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            std<span class=\"token double-colon punctuation\">::<\/span>string req<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">bool<\/span> ret <span class=\"token operator\">&#061;<\/span> new_sock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Recv<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>req<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>ret<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;[client %s:%d] disconnect!\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> ip<span class=\"token punctuation\">.<\/span><span class=\"token function\">c_str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> port<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                new_sock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            std<span class=\"token double-colon punctuation\">::<\/span>string resp<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">handler<\/span><span class=\"token punctuation\">(<\/span>req<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>resp<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            new_sock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Send<\/span><span class=\"token punctuation\">(<\/span>resp<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 keyword\">bool<\/span> <span class=\"token function\">Start<\/span><span class=\"token punctuation\">(<\/span>Handler handler<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">CHECK_RET<\/span><span class=\"token punctuation\">(<\/span>listen_sock_<span class=\"token punctuation\">.<\/span><span class=\"token function\">Socket<\/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\">CHECK_RET<\/span><span class=\"token punctuation\">(<\/span>listen_sock_<span class=\"token punctuation\">.<\/span><span class=\"token function\">Bind<\/span><span class=\"token punctuation\">(<\/span>ip_<span class=\"token punctuation\">,<\/span> port_<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">CHECK_RET<\/span><span class=\"token punctuation\">(<\/span>listen_sock_<span class=\"token punctuation\">.<\/span><span class=\"token function\">Listen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">;<\/span><span class=\"token punctuation\">;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            TcpSocket new_sock<span class=\"token punctuation\">;<\/span><br \/>\n            std<span class=\"token double-colon punctuation\">::<\/span>string ip<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">uint16_t<\/span> port <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>listen_sock_<span class=\"token punctuation\">.<\/span><span class=\"token function\">Accept<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>new_sock<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>ip<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>port<span class=\"token punctuation\">)<\/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 function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;[client %s:%d] connect!\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> ip<span class=\"token punctuation\">.<\/span><span class=\"token function\">c_str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> port<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>            pid_t 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 number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token comment\">\/\/ \u5b50\u8fdb\u7a0b<\/span><br \/>\n                <span class=\"token comment\">\/\/ \u6ce8\u610f&#xff1a;\u5b50\u8fdb\u7a0b\u4e0d\u9700\u8981\u76d1\u542c\u5957\u63a5\u5b57<\/span><br \/>\n                listen_sock_<span class=\"token punctuation\">.<\/span><span class=\"token function\">Close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token function\">ProcessConnect<\/span><span class=\"token punctuation\">(<\/span>new_sock<span class=\"token punctuation\">,<\/span> ip<span class=\"token punctuation\">,<\/span> port<span class=\"token punctuation\">,<\/span> handler<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token comment\">\/\/ \u5b50\u8fdb\u7a0b\u5904\u7406\u5b8c\u6bd5&#xff0c;\u5fc5\u987b\u9000\u51fa&#xff0c;\u5426\u5219\u4f1a\u56de\u5230\u5faa\u73af\u91cc\u7ee7\u7eed accept<\/span><br \/>\n                <span class=\"token function\">exit<\/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> <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>pid <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token comment\">\/\/ \u7236\u8fdb\u7a0b<\/span><br \/>\n                <span class=\"token comment\">\/\/ \u6ce8\u610f&#xff1a;\u7236\u8fdb\u7a0b\u4e0d\u9700\u8981\u5df2\u5efa\u7acb\u8fde\u63a5\u7684\u5957\u63a5\u5b57<\/span><br \/>\n                new_sock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;fork&#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 punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">private<\/span><span class=\"token operator\">:<\/span><br \/>\n    TcpSocket listen_sock_<span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>string ip_<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">uint16_t<\/span> port_<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\u5b50\u8fdb\u7a0b\u7ee7\u627f\u4e86\u7236\u8fdb\u7a0b\u7684 listen_sock_ \u548c\u7236\u8fdb\u7a0b\u7ee7\u627f\u4e86 new_sock\u3002<\/li>\n<li>\u6587\u4ef6\u63cf\u8ff0\u7b26\u5728\u8fdb\u7a0b\u95f4\u662f\u5171\u4eab\u7684\u3002\u5982\u679c\u7236\u8fdb\u7a0b\u4e0d\u5173\u95ed new_sock&#xff0c;\u4f1a\u5bfc\u81f4\u8fde\u63a5\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u5f15\u7528\u8ba1\u6570\u65e0\u6cd5\u5f52\u96f6&#xff0c;\u5ba2\u6237\u7aef\u65ad\u5f00\u540e\u8d44\u6e90\u4e0d\u91ca\u653e&#xff1b;\u5982\u679c\u5b50\u8fdb\u7a0b\u4e0d\u5173\u95ed listen_sock_&#xff0c;\u5982\u679c\u7236\u8fdb\u7a0b\u9000\u51fa\u4e86&#xff0c;\u5b50\u8fdb\u7a0b\u4ecd\u7136\u5360\u7528\u7740\u76d1\u542c\u7aef\u53e3&#xff0c;\u5bfc\u81f4\u670d\u52a1\u5668\u65e0\u6cd5\u91cd\u542f\u3002<\/li>\n<li>\u5728\u5b50\u8fdb\u7a0b\u4e2d listen_sock_.Close();&#xff0c;\u5728\u7236\u8fdb\u7a0b\u4e2d new_sock.Close();\u3002<\/li>\n<\/ul>\n<h3>TCP \u7f51\u7edc\u7a0b\u5e8f&#xff08;\u591a\u7ebf\u7a0b\u7248\u672c&#xff09;<\/h3>\n<p>\u591a\u7ebf\u7a0b\u7248\u672c\u672c\u8d28\u4e0a\u4e0e\u591a\u8fdb\u7a0b\u7248\u672c\u7c7b\u4f3c&#xff0c;\u4f46\u662f\u5728\u540c\u4e00\u4e2a\u8fdb\u7a0b\u5185\u5229\u7528\u7ebf\u7a0b\u5904\u7406\u8fde\u63a5\u3002\u8fd9\u9700\u8981\u7528 pthread_create \u521b\u5efa\u7ebf\u7a0b&#xff0c;\u4e14\u4f20\u9012\u7ed9\u7ebf\u7a0b\u7684\u51fd\u6570\u5fc5\u987b\u662f static \u7684&#xff08;\u56e0\u4e3a\u666e\u901a\u6210\u5458\u51fd\u6570\u5e26\u6709\u9690\u542b\u7684 this \u6307\u9488&#xff09;&#xff0c;\u5e76\u9700\u8981\u5c01\u88c5\u4e00\u4e2a\u5305\u542b new_sock\u3001ip\u3001port \u548c handler \u7684\u7ed3\u6784\u4f53 ThreadArg \u4f20\u5165\u7ebf\u7a0b\u5165\u53e3\u51fd\u6570\u3002\u540c\u6837&#xff0c;\u4f7f\u7528 pthread_detach \u5206\u79bb\u7ebf\u7a0b&#xff0c;\u8ba9\u7cfb\u7edf\u81ea\u52a8\u56de\u6536\u8d44\u6e90\u3002<\/p>\n<p>tcp_thread_server.hpp<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">pragma<\/span> <span class=\"token expression\">once<\/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;functional&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\">&#034;tcp_socket.hpp&#034;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">typedef<\/span> std<span class=\"token double-colon punctuation\">::<\/span>function<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span><span class=\"token punctuation\">,<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&gt;<\/span> Handler<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">ThreadArg<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    TcpSocket new_sock<span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>string ip<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">uint16_t<\/span> port<span class=\"token punctuation\">;<\/span><br \/>\n    Handler handler<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">TcpThreadServer<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token function\">TcpThreadServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span> ip<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">uint16_t<\/span> port<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">:<\/span> <span class=\"token function\">ip_<\/span><span class=\"token punctuation\">(<\/span>ip<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">port_<\/span><span class=\"token punctuation\">(<\/span>port<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">bool<\/span> <span class=\"token function\">Start<\/span><span class=\"token punctuation\">(<\/span>Handler handler<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">CHECK_RET<\/span><span class=\"token punctuation\">(<\/span>listen_sock_<span class=\"token punctuation\">.<\/span><span class=\"token function\">Socket<\/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\">CHECK_RET<\/span><span class=\"token punctuation\">(<\/span>listen_sock_<span class=\"token punctuation\">.<\/span><span class=\"token function\">Bind<\/span><span class=\"token punctuation\">(<\/span>ip_<span class=\"token punctuation\">,<\/span> port_<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">CHECK_RET<\/span><span class=\"token punctuation\">(<\/span>listen_sock_<span class=\"token punctuation\">.<\/span><span class=\"token function\">Listen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">;<\/span><span class=\"token punctuation\">;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            ThreadArg<span class=\"token operator\">*<\/span> arg <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token function\">ThreadArg<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            arg<span class=\"token operator\">-&gt;<\/span>handler <span class=\"token operator\">&#061;<\/span> handler<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">bool<\/span> ret <span class=\"token operator\">&#061;<\/span> listen_sock_<span class=\"token punctuation\">.<\/span><span class=\"token function\">Accept<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>arg<span class=\"token operator\">-&gt;<\/span>new_sock<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>arg<span class=\"token operator\">-&gt;<\/span>ip<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>arg<span class=\"token operator\">-&gt;<\/span>port<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>ret<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">delete<\/span> arg<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ Accept \u5931\u8d25&#xff0c;\u9700\u6e05\u7406\u5185\u5b58<\/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\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;[client %s:%d] connect!\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> arg<span class=\"token operator\">-&gt;<\/span>ip<span class=\"token punctuation\">.<\/span><span class=\"token function\">c_str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> arg<span class=\"token operator\">-&gt;<\/span>port<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>            <span class=\"token comment\">\/\/ 6. \u521b\u5efa\u65b0\u7684\u7ebf\u7a0b\u5b8c\u6210\u5177\u4f53\u64cd\u4f5c<\/span><br \/>\n            pthread_t tid<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">pthread_create<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>tid<span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">,<\/span> ThreadEntry<span class=\"token punctuation\">,<\/span> arg<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token comment\">\/\/ \u7ebf\u7a0b\u5206\u79bb&#xff0c;\u9000\u51fa\u65f6\u81ea\u52a8\u56de\u6536\u8d44\u6e90<\/span><br \/>\n            <span class=\"token function\">pthread_detach<\/span><span class=\"token punctuation\">(<\/span>tid<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8fd9\u91cc\u7684\u6210\u5458\u51fd\u6570\u5fc5\u987b\u662f static&#xff0c;\u56e0\u4e3a pthread_create \u9700\u8981 void*(*)(void*)<\/span><br \/>\n    <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span><span class=\"token operator\">*<\/span> <span class=\"token function\">ThreadEntry<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token operator\">*<\/span> arg<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        ThreadArg<span class=\"token operator\">*<\/span> p <span class=\"token operator\">&#061;<\/span> <span class=\"token generic-function\"><span class=\"token function\">reinterpret_cast<\/span><span class=\"token generic class-name\"><span class=\"token operator\">&lt;<\/span>ThreadArg<span class=\"token operator\">*<\/span><span class=\"token operator\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span>arg<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">ProcessConnect<\/span><span class=\"token punctuation\">(<\/span>p<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u4e00\u5b9a\u8981\u8bb0\u5f97\u91ca\u653e\u5185\u5b58&#xff01;&#xff01;&#xff01;\u4e5f\u8981\u8bb0\u5f97\u5173\u95ed\u6587\u4ef6\u63cf\u8ff0\u7b26<\/span><br \/>\n        p<span class=\"token operator\">-&gt;<\/span>new_sock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">delete<\/span> p<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5904\u7406\u5355\u6b21\u8fde\u63a5\u3002\u8fd9\u4e2a\u51fd\u6570\u4e5f\u5f97\u662f static&#xff0c;\u56e0\u4e3a\u5b83\u4e0d\u9700\u8981 this \u6307\u9488<\/span><br \/>\n    <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">ProcessConnect<\/span><span class=\"token punctuation\">(<\/span>ThreadArg<span class=\"token operator\">*<\/span> arg<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">;<\/span><span class=\"token punctuation\">;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            std<span class=\"token double-colon punctuation\">::<\/span>string req<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">bool<\/span> ret <span class=\"token operator\">&#061;<\/span> arg<span class=\"token operator\">-&gt;<\/span>new_sock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Recv<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>req<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>ret<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;[client %s:%d] disconnected!\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> arg<span class=\"token operator\">-&gt;<\/span>ip<span class=\"token punctuation\">.<\/span><span class=\"token function\">c_str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> arg<span class=\"token operator\">-&gt;<\/span>port<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            std<span class=\"token double-colon punctuation\">::<\/span>string resp<span class=\"token punctuation\">;<\/span><br \/>\n            arg<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">handler<\/span><span class=\"token punctuation\">(<\/span>req<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>resp<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            arg<span class=\"token operator\">-&gt;<\/span>new_sock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Send<\/span><span class=\"token punctuation\">(<\/span>resp<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;[client %s:%d] req: %s, resp: %s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> arg<span class=\"token operator\">-&gt;<\/span>ip<span class=\"token punctuation\">.<\/span><span class=\"token function\">c_str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> arg<span class=\"token operator\">-&gt;<\/span>port<span class=\"token punctuation\">,<\/span> req<span class=\"token punctuation\">.<\/span><span class=\"token function\">c_str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> resp<span class=\"token punctuation\">.<\/span><span class=\"token function\">c_str<\/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 punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">private<\/span><span class=\"token operator\">:<\/span><br \/>\n    TcpSocket listen_sock_<span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>string ip_<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">uint16_t<\/span> port_<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h3>TCP \u534f\u8bae\u901a\u8baf\u6d41\u7a0b<\/h3>\n<p>\u4e0b\u56fe\u662f\u57fa\u4e8eTCP\u534f\u8bae\u7684\u5ba2\u6237\u7aef\/\u670d\u52a1\u5668\u7a0b\u5e8f\u7684\u4e00\u822c\u6d41\u7a0b&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/11\/20261108120908-6af0666468237.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<li>\n<p>\u5efa\u7acb\u8fde\u63a5&#xff08;\u4e09\u6b21\u63e1\u624b&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\u5ba2\u6237\u7aef\u8c03\u7528 connect()&#xff1a;TCP \u534f\u8bae\u5c42\u53d1\u51fa SYN \u6bb5&#xff0c;\u5ba2\u6237\u7aef\u8fdb\u5165 SYN_SENT \u72b6\u6001\u3002<\/li>\n<li>\u670d\u52a1\u5668\u6536\u5230 SYN&#xff1a;TCP \u534f\u8bae\u5c42\u8fd4\u56de SYN&#043;ACK \u6bb5&#xff0c;\u670d\u52a1\u5668\u8fdb\u5165 SYN_RCVD \u72b6\u6001\u3002<\/li>\n<li>\u5ba2\u6237\u7aef\u6536\u5230 SYN&#043;ACK&#xff1a;connect() \u8fd4\u56de&#xff0c;\u540c\u65f6 TCP \u534f\u8bae\u5c42\u53d1\u9001 ACK \u6bb5&#xff0c;\u53cc\u65b9\u8fdb\u5165 ESTABLISHED \u6001\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u6570\u636e\u4f20\u8f93&#xff1a;<\/p>\n<ul>\n<li>\u8fde\u63a5\u5efa\u7acb\u540e&#xff0c;TCP \u63d0\u4f9b\u5168\u53cc\u5de5\u901a\u4fe1\u3002\u5ba2\u6237\u7aef\u8c03\u7528 write() \/ send() \u53d1\u9001\u6570\u636e&#xff0c;\u670d\u52a1\u5668\u4ece read(), recv() \u8bfb\u6570\u636e\u3002\u5982\u679c\u6ca1\u6709\u6570\u636e&#xff0c;read() \u4f1a\u963b\u585e\u7b49\u5f85\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u65ad\u5f00\u8fde\u63a5&#xff08;\u56db\u6b21\u6325\u624b&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\u5ba2\u6237\u7aef\u8c03\u7528 close()&#xff1a;TCP \u534f\u8bae\u5c42\u53d1\u9001 FIN \u6bb5&#xff0c;\u8fdb\u5165 FIN_WAIT_1 \u72b6\u6001\u3002<\/li>\n<li>\u670d\u52a1\u5668\u6536\u5230 FIN&#xff1a;TCP \u534f\u8bae\u5c42\u8fd4\u56de ACK \u6bb5&#xff0c;\u670d\u52a1\u5668\u8fdb\u5165 CLOSE_WAIT \u72b6\u6001\u3002\u6b64\u65f6\u670d\u52a1\u5668\u4f1a\u6536\u5230 read() \u8fd4\u56de 0&#xff0c;\u544a\u77e5\u5e94\u7528\u5c42\u5bf9\u7aef\u5df2\u5173\u95ed\u3002<\/li>\n<li>\u670d\u52a1\u5668\u8c03\u7528 close()&#xff1a;TCP \u534f\u8bae\u5c42\u53d1\u9001 FIN \u6bb5&#xff0c;\u670d\u52a1\u5668\u8fdb\u5165 LAST_ACK \u72b6\u6001\u3002<\/li>\n<li>\u5ba2\u6237\u7aef\u6536\u5230 FIN&#xff1a;TCP \u534f\u8bae\u5c42\u8fd4\u56de ACK \u6bb5&#xff0c;\u8fdb\u5165 TIME_WAIT \u72b6\u6001&#xff0c;\u7b49\u5f85 2MSL \u540e\u5f7b\u5e95\u5173\u95ed\u3002<\/li>\n<\/ul>\n<\/li>\n<p>\u5982\u4f55\u7406\u89e3TCP\u7684\u4e09\u6b21\u63e1\u624b\u548c\u56db\u6b21\u6325\u624b\u3002<\/p>\n<ul>\n<li>\u6211\u4eec\u901a\u8fc7\u8c08\u604b\u7231\u7684\u4f8b\u5b50\u6765\u6bd4\u55bb\u4e00\u4e0b&#xff1a;\u6211\u4eec\u5c06\u5ba2\u6237\u7aef\u60f3\u8c61\u6210\u8c08\u604b\u7231\u4e2d\u7684\u7537\u751f&#xff0c;\u670d\u52a1\u7aef\u60f3\u8c61\u6210\u5973\u751f\u3002\u8c08\u604b\u7231\u6211\u77e5\u9053\u9996\u5148\u5f97\u6709\u5bf9\u8c61\u624d\u80fd\u8c08&#xff0c;\u7537\u751f\u627e\u5973\u751f\u8c08\u604b\u7231\u9996\u5148\u5c31\u662f\u8981\u627e\u559c\u6b22\u7684\u5973\u751f\u8fdb\u884c\u8868\u767d&#xff0c;\u540c\u65f6\u5973\u751f\u8981\u540c\u610f\u4e86\u4f60\u4eec\u624d\u80fd\u5728\u4e00\u8d77\u8c08\u604b\u7231\u3002<\/li>\n<li>\u60c5\u611f\u4e2d\u603b\u4f1a\u9047\u5230\u4e00\u4e0b\u632b\u6298\u548c\u77db\u76fe\u591a\u4e86\u6216\u8005\u4e0d\u89e3\u51b3\u5c31\u4f1a\u5bfc\u81f4\u53cc\u65b9\u8d70\u4e0d\u4e0b\u53bb\u5206\u624b\u4e86&#xff0c;\u56db\u6b21\u6325\u624b\u5c31\u50cf\u662f\u7537\u751f\u95ee\u5973\u751f\u4f60\u5230\u5e95\u7231\u4e0d\u7231\u6211&#xff0c;\u56e0\u4e3a\u8fd9\u4e2a\u95ee\u9898\u95ee\u7684\u592a\u591a\u4e86\u5973\u751f\u5c31\u4e00\u6c14\u4e4b\u4e0b\u8bf4\u4e0d\u7231\u4f60\u5e76\u5bf9\u540e\u7eed\u4f60\u7684\u4fe1\u606f\u8fdb\u884c\u5df2\u8bfb\u4e0d\u56de&#xff0c;\u7537\u751f\u5c31\u60f3\u633d\u7559\u8fd9\u6bb5\u5173\u7cfb\u6bd5\u7adf\u8c08\u4e86\u8fd9\u4e48\u4e45&#xff0c;\u7537\u751f\u5c31\u81ea\u6211\u5b89\u6170\u8bf4\u518d\u7b49\u4e00\u6bb5\u65f6\u95f4\u5982\u679c\u8fd8\u662f\u5df2\u8bfb\u4e0d\u56de\u5c31\u7231\u8c01\u8c01\u4e5f\u4e0d\u8c08\u4e86\u3002<\/li>\n<\/ul>\n<h3>TCP \u4e0e UDP \u5bf9\u6bd4<\/h3>\n<ul>\n<li>TCP&#xff1a;\u9762\u5411\u8fde\u63a5\u7684\u3001\u53ef\u9760\u7684\u3001\u9762\u5411\u5b57\u8282\u6d41\u7684\u4f20\u8f93\u5c42\u534f\u8bae\u3002\u901a\u8fc7\u5e8f\u5217\u53f7\u3001\u786e\u8ba4\u5e94\u7b54\u3001\u8d85\u65f6\u91cd\u4f20\u3001\u6d41\u91cf\u63a7\u5236\u3001\u62e5\u585e\u63a7\u5236\u7b49\u673a\u5236&#xff0c;\u4fdd\u8bc1\u6570\u636e\u65e0\u5dee\u9519\u3001\u4e0d\u4e22\u5931\u3001\u4e0d\u91cd\u590d\u4e14\u6309\u5e8f\u5230\u8fbe\u3002\u9002\u7528\u4e8e\u6587\u4ef6\u4f20\u8f93\u3001\u7f51\u9875\u6d4f\u89c8\u7b49\u573a\u666f\u3002<\/li>\n<li>UDP&#xff1a;\u65e0\u8fde\u63a5\u7684\u3001\u4e0d\u53ef\u9760\u7684\u3001\u9762\u5411\u6570\u636e\u62a5\u7684\u4f20\u8f93\u5c42\u534f\u8bae\u3002\u53ea\u8d1f\u8d23\u628a\u6570\u636e\u53d1\u9001\u51fa\u53bb&#xff0c;\u4e0d\u4fdd\u8bc1\u5230\u8fbe&#xff0c;\u4e5f\u4e0d\u4fdd\u8bc1\u987a\u5e8f\u3002\u5f00\u9500\u6781\u5c0f&#xff0c;\u4f20\u8f93\u901f\u5ea6\u5feb&#xff0c;\u9002\u7528\u4e8e\u89c6\u9891\u901a\u8bdd\u3001\u6e38\u620f\u3001DNS \u67e5\u8be2\u7b49\u5b9e\u65f6\u6027\u573a\u666f\u3002<\/li>\n<\/ul>\n<p>\u5b8c<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\/* MD \/ \u5bcc\u6587\u672c\u4e2d\u7684 .toc\uff08\u542b\u535a\u5ba2\u56ed\u642c\u5bb6\u7b49\u5d4c\u5957\u7ed3\u6784\uff09\uff1b.toc-box \u5728\u4fa7\u680f\uff0c\u4e0d\u53d7\u5f71\u54cd *\/#content_views .toc,\/* \u7f16\u8f91\u5668\u5e38\u5728\u76ee\u5f55\u524d\u540e\u63d2\u5165\u7a7a p\uff08:empty \u4ecd\u5360 20px\uff09\uff0c\u4e00\u5e76\u53bb\u6389\u907f\u514d\u9876\u7a7a\u9699 *\/#content_views.markdown_views &gt; p:empty:has(+ .toc),#content_views.markdown_views &gt; .toc + p:empty,\/* \u5bcc\u6587\u672c\u65e7\u7248\u76ee\u5f55\u6807\u8bb0 *\/#content<\/p>\n","protected":false},"author":2,"featured_media":124029,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,58,205,78],"topic":[],"class_list":["post-124030","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-c","tag-linux","tag-tcp-ip","tag-78"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Liunx\u7f51\u7edc\u7f16\u7a0b\u5957\u63a5\u5b57\uff1aTCP - \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\/124030.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Liunx\u7f51\u7edc\u7f16\u7a0b\u5957\u63a5\u5b57\uff1aTCP - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\/* MD \/ \u5bcc\u6587\u672c\u4e2d\u7684 .toc\uff08\u542b\u535a\u5ba2\u56ed\u642c\u5bb6\u7b49\u5d4c\u5957\u7ed3\u6784\uff09\uff1b.toc-box \u5728\u4fa7\u680f\uff0c\u4e0d\u53d7\u5f71\u54cd *\/#content_views .toc,\/* \u7f16\u8f91\u5668\u5e38\u5728\u76ee\u5f55\u524d\u540e\u63d2\u5165\u7a7a p\uff08:empty \u4ecd\u5360 20px\uff09\uff0c\u4e00\u5e76\u53bb\u6389\u907f\u514d\u9876\u7a7a\u9699 *\/#content_views.markdown_views &gt; p:empty:has(+ .toc),#content_views.markdown_views &gt; .toc + p:empty,\/* \u5bcc\u6587\u672c\u65e7\u7248\u76ee\u5f55\u6807\u8bb0 *\/#content\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/124030.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-11-08T12:09:11+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/11\/20261108120908-6af0666468237.png\" \/>\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=\"10 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/124030.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/124030.html\",\"name\":\"Liunx\u7f51\u7edc\u7f16\u7a0b\u5957\u63a5\u5b57\uff1aTCP - 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