{"id":6085,"date":"2024-03-14T16:56:59","date_gmt":"2024-03-14T07:56:59","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/c%e3%81%a7tcp%e9%80%9a%e4%bf%a1%e3%82%92%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e4%bd%bf%e7%94%a8%e3%81%99%e3%82%8b%e3%81%8b%e3%80%82\/"},"modified":"2025-08-03T07:09:27","modified_gmt":"2025-08-02T22:09:27","slug":"c%e3%81%a7tcp%e9%80%9a%e4%bf%a1%e3%82%92%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e4%bd%bf%e7%94%a8%e3%81%99%e3%82%8b%e3%81%8b%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/c%e3%81%a7tcp%e9%80%9a%e4%bf%a1%e3%82%92%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e4%bd%bf%e7%94%a8%e3%81%99%e3%82%8b%e3%81%8b%e3%80%82\/","title":{"rendered":"C++ TCP\u901a\u4fe1\u306e\u57fa\u672c\u3068\u5b9f\u88c5\u65b9\u6cd5\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u4ed8\u304d\u3011"},"content":{"rendered":"<p>C++\u3067TCP\u901a\u4fe1\u3092\u884c\u3046\u5834\u5408\u3001\u901a\u5e38\u306fSocket\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001TCP\u63a5\u7d9a\u3092\u78ba\u7acb\u3057\u3001\u30c7\u30fc\u30bf\u3092\u9001\u53d7\u4fe1\u3059\u308b\u305f\u3081\u306e\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;iostream&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;sys\/socket.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;arpa\/inet.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;unistd.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;string.h&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">int<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">()<\/span> <\/span>{\r\n    <span class=\"hljs-comment\">\/\/ \u521b\u5efasocket<\/span>\r\n    <span class=\"hljs-type\">int<\/span> client_socket = <span class=\"hljs-built_in\">socket<\/span>(AF_INET, SOCK_STREAM, <span class=\"hljs-number\">0<\/span>);\r\n    \r\n    <span class=\"hljs-keyword\">if<\/span> (client_socket &lt; <span class=\"hljs-number\">0<\/span>) {\r\n        std::cerr &lt;&lt; <span class=\"hljs-string\">\"Error creating socket\"<\/span> &lt;&lt; std::endl;\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">1<\/span>;\r\n    }\r\n    \r\n    <span class=\"hljs-comment\">\/\/ \u8bbe\u7f6e\u670d\u52a1\u5668\u5730\u5740\u548c\u7aef\u53e3<\/span>\r\n    <span class=\"hljs-keyword\">struct<\/span> <span class=\"hljs-title class_\">sockaddr_in<\/span> server_address;\r\n    server_address.sin_family = AF_INET;\r\n    server_address.sin_port = <span class=\"hljs-built_in\">htons<\/span>(<span class=\"hljs-number\">12345<\/span>);\r\n    server_address.sin_addr.s_addr = <span class=\"hljs-built_in\">inet_addr<\/span>(<span class=\"hljs-string\">\"127.0.0.1\"<\/span>);\r\n    \r\n    <span class=\"hljs-comment\">\/\/ \u8fde\u63a5\u5230\u670d\u52a1\u5668<\/span>\r\n    <span class=\"hljs-keyword\">if<\/span> (<span class=\"hljs-built_in\">connect<\/span>(client_socket, (<span class=\"hljs-keyword\">struct<\/span> sockaddr *)&amp;server_address, <span class=\"hljs-built_in\">sizeof<\/span>(server_address)) &lt; <span class=\"hljs-number\">0<\/span>) {\r\n        std::cerr &lt;&lt; <span class=\"hljs-string\">\"Error connecting to server\"<\/span> &lt;&lt; std::endl;\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">1<\/span>;\r\n    }\r\n    \r\n    <span class=\"hljs-comment\">\/\/ \u53d1\u9001\u6570\u636e<\/span>\r\n    <span class=\"hljs-type\">const<\/span> <span class=\"hljs-type\">char<\/span> *message = <span class=\"hljs-string\">\"Hello from client!\"<\/span>;\r\n    <span class=\"hljs-keyword\">if<\/span> (<span class=\"hljs-built_in\">send<\/span>(client_socket, message, <span class=\"hljs-built_in\">strlen<\/span>(message), <span class=\"hljs-number\">0<\/span>) &lt; <span class=\"hljs-number\">0<\/span>) {\r\n        std::cerr &lt;&lt; <span class=\"hljs-string\">\"Error sending message\"<\/span> &lt;&lt; std::endl;\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">1<\/span>;\r\n    }\r\n    \r\n    <span class=\"hljs-comment\">\/\/ \u63a5\u6536\u6570\u636e<\/span>\r\n    <span class=\"hljs-type\">char<\/span> buffer[<span class=\"hljs-number\">1024<\/span>] = {<span class=\"hljs-number\">0<\/span>};\r\n    <span class=\"hljs-keyword\">if<\/span> (<span class=\"hljs-built_in\">recv<\/span>(client_socket, buffer, <span class=\"hljs-number\">1024<\/span>, <span class=\"hljs-number\">0<\/span>) &lt; <span class=\"hljs-number\">0<\/span>) {\r\n        std::cerr &lt;&lt; <span class=\"hljs-string\">\"Error receiving message\"<\/span> &lt;&lt; std::endl;\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">1<\/span>;\r\n    }\r\n    \r\n    std::cout &lt;&lt; <span class=\"hljs-string\">\"Server response: \"<\/span> &lt;&lt; buffer &lt;&lt; std::endl;\r\n    \r\n    <span class=\"hljs-comment\">\/\/ \u5173\u95edsocket<\/span>\r\n    <span class=\"hljs-built_in\">close<\/span>(client_socket);\r\n    \r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u307e\u305a\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30bd\u30b1\u30c3\u30c8\u3092\u4f5c\u6210\u3057\u3001\u6b21\u306b\u30b5\u30fc\u30d0\u30fc\u306e\u30a2\u30c9\u30ec\u30b9\u3068\u30dd\u30fc\u30c8\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001connect\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30b5\u30fc\u30d0\u30fc\u306b\u63a5\u7d9a\u3057\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002\u6700\u5f8c\u306b\u3001\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u306e\u5fdc\u7b54\u3092\u53d7\u3051\u53d6\u308a\u3001\u30bd\u30b1\u30c3\u30c8\u3092\u9589\u3058\u307e\u3059\u3002<\/p>\n<p>\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3001\u3053\u308c\u306f\u5358\u306a\u308b\u7c21\u5358\u306a\u4f8b\u3067\u3059\u304c\u3001\u5b9f\u969b\u306e\u72b6\u6cc1\u306f\u3088\u308a\u8907\u96d1\u3067\u3042\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30a8\u30e9\u30fc\u3084\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3001\u30d1\u30b1\u30c3\u30c8\u306e\u9023\u7d50\u306a\u3069\u3082\u8003\u616e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002Boost.Asio\u306a\u3069\u306e\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001TCP\u901a\u4fe1\u306e\u5b9f\u88c5\u3092\u7c21\u7565\u5316\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C++\u3067TCP\u901a\u4fe1\u3092\u884c\u3046\u5834\u5408\u3001\u901a\u5e38\u306fSocket\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001TCP\u63a5\u7d9a\u3092\u78ba\u7acb\u3057\u3001\u30c7\u30fc\u30bf\u3092\u9001\u53d7\u4fe1\u3059\u308b\u305f\u3081\u306e\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\u3002 #include &lt;iostream&gt; #inclu [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[85,1620,1612,1611],"class_list":["post-6085","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-c","tag-tcp","tag-1612","tag-1611"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C++ TCP\u901a\u4fe1\u306e\u57fa\u672c\u3068\u5b9f\u88c5\u65b9\u6cd5\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u4ed8\u304d\u3011 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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