{"id":75844,"date":"2024-03-20T16:17:24","date_gmt":"2024-03-20T07:17:24","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/c%e8%a8%80%e8%aa%9e%e3%81%ab%e3%82%88%e3%82%8b%e3%83%97%e3%83%83%e3%82%b7%e3%83%a5%e6%a9%9f%e8%83%bd%e3%81%ae%e5%ae%9f%e8%a3%85%e6%96%b9%e6%b3%95\/"},"modified":"2025-08-11T13:57:28","modified_gmt":"2025-08-11T04:57:28","slug":"c%e8%a8%80%e8%aa%9e%e3%81%ab%e3%82%88%e3%82%8b%e3%83%97%e3%83%83%e3%82%b7%e3%83%a5%e6%a9%9f%e8%83%bd%e3%81%ae%e5%ae%9f%e8%a3%85%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/c%e8%a8%80%e8%aa%9e%e3%81%ab%e3%82%88%e3%82%8b%e3%83%97%e3%83%83%e3%82%b7%e3%83%a5%e6%a9%9f%e8%83%bd%e3%81%ae%e5%ae%9f%e8%a3%85%e6%96%b9%e6%b3%95\/","title":{"rendered":"C\u8a00\u8a9e\u306b\u3088\u308b\u30d7\u30c3\u30b7\u30e5\u6a5f\u80fd\u306e\u5b9f\u88c5\u65b9\u6cd5"},"content":{"rendered":"<p>C\u8a00\u8a9e\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u95a2\u9023\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u5229\u7528\u3057\u3066\u958b\u767a\u3059\u308b\u3053\u3068\u3067\u3001\u30d7\u30c3\u30b7\u30e5\u901a\u77e5\u6a5f\u80fd\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001Linux\u306b\u304a\u3051\u308b\u30bd\u30b1\u30c3\u30c8\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u4f7f\u7528\u3057\u305f\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;stdio.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;stdlib.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<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;sys\/socket.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;netinet\/in.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\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">define<\/span> SERVER_PORT 8888<\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">define<\/span> MAX_CONNECTIONS 10<\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">define<\/span> MAX_BUFFER_SIZE 1024<\/span>\r\n\r\n<span class=\"hljs-comment\">\/\/ \u5904\u7406\u5ba2\u6237\u7aef\u8fde\u63a5\u8bf7\u6c42<\/span>\r\n<span class=\"hljs-type\">void<\/span> <span class=\"hljs-title function_\">handleClient<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">int<\/span> clientSocket)<\/span> {\r\n    <span class=\"hljs-type\">char<\/span> buffer[MAX_BUFFER_SIZE];\r\n    <span class=\"hljs-built_in\">memset<\/span>(buffer, <span class=\"hljs-number\">0<\/span>, <span class=\"hljs-keyword\">sizeof<\/span>(buffer));\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u63a5\u6536\u5ba2\u6237\u7aef\u6d88\u606f<\/span>\r\n    <span class=\"hljs-type\">int<\/span> bytesRead = recv(clientSocket, buffer, <span class=\"hljs-keyword\">sizeof<\/span>(buffer), <span class=\"hljs-number\">0<\/span>);\r\n    <span class=\"hljs-keyword\">if<\/span> (bytesRead &lt;= <span class=\"hljs-number\">0<\/span>) {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Failed to receive message from client.\\n\"<\/span>);\r\n        close(clientSocket);\r\n        <span class=\"hljs-keyword\">return<\/span>;\r\n    }\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u6253\u5370\u5ba2\u6237\u7aef\u6d88\u606f<\/span>\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Received message from client: %s\\n\"<\/span>, buffer);\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u5904\u7406\u6d88\u606f\uff0c\u8fd9\u91cc\u53ef\u4ee5\u6839\u636e\u9700\u6c42\u8fdb\u884c\u5177\u4f53\u7684\u5904\u7406\u903b\u8f91<\/span>\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u53d1\u9001\u54cd\u5e94\u7ed9\u5ba2\u6237\u7aef<\/span>\r\n    <span class=\"hljs-type\">char<\/span> response[] = <span class=\"hljs-string\">\"Message received!\"<\/span>;\r\n    <span class=\"hljs-keyword\">if<\/span> (send(clientSocket, response, <span class=\"hljs-keyword\">sizeof<\/span>(response), <span class=\"hljs-number\">0<\/span>) &lt;= <span class=\"hljs-number\">0<\/span>) {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Failed to send response to client.\\n\"<\/span>);\r\n    }\r\n\r\n    close(clientSocket);\r\n}\r\n\r\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">()<\/span> {\r\n    <span class=\"hljs-type\">int<\/span> serverSocket, clientSocket;\r\n    <span class=\"hljs-class\"><span class=\"hljs-keyword\">struct<\/span> <span class=\"hljs-title\">sockaddr_in<\/span> <span class=\"hljs-title\">serverAddr<\/span>, <span class=\"hljs-title\">clientAddr<\/span>;<\/span>\r\n    <span class=\"hljs-type\">socklen_t<\/span> clientAddrLen = <span class=\"hljs-keyword\">sizeof<\/span>(clientAddr);\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u521b\u5efa\u5957\u63a5\u5b57<\/span>\r\n    serverSocket = socket(AF_INET, SOCK_STREAM, <span class=\"hljs-number\">0<\/span>);\r\n    <span class=\"hljs-keyword\">if<\/span> (serverSocket == <span class=\"hljs-number\">-1<\/span>) {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Failed to create socket.\\n\"<\/span>);\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\u5730\u5740\u91cd\u7528<\/span>\r\n    <span class=\"hljs-type\">int<\/span> reuse = <span class=\"hljs-number\">1<\/span>;\r\n    <span class=\"hljs-keyword\">if<\/span> (setsockopt(serverSocket, SOL_SOCKET, SO_REUSEADDR, &amp;reuse, <span class=\"hljs-keyword\">sizeof<\/span>(reuse)) == <span class=\"hljs-number\">-1<\/span>) {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Failed to set socket options.\\n\"<\/span>);\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">-1<\/span>;\r\n    }\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u7ed1\u5b9a\u5730\u5740\u548c\u7aef\u53e3<\/span>\r\n    serverAddr.sin_family = AF_INET;\r\n    serverAddr.sin_port = htons(SERVER_PORT);\r\n    serverAddr.sin_addr.s_addr = INADDR_ANY;\r\n    <span class=\"hljs-keyword\">if<\/span> (bind(serverSocket, (<span class=\"hljs-keyword\">struct<\/span> sockaddr *)&amp;serverAddr, <span class=\"hljs-keyword\">sizeof<\/span>(serverAddr)) == <span class=\"hljs-number\">-1<\/span>) {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Failed to bind socket.\\n\"<\/span>);\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">-1<\/span>;\r\n    }\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u5f00\u59cb\u76d1\u542c\u8fde\u63a5<\/span>\r\n    <span class=\"hljs-keyword\">if<\/span> (listen(serverSocket, MAX_CONNECTIONS) == <span class=\"hljs-number\">-1<\/span>) {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Failed to listen on socket.\\n\"<\/span>);\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">-1<\/span>;\r\n    }\r\n\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Server started, listening on port %d.\\n\"<\/span>, SERVER_PORT);\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u63a5\u53d7\u5ba2\u6237\u7aef\u8fde\u63a5\u8bf7\u6c42\u5e76\u5904\u7406<\/span>\r\n    <span class=\"hljs-keyword\">while<\/span> (<span class=\"hljs-number\">1<\/span>) {\r\n        clientSocket = accept(serverSocket, (<span class=\"hljs-keyword\">struct<\/span> sockaddr *)&amp;clientAddr, &amp;clientAddrLen);\r\n        <span class=\"hljs-keyword\">if<\/span> (clientSocket == <span class=\"hljs-number\">-1<\/span>) {\r\n            <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Failed to accept client connection.\\n\"<\/span>);\r\n            <span class=\"hljs-keyword\">continue<\/span>;\r\n        }\r\n\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Accepted client connection from %s:%d.\\n\"<\/span>, inet_ntoa(clientAddr.sin_addr), ntohs(clientAddr.sin_port));\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u5904\u7406\u5ba2\u6237\u7aef\u8bf7\u6c42<\/span>\r\n        handleClient(clientSocket);\r\n    }\r\n\r\n    close(serverSocket);\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u306f8888\u756a\u30dd\u30fc\u30c8\u3092\u76e3\u8996\u3057\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u63a5\u7d9a\u3059\u308b\u3068\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u9001\u3089\u308c\u3066\u304d\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u53d7\u3051\u53d6\u308a\u3001\u305d\u308c\u3092\u8868\u793a\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u8981\u6c42\u306b\u5fdc\u3058\u3066\u51e6\u7406\u3092\u884c\u3044\u3001\u6700\u5f8c\u306b\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/p>\n<p>\u5b9f\u904b\u7528\u3067\u306f\u3001\u4f8b\u3048\u3070SSL\/TLS\u306b\u3088\u308b\u6697\u53f7\u5316\u901a\u4fe1\u3084\u3001\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u4e26\u5217\u51e6\u7406\u3078\u306e\u5bfe\u5fdc\u306a\u3069\u3001\u3055\u3089\u306a\u308b\u5b89\u5168\u6027\u3084\u5b89\u5b9a\u6027\u306e\u51e6\u7406\u304c\u5fc5\u8981\u306b\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3042\u304f\u307e\u3067\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u4f8b\u3067\u3042\u308a\u3001\u5b9f\u969b\u306e\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u8abf\u6574\u3084\u62e1\u5f35\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\u8a00\u8a9e\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u95a2\u9023\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u5229\u7528\u3057\u3066\u958b\u767a\u3059\u308b\u3053\u3068\u3067\u3001\u30d7\u30c3\u30b7\u30e5\u901a\u77e5\u6a5f\u80fd\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001Linux\u306b\u304a\u3051\u308b\u30bd\u30b1\u30c3\u30c8\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u4f7f\u7528\u3057\u305f\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u793a\u3057\u307e\u3059\u3002 #include &#038; [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-75844","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"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\u8a00\u8a9e\u306b\u3088\u308b\u30d7\u30c3\u30b7\u30e5\u6a5f\u80fd\u306e\u5b9f\u88c5\u65b9\u6cd5 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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