{"id":30148,"date":"2024-03-18T23:37:54","date_gmt":"2024-03-18T14:37:54","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/setsockopt%e9%96%a2%e6%95%b0%e3%81%ae%e6%a9%9f%e8%83%bd%e3%81%a8%e5%bc%95%e6%95%b0%e3%81%ae%e8%a7%a3%e8%aa%ac\/"},"modified":"2024-03-22T22:40:37","modified_gmt":"2024-03-22T13:40:37","slug":"setsockopt%e9%96%a2%e6%95%b0%e3%81%ae%e6%a9%9f%e8%83%bd%e3%81%a8%e5%bc%95%e6%95%b0%e3%81%ae%e8%a7%a3%e8%aa%ac","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/setsockopt%e9%96%a2%e6%95%b0%e3%81%ae%e6%a9%9f%e8%83%bd%e3%81%a8%e5%bc%95%e6%95%b0%e3%81%ae%e8%a7%a3%e8%aa%ac\/","title":{"rendered":"setsockopt\u95a2\u6570\u306e\u6a5f\u80fd\u3068\u5f15\u6570\u306e\u89e3\u8aac"},"content":{"rendered":"<p>setsockopt\u95a2\u6570\u306f\u3001\u30bd\u30b1\u30c3\u30c8\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3059\u308b\u95a2\u6570\u3067\u3059\u3002\u30bd\u30b1\u30c3\u30c8\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306f\u3001\u30bd\u30b1\u30c3\u30c8\u306e\u6319\u52d5\u3092\u5236\u5fa1\u3059\u308b\u305f\u3081\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u3042\u308a\u3001setsockopt\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3053\u308c\u3089\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>setsockopt\u95a2\u6570\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n<ol>\n<li>sockfd: \u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3057\u305f\u3044\u30bd\u30b1\u30c3\u30c8\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u3092\u8868\u3059\u6574\u6570\u3002<\/li>\n<li>\u30ec\u30d9\u30eb\uff1a\u9078\u629e\u80a2\u306e\u968e\u5c64\u3092\u793a\u3059\u6574\u6570\u3002\u4e00\u822c\u7684\u306a\u30ec\u30d9\u30eb\u306b\u306fSOL_SOCKET\u3084IPPROTO_TCP\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li>optname\uff1a\u8a2d\u5b9a\u3059\u308b\u30aa\u30d7\u30b7\u30e7\u30f3\u540d\u3092\u8868\u3059\u6574\u6570\u3002<\/li>\n<li>optval\uff1a\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u306e\u30d0\u30c3\u30d5\u30a1\u3092\u6307\u3059\u30dd\u30a4\u30f3\u30bf\u3002<\/li>\n<li>optlen\u306f\u3001optval\u30d0\u30c3\u30d5\u30a1\u306e\u30b5\u30a4\u30ba\u3092\u8868\u3059\u6574\u6570\u3067\u3059\u3002<\/li>\n<\/ol>\n<p>setsockopt\u95a2\u6570\u306e\u623b\u308a\u5024\u306f\u3001\u95a2\u6570\u306e\u5b9f\u884c\u7d50\u679c\u3092\u8868\u3059\u6574\u6570\u3067\u3059\u3002\u95a2\u6570\u304c\u6210\u529f\u3057\u305f\u5834\u5408\u306f\u30010\u3092\u8fd4\u3057\u3001\u305d\u3046\u3067\u306a\u3044\u5834\u5408\u306f-1\u3092\u8fd4\u3057\u3066errno\u3092\u8a2d\u5b9a\u3057\u3066\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<p>\u4e00\u822c\u7684\u306a\u9078\u629e\u80a2\u306e\u540d\u524d\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n<ol>\n<li>SO_REUSEADDR\uff1a\u30bd\u30b1\u30c3\u30c8\u304c\u30ed\u30fc\u30ab\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u518d\u5229\u7528\u3059\u308b\u3053\u3068\u3092\u8a31\u53ef\u3057\u307e\u3059\u3002<\/li>\n<li>SO_KEEPALIVE: \u4fdd\u6301\u6d3b\u52d5\u63a5\u7d9a\u6a5f\u80fd\u3092\u30aa\u30f3\u307e\u305f\u306f\u30aa\u30d5\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/li>\n<li>SO_RCVBUF\u3068SO_SNDBUF\uff1a\u53d7\u4fe1\u30d0\u30c3\u30d5\u30a1\u3068\u9001\u4fe1\u30d0\u30c3\u30d5\u30a1\u306e\u30b5\u30a4\u30ba\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/li>\n<li>TCP_NODELAY\u306f\u3001Nagle\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u7121\u52b9\u307e\u305f\u306f\u6709\u52b9\u306b\u3057\u3001\u30c7\u30fc\u30bf\u30d1\u30b1\u30c3\u30c8\u306e\u9045\u5ef6\u9001\u4fe1\u3092\u5236\u5fa1\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/li>\n<\/ol>\n<p>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u7247\u306f\u3001setsockopt\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3001SO_REUSEADDR\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u6709\u52b9\u306b\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-type\">int<\/span> sockfd = socket(AF_INET, SOCK_STREAM, <span class=\"hljs-number\">0<\/span>);\r\n<span class=\"hljs-keyword\">if<\/span> (sockfd == <span class=\"hljs-number\">-1<\/span>) {\r\n    perror(<span class=\"hljs-string\">\"socket\"<\/span>);\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">-1<\/span>;\r\n}\r\n\r\n<span class=\"hljs-type\">int<\/span> reuse = <span class=\"hljs-number\">1<\/span>;\r\n<span class=\"hljs-type\">int<\/span> ret = setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &amp;reuse, <span class=\"hljs-keyword\">sizeof<\/span>(reuse));\r\n<span class=\"hljs-keyword\">if<\/span> (ret == <span class=\"hljs-number\">-1<\/span>) {\r\n    perror(<span class=\"hljs-string\">\"setsockopt\"<\/span>);\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">-1<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u306f\u3001\u307e\u305a\u30bd\u30b1\u30c3\u30c8\u3092\u4f5c\u6210\u3057\u3001\u6b21\u306bsetsockopt\u95a2\u6570\u3092\u4f7f\u3063\u3066SO_REUSEADDR\u30aa\u30d7\u30b7\u30e7\u30f3\u30921\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30bd\u30b1\u30c3\u30c8\u304c\u30ed\u30fc\u30ab\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u518d\u5229\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u8a2d\u5b9a\u304c\u6210\u529f\u3057\u305f\u5834\u5408\u306b\u306f\u3001\u305d\u306e\u5f8c\u306e\u64cd\u4f5c\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n<p>\u8981\u70b9\u306f\u3001setsockopt\u95a2\u6570\u306f\u30bd\u30b1\u30c3\u30c8\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u306e\u95a2\u6570\u3067\u3042\u308a\u3001\u7570\u306a\u308b\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u30bd\u30b1\u30c3\u30c8\u306e\u52d5\u4f5c\u3092\u5236\u5fa1\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>setsockopt\u95a2\u6570\u306f\u3001\u30bd\u30b1\u30c3\u30c8\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3059\u308b\u95a2\u6570\u3067\u3059\u3002\u30bd\u30b1\u30c3\u30c8\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306f\u3001\u30bd\u30b1\u30c3\u30c8\u306e\u6319\u52d5\u3092\u5236\u5fa1\u3059\u308b\u305f\u3081\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u3042\u308a\u3001setsockopt\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3053\u308c\u3089\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002  [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-30148","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"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>setsockopt\u95a2\u6570\u306e\u6a5f\u80fd\u3068\u5f15\u6570\u306e\u89e3\u8aac - Blog - Silicon Cloud<\/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.silicloud.com\/ja\/blog\/setsockopt\u95a2\u6570\u306e\u6a5f\u80fd\u3068\u5f15\u6570\u306e\u89e3\u8aac\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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