{"id":77087,"date":"2024-03-20T17:59:32","date_gmt":"2024-03-20T08:59:32","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/c%e8%a8%80%e8%aa%9e%e3%81%a7setsockopt%e9%96%a2%e6%95%b0%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e4%bd%bf%e3%81%84%e3%81%be%e3%81%99%e3%81%8b%ef%bc%9f\/"},"modified":"2025-08-11T19:48:12","modified_gmt":"2025-08-11T10:48:12","slug":"c%e8%a8%80%e8%aa%9e%e3%81%a7setsockopt%e9%96%a2%e6%95%b0%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e4%bd%bf%e3%81%84%e3%81%be%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/c%e8%a8%80%e8%aa%9e%e3%81%a7setsockopt%e9%96%a2%e6%95%b0%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e4%bd%bf%e3%81%84%e3%81%be%e3%81%99%e3%81%8b%ef%bc%9f\/","title":{"rendered":"C\u8a00\u8a9e\u3067setsockopt()\u95a2\u6570\u306f\u3069\u306e\u3088\u3046\u306b\u4f7f\u3044\u307e\u3059\u304b\uff1f"},"content":{"rendered":"

setsockopt() \u95a2\u6570\u306f\u30bd\u30b1\u30c3\u30c8\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u3001\u30bd\u30b1\u30c3\u30c8\u306e\u52d5\u4f5c\u3084\u7279\u6027\u3092\u5236\u5fa1\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u95a2\u6570\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n

int<\/span> setsockopt<\/span>(int<\/span> sockfd, int<\/span> level, int<\/span> option_name, const<\/span> void<\/span> *option_value, socklen_t<\/span> option_len)<\/span>;\r\n<\/code><\/pre>\n
\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u306e\u8aac\u660e\uff1a<\/p>\n
    \n
  1. \u30bd\u30b1\u30c3\u30c8\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\uff1a\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3059\u308b\u5bfe\u8c61\u306e\u30bd\u30b1\u30c3\u30c8\u8a18\u8ff0\u5b50<\/li>\n
  2. \u30ec\u30d9\u30eb: \u30d7\u30ed\u30c8\u30b3\u30eb\u968e\u5c64\u4e0a\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u5834\u6240\u3002\u4e00\u822c\u7684\u306a\u3082\u306e\u306b\u306f\u3001SOL_SOCKET\u3001IPPROTO_TCP\u3001IPPROTO_IP \u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n
  3. \u30cd\u30a4\u30c6\u30a3\u30d6\u306a\u65e5\u672c\u8a9e\u306b\u30d1\u30e9\u30d5\u30ec\u30fc\u30ba\u3057\u307e\u3059\u30021\u3064\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u307f\u304c\u5fc5\u8981\u3067\u3059\u3002\u30aa\u30d7\u30b7\u30e7\u30f3\u540d\uff1aSO_REUSEADDR\u3001SO_KEEPALIVE \u306a\u3069\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u540d\u524d\u3002<\/li>\n
  4. \u30aa\u30d7\u30b7\u30e7\u30f3\u5024\u306e\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u30d0\u30c3\u30d5\u30a1\u306e\u30a2\u30c9\u30ec\u30b9\u3002<\/li>\n
  5. \u30aa\u30d7\u30b7\u30e7\u30f3\u9577: \u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u5024\u306e\u9577\u3055<\/li>\n<\/ol>\n
    \u4ee5\u4e0b\u306f\u3001setsockopt() \u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u8a2d\u5b9a\u3067\u304d\u308b\u4e00\u822c\u7684\u306b\u4f7f\u7528\u3055\u308c\u308b\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u4e00\u90e8\u3067\u3059\u3002<\/p>\n
      \n
    1. SO_REUSEADDR\uff1a\u30ed\u30fc\u30ab\u30eb\u30a2\u30c9\u30ec\u30b9\u3068\u30dd\u30fc\u30c8\u306e\u518d\u5229\u7528\u3092\u8a31\u53ef\u3057\u307e\u3059\u3002<\/li>\n
    2. SO_KEEPALIVE: TCP \u63a5\u7d9a\u306e\u30ad\u30fc\u30d7\u30a2\u30e9\u30a4\u30d6\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u6709\u52b9\u306b\u3057\u307e\u3059\u3002<\/li>\n
    3. SO_RCVBUF\u3068SO_SNDBUF: \u53d7\u4fe1\u30d0\u30c3\u30d5\u30a1\u3068\u9001\u4fe1\u30d0\u30c3\u30d5\u30a1\u306e\u30b5\u30a4\u30ba\u3092\u8a2d\u5b9a\u3059\u308b\u3002<\/li>\n
    4. TCP_NODELAY\uff1a\u30cd\u30b0\u30eb\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u7121\u52b9\u5316\u3057\u3001\u30d1\u30b1\u30c3\u30c8\u306e\u9045\u5ef6\u9001\u4fe1\u304c\u7121\u52b9\u5316\u3055\u308c\u307e\u3059\u3002<\/li>\n
    5. IPPROTO_IP\u3001IP_ADD_MEMBERSHIP\u3001IP_DROP_MEMBERSHIP:\u30de\u30eb\u30c1\u30ad\u30e3\u30b9\u30c8\u95a2\u9023\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n
      \u4f8b\u306e\u30b3\u30fc\u30c9\u306f\u30cd\u30a4\u30c6\u30a3\u30d6\u3067\u306f\u3042\u308a\u307e\u305b\u3002<\/p>\n
      int<\/span> sockfd;\r\nint<\/span> reuse = 1<\/span>;\r\n\r\n\/\/ \u521b\u5efa\u5957\u63a5\u5b57\u548c\u5176\u4ed6\u521d\u59cb\u5316\u64cd\u4f5c<\/span>\r\n\r\n\/\/ \u8bbe\u7f6eSO_REUSEADDR\u9009\u9879\uff0c\u5141\u8bb8\u91cd\u7528\u672c\u5730\u5730\u5740\u548c\u7aef\u53e3<\/span>\r\nif<\/span> (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof<\/span>(reuse)) == -1<\/span>) {\r\n    perror(\"setsockopt\"<\/span>);\r\n    exit<\/span>(1<\/span>);\r\n}\r\n\r\n\/\/ \u8bbe\u7f6eTCP_NODELAY\u9009\u9879\uff0c\u7981\u7528Nagle\u7b97\u6cd5<\/span>\r\nint<\/span> nodelay = 1<\/span>;\r\nif<\/span> (setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY, &nodelay, sizeof<\/span>(nodelay)) == -1<\/span>) {\r\n    perror(\"setsockopt\"<\/span>);\r\n    exit<\/span>(1<\/span>);\r\n}\r\n\r\n\/\/ \u5176\u4ed6\u64cd\u4f5c<\/span>\r\n<\/code><\/pre>\n
      \u4e0a\u8a18\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u3001\u307e\u305aSO_REUSEADDR\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u8a2d\u5b9a\u3092\u884c\u3044\u3001\u30ed\u30fc\u30ab\u30eb\u30a2\u30c9\u30ec\u30b9\u3084\u30dd\u30fc\u30c8\u306e\u518d\u5229\u7528\u3092\u8a31\u53ef\u3057\u307e\u3059\u3002\u6b21\u306b\u3001TCP_NODELAY\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3057\u3066\u3001\u30c7\u30fc\u30bf\u30d1\u30b1\u30c3\u30c8\u306e\u9045\u5ef6\u9001\u4fe1\u3092\u7121\u52b9\u306b\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
      setsockopt() \u95a2\u6570\u306f\u30bd\u30b1\u30c3\u30c8\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u3001\u30bd\u30b1\u30c3\u30c8\u306e\u52d5\u4f5c\u3084\u7279\u6027\u3092\u5236\u5fa1\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u95a2\u6570\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002 int setsockopt(int sockfd, int le […]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-77087","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"\nC\u8a00\u8a9e\u3067setsockopt()\u95a2\u6570\u306f\u3069\u306e\u3088\u3046\u306b\u4f7f\u3044\u307e\u3059\u304b\uff1f - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"C\u8a00\u8a9e\u3067setsockopt()\u95a2\u6570\u306f\u3069\u306e\u3088\u3046\u306b\u4f7f\u3044\u307e\u3059\u304b\uff1f\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\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\/c\u8a00\u8a9e\u3067setsockopt\u95a2\u6570\u306f\u3069\u306e\u3088\u3046\u306b\u4f7f\u3044\u307e\u3059\u304b\uff1f\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C\u8a00\u8a9e\u3067setsockopt()\u95a2\u6570\u306f\u3069\u306e\u3088\u3046\u306b\u4f7f\u3044\u307e\u3059\u304b\uff1f\" \/>\n<meta property=\"og:description\" content=\"C\u8a00\u8a9e\u3067setsockopt()\u95a2\u6570\u306f\u3069\u306e\u3088\u3046\u306b\u4f7f\u3044\u307e\u3059\u304b\uff1f\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/c\u8a00\u8a9e\u3067setsockopt\u95a2\u6570\u306f\u3069\u306e\u3088\u3046\u306b\u4f7f\u3044\u307e\u3059\u304b\uff1f\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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