{"id":116097,"date":"2024-03-23T05:18:16","date_gmt":"2024-03-22T20:18:16","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/linux%e3%81%a7getsockopt%e9%96%a2%e6%95%b0%e3%81%a8setsockopt%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9\/"},"modified":"2024-04-05T10:05:26","modified_gmt":"2024-04-05T01:05:26","slug":"linux%e3%81%a7getsockopt%e9%96%a2%e6%95%b0%e3%81%a8setsockopt%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/linux%e3%81%a7getsockopt%e9%96%a2%e6%95%b0%e3%81%a8setsockopt%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9\/","title":{"rendered":"Linux\u3067getsockopt\u95a2\u6570\u3068setsockopt\u95a2\u6570\u306e\u4f7f\u3044\u65b9"},"content":{"rendered":"<p>getsockopt\u95a2\u6570\u306f\u30bd\u30b1\u30c3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u73fe\u5728\u306e\u5024\u3092\u53d6\u5f97\u3059\u308b\u306e\u306b\u5bfe\u3057\u3001setsockopt\u95a2\u6570\u306f\u30bd\u30b1\u30c3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u4f7f\u3044\u65b9\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<p>getsockopt\u95a2\u6570\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\uff1aint getsockopt(int sockfd, int level, int optname, void *optval, socklen_t *optlen);<\/p>\n<p>\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u89e3\u8aac\uff1a<\/p>\n<ol>\n<li>\u30bd\u30b1\u30c3\u30c8\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf: sockfd<\/li>\n<li>\u30ec\u30d9\u30eb\uff1a\u30d7\u30ed\u30c8\u30b3\u30eb\u5c64\u306e\u4e2d\u306e\u30aa\u30d7\u30b7\u30e7\u30f3<\/li>\n<li>\u30aa\u30d7\u30b7\u30e7\u30f3\u540d<\/li>\n<li>\u30aa\u30d7\u30b7\u30e7\u30f3\u5024\u3092\u683c\u7d0d\u3059\u308b\u305f\u3081\u306e\u30d0\u30c3\u30d5\u30a1<\/li>\n<li>optlen: \u5165\u529b\u6642\u306foptval\u30d0\u30c3\u30d5\u30a1\u30fc\u306e\u9577\u3055\u3001\u51fa\u529b\u6642\u306f\u5b9f\u969b\u306b\u53d6\u5f97\u3057\u305f\u30aa\u30d7\u30b7\u30e7\u30f3\u5024\u306e\u9577\u3055<\/li>\n<\/ol>\n<p>\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\uff1a<\/p>\n<pre class=\"post-pre\"><code><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;netinet\/tcp.h&gt;<\/span><\/span>\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> sockfd = socket(AF_INET, SOCK_STREAM, <span class=\"hljs-number\">0<\/span>);\r\n    <span class=\"hljs-type\">int<\/span> optval;\r\n    <span class=\"hljs-type\">socklen_t<\/span> optlen = <span class=\"hljs-keyword\">sizeof<\/span>(optval);\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u83b7\u53d6TCP_NODELAY\u9009\u9879\u7684\u5f53\u524d\u503c<\/span>\r\n    getsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY, &amp;optval, &amp;optlen);\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"TCP_NODELAY: %d\\n\"<\/span>, optval);\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u83b7\u53d6SO_RCVBUF\u9009\u9879\u7684\u5f53\u524d\u503c<\/span>\r\n    getsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, &amp;optval, &amp;optlen);\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"SO_RCVBUF: %d\\n\"<\/span>, optval);\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>setsockopt\u95a2\u6570\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\uff1aint setsockopt(int sockfd, int \u30ec\u30d9\u30eb, int optname, const void *optval, socklen_t optlen);<\/p>\n<p>\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u8aac\u660e\uff1a<\/p>\n<ol>\n<li>sockfd: \u30bd\u30b1\u30c3\u30c8\u8a18\u8ff0\u5b50<\/li>\n<li>\u30ec\u30d9\u30eb\u306f\u3001\u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u5c5e\u3059\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u5c64\u306e\u3053\u3068\u3067\u3059\u3002<\/li>\n<li>\u30aa\u30d7\u30b7\u30e7\u30f3\u540d:\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u540d\u524d<\/li>\n<li>optval\uff1a\u30aa\u30d7\u30b7\u30e7\u30f3\u5024\u306e\u5165\u3063\u305f\u30d0\u30c3\u30d5\u30a1\u3092\u6307\u3059<\/li>\n<li>\u30d0\u30c3\u30d5\u30a1\u30fc\u306e\u9577\u3055 optval<\/li>\n<\/ol>\n<p>\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9:<\/p>\n<pre class=\"post-pre\"><code><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;netinet\/tcp.h&gt;<\/span><\/span>\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> sockfd = socket(AF_INET, SOCK_STREAM, <span class=\"hljs-number\">0<\/span>);\r\n    <span class=\"hljs-type\">int<\/span> optval = <span class=\"hljs-number\">1<\/span>;\r\n    <span class=\"hljs-type\">socklen_t<\/span> optlen = <span class=\"hljs-keyword\">sizeof<\/span>(optval);\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u8bbe\u7f6eTCP_NODELAY\u9009\u9879\u4e3a1<\/span>\r\n    setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY, &amp;optval, optlen);\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u8bbe\u7f6eSO_RCVBUF\u9009\u9879\u4e3a8192<\/span>\r\n    optval = <span class=\"hljs-number\">8192<\/span>;\r\n    setsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, &amp;optval, optlen);\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\u308c\u3089\u306e\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u3001\u95a2\u9023\u3059\u308b\u30d8\u30c3\u30c0\u30fc\u30d5\u30a1\u30a4\u30eb(sys\/socket.h \u3084netinet\/in.h \u7b49) \u3092\u30a4\u30f3\u30af\u30eb\u30fc\u30c9\u3057\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u95a2\u9023\u3059\u308b\u30e9\u30a4\u30d6\u30e9\u30ea(\u4f8b: -lsocket \u30aa\u30d7\u30b7\u30e7\u30f3) \u306e\u30ea\u30f3\u30af\u3092\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>getsockopt\u95a2\u6570\u306f\u30bd\u30b1\u30c3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u73fe\u5728\u306e\u5024\u3092\u53d6\u5f97\u3059\u308b\u306e\u306b\u5bfe\u3057\u3001setsockopt\u95a2\u6570\u306f\u30bd\u30b1\u30c3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u4f7f\u3044\u65b9\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002 getsockopt\u95a2\u6570\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\uff1ain [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-116097","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site 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content=\"getsockopt\u95a2\u6570\u306f\u30bd\u30b1\u30c3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u73fe\u5728\u306e\u5024\u3092\u53d6\u5f97\u3059\u308b\u306e\u306b\u5bfe\u3057\u3001setsockopt\u95a2\u6570\u306f\u30bd\u30b1\u30c3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u4f7f\u3044\u65b9\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002 getsockopt\u95a2\u6570\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\uff1ain [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/linux\u3067getsockopt\u95a2\u6570\u3068setsockopt\u95a2\u6570\u306e\u4f7f\u3044\u65b9\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-22T20:18:16+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-05T01:05:26+00:00\" \/>\n<meta name=\"author\" content=\"\u84ee, \u7ffc\" \/>\n<meta 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