{"id":7231,"date":"2024-03-14T21:04:19","date_gmt":"2024-03-14T12:04:19","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/c%e3%81%a7udp%e5%8f%97%e4%bf%a1%e3%82%92%e7%b5%90%e5%90%88%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/"},"modified":"2025-08-03T13:27:53","modified_gmt":"2025-08-03T04:27:53","slug":"c%e3%81%a7udp%e5%8f%97%e4%bf%a1%e3%82%92%e7%b5%90%e5%90%88%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/c%e3%81%a7udp%e5%8f%97%e4%bf%a1%e3%82%92%e7%b5%90%e5%90%88%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/","title":{"rendered":"C++ UDP\u53d7\u4fe1\uff1a\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u7d50\u5408\u30c6\u30af\u30cb\u30c3\u30af"},"content":{"rendered":"<p>C++\u3067UDP\u53d7\u4fe1\u306e\u7d71\u5408\u3092\u5b9f\u73fe\u3059\u308b\u65b9\u6cd5\u306f\u4e00\u822c\u7684\u306b2\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u53d7\u4fe1\u3059\u308b<\/li>\n<\/ol>\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\/types.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<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;unistd.h&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">define<\/span> PORT 8888<\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">define<\/span> BUF_SIZE 1024<\/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-type\">int<\/span> sockfd;\r\n    <span class=\"hljs-keyword\">struct<\/span> <span class=\"hljs-title class_\">sockaddr_in<\/span> server_addr, client_addr;\r\n    <span class=\"hljs-type\">socklen_t<\/span> addr_len = <span class=\"hljs-built_in\">sizeof<\/span>(<span class=\"hljs-keyword\">struct<\/span> sockaddr_in);\r\n    <span class=\"hljs-type\">char<\/span> buffer[BUF_SIZE];\r\n\r\n    sockfd = <span class=\"hljs-built_in\">socket<\/span>(AF_INET, SOCK_DGRAM, <span class=\"hljs-number\">0<\/span>);\r\n\r\n    server_addr.sin_family = AF_INET;\r\n    server_addr.sin_port = <span class=\"hljs-built_in\">htons<\/span>(PORT);\r\n    server_addr.sin_addr.s_addr = <span class=\"hljs-built_in\">htonl<\/span>(INADDR_ANY);\r\n\r\n    <span class=\"hljs-built_in\">bind<\/span>(sockfd, (<span class=\"hljs-keyword\">struct<\/span> sockaddr*)&amp;server_addr, <span class=\"hljs-built_in\">sizeof<\/span>(<span class=\"hljs-keyword\">struct<\/span> sockaddr_in));\r\n\r\n    <span class=\"hljs-keyword\">while<\/span>(<span class=\"hljs-number\">1<\/span>) {\r\n        <span class=\"hljs-built_in\">recvfrom<\/span>(sockfd, buffer, BUF_SIZE, <span class=\"hljs-number\">0<\/span>, (<span class=\"hljs-keyword\">struct<\/span> sockaddr*)&amp;client_addr, &amp;addr_len);\r\n        <span class=\"hljs-comment\">\/\/ \u5728\u8fd9\u91cc\u8fdb\u884c\u6570\u636e\u5305\u7684\u5408\u5e76\u64cd\u4f5c<\/span>\r\n    }\r\n\r\n    <span class=\"hljs-built_in\">close<\/span>(sockfd);\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>boost::asio\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/li>\n<li>boost::asio\u3092\u4f7f\u7528\u3059\u308b<\/li>\n<\/ol>\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;boost\/asio.hpp&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">define<\/span> PORT 8888<\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">define<\/span> BUF_SIZE 1024<\/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    boost::asio::io_service io_service;\r\n    boost::asio::ip::<span class=\"hljs-function\">udp::socket <span class=\"hljs-title\">socket<\/span><span class=\"hljs-params\">(io_service, boost::asio::ip::udp::endpoint(boost::asio::ip::udp::v4(), PORT))<\/span><\/span>;\r\n    boost::asio::ip::udp::endpoint sender_endpoint;\r\n    <span class=\"hljs-type\">char<\/span> buffer[BUF_SIZE];\r\n\r\n    <span class=\"hljs-keyword\">while<\/span> (<span class=\"hljs-literal\">true<\/span>) {\r\n        <span class=\"hljs-type\">size_t<\/span> len = socket.<span class=\"hljs-built_in\">receive_from<\/span>(boost::asio::<span class=\"hljs-built_in\">buffer<\/span>(buffer), sender_endpoint);\r\n        <span class=\"hljs-comment\">\/\/ \u5728\u8fd9\u91cc\u8fdb\u884c\u6570\u636e\u5305\u7684\u5408\u5e76\u64cd\u4f5c<\/span>\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306fUDP\u53d7\u4fe1\u3092\u7d71\u5408\u3059\u308b\u305f\u3081\u306e2\u3064\u306e\u4e00\u822c\u7684\u306aC++\u5b9f\u88c5\u65b9\u6cd5\u3067\u3059\u304c\u3001\u5177\u4f53\u7684\u306b\u306f\u8981\u4ef6\u3084\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u74b0\u5883\u306b\u5fdc\u3058\u3066\u9078\u629e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C++\u3067UDP\u53d7\u4fe1\u306e\u7d71\u5408\u3092\u5b9f\u73fe\u3059\u308b\u65b9\u6cd5\u306f\u4e00\u822c\u7684\u306b2\u3064\u3042\u308a\u307e\u3059\u3002 \u53d7\u4fe1\u3059\u308b #include &lt;iostream&gt; #include &lt;sys\/types.h&gt; #include &lt;sys\/s [&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":[85,2575,822,1611,2585],"class_list":["post-7231","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-c","tag-udp","tag-822","tag-1611","tag-2585"],"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++ UDP\u53d7\u4fe1\uff1a\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u7d50\u5408\u30c6\u30af\u30cb\u30c3\u30af - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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