{"id":122,"date":"2015-05-04T12:09:01","date_gmt":"2015-05-04T12:09:01","guid":{"rendered":""},"modified":"2015-05-04T12:09:01","modified_gmt":"2015-05-04T12:09:01","slug":"","status":"publish","type":"post","link":"http:\/\/weizn.net\/?p=122","title":{"rendered":"socket\u8bbe\u7f6e\u8d85\u65f6"},"content":{"rendered":"

linux\u548cwindows\u4e0b\u7528setsockopt\u8bbe\u7f6eSO_SNDTIMEO,SO_RCVTIMEO\u7684\u53c2\u6570\u7684\u4e00\u70b9\u533a\u522b  <\/p>\n

UDP\u7684socket\u5728\u67d0\u4e9b\u60c5\u51b5\uff1a\u5982\u5bf9\u65b9\u5173\u95ed\u65f6\uff0c\u672c\u5730\u53ef\u80fdsendto\u4e0d\u51fa\u53bb\u6570\u636e\uff0c\u7136\u540erecvfrom\u5c31\u4f1a\u88ab\u963b\u585e\uff0c\u8fd9\u65f6\u5c31\u9700\u8981\u8bbe\u7f6e \u8fd9\u4e24\u4e2a\u53c2\u6570\u7684\u503c\u63d0\u9ad8\u7a0b\u5e8f\u8d28\u91cf\u3002<\/p>\n

linux:<\/p>\n

    struct timeval timeout={3,0};\/\/3s
\n    int ret=setsockopt(sock_fd,SOL_SOCKET,SO_SNDTIMEO,(const char*)&timeout,sizeof(timeout));
\n    int ret=setsockopt(sock_fd,SOL_SOCKET,SO_RCVTIMEO,(const char*)&timeout,sizeof(timeout));<\/p>\n

    \u5982\u679cret==0 \u5219\u4e3a\u6210\u529f,-1\u4e3a\u5931\u8d25,\u8fd9\u65f6\u53ef\u4ee5\u67e5\u770berrno\u6765\u5224\u65ad\u5931\u8d25\u539f\u56e0
\n    int recvd=recv(sock_fd,buf,1024,0);
\n    if(recvd==-1&&errno==EAGAIN)
\n   {
\n        printf(“timeout\\n”);
\n   }<\/p>\n

<\/p>\n

\n\twindows:\n<\/p>\n

\n\t\n<\/p>\n

\n\t    int timeout = 3000; \/\/3s\n<\/p>\n

\n\t    int ret=setsockopt(sock_fd,SOL_SOCKET,SO_SNDTIMEO,&timeout,sizeof(timeout));\n<\/p>\n

    int ret=setsockopt(sock_fd,SOL_SOCKET,SO_RCVTIMEO,&timeout,sizeof(timeout));<\/p>\n

\n\t\u800csolaris\uff0c\u5219\u4e0d\u652f\u6301\u3002\n<\/p>\n

\n\t\u6ce8\u610f\uff1a\u8bbe\u7f6e\u4e86socket\u7684\u8d85\u65f6\u9009\u9879\uff0c\u53ea\u80fd\u5728\u8c03\u7528recv()\u6216send()\u88ab\u963b\u585e\u65f6\u624d\u4f1a\u8d77\u4f5c\u7528\uff0c\u975e\u963b\u585e\u7684socket\u4e0d\u4f1a\u56e0\u4e3a\u8bbe\u7f6e\u4e86\u8d85\u65f6\u800c\u88ab\u9500\u6bc1\u3002\n<\/p>\n

\n\t\n<\/p>\n

\n\trecv\u51fd\u6570\n<\/p>\n

\n\tint recv( SOCKET s, char FAR *buf, int len, int flags);\n<\/p>\n

\n\t\u4e0d\u8bba\u662f\u5ba2\u6237\u8fd8\u662f\u670d\u52a1\u5668\u5e94\u7528\u7a0b\u5e8f\u90fd\u7528recv\u51fd\u6570\u4eceTCP\u8fde\u63a5\u7684\u53e6\u4e00\u7aef\u63a5\u6536\u6570\u636e\u3002\n<\/p>\n

\n\t\u8be5\u51fd\u6570\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u6307\u5b9a\u63a5\u6536\u7aef\u5957\u63a5\u5b57\u63cf\u8ff0\u7b26\uff1b <\/span>\n<\/p>\n

\n\t\u7b2c\u4e8c\u4e2a\u53c2\u6570\u6307\u660e\u4e00\u4e2a\u7f13\u51b2\u533a\uff0c\u8be5\u7f13\u51b2\u533a\u7528\u6765\u5b58\u653erecv\u51fd\u6570\u63a5\u6536\u5230\u7684\u6570\u636e\uff1b <\/span>\n<\/p>\n

\n\t\u7b2c\u4e09\u4e2a\u53c2\u6570\u6307\u660ebuf\u7684\u957f\u5ea6\uff1b \u7b2c\u56db\u4e2a\u53c2\u6570\u4e00\u822c\u7f6e0\u3002\n<\/p>\n

\n\t\u8fd9\u91cc\u53ea\u63cf\u8ff0\u540c\u6b65Socket\u7684recv\u51fd\u6570\u7684\u6267\u884c\u6d41\u7a0b\u3002\u5f53\u5e94\u7528\u7a0b\u5e8f\u8c03\u7528recv\u51fd\u6570\u65f6\uff0c\n<\/p>\n

\n\t\uff081\uff09recv\u5148\u7b49\u5f85s\u7684\u53d1\u9001\u7f13\u51b2\u4e2d\u7684\u6570\u636e\u88ab\u534f\u8bae\u4f20\u9001\u5b8c\u6bd5\uff0c\u5982\u679c\u534f\u8bae\u5728\u4f20\u9001s\u7684\u53d1\u9001\u7f13\u51b2\u4e2d\u7684\u6570\u636e\u65f6\u51fa\u73b0\u7f51\u7edc\u9519\u8bef\uff0c\u90a3\u4e48recv\u51fd\u6570\u8fd4\u56deSOCKET_ERROR\uff0c\n<\/p>\n

\n\t\uff082\uff09\u5982\u679cs\u7684\u53d1\u9001\u7f13\u51b2\u4e2d\u6ca1\u6709\u6570\u636e\u6216\u8005\u6570\u636e\u88ab\u534f\u8bae\u6210\u529f\u53d1\u9001\u5b8c\u6bd5\u540e\uff0crecv\u5148\u68c0\u67e5\u5957\u63a5\u5b57s\u7684\u63a5\u6536\u7f13\u51b2\u533a\uff0c\n<\/p>\n

\n\t\u5982\u679cs\u63a5\u6536\u7f13\u51b2\u533a\u4e2d\u6ca1\u6709\u6570\u636e\u6216\u8005\u534f\u8bae\u6b63\u5728\u63a5\u6536\u6570 \u636e\uff0c\u90a3\u4e48recv\u5c31\u4e00\u76f4\u7b49\u5f85\uff0c\u76f4\u5230\u534f\u8bae\u628a\u6570\u636e\u63a5\u6536\u5b8c\u6bd5\u3002\n<\/p>\n

\n\t\u5f53\u534f\u8bae\u628a\u6570\u636e\u63a5\u6536\u5b8c\u6bd5\uff0crecv\u51fd\u6570\u5c31\u628as\u7684\u63a5\u6536\u7f13\u51b2\u4e2d\u7684\u6570\u636ecopy\u5230buf\u4e2d\n<\/p>\n

\n\t\uff08\u6ce8\u610f\u534f\u8bae\u63a5\u6536\u5230\u7684\u6570\u636e\u53ef\u80fd\u5927\u4e8ebuf\u7684\u957f\u5ea6\uff0c\u6240\u4ee5 \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u8981\u8c03\u7528\u51e0\u6b21recv\u51fd\u6570\u624d\u80fd\u628as\u7684\u63a5\u6536\u7f13\u51b2\u4e2d\u7684\u6570\u636ecopy\u5b8c\u3002\n<\/p>\n

\n\trecv\u51fd\u6570\u4ec5\u4ec5\u662fcopy\u6570\u636e\uff0c\u771f\u6b63\u7684\u63a5\u6536\u6570\u636e\u662f\u534f\u8bae\u6765\u5b8c\u6210\u7684\uff09\uff0c recv\u51fd\u6570\u8fd4\u56de\u5176\u5b9e\u9645copy\u7684\u5b57\u8282\u6570\u3002\n<\/p>\n

\n\t\u5982\u679crecv\u5728copy\u65f6\u51fa\u9519\uff0c\u90a3\u4e48\u5b83\u8fd4\u56deSOCKET_ERROR\uff1b\n<\/p>\n

\n\t\u5982\u679crecv\u51fd\u6570\u5728\u7b49\u5f85\u534f\u8bae\u63a5\u6536\u6570\u636e\u65f6\u7f51\u7edc\u4e2d\u65ad\u4e86\uff0c\u90a3\u4e48\u5b83\u8fd4\u56de0\u3002\n<\/p>\n

\n\t\u9ed8\u8ba4 socket \u662f\u963b\u585e\u7684 \u89e3\u963b\u585e\u4e0e\u975e\u963b\u585erecv\u8fd4\u56de\u503c\u6ca1\u6709\u533a\u5206\uff0c\u90fd\u662f <\/span><0 \u51fa\u9519 =0 \u8fde\u63a5\u5173\u95ed >0 \u63a5\u6536\u5230\u6570\u636e\u5927\u5c0f<\/strong>\uff0c\n<\/p>\n

\n\t\u7279\u522b\uff1a\n<\/p>\n

\n\t\u8fd4\u56de\u503c<0\u65f6\u5e76\u4e14(errno == EINTR || errno == EWOULDBLOCK || errno == EAGAIN)\u7684\u60c5\u51b5\u4e0b\u8ba4\u4e3a\u8fde\u63a5\u662f\u6b63\u5e38\u7684\uff0c\u7ee7\u7eed\u63a5\u6536\u3002\n<\/p>\n

\n\t\u53ea\u662f\u963b\u585e\u6a21\u5f0f\u4e0brecv\u4f1a\u963b\u585e\u7740\u63a5\u6536\u6570\u636e\uff0c\u975e\u963b\u585e\u6a21\u5f0f\u4e0b\u5982\u679c\u6ca1\u6709\u6570\u636e\u4f1a\u8fd4\u56de\uff0c\u4e0d\u4f1a\u963b\u585e\u7740\u8bfb\uff0c\u56e0\u6b64\u9700\u8981\u5faa\u73af\u8bfb\u53d6\uff09\u3002\n<\/p>\n

\n\t\u8fd4\u56de\u8bf4\u660e\uff1a <\/span>\n<\/p>\n

\n\t\u6210\u529f\u6267\u884c\u65f6\uff0c\u8fd4\u56de\u63a5\u6536\u5230\u7684\u5b57\u8282\u6570\u3002\n<\/p>\n

\n\t\u53e6\u4e00\u7aef\u5df2\u5173\u95ed\u5219\u8fd4\u56de0\u3002\n<\/p>\n

\n\t\u5931\u8d25\u8fd4\u56de-1\uff0c\n<\/p>\n

\n\terrno\u88ab\u8bbe\u4e3a\u4ee5\u4e0b\u7684\u67d0\u4e2a\u503c <\/span>\n<\/p>\n

\n\tEAGAIN\uff1a\u5957\u63a5\u5b57\u5df2\u6807\u8bb0\u4e3a\u975e\u963b\u585e\uff0c\u800c\u63a5\u6536\u64cd\u4f5c\u88ab\u963b\u585e\u6216\u8005\u63a5\u6536\u8d85\u65f6 <\/span>\n<\/p>\n

\n\tEBADF\uff1asock\u4e0d\u662f\u6709\u6548\u7684\u63cf\u8ff0\u8bcd <\/span>\n<\/p>\n

\n\tECONNREFUSE\uff1a\u8fdc\u7a0b\u4e3b\u673a\u963b\u7edd\u7f51\u7edc\u8fde\u63a5 <\/span>\n<\/p>\n

\n\tEFAULT\uff1a\u5185\u5b58\u7a7a\u95f4\u8bbf\u95ee\u51fa\u9519 <\/span>\n<\/p>\n

\n\tEINTR\uff1a\u64cd\u4f5c\u88ab\u4fe1\u53f7\u4e2d\u65ad <\/span>\n<\/p>\n

\n\tEINVAL\uff1a\u53c2\u6570\u65e0\u6548 <\/span>\n<\/p>\n

\n\tENOMEM\uff1a\u5185\u5b58\u4e0d\u8db3 <\/span>\n<\/p>\n

\n\tENOTCONN\uff1a\u4e0e\u9762\u5411\u8fde\u63a5\u5173\u8054\u7684\u5957\u63a5\u5b57\u5c1a\u672a\u88ab\u8fde\u63a5\u4e0a <\/span>\n<\/p>\n

\n\tENOTSOCK\uff1asock\u7d22\u5f15\u7684\u4e0d\u662f\u5957\u63a5\u5b57 \u5f53\u8fd4\u56de\u503c\u662f0\u65f6\uff0c\u4e3a\u6b63\u5e38\u5173\u95ed\u8fde\u63a5\uff1b\n<\/p>\n

\n\t\u601d\u8003\uff1a\n<\/p>\n

\n\t\u5f53\u5bf9\u4fa7\u6ca1\u6709send\uff0c\u5373\u672c\u4fa7\u7684\u5957\u63a5\u5b57s\u7684\u63a5\u6536\u7f13\u51b2\u533a\u65e0\u6570\u636e\uff0c\u8fd4\u56de\u503c\u662f\u4ec0\u4e48\uff08EAGAIN\uff0c\u539f\u56e0\u4e3a\u8d85\u65f6\uff0c\u5f85\u6d4b\uff09\n<\/p>\n

\n\t<\/p>\n","protected":false},"excerpt":{"rendered":"

linux\u548cwindows\u4e0b\u7528setsockopt\u8bbe\u7f6eSO_SNDTIMEO,SO_RCVTIMEO\u7684\u53c2\u6570\u7684\u4e00\u70b9\u533a\u522b  <\/p>\n

UDP\u7684socket\u5728\u67d0\u4e9b\u60c5\u51b5\uff1a\u5982\u5bf9\u65b9\u5173\u95ed\u65f6\uff0c\u672c\u5730\u53ef\u80fdsendto\u4e0d\u51fa\u53bb\u6570\u636e\uff0c\u7136\u540erecvfrom\u5c31\u4f1a\u88ab\u963b\u585e\uff0c\u8fd9\u65f6\u5c31\u9700\u8981\u8bbe\u7f6e \u8fd9\u4e24\u4e2a\u53c2\u6570\u7684\u503c\u63d0\u9ad8\u7a0b\u5e8f\u8d28\u91cf\u3002<\/p>\n

linux:<\/p>\n

    struct timeval timeout={3,0…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[324],"tags":[],"class_list":["post-122","post","type-post","status-publish","format-standard","hentry"],"yoast_head":"\nsocket\u8bbe\u7f6e\u8d85\u65f6 - Wayne's Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/weizn.net\/?p=122\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"socket\u8bbe\u7f6e\u8d85\u65f6 - Wayne's Blog\" \/>\n<meta property=\"og:description\" content=\"linux\u548cwindows\u4e0b\u7528setsockopt\u8bbe\u7f6eSO_SNDTIMEO,SO_RCVTIMEO\u7684\u53c2\u6570\u7684\u4e00\u70b9\u533a\u522b   UDP\u7684socket\u5728\u67d0\u4e9b\u60c5\u51b5\uff1a\u5982\u5bf9\u65b9\u5173\u95ed\u65f6\uff0c\u672c\u5730\u53ef\u80fdsendto\u4e0d\u51fa\u53bb\u6570\u636e\uff0c\u7136\u540erecvfrom\u5c31\u4f1a\u88ab\u963b\u585e\uff0c\u8fd9\u65f6\u5c31\u9700\u8981\u8bbe\u7f6e \u8fd9\u4e24\u4e2a\u53c2\u6570\u7684\u503c\u63d0\u9ad8\u7a0b\u5e8f\u8d28\u91cf\u3002 linux:     struct timeval timeout={3,0...\" \/>\n<meta property=\"og:url\" content=\"http:\/\/weizn.net\/?p=122\" \/>\n<meta property=\"og:site_name\" content=\"Wayne's Blog\" \/>\n<meta property=\"article:published_time\" content=\"2015-05-04T12:09:01+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"zinan\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"http:\/\/weizn.net\/#website\",\"url\":\"http:\/\/weizn.net\/\",\"name\":\"Wayne's Blog\",\"description\":\"\",\"publisher\":{\"@id\":\"http:\/\/weizn.net\/#\/schema\/person\/e88bc12c590502d8b6249326f960b264\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"http:\/\/weizn.net\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"WebPage\",\"@id\":\"http:\/\/weizn.net\/?p=122#webpage\",\"url\":\"http:\/\/weizn.net\/?p=122\",\"name\":\"socket\\u8bbe\\u7f6e\\u8d85\\u65f6 - 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