{"id":4401,"date":"2023-12-07T15:33:00","date_gmt":"2023-12-07T07:33:00","guid":{"rendered":"http:\/\/www.wangkaixuan.tech\/?p=4401"},"modified":"2023-12-12T08:54:00","modified_gmt":"2023-12-12T00:54:00","slug":"socket%e7%bc%96%e7%a8%8b%e5%a5%97%e6%8e%a5%e5%ad%97%e9%80%89%e9%a1%b9%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"http:\/\/www.wangkaixuan.tech\/?p=4401","title":{"rendered":"socket\u7f16\u7a0b\u5957\u63a5\u5b57\u9009\u9879\u5206\u6790"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">1.\u524d\u8a00<\/h1>\n\n\n\n<p>\u6211\u4eec\u8ba8\u8bba\u7684\u5957\u63a5\u5b57\u9009\u9879\uff0c\u8303\u56f4\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Linux\u5e73\u53f0\u4e0b<\/li>\n\n\n\n<li>TCP\u534f\u8bae<\/li>\n\n\n\n<li>\u670d\u52a1\u7aef<\/li>\n<\/ul>\n\n\n\n<p>\u5957\u63a5\u5b57\u9009\u9879\u901a\u8fc7\u4e0d\u540c\u7684\u7ec4\u5408\uff0c\u53ef\u4ee5\u8fbe\u6210\u4e0d\u540c\u7684\u6548\u679c\uff0c\u672c\u7740\u591f\u7528\u5c31\u884c\u7684\u539f\u5219\uff0c\u672c\u6587\u4ec5\u63a2\u8ba8\u5176\u4e2d\u7684\u4e00\u79cd\u8bbe\u5b9a\u65b9\u5f0f\u3002<\/p>\n\n\n\n<p>\u57fa\u672c\u7684\u53c2\u8003\u8d44\u6599\uff0c\u53ef\u4ee5\u5728\u300aUNIX\u7f51\u7edc\u7f16\u7a0b \u53771\u300b\u91cc\u627e\u5230\uff0c\u8fd9\u91cc\u4e0d\u518d\u622a\u56fe\u548c\u8d58\u8ff0\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">2.\u9009\u9879<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">2.1 \u8bbe\u5b9a\u65b9\u5f0f<\/h2>\n\n\n\n<p><strong>\u65b9\u5f0f1<\/strong>\uff1a\u8c03\u7528socket\u63a5\u53e3\u521b\u5efa\u670d\u52a1\u7aef\u4fa6\u542c\u5957\u63a5\u5b57\u7684\u65f6\u5019\u6307\u5b9a\uff0c\u51fd\u6570\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"552\" height=\"70\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-3.png\" alt=\"\" class=\"wp-image-4402\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-3.png 552w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-3-300x38.png 300w\" sizes=\"auto, (max-width: 552px) 100vw, 552px\" \/><\/figure>\n\n\n\n<p>\u5176\u4e2dtype\u5b57\u6bb5\u53ef\u4ee5\u6307\u5b9a\u5982\u4e0b\u4e24\u4e2a\u9009\u9879\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"792\" height=\"186\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-4.png\" alt=\"\" class=\"wp-image-4403\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-4.png 792w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-4-300x70.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-4-768x180.png 768w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-4-604x142.png 604w\" sizes=\"auto, (max-width: 792px) 100vw, 792px\" \/><\/figure>\n\n\n\n<p>\u7b2c\u4e00\u4e2a\u663e\u800c\u6613\u89c1\uff0c\u7528\u6765\u8bbe\u5b9a\u662f\u5426\u521b\u5efa\u975e\u963b\u585e\u5957\u63a5\u5b57\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e8c\u4e2a\u9009\u9879\u5728man-page\u4e2d\u7684\u89e3\u91ca\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"809\" height=\"419\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-5.png\" alt=\"\" class=\"wp-image-4405\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-5.png 809w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-5-300x155.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-5-768x398.png 768w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-5-521x270.png 521w\" sizes=\"auto, (max-width: 809px) 100vw, 809px\" \/><\/figure>\n\n\n\n<p>\u8fd9\u4e2a\u9009\u9879\u8ddffork\u548cexec\u8fd9\u4e24\u4e2a\u7cfb\u7edf\u8c03\u7528\u6709\u5173\uff0c\u76f8\u5173\u53c2\u8003\u8d44\u6599\u4e3a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u300aUNIX\u7f51\u7edc\u7f16\u7a0b \u53771\u300b4.7\u7ae0 fork\u548cexec\u51fd\u6570<\/li>\n\n\n\n<li>\u300aUNIX\u73af\u5883\u9ad8\u7ea7\u7f16\u7a0b\u300b8.10\u7ae0 \u51fd\u6570exec<\/li>\n<\/ul>\n\n\n\n<p>\u7b80\u5355\u7406\u89e3\u5c31\u662f\uff1a<\/p>\n\n\n\n<p>1.\u7236\u8fdb\u7a0bfork\u4e4b\u540e\uff0c\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e5f\u88ab\u590d\u5236\u4e86\uff0c\u7236\u5b50\u8fdb\u7a0b\u53ef\u4ee5\u5bf9\u540c\u4e00\u6587\u4ef6\u63cf\u8ff0\u7b26\u8fdb\u884c\u8bfb\u5199\uff0c\u6ca1\u6709\u95ee\u9898\uff0c\u6709\u65f6\u5019\u6211\u4eec\u751a\u81f3\u4f1a\u5229\u7528\u8fd9\u79cd\u7279\u6027\u6765\u5b9e\u73b0\u4e00\u4e9b\u529f\u80fd\uff0c\u6bd4\u5982\u7236\u8fdb\u7a0b\u4ece\u5957\u63a5\u5b57\u6536\uff0c\u5b50\u8fdb\u7a0b\u5f80\u5957\u63a5\u5b57\u53d1\u7b49\u3002\uff08\u8865\u5145\u77e5\u8bc6\uff1a\u5047\u8bbe\u7236\u8fdb\u7a0b\u6253\u5f00\u4e86\u4e00\u4e2a\u6587\u4ef6A\uff0c\u7236\u8fdb\u7a0bfork\u4e4b\u540e\uff0c\u76f8\u5f53\u4e8e\u5b50\u8fdb\u7a0b\u53c8\u6253\u5f00\u4e86\u4e00\u6b21\u6587\u4ef6A\uff0c\u7236\u5b50\u8fdb\u7a0b\u53ef\u4ee5\u5404\u81ea\u72ec\u7acb\u5173\u95ed\u8fd9\u4e2a\u6587\u4ef6A\uff0c\u5bf9\u5bf9\u65b9\u6ca1\u6709\u5f71\u54cd\uff0c\u8fdb\u7a0b\u6253\u5f00\u7684\u6587\u4ef6\u53ef\u4ee5\u7528lsof -p PID\u547d\u4ee4\u67e5\u770b\uff09<\/p>\n\n\n\n<p>2.\u4f46\u662f\u4e00\u65e6\u5b50\u8fdb\u7a0b\u8c03\u7528exec\u6267\u884c\u4e86\u53e6\u5916\u4e00\u4e2a\u7a0b\u5e8f\uff0c\u5b50\u8fdb\u7a0b\u7684\u51e0\u4e4e\u6240\u6709\u8d44\u6e90\u90fd\u5c06\u88ab\u6362\u51fa\uff08\u6b63\u6587\u3001\u6570\u636e\u3001\u5806\u3001\u6808\u7b49\uff09\uff0c\u53ea\u6709\u5c11\u6570\u4e00\u4e9b\u8d44\u6e90\u4f1a\u88ab\u65b0\u8fdb\u7a0b\u7ee7\u627f\uff08\u5982\u8fdb\u7a0bid\u7b49\uff0c\u8be6\u7ec6\u5217\u8868\u89c1\u300aUNIX\u73af\u5883\u9ad8\u7ea7\u7f16\u7a0b\u300b8.10\u7ae0 \u51fd\u6570exec\uff09\uff0c\u5bf9\u4e8e\u5b50\u8fdb\u7a0b\u6253\u5f00\u7684\u6587\u4ef6\uff0c\u9664\u975e\u88ab\u663e\u793a\u6307\u5b9aclose-on-exec\u6807\u8bc6\uff0c\u5426\u5219\u5728\u5b50\u8fdb\u7a0b\u6267\u884cexec\u540e\u5c31\u4e22\u4e86\uff0c\u53ea\u6709\u5728\u7a0b\u5e8f\u9000\u51fa\u540e\u624d\u4f1a\u88ab\u64cd\u4f5c\u7cfb\u7edf\u56de\u6536\u3002<\/p>\n\n\n\n<p>3.\u7b80\u800c\u8a00\u4e4b\u5c31\u662f\uff1a\u5982\u679c\u6ca1\u6709\u6307\u5b9aclose-on-exec\u6807\u8bc6\uff0c\u90a3\u4e48\u8fd9\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u4f1a\u5728\u8fdb\u7a0bfork+exec\u540e\u6cc4\u6f0f\uff0c\u53ea\u6709\u7a0b\u5e8f\u9000\u51fa\u624d\u4f1a\u88ab\u5173\u95ed\u56de\u6536\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u7684\u7a0b\u5e8f\u867d\u7136\u4e0d\u6d89\u53cafork\u548cexec\uff0c\u4f46\u6307\u5b9a\u4e86\u7b2c\u4e8c\u4e2a\u6807\u8bc6\u4e5f\u6ca1\u6709\u4ec0\u4e48\u574f\u5904\uff0c\u800c\u4e14\u8fd9\u662f\u4e00\u4e2a\u826f\u597d\u7684\u4e60\u60ef\uff0c\u6240\u4ee5\u6211\u4eec\u9ed8\u8ba4\u6307\u5b9a\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"883\" height=\"55\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-6.png\" alt=\"\" class=\"wp-image-4406\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-6.png 883w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-6-300x19.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-6-768x48.png 768w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-6-604x38.png 604w\" sizes=\"auto, (max-width: 883px) 100vw, 883px\" \/><\/figure>\n\n\n\n<p><strong>\u65b9\u5f0f2<\/strong>\uff1a\u8c03\u7528accept\u521b\u5efa\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u7684\u65f6\u5019\u6307\u5b9a\uff0c\u51fd\u6570\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"735\" height=\"222\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-8.png\" alt=\"\" class=\"wp-image-4411\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-8.png 735w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-8-300x91.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-8-604x182.png 604w\" sizes=\"auto, (max-width: 735px) 100vw, 735px\" \/><\/figure>\n\n\n\n<p>flags\u7684\u53ef\u9009\u503c\u4e5f\u662f\u53ea\u6709\u4e24\u4e2a\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"799\" height=\"170\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-9.png\" alt=\"\" class=\"wp-image-4412\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-9.png 799w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-9-300x64.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-9-768x163.png 768w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-9-604x129.png 604w\" sizes=\"auto, (max-width: 799px) 100vw, 799px\" \/><\/figure>\n\n\n\n<p>\u5177\u4f53\u4f5c\u7528\u76f8\u540c\uff0c\u4e0d\u518d\u8d58\u8ff0\uff0c\u6211\u4eec\u7684\u7a0b\u5e8f\u4e5f\u662f\u9ed8\u8ba4\u6307\u5b9a\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"680\" height=\"55\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-10.png\" alt=\"\" class=\"wp-image-4413\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-10.png 680w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-10-300x24.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-10-604x49.png 604w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/figure>\n\n\n\n<p><strong>\u65b9\u5f0f<\/strong>3\uff1a\u8c03\u7528setsockopt\u51fd\u6570\u6307\u5b9a\uff0c\u51fd\u6570\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"583\" height=\"176\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-7.png\" alt=\"\" class=\"wp-image-4407\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-7.png 583w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-7-300x91.png 300w\" sizes=\"auto, (max-width: 583px) 100vw, 583px\" \/><\/figure>\n\n\n\n<p>\u53ef\u4ee5\u8bbe\u7f6e\u7684\u5957\u63a5\u5b57\u9009\u9879\u5217\u8868\uff0c\u89c1<strong>\u300aUNIX\u7f51\u7edc\u7f16\u7a0b \u53771\u300b-7.2 getsockopt\u548csetsockopt\u51fd\u6570<\/strong>\u4e00\u8282\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u5b9e\u9645\u80fd\u7528\u5230\u7684\u6709\u4ee5\u4e0b\u51e0\u4e2a\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u5bf9\u8c61<\/td><td>level<\/td><td>optname<\/td><td>\u5907\u6ce8<\/td><\/tr><tr><td rowspan=\"2\">acceptfd<\/td><td>SOL_SOCKET<\/td><td>SO_REUSEADDR<\/td><td>\u5730\u5740\u91cd\u7528<\/td><\/tr><tr><td>SOL_SOCKET<\/td><td>SO_REUSEPORT<\/td><td>\u7aef\u53e3\u91cd\u7528<\/td><\/tr><tr><td rowspan=\"8\">clientfd<\/td><td>SOL_SOCKET<\/td><td>SO_SNDBUF<\/td><td>\u53d1\u9001\u7f13\u51b2<\/td><\/tr><tr><td>SOL_SOCKET<\/td><td>SO_RCVBUF<\/td><td>\u63a5\u6536\u7f13\u51b2<\/td><\/tr><tr><td>SOL_SOCKET<\/td><td>SO_KEEPALIVE<\/td><td rowspan=\"4\">\u4fdd\u6d3b\u5fc3\u8df3\uff08\u53ef\u9009\uff09<\/td><\/tr><tr><td>SOL_TCP<\/td><td>TCP_KEEPIDLE<\/td><\/tr><tr><td>SOL_TCP<\/td><td>TCP_KEEPINTVL<\/td><\/tr><tr><td>SOL_TCP<\/td><td>TCP_KEEPCNT<\/td><\/tr><tr><td>IPPROTO_TCP<\/td><td>TCP_NODELAY<\/td><td>\u7981\u7528Nagle\u7b97\u6cd5<\/td><\/tr><tr><td>SOL_SOCKET<\/td><td>SO_LINGER<\/td><td>\u5ef6\u8fdf\u5173\u95ed<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u4e0b\u9762\u7684\u7ae0\u8282\u5c06\u8be6\u7ec6\u63cf\u8ff0\u8fd9\u51e0\u4e2a\u5957\u63a5\u5b57\u9009\u9879\u7684\u4f5c\u7528\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.2 \u4fa6\u542c\u5957\u63a5\u5b57\u9009\u9879<\/h2>\n\n\n\n<p>\u4fa6\u542c\u5957\u63a5\u5b57\uff0c\u9664\u4e86\u4e00\u5f00\u59cb\u521b\u5efa\u7684\u65f6\u5019\u6307\u5b9a\u7684<strong>SOCK_NONBLOCK<\/strong>\u548c<strong>SOCK_CLOEXEC<\/strong>\u4e4b\u5916\uff0c\u8fd8\u9700\u8981\u6307\u5b9a<strong>SO_REUSEADDR<\/strong>\u548c<strong>SO_REUSEPORT<\/strong>\u3002<\/p>\n\n\n\n<p><strong>1\uff09SO_REUSEADDR<\/strong><\/p>\n\n\n\n<p>\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5f53\u4f60\u5feb\u901f\u91cd\u542f\u7a0b\u5e8f\u65f6\uff0c\u7cfb\u7edf\u4f1a\u63d0\u793a\u4f60\u5730\u5740\u5df2\u88ab\u5360\u7528\uff08bind\u5931\u8d25\uff09\uff0c\u5bfc\u81f4\u7a0b\u5e8f\u65e0\u6cd5\u542f\u52a8\uff0c\u8fc7\u4e00\u6bb5\u65f6\u95f4\uff0c\u7b49\u90a3\u4e9b\u672a\u5173\u95ed\u7684\u8001\u8fde\u63a5\u65ad\u5f00\uff0c\u76f8\u5173\u8d44\u6e90\u88ab\u64cd\u4f5c\u7cfb\u7edf\u56de\u6536\u540e\u624d\u80fd\u542f\u52a8\uff0c\u8fd9\u4e00\u8fc7\u7a0b\u53ef\u80fd\u957f\u8fbe\u6570\u5206\u949f\uff0c\u8fd9\u5728\u751f\u4ea7\u7cfb\u7edf\u4e0a\u662f\u4e0d\u53ef\u63a5\u53d7\u7684\u3002<\/p>\n\n\n\n<p>\u53e6\u5916\u4e00\u4e2a\u95ee\u9898\u662f\uff0c\u4f60\u65e0\u6cd5\u5728\u540c\u4e00\u4e2a<strong>\u7aef\u53e3<\/strong>\u4e0a\uff08\u6bd4\u598280\u7aef\u53e3\uff09\u4e0a\u542f\u52a8\u4e24\u4e2aTCP\u670d\u52a1\u5668\u7a0b\u5e8f\uff0c\u6765\u5b9e\u73b0\u8d1f\u8f7d\u5747\u8861\uff0c\u8fd9\u4f1a\u5f71\u54cd\u670d\u52a1\u5668\u7684\u6781\u9650\u541e\u5410\u91cf\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u5f53\u4f60\u7684\u670d\u52a1\u5668\u6709\u4e24\u4e2a\u672c\u5730\u5730\u5740\uff08\u7f51\u5361IP\uff0c\u6bd4\u5982192.168.1.1\u548c192.168.1.2\uff09\uff0c\u4f60\u60f3\u542f\u52a8\u4e24\u4e2a\u670d\u52a1\u5668\u7a0b\u5e8f\uff0c\u7ed1\u5b9a\u5728\u540c\u4e00\u4e2a\u7aef\u53e3\uff08\u6bd4\u598280\u7aef\u53e3\uff09\u4e0a\uff0c\u5206\u522b\u670d\u52a1\u4ece\u4e24\u4e2a\u5730\u5740\u53d1\u8d77\u7684TCP\u8fde\u63a5\u65f6\uff0c\u5c31\u5fc5\u987b\u6307\u5b9aSO_REUSEADDR\u9009\u9879\u3002<\/p>\n\n\n\n<p><strong>2\uff09SO_REUSEPORT<\/strong><\/p>\n\n\n\n<p>\u5982\u679c\u6307\u5b9a\u4e86\u8be5\u9009\u9879\uff0c\u4f1a\u5e26\u6765\u4e24\u4e2a\u597d\u5904\uff1a\u4e00\u662f\u4f60\u53ef\u4ee5\u5728\u540c\u4e00\u4e2a\u5730\u5740\uff08\u5373IP+\u7aef\u53e3\uff09\u4e0a\u542f\u52a8\u591a\u4e2a\u670d\u52a1\u5668\u7a0b\u5e8f\uff0c\u4e8c\u662f\u5f53\u8fd9\u4e2a\u5730\u5740\u4e0a\u6709\u65b0\u8fde\u63a5\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u81ea\u52a8\u5e2e\u4f60\u628a\u8fd9\u4e9b\u8fde\u63a5\u5747\u8861\u5730\u5206\u914d\u7ed9\u8fd9\u4e9b\u670d\u52a1\u5668\u7a0b\u5e8f\uff0c\u81ea\u52a8\u5b9e\u73b0\u8d1f\u8f7d\u5747\u8861\u3002<\/p>\n\n\n\n<p>\u7efc\u4e0a\uff0c\u4e24\u4e2a\u9009\u9879\u6211\u4eec\u90fd\u6307\u5b9a\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"675\" height=\"79\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-11.png\" alt=\"\" class=\"wp-image-4415\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-11.png 675w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-11-300x35.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-11-604x71.png 604w\" sizes=\"auto, (max-width: 675px) 100vw, 675px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">2.3 \u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u9009\u9879<\/h2>\n\n\n\n<p>\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\uff0c\u9664\u4e86\u4e00\u5f00\u59cb\u521b\u5efa\u7684\u65f6\u5019\u6307\u5b9a\u7684<strong>SOCK_NONBLOCK<\/strong>\u548c<strong>SOCK_CLOEXEC<\/strong>\u4e4b\u5916\uff0c\u8fd8\u9700\u8981\u6307\u5b9a\u5982\u4e0b\u51e0\u4e2a\u5957\u63a5\u5b57\u9009\u9879\u3002<\/p>\n\n\n\n<p><strong>1\uff09SO_SNDBUF\/SO_RCVBUF<\/strong><\/p>\n\n\n\n<p>\u8fd9\u4e24\u4e2a\u7528\u6765\u8bbe\u7f6e\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u53d1\u9001\u548c\u63a5\u6536\u7f13\u51b2\u533a\u7684\u5927\u5c0f\uff0c\u6709\u6761\u4ef6\u5c31\u8bbe\u5927\u70b9\uff0c\u80fd\u66f4\u597d\u5730\u5e94\u5bf9\u7a81\u53d1\u6d41\u91cf\uff0c\u51cf\u5c11TCP\u4e22\u5305\u91cd\u4f20\u95ee\u9898\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"716\" height=\"128\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-12.png\" alt=\"\" class=\"wp-image-4416\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-12.png 716w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-12-300x54.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-12-604x108.png 604w\" sizes=\"auto, (max-width: 716px) 100vw, 716px\" \/><\/figure>\n\n\n\n<p><strong>2\uff09SO_KEEPALIVE<\/strong>\u7b49\u56db\u4e2a\u9009\u9879<\/p>\n\n\n\n<p>SO_KEEPALIVE\u662f\u64cd\u4f5c\u7cfb\u7edf\u7ea7\u5b9e\u73b0\u7684\u4fdd\u6d3b\u5fc3\u8df3\u673a\u5236\uff0c\u9ed8\u8ba4\u5173\u95ed\u3002<\/p>\n\n\n\n<p>\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u90fd\u9700\u8981\u5728\u5e94\u7528\u5c42\u8bbe\u8ba1\u4e00\u4e2a\u5fc3\u8df3\u68c0\u6d4b\u534f\u8bae\uff0c\u4f46\u5982\u679c\u7531\u4e8e\u67d0\u4e9b\u539f\u56e0\u6ca1\u6709\u8bbe\u8ba1\u5fc3\u8df3\u534f\u8bae\uff0c\u6216\u8005\u5728\u67d0\u4e9b\u4e0d\u91cd\u8981\u7684\u7a0b\u5e8f\u4e2d\u60f3\u5077\u61d2\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528SO_KEEPALIVE\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"834\" height=\"218\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-13.png\" alt=\"\" class=\"wp-image-4418\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-13.png 834w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-13-300x78.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-13-768x201.png 768w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-13-604x158.png 604w\" sizes=\"auto, (max-width: 834px) 100vw, 834px\" \/><\/figure>\n\n\n\n<p>\u636e\u6211\u6240\u77e5\uff0cSO_KEEPALIVE\u89e6\u53d1\u5fc3\u8df3\u8d85\u65f6\u540e\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u5728\u5e95\u5c42\u9ed8\u9ed8\u5173\u95ed\u8fde\u63a5\uff0c\u5e76\u4e14\u4e0d\u4f1a\u5728\u5e94\u7528\u5c42\u5524\u9192\u7a0b\u5e8f\u7684\u591a\u8def\u590d\u7528\u51fd\u6570\uff08\u6bd4\u5982epoll_wait\uff09\uff0c\u53ea\u6709\u5f53\u4f60\u4e3b\u52a8\u5c1d\u8bd5\u5728\u8be5\u8fde\u63a5\u4e0a\u6536\u3001\u53d1\u6570\u636e\u65f6\uff0c\u624d\u4f1a\u89e6\u53d1\u9519\u8bef\uff08\u4e00\u822c\u662f\u89e6\u53d1Broken Pipe\u9519\u8bef\uff09\u3002\u5373\uff1a\u7531SO_KEEPALIVE\u89e6\u53d1\u7684\u8fde\u63a5\u5173\u95ed\uff0c\u5bf9\u5e94\u7528\u5c42\u4e0d\u53ef\u89c1\uff0c\u4e0d\u80fd\u65b9\u4fbf\u5730\u88ab\u5e94\u7528\u5c42\u53ca\u65f6\u68c0\u6d4b\u5230\u4ee5\u53ca\u65f6\u91ca\u653e\u8d44\u6e90\u3002<\/p>\n\n\n\n<p>\u53e6\u5916\u4e00\u4e2a\u95ee\u9898\u662f\uff0cSO_KEEPALIVE\u4e0d\u80fd\u68c0\u6d4b\u7a0b\u5e8f\u5047\u6b7b\uff0c\u5982\u679c\u7a0b\u5e8f\u7531\u4e8e\u67d0\u79cd\u539f\u56e0\u5361\u6b7b\u4e86\uff08\u6bd4\u5982\u5361\u5728\u67d0\u4e2abug\u5faa\u73af\u4e2d\u51fa\u4e0d\u6765\u4e86\uff09\uff0c\u6b64\u65f6\u7a0b\u5e8f\u5176\u5b9e\u5df2\u7ecf\u6ca1\u6709\u670d\u52a1\u80fd\u529b\u4e86\uff0c\u4f46\u7531\u4e8e\u7a0b\u5e8f\u6ca1\u6709\u9000\u51fa\uff0cSO_KEEPALIVE\u4e0d\u4f1a\u5224\u5b9a\u8fde\u63a5\u5f02\u5e38\uff0c\u800c\u5e94\u7528\u5c42\u5fc3\u8df3\u5219\u6ca1\u6709\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n\n\n\n<p>\u57fa\u4e8e\u4e0a\u8ff0\u539f\u56e0\uff0c\u6211\u4e2a\u4eba\u5176\u5b9e\u4e0d\u592a\u5efa\u8bae\u8bbe\u7f6eSO_KEEPALIVE\uff0c\u5e94\u7528\u7a0b\u5e8f\u5e94\u8be5\u4e3b\u52a8\u8bbe\u8ba1\u4e00\u4e2a\u5fc3\u8df3\u534f\u8bae\uff0cSO_KEEPALIVE\u53ea\u5728\u5341\u5206\u6709\u5fc5\u8981\u7684\u573a\u5408\u624d\u7528\u3002<\/p>\n\n\n\n<p><strong>3\uff09TCP_NODELAY<\/strong><\/p>\n\n\n\n<p>\u8be5\u9009\u9879\u7528\u4e8e\u7981\u7528TCP\u7684Nagle\u7b97\u6cd5\uff0c\u8be5\u7b97\u6cd5\u9ed8\u8ba4\u662f\u542f\u52a8\u72b6\u6001\u7684\uff0c\u5373\u7cfb\u7edf\u4f1a\u5c06\u4f60\u7684\u5c0f\u5305\u5ef6\u8fdf\u53d1\u9001\uff0c\u8ddf\u5176\u4ed6\u5305\u5408\u5e76\u540e\u6216\u8d85\u65f6\u540e\u518d\u53d1\u9001\u3002<\/p>\n\n\n\n<p>\u5f53\u4f60\u7684\u534f\u8bae\u4e2d\u5305\u542b\u957f\u5ea6\u8f83\u5c0f\u7684\u534f\u8bae\u5305\u65f6\uff08\u6bd4\u5982\u5fc3\u8df3\u5305\u3001\u65f6\u95f4\u5305\u7b49\uff09\uff0c\u5982\u679c\u6ca1\u6709\u542f\u7528TCP_NODELAY\uff08\u5373\u5173\u95edNagle\u7b97\u6cd5\uff09\uff0c\u4f1a\u9020\u6210\u8fd9\u4e9b\u5c0f\u5305\u6570\u636e\u4f20\u8f93\u4e0d\u53ca\u65f6\uff0c\u5f71\u54cd\u4e1a\u52a1\u903b\u8f91\u7684\u6b63\u786e\u6027\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u5f53\u4f60\u7684\u4e0b\u6e38\u4f9d\u8d56\u4f60\u53d1\u65f6\u95f4\u5305\u9a71\u52a8\u505a\u4e00\u4e9b\u4e8b\u60c5\u65f6\uff0c\u5982\u679c\u4f60\u7684\u5fc3\u8df3\u5305\u53d1\u9001\u4e0d\u53ca\u65f6\uff0c\u90a3\u4e48\u4e0b\u6e38\u7684\u4e1a\u52a1\u903b\u8f91\u53ef\u80fd\u5c31\u4f1a\u51fa\u95ee\u9898\u3002<\/p>\n\n\n\n<p>\u8be5\u9009\u9879\u5efa\u8bae\u6253\u5f00\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"822\" height=\"62\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-15.png\" alt=\"\" class=\"wp-image-4420\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-15.png 822w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-15-300x23.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-15-768x58.png 768w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-15-604x46.png 604w\" sizes=\"auto, (max-width: 822px) 100vw, 822px\" \/><\/figure>\n\n\n\n<p><strong>4\uff09SO_LINGER<\/strong><\/p>\n\n\n\n<p>\u8fd9\u4e2a\u9009\u9879\u7528\u4e8e\u5b9a\u4e49\u5173\u95ed\u5957\u63a5\u5b57\u65f6\uff0c\u5bf9\u4e8e\u53d1\u9001\u7f13\u51b2\u533a\u4e2d\u6b8b\u7559\u7684\u6570\u636e\u7684\u5904\u7406\u884c\u4e3a\uff0c\u8be5\u9009\u9879\u9ed8\u8ba4\u662f\u5173\u95ed\u7684\uff0c\u7a0b\u5e8f\u8c03\u7528close\u65f6\u4f1a\u7acb\u5373\u8fd4\u56de\uff0c\u6b8b\u7559\u5728\u53d1\u9001\u7f13\u51b2\u533a\u7684\u6570\u636e\u4f1a\u88ab\u7cfb\u7edf\u5c1d\u8bd5\u7ee7\u7eed\u53d1\u9001\u51fa\u53bb\u3002<\/p>\n\n\n\n<p>\u8fd9\u4e00\u9ed8\u8ba4\u884c\u4e3a\u7684\u5371\u5bb3\u6027\u5728\u4e8e\uff0c\u5047\u5982\u5bf9\u65b9\u6536\u7684\u6781\u6162\uff0c\u6216\u8005\u5bf9\u7aef\u7f51\u7edc\u76f4\u63a5\u6302\u4e86\uff0c\u90a3\u4e48\u670d\u52a1\u7aef\u7684\u8fd9\u4e9b\u5957\u63a5\u5b57\u8d44\u6e90\u6ca1\u6cd5\u88ab\u53ca\u65f6\u56de\u6536\uff0c\u5f71\u54cd\u670d\u52a1\u7aef\u7684\u670d\u52a1\u80fd\u529b\u3002<\/p>\n\n\n\n<p>\u800c\u5982\u679c\u4f60\u6253\u5f00\u4e86\u9009\u9879\uff0c\u53c8\u4f1a\u6709\u5176\u4ed6\u526f\u4f5c\u7528\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"105\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-17.png\" alt=\"\" class=\"wp-image-4424\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-17.png 768w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-17-300x41.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-17-604x83.png 604w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<p>\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u8fd9\u4e2a\u9009\u9879\u6709\u4e24\u4e2a\u53c2\u6570\uff0c\u7b2c\u4e00\u4e2a\u56fa\u5b9a\u586b1\uff0c\u8868\u793a\u6253\u5f00\u8be5\u529f\u80fd\uff0c\u7b2c\u4e8c\u4e2a\u53ef\u4ee5\u586b0\uff0c\u4e5f\u53ef\u4ee5\u586b1\u6216\u5176\u4ed6\u6b63\u6570\u503c\uff08\u8fd9\u91cc\u4ee5\u586b1\u4e3a\u4f8b\uff09\u3002<\/p>\n\n\n\n<p>\u586b0\u7684\u65f6\u5019\u8868\u793a\uff0c\u8fdb\u7a0b\u8c03\u7528close\u65f6\uff0c\u5957\u63a5\u5b57\u53d1\u9001\u7f13\u51b2\u533a\u4e2d\u7684\u6570\u636e\u4f1a\u88ab\u7acb\u5373\u4e22\u5f03\uff0c\u540c\u65f6\u53d1\u9001\u4e00\u4e2aRST\uff08\u800c\u4e0d\u662fFIN\uff09\u5230\u5bf9\u7aef\uff0c\u5957\u63a5\u5b57\u8d44\u6e90\uff08\u5305\u62ec\u6587\u4ef6\u63cf\u8ff0\u7b26\u548c\u7aef\u53e3\u53f7\uff09\u4f1a\u88ab\u7acb\u5373\u56de\u6536\u3002<\/p>\n\n\n\n<p>\u586b1\u7684\u65f6\u5019\uff1a<\/p>\n\n\n\n<p>\u5982\u679c\u5957\u63a5\u5b57\u662f\u963b\u585e\u7684\uff0c\u90a3\u4e48\u7a0b\u5e8f\u4f1a\u8fdb\u5165\u4f11\u7720\u72b6\u6001\uff08\u76f8\u5f53\u4e8e\u8fdb\u7a0b\u663e\u5f0f\u8c03\u7528sleep(1)\u51fd\u6570\uff09\uff0c\u76f4\u5230\u7f13\u51b2\u533a\u7684\u6570\u636e\u53d1\u9001\u5b8c\u6210\uff08\u6216\u51fa\u9519\uff0c\u6216\u8d85\u65f6\uff09\uff0c\u4e00\u4e2a\u9ad8\u6027\u80fd\u7684\u670d\u52a1\u5668\uff0c\u51b3\u4e0d\u80fd\u662f\u963b\u585e\u7684\uff0c\u56e0\u6b64\u8fd9\u4e2a\u60c5\u51b5\u4e0d\u8003\u8651\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u5957\u63a5\u5b57\u662f\u975e\u963b\u585e\u7684\uff0cclose\u4f1a\u7acb\u5373\u8fd4\u56de\uff0c\u53d1\u9001\u7f13\u51b2\u533a\u7684\u6570\u636e\u4f1a\u88ab\u7acb\u5373\u4e22\u5f03\uff0c\u5176\u884c\u4e3a\u7c7b\u4f3c\u4e8e\u586b0\u7684\u60c5\u51b5\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5bf9\u4e8e\u975e\u963b\u585e\u5957\u63a5\u5b57\uff0c\u8fd9\u4e2a\u8d85\u65f6\u53c2\u6570\u662f\u6ca1\u7528\u7684\uff0c\u53ea\u8981\u4f60\u6253\u5f00linger\u9009\u9879\uff0c\u7cfb\u7edf\u90fd\u4f1a\u5728\u4f60close\u7684\u65f6\u5019\u4e22\u5f03\u7f13\u51b2\u533a\u7684\u6570\u636e\uff0c\u540c\u65f6\u7ed9\u5bf9\u7aef\u53d1\u9001\u4e00\u4e2aRST\u3002<\/p>\n\n\n\n<p>\u7136\u800c\u5728\u67d0\u4e9b\u573a\u666f\u4e0b\uff0c\u6211\u4eec\u4e0d\u5e0c\u671b\u53d1\u9001\u7f13\u51b2\u533a\u7684\u6570\u636e\u88ab\u4e22\u5f03\uff0c\u6bd4\u5982\u8fd9\u4e2a\u4f8b\u5b50\uff1a\u5bf9\u65b9\u53d1\u51fa\u4e86\u4e00\u4e2a\u9000\u51fa\u767b\u5f55\u534f\u8bae\u5305\uff0c\u670d\u52a1\u5668\u6536\u5230\u540e\uff0c\u4f1a\u7ed9\u4ed6\u56de\u4e00\u4e2a\u9000\u51fa\u767b\u5f55\u6210\u529f\u534f\u8bae\u5305\uff0c\u5e76\u4e14\u5728\u8fd9\u4e2a\u5305\u4e2d\u9644\u5e26\u63d0\u4f9b\u4e00\u4e9b\u4fe1\u606f\uff0c\u53d1\u9001\u540e\u7acb\u5373close\u6389\u8fde\u63a5\u3002\u5982\u679c\u670d\u52a1\u5668\u6253\u5f00\u4e86linger\u9009\u9879\uff0c\u90a3\u4e48\u8fd9\u4e2a\u9000\u51fa\u767b\u5f55\u5e94\u7b54\u5305\u6781\u5927\u53ef\u80fd\u4f1a\u88ab\u76f4\u63a5\u4e22\u5f03\uff0c\u53d1\u4e0d\u5230\u5bf9\u7aef\u3002<\/p>\n\n\n\n<p>\u7efc\u4e0a\uff0c\u6211\u4eec\u5176\u5b9e\u4e0d\u5efa\u8bae\u8bbe\u7f6eLINGER\u9009\u9879\uff0c\u6211\u4eec\u76ee\u524d\u7684\u670d\u52a1\u5668\u5bf9\u5957\u63a5\u5b57\u548c\u7aef\u53e3\u8d44\u6e90\u7684\u4f7f\u7528\u91cf\u5e76\u4e0d\u5927\uff0c\u76f8\u6bd4\u8d44\u6e90\u56de\u6536\u7684\u901f\u5ea6\uff0c\u6211\u4eec\u5f53\u7136\u9009\u6b63\u786e\u6027\u3002\u56e0\u6b64\u6211\u4eec\u7684\u89c2\u70b9\u662f\uff0c\u8bbe\u7f6eLINGER\u9009\u9879\u5f0a\u5927\u4e8e\u5229\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.4 \u5176\u4ed6\u8bbe\u7f6e<\/h2>\n\n\n\n<p>\u521d\u5b66\u8005\u53ef\u80fd\u4f1a\u78b0\u89c1\u8fd9\u6837\u4e00\u4e2a\u573a\u666f\uff1a\u670d\u52a1\u5668\u7a0b\u5e8f\u8fd0\u884c\u5f97\u597d\u597d\u7684\uff0c\u7a81\u7136\u9000\u4e86\uff0c\u4e5f\u6ca1\u6709\u4efb\u4f55core\u6587\u4ef6\u4ea7\u751f\u3002<\/p>\n\n\n\n<p>\u539f\u56e0\u5c31\u662fSIGPIPE\u4fe1\u53f7\u6ca1\u6709\u5ffd\u7565\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"273\" height=\"20\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/12\/image-14.png\" alt=\"\" class=\"wp-image-4419\"\/><\/figure>\n\n\n\n<p>\u5f53\u4f60\u5c1d\u8bd5\u5f80\u4e00\u4e2a\u5df2\u7ecf\u88ab\u5bf9\u7aef\u5173\u95ed\u7684\u8fde\u63a5\u4e0a\u5199\u6570\u636e\u65f6\uff08\u7ecf\u5e38\u53d1\u751f\uff0c\u6bd4\u5982\u8fde\u63a5\u5df2\u7ecf\u88ab\u5bf9\u7aef\u65ad\u5f00\u4e86\uff0c\u4f60\u7684\u7a0b\u5e8f\u7531\u4e8e\u65f6\u5e8f\u95ee\u9898\u8fd8\u6ca1\u6709\u8d70\u5230recv\u51fd\u6570\u5904\u68c0\u6d4b\u5bf9\u7aef\u8fde\u63a5\u65ad\u5f00\uff0c\u800c\u662f\u5148\u8c03\u7528\u4e86send\u51fd\u6570\u53d1\u9001\u4e86\u4e00\u4e9b\u6570\u636e\uff0c\u6bd4\u5982\u5fc3\u8df3\u6570\u636e\uff09\uff0csend\u51fd\u6570\u5e76\u4e0d\u4f1a\u8fd4\u56de-1\u5e76\u4e14\u7ed9\u4f60\u8bbe\u7f6e\u76f8\u5e94\u7684\u9519\u8bef\u7801\uff0c\u800c\u662f\u76f4\u63a5\u89e6\u53d1\u7a0b\u5e8f\u7684SIGPIPE\u4fe1\u53f7\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u4f60\u6ca1\u6709\u663e\u5f0f\u5730\u6355\u83b7\u5e76\u5904\u7406\u8fd9\u4e2a\u4fe1\u53f7\uff0c\u5c31\u4f1a\u91c7\u7528\u9ed8\u8ba4\u7684\u5904\u7406\u65b9\u5f0f-\u9000\u51fa\u7a0b\u5e8f\u3002\u8fd9\u4e2a\u9000\u51fa\u662f\u5408\u7406\u5408\u6cd5\u7684\uff0c\u56e0\u6b64\u5e76\u4e0d\u4f1a\u4ea7\u751fcore\u6587\u4ef6\u3002\u5982\u679c\u4f60\u4e0d\u77e5\u9053\u8fd9\u4e2a\u673a\u5236\uff0c\u6392\u67e5\u7684\u65f6\u5019\u5c31\u4f1a\u975e\u5e38\u5934\u5927\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">3.\u5efa\u8bae\u6c47\u603b<\/h1>\n\n\n\n<p><strong>\u5efa\u8bae1<\/strong>\uff1a\u7a0b\u5e8f\u5ffd\u7565SIGPIPE\u4fe1\u53f7<\/p>\n\n\n\n<p><strong>\u5efa\u8bae2<\/strong>\uff1a\u8c03\u7528socket\u548caccept\u51fd\u6570\u521b\u5efa\u5957\u63a5\u5b57\u7684\u65f6\u5019\uff0c\u6307\u5b9aSOCK_NONBLOCK\u548cSOCK_CLOEXEC<\/p>\n\n\n\n<p><strong>\u5efa\u8bae3<\/strong>\uff1a\u989d\u5916\u7ed9\u4fa6\u542c\u5957\u63a5\u5b57\u548c\u5ba2\u6237\u8fde\u63a5\u5957\u63a5\u5b57\u8bbe\u7f6e\u5982\u4e0b\u9009\u9879\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u5bf9\u8c61<\/td><td>level<\/td><td>optname<\/td><td>\u5907\u6ce8<\/td><\/tr><tr><td rowspan=\"2\">acceptfd<\/td><td>SOL_SOCKET<\/td><td>SO_REUSEADDR<\/td><td>\u8bbe\u7f6e<\/td><\/tr><tr><td>SOL_SOCKET<\/td><td>SO_REUSEPORT<\/td><td>\u8bbe\u7f6e<\/td><\/tr><tr><td rowspan=\"8\">clientfd<\/td><td>SOL_SOCKET<\/td><td>SO_SNDBUF<\/td><td>\u8bbe\u7f6e<\/td><\/tr><tr><td>SOL_SOCKET<\/td><td>SO_RCVBUF<\/td><td>\u8bbe\u7f6e<\/td><\/tr><tr><td>SOL_SOCKET<\/td><td>SO_KEEPALIVE<\/td><td rowspan=\"4\">\u53ea\u6709\u5341\u5206\u5fc5\u8981\u518d\u8bbe\u7f6e<\/td><\/tr><tr><td>SOL_TCP<\/td><td>TCP_KEEPIDLE<\/td><\/tr><tr><td>SOL_TCP<\/td><td>TCP_KEEPINTVL<\/td><\/tr><tr><td>SOL_TCP<\/td><td>TCP_KEEPCNT<\/td><\/tr><tr><td>IPPROTO_TCP<\/td><td>TCP_NODELAY<\/td><td>\u8bbe\u7f6e<\/td><\/tr><tr><td>SOL_SOCKET<\/td><td>SO_LINGER<\/td><td>\u4e0d\u5efa\u8bae\u8bbe\u7f6e<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>1.\u524d\u8a00 \u6211\u4eec\u8ba8\u8bba\u7684\u5957\u63a5\u5b57\u9009\u9879\uff0c\u8303\u56f4\u662f\u8fd9\u6837\u7684\uff1a \u5957\u63a5\u5b57\u9009\u9879\u901a\u8fc7\u4e0d\u540c\u7684\u7ec4\u5408\uff0c\u53ef\u4ee5\u8fbe\u6210\u4e0d\u540c\u7684\u6548\u679c\uff0c\u672c\u7740\u591f\u7528\u5c31\u884c\u7684\u539f\u5219\uff0c\u672c\u6587\u4ec5\u63a2\u8ba8\u5176\u4e2d\u7684\u4e00\u79cd\u8bbe\u5b9a\u65b9\u5f0f\u3002 \u57fa\u672c\u7684\u53c2\u8003\u8d44\u6599&#8230;<\/p>\n<p class=\"read-more\"><a class=\"btn btn-default\" href=\"http:\/\/www.wangkaixuan.tech\/?p=4401\"> Read More<span class=\"screen-reader-text\">  Read More<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-4401","post","type-post","status-publish","format-standard","hentry","category-05-01-"],"_links":{"self":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/posts\/4401","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4401"}],"version-history":[{"count":0,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/posts\/4401\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4401"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4401"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4401"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}