{"id":761,"date":"2014-01-28T16:28:07","date_gmt":"2014-01-28T08:28:07","guid":{"rendered":"http:\/\/coderbee.net\/?p=761"},"modified":"2014-01-28T17:21:33","modified_gmt":"2014-01-28T09:21:33","slug":"tcpip-%e5%8d%8f%e8%ae%ae%e8%af%a6%e8%a7%a3-%e7%ac%ac17%e7%ab%a0-tcp-%e4%bc%a0%e8%be%93%e6%8e%a7%e5%88%b6%e5%8d%8f%e8%ae%ae","status":"publish","type":"post","link":"https:\/\/coderbee.net\/index.php\/basis\/20140128\/761","title":{"rendered":"TCP\/IP \u534f\u8bae\u8be6\u89e3 \u7b2c17\u7ae0 TCP \u4f20\u8f93\u63a7\u5236\u534f\u8bae"},"content":{"rendered":"<p>TCP\u4f7f\u7528\u7f51\u7edc\u5c42\uff08IP\uff09\uff0c\u63d0\u4f9b\u4e86\u4e00\u79cd\u9762\u5411\u8fde\u63a5\u7684\u3001\u53ef\u9760\u7684\u5b57\u8282\u6d41\u670d\u52a1\u3002<\/p>\n<p>\u9762\u5411\u8fde\u63a5\u610f\u5473\u7740\u4e24\u4e2a\u4f7f\u7528TCP\u534f\u8bae\u7684\u5e94\u7528\u5728\u5f7c\u6b64\u4ea4\u6362\u6570\u636e\u4e4b\u524d\u5fc5\u987b\u5148\u5efa\u7acb\u4e00\u4e2aTCP\u8fde\u63a5\u3002<\/p>\n<p>TCP\u4f7f\u7528\u4ee5\u4e0b\u65b9\u5f0f\u6765\u63d0\u4f9b\u53ef\u9760\u670d\u52a1\uff1a<\/p>\n<ul>\n<li>\u5e94\u7528\u6570\u636e\u88ab\u5206\u5272\u6210TCP\u8ba4\u4e3a\u6700\u9002\u5408\u53d1\u9001\u7684\u6570\u636e\u5757\u3002\u7531TCP\u4f20\u9012\u7ed9IP\u7684\u4fe1\u606f\u5355\u4f4d\u79f0\u4e3a\u62a5\u6587\u6bb5\u6216\u6bb5\uff08segment\uff09\u3002<\/li>\n<li>\u5f53TCP\u53d1\u51fa\u4e00\u4e2a\u6bb5\u540e\uff0c\u5b83\u542f\u52a8\u4e00\u4e2a\u5b9a\u65f6\u5668\uff0c\u7b49\u5f85\u76ee\u7684\u7aef\u786e\u8ba4\u6536\u5230\u8fd9\u4e2a\u62a5\u6587\u6bb5\u3002\u5982\u679c\u4e0d\u80fd\u53ca\u65f6\u6536\u5230\u4e00\u4e2a\u786e\u8ba4\uff0c\u5c06\u91cd\u53d1\u8fd9\u4e2a\u62a5\u6587\u6bb5\u3002<\/li>\n<li>\u5f53TCP\u6536\u5230\u53d1\u81eaTCP\u8fde\u63a5\u53e6\u4e00\u7aef\u7684\u6570\u636e\uff0c\u5b83\u5c06\u53d1\u9001\u4e00\u4e2a\u786e\u8ba4\u3002\u8fd9\u4e2a\u786e\u8ba4\u4e0d\u662f\u7acb\u5373\u53d1\u9001\uff0c\u901a\u5e38\u5c06\u63a8\u8fdf\u51e0\u5206\u4e4b\u4e00\u79d2\u3002<\/li>\n<li>TCP\u5c06\u4fdd\u6301\u5b83\u9996\u90e8\u548c\u6570\u636e\u7684\u6821\u9a8c\u548c\u3002\u8fd9\u662f\u4e00\u4e2a\u7aef\u5230\u7aef\u7684\u6821\u9a8c\u548c\uff0c\u76ee\u7684\u662f\u68c0\u6d4b\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u7684\u4efb\u4f55\u53d8\u5316\u3002\u5982\u679c\u6536\u5230\u7684\u6821\u9a8c\u548c\u6709\u5dee\u9519\uff0cTCP\u5c06\u4e22\u5f03\u8fd9\u4e2a\u62a5\u6587\u6bb5\u548c\u4e0d\u7f3a\u4eba\u6536\u5230\u8fd9\u4e2a\u62a5\u6587\u6bb5\uff08\u5e0c\u671b\u53d1\u7aef\u8d85\u65f6\u5e76\u91cd\u53d1\uff09\u3002<\/li>\n<li>TCP\u62a5\u6587\u6bb5\u63a5\u6536\u5230\u7684\u987a\u5e8f\u662f\u4e0d\u786e\u5b9a\u7684\uff0c\u6240\u4ee5TCP\u5c06\u5bf9\u6536\u5230\u7684\u6570\u636e\u8fdb\u884c\u91cd\u65b0\u6392\u5e8f\uff0c\u5c06\u6536\u5230\u7684\u6570\u636e\u4ee5\u6b63\u786e\u7684\u987a\u5e8f\u4ea4\u7ed9\u5e94\u7528\u5c42\u3002<\/li>\n<li>IP\u6570\u636e\u5305\u8fd8\u4f1a\u53d1\u751f\u91cd\u590d\uff0cTCP\u7684\u63a5\u6536\u7aef\u5fc5\u987b\u4e22\u5f03\u91cd\u590d\u7684\u6570\u636e\u3002<\/li>\n<li>TCP\u8fd8\u80fd\u63d0\u4f9b\u6d41\u91cf\u63a7\u5236\u3002TCP\u8fde\u63a5\u7684\u53cc\u65b9\u90fd\u6709\u56fa\u5b9a\u5927\u5c0f\u7684\u7f13\u51b2\u7a7a\u95f4\u3002TCP\u7684\u63a5\u6536\u7aef\u53ea\u5141\u8bb8\u53e6\u4e00\u7aef\u53d1\u9001\u63a5\u6536\u7aef\u7f13\u51b2\u533a\u6240\u80fd\u63a5\u7eb3\u7684\u6570\u636e\u3002\n<\/li>\n<\/ul>\n<p><!--more--><\/p>\n<p>\u4e00\u7aef\u5c06\u5b57\u8282\u6d41\u653e\u5230TCP\u8fde\u63a5\u4e0a\uff0c\u540c\u6837\u7684\u5b57\u8282\u6d41\u5c06\u51fa\u73b0\u5728TCP\u8fde\u63a5\u7684\u53e6\u4e00\u7aef\u3002TCP\u5bf9\u5b57\u8282\u6d41\u4e0d\u4f5c\u4efb\u4f55\u89e3\u91ca\u3002<\/p>\n<p>TCP\u6570\u636e\u5728IP\u6570\u636e\u62a5\u4e2d\u7684\u5c01\u88c5\uff1a<br \/>\n<img decoding=\"async\" src=\"\/\/coderbee.net\/wp-content\/uploads\/2014\/01\/TCP-in-IP.png\" alt=\"TCP\u6570\u636e\u5728IP\u6570\u636e\u62a5\u4e2d\u7684\u5c01\u88c5\" \/><\/p>\n<p>TCP\u5305\u9996\u90e8\uff1a<br \/>\n<img decoding=\"async\" src=\"\/\/coderbee.net\/wp-content\/uploads\/2014\/01\/TCP-header.png\" alt=\"TCP\u5305\u9996\u90e8\" \/><\/p>\n<ul>\n<li>\u6e90\u7aef\u53e3\u53f7\u548c\u76ee\u7684\u7aef\u53e3\u53f7\u7528\u4e8e\u5bfb\u627e\u53d1\u7aef\u548c\u6536\u7aef\u5e94\u7528\u7a0b\u5e8f\u3002\u4e24\u4e2a\u7aef\u53e3\u53f7\u52a0\u4e0a\u6e90\u7aefIP\u5730\u5740\u548c\u76ee\u7684\u7aefIP\u5730\u5740\u53ef\u4ee5\u552f\u4e00\u786e\u5b9a\u4e00\u4e2aTCP\u8fde\u63a5\u3002\u4e00\u4e2aIP\u5730\u5740\u548c\u4e00\u4e2a\u7aef\u53e3\u53f7\u79f0\u4e3a\u4e00\u4e2aSocket\u3002<\/p>\n<\/li>\n<li>\n<p>\u5e8f\u53f7\u7528\u6765\u6807\u8bc6TCP\u53d1\u7aef\u5411\u6536\u7aef\u53d1\u9001\u7684\u6570\u636e\u5b57\u8282\u6d41\uff0c\u8868\u793a\u5728\u8fd9\u4e2a\u62a5\u6587\u6bb5\u4e2d\u7684\u7b2c\u4e00\u4e2a\u6570\u636e\u5b57\u8282\u3002\u65e0\u7b26\u53f7\u6574\u6570\uff0c\u5230\u8fbe <code>2^32-1<\/code> \u540e\u53c8\u4ece <code>0<\/code> \u5f00\u59cb\u3002<\/p>\n<blockquote><p>\n  \u5f53\u5efa\u7acb\u8fde\u63a5\u65f6\uff0cSYN \u6807\u5fd7\u53d8 1\uff0c\u5e8f\u53f7\u5b57\u6bb5\u5305\u542b\u7531\u8fd9\u4e2a\u4e3b\u673a\u9009\u62e9\u7684\u8be5\u8fde\u63a5\u7684\u521d\u59cb\u5e8f\u53f7 ISN\uff08initial Sequence Number\uff09\u3002\u8be5\u4e3b\u673a\u53d1\u9001\u7684\u7b2c\u4e00\u4e2a\u5b57\u8282\u7684\u5e8f\u53f7\u662f\u8fd9\u4e2a ISN \u52a0 1\uff0c\u56e0\u4e3a SYN \u6d88\u8017\u4e86\u4e00\u4e2a\u5e8f\u53f7\u3002<\/p>\n<p>    \u786e\u8ba4\u5e8f\u53f7\u5305\u542b\u53d1\u9001\u786e\u8ba4\u7684\u4e00\u7aef\u6240\u671f\u671b\u63a5\u6536\u5230\u7684\u4e0b\u4e00\u4e2a\u5e8f\u53f7\uff0c\u5e94\u5f53\u662f\u4e0a\u6b21\u5df2\u6210\u529f\u6536\u5230\u6570\u636e\u5b57\u8282\u5e8f\u53f7\u52a01\u3002\u53ea\u6709 ACK \u6807\u5fd7\u4e3a 1 \u65f6\u786e\u8ba4\u5e8f\u53f7\u5b57\u6bb5\u624d\u6709\u6548\u3002<\/p>\n<p>    TCP\u4e3a\u5e94\u7528\u5c42\u63d0\u4f9b\u5168\u53cc\u5de5\u670d\u52a1\uff0c\u6570\u636e\u80fd\u5728\u4e24\u4e2a\u65b9\u5411\u4e0a\u8fdb\u884c\u4f20\u8f93\uff0c\u56e0\u6b64\u8fde\u63a5\u7684\u6bcf\u4e00\u7aef\u5fc5\u987b\u4fdd\u6301\u6bcf\u4e2a\u65b9\u5411\u4e0a\u7684\u4f20\u8f93\u5e8f\u53f7\u3002\n<\/p><\/blockquote>\n<\/li>\n<li>\u9996\u90e8\u957f\u5ea6\u7ed9\u51fa\u9996\u90e8\u4e2d 32bit \u5b57\u7684\u6570\u76ee\uff0c\u6240\u4ee5TCP\u9996\u90e8\u7684\u957f\u5ea6\u8303\u56f4\u662f <code>[20-60]<\/code> \u4e2a\u5b57\u8282\u3002<\/p>\n<\/li>\n<li>\n<p>TCP\u9996\u90e8\u4e2d\u6709 6 \u4e2a\u6807\u5fd7\u6bd4\u7279\uff0c\u53ef\u88ab\u540c\u65f6\u8bbe\u7f6e\u4e3a 1 \u6765\u8868\u793a\u8be5\u6807\u5fd7\u6709\u6548\uff1a<\/p>\n<blockquote><p>\n  URG\uff1a\u7d27\u6025\u6307\u9488\uff08urgent pointer\uff09\u3002<br \/>\n    ACK\uff1a\u786e\u8ba4\u5e8f\u53f7\u3002<br \/>\n    PSH\uff1a\u63a5\u6536\u65b9\u5e94\u8be5\u5c3d\u5feb\u5c06\u8fd9\u4e2a\u62a5\u6587\u6bb5\u4ea4\u7ed9\u5e94\u7528\u5c42\u3002<br \/>\n    RST\uff1a\u91cd\u5efa\u8fde\u63a5\u3002<br \/>\n    SYN\uff1a\u540c\u6b65\u5e8f\u53f7\uff0c\u7528\u6765\u53d1\u8d77\u4e00\u4e2a\u8fde\u63a5\u3002<br \/>\n    FIN\uff1a\u53d1\u7aef\u5b8c\u6210\u53d1\u9001\u4efb\u52a1\uff0c\u7528\u4e8e\u5173\u95ed\u3002\n<\/p><\/blockquote>\n<\/li>\n<li>\n<p>TCP\u6d41\u91cf\u63a7\u5236\u7531\u8fde\u63a5\u7684\u6bcf\u4e00\u7aef\u901a\u8fc7\u58f0\u660e\u7684\u7a97\u53e3\u5927\u5c0f\u6765\u63d0\u4f9b\u3002\u7a97\u53e3\u5927\u5c0f\u4e3a\u5b57\u8282\u6570\uff0c\u8d77\u59cb\u4e8e\u786e\u8ba4\u5e8f\u53f7\u5b57\u6bb5\u6307\u660e\u7684\u503c\uff0c\u8fd9\u4e2a\u503c\u662f\u63a5\u6536\u7aef\u6b63\u671f\u671b\u63a5\u6536\u7684\u5b57\u8282\u3002<\/p>\n<\/li>\n<li>\n<p>\u6821\u9a8c\u548c\u8986\u76d6\u4e86\u6574\u4e2aTCP\u62a5\u6587\u6bb5\uff1aTCP\u9996\u90e8\u548cTCP\u6570\u636e\u3002\u7531\u53d1\u7aef\u8ba1\u7b97\u548c\u5b58\u50a8\uff0c\u5e76\u7531\u6536\u7aef\u8fdb\u884c\u9a8c\u8bc1\u3002\uff08\u8ba1\u7b97\u65f6\u6821\u9a8c\u548c\u7684\u5b57\u6bb5\u5148\u8d4b\u4e3a 0 \u8fdb\u884c\u5360\u4f4d\uff09<\/p>\n<\/li>\n<li>\n<p>\u7d27\u6025\u6307\u9488\u53ea\u6709\u5728 URG \u6807\u5fd7\u7f6e\u4e3a 1 \u65f6\u624d\u6709\u6548\uff0c\u662f\u4e00\u4e2a\u6b63\u7684\u504f\u79fb\u91cf\uff0c\u548c\u5e8f\u53f7\u5b57\u6bb5\u4e2d\u7684\u503c\u76f8\u52a0\u8868\u793a\u7d27\u6025\u6570\u636e\u6700\u540e\u4e00\u4e2a\u5b57\u8282\u7684\u5e8f\u53f7\u3002TCP\u7684\u7d27\u6025\u65b9\u5f0f\u662f\u53d1\u9001\u7aef\u5411\u53e6\u4e00\u7aef\u53d1\u9001\u7d27\u6025\u6570\u636e\u7684\u4e00\u79cd\u65b9\u5f0f\u3002<\/p>\n<\/li>\n<li>\n<p>\u9009\u9879\u7528\u4e8e\u53ef\u9009\u5b57\u6bb5\uff0c\u5e38\u89c1\u7684\u6709\u6700\u957f\u62a5\u6587\u5927\u5c0f\uff0c\u53c8\u79f0\u4e3aMSS\uff08Maximum Segment Size\uff09\u3002<\/p>\n<\/li>\n<li>\n<p>\u6570\u636e\u90e8\u5206\u662f\u53ef\u9009\u7684\u3002<\/p>\n<\/li>\n<\/ul>\n<hr\/>\n<p>\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u5fae\u4fe1\u516c\u4f17\u53f7: <strong>coderbee\u7b14\u8bb0<\/strong>\uff0c\u53ef\u4ee5\u66f4\u53ca\u65f6\u56de\u590d\u4f60\u7684\u8ba8\u8bba\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"258\" height=\"258\" src=\"https:\/\/coderbee.net\/wp-content\/uploads\/2019\/01\/coderbee-note.jpg\" class=\"alignnone size-full wp-image-1707\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>TCP\u4f7f\u7528\u7f51\u7edc\u5c42\uff08IP\uff09\uff0c\u63d0\u4f9b\u4e86\u4e00\u79cd\u9762\u5411\u8fde\u63a5\u7684\u3001\u53ef\u9760\u7684\u5b57\u8282\u6d41\u670d\u52a1\u3002 \u9762\u5411\u8fde\u63a5\u610f\u5473 &hellip; <a href=\"https:\/\/coderbee.net\/index.php\/basis\/20140128\/761\">\u7ee7\u7eed\u9605\u8bfb <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[83],"tags":[153],"_links":{"self":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/761"}],"collection":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/comments?post=761"}],"version-history":[{"count":4,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/761\/revisions"}],"predecessor-version":[{"id":783,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/761\/revisions\/783"}],"wp:attachment":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/media?parent=761"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/categories?post=761"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/tags?post=761"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}