{"id":1652,"date":"2014-12-06T02:20:06","date_gmt":"2014-12-06T02:20:06","guid":{"rendered":"http:\/\/ixyzero.com\/blog\/?p=1652"},"modified":"2014-12-06T02:20:06","modified_gmt":"2014-12-06T02:20:06","slug":"%e6%95%b0%e6%8d%ae%e5%8c%85%e9%87%8d%e7%bb%84%e7%9b%b8%e5%85%b3%e7%9f%a5%e8%af%86","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/1652.html","title":{"rendered":"\u6570\u636e\u5305\u91cd\u7ec4\u76f8\u5173\u77e5\u8bc6"},"content":{"rendered":"<p>\u56e0\u4e3a\u7f51\u7edc\u72b6\u6001\u3001\u534f\u8bae\u76f8\u5173\u7684\u56e0\u7d20\uff0c\u5927\u7684packet\u5728\u7f51\u7edc\u4e2d\u8fdb\u884c\u4f20\u8f93\u7684\u65f6\u5019\u4e0d\u53ef\u907f\u514d\u7684\u8981\u88ab\u8fdb\u884c\u5206\u7ec4\u5207\u7247\uff0c\u5f53\u5230\u8fbe\u76ee\u7684\u5730\u7684\u65f6\u5019\u518d\u8fdb\u884c\u91cd\u7ec4\u4e4b\u540e\u4f20\u7ed9\u4e0a\u5c42\u8fdb\u884c\u5904\u7406\u3002\u5176\u4e2d\u8fd9\u91cd\u7ec4\u7684\u8fc7\u7a0b\u662f\u4e2a\u5173\u952e\uff0c\u7279\u522b\u662f\u5728\u8981\u81ea\u5df1\u8fdb\u884c\u6293\u5305\u55c5\u63a2\u3001\u5206\u6790\u7684\u65f6\u5019\u3002<\/p>\n<p>\u4e0b\u9762\u5148\u7ed9\u51fa\u51e0\u4e2a\u53c2\u8003\u94fe\u63a5\uff0c\u6709\u65f6\u95f4\u4e86\uff08\u51c6\u786e\u7684\u8bf4\u5e94\u8be5\u662f\u6211\u5f04\u61c2\u4e86`(*\u2229_\u2229*)\u2032\uff09\u4e4b\u540e\uff0c\u6211\u518d\u6765\u597d\u597d\u5199\u5199\u8fd9\u65b9\u9762\u7684\u7ecf\u9a8c\uff1a<\/p>\n<h6>1.\u5148\u770b\u4e00\u4e2a\u7528Wireshark\u8fdb\u884c\u6293\u5305\u7684\u5b9e\u9645\u60c5\u51b5<\/h6>\n<p><a href=\"http:\/\/ixyzero.com\/blog\/wp-content\/uploads\/2014\/12\/tcp_segments_.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1653\" src=\"http:\/\/ixyzero.com\/blog\/wp-content\/uploads\/2014\/12\/tcp_segments_.png\" alt=\"tcp_segments_\" width=\"1364\" height=\"706\" \/><\/a><\/p>\n<h6>2.\u5176\u4e2d\u7684\u201cTCP segment of a reassembled PDU\u201d\u662f\u4ec0\u4e48\u610f\u601d\uff1f<\/h6>\n<p><a href=\"http:\/\/blog.csdn.net\/rossini23\/article\/details\/5424850\" target=\"_blank\">wireshark\u91cc\u7684\u201cTCP segment of a reassembled PDU\u201d<\/a><\/p>\n<p><a href=\"http:\/\/wenku.baidu.com\/link?url=9pOTIGGejGM7AIUTgDMocu-joaw46t5pP1-SP9pFVU2Xs5TVgtCOpOlRwyhRuLINW_JOlVB1tKlEEhm1zqUwJw5mfK9yPldpfbEWDYM1zYu\" target=\"_blank\">\u6293\u5305\u4e13\u5bb6\u7cfb\u7edf\u63d0\u793a_\u767e\u5ea6\u6587\u5e93<\/a><\/p>\n<p>\u603b\u800c\u8a00\u4e4b\u4e00\u53e5\u8bdd\uff1a\u7531TCP\u7684MSS(Maximum Segment Size\uff0c\u6700\u5927\u62a5\u6587\u6bb5\u957f\u5ea6)\u51b3\u5b9a\u4e00\u4e2a\u5927\u7684\u62a5\u6587\u5728\u5e95\u5c42\u4f20\u8f93\u65f6\u9700\u8981\u8fdb\u884c\u5206\u7247\u5904\u7406\u3002<\/p>\n<p>\u90a3\u5728\u6536\u5230\u4e00\u4e2a\u62a5\u6587\u540e\u5982\u4f55\u786e\u5b9a\u5b83\u662f\u4e00\u4e2a&#8221;TCP segment&#8221;\uff1f\u5982\u679c\u6709\u51e0\u4e2a\u62a5\u6587\u7684ACK\u5e8f\u53f7\u90fd\u4e00\u6837\uff0c\u5e76\u4e14\u8fd9\u4e9b\u62a5\u6587\u7684Sequence Number\u90fd\u4e0d\u4e00\u6837\uff0c\u5e76\u4e14\u540e\u4e00\u4e2aSequence Number\u4e3a\u524d\u4e00\u4e2aSequence Number\u52a0\u4e0a\u524d\u4e00\u4e2a\u62a5\u6587\u5927\u5c0f\u518d\u52a0\u4e0a1\u7684\u8bdd\uff0c\u80af\u5b9a\u662fTCP segment\u4e86\uff0c\u5bf9\u4e8e\u6ca1\u6709ACK\u6807\u5fd7\u65f6\uff0c\u5219\u65e0\u6cd5\u5224\u65ad\u3002<\/p>\n<h6>3.\u76f8\u5173\u8bf4\u660e\/\u8ba8\u8bba<\/h6>\n<p><a href=\"http:\/\/www.ii.uib.no\/~magnus\/TCP-6.html\" target=\"_blank\">Packet splitting and reassembly<\/a><\/p>\n<p><a href=\"http:\/\/superuser.com\/questions\/204861\/why-a-single-tcp-packet-gets-split-to-multiple-pdu-units-here\" target=\"_blank\">tcpip &#8211; Why a single(?) TCP packet gets split to multiple PDU units here? &#8211; Super User<\/a><\/p>\n<p><a href=\"http:\/\/blog.sina.com.cn\/s\/blog_48eef8410100b1gw.html\" target=\"_blank\">TCP\u6570\u636e\u5305\u91cd\u7ec4\u5b9e\u73b0\u5206\u6790<\/a><\/p>\n<p><a href=\"http:\/\/wiki.wireshark.org\/TCP_Reassembly\" target=\"_blank\">TCP_Reassembly &#8211; The Wireshark Wiki<\/a><\/p>\n<p><a href=\"http:\/\/www.sans.org\/reading-room\/whitepapers\/detection\/ip-fragment-reassembly-scapy-33969\" target=\"_blank\">http:\/\/www.sans.org\/reading-room\/whitepapers\/detection\/ip-fragment-reassembly-scapy-33969<\/a><\/p>\n<h6>4.\u5f85\u7eed<\/h6>\n<p>\u2026\u2026<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u56e0\u4e3a\u7f51\u7edc\u72b6\u6001\u3001\u534f\u8bae\u76f8\u5173\u7684\u56e0\u7d20\uff0c\u5927\u7684packet\u5728\u7f51\u7edc\u4e2d\u8fdb\u884c\u4f20\u8f93\u7684\u65f6\u5019\u4e0d\u53ef\u907f\u514d\u7684\u8981\u88ab\u8fdb\u884c\u5206\u7ec4\u5207\u7247\uff0c\u5f53\u5230\u8fbe\u76ee\u7684\u5730\u7684 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[412,103],"class_list":["post-1652","post","type-post","status-publish","format-standard","hentry","category-knowledgebase-2","tag-reassembly","tag-wireshark"],"views":3839,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/1652","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/comments?post=1652"}],"version-history":[{"count":0,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/1652\/revisions"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=1652"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=1652"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=1652"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}