{"id":32586,"date":"2019-10-31T21:47:51","date_gmt":"2019-10-31T18:47:51","guid":{"rendered":"https:\/\/prohoster.info\/blog\/kompaniya-cloudflare-opublikovala-xdpcap-analizator-trafika-na-osnove-podsistemy-xdp\/"},"modified":"2019-10-31T21:47:51","modified_gmt":"2019-10-31T18:47:51","slug":"kompaniya-cloudflare-opublikovala-xdpcap-analizator-trafika-na-osnove-podsistemy-xdp","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/kompaniya-cloudflare-opublikovala-xdpcap-analizator-trafika-na-osnove-podsistemy-xdp","title":{"rendered":"Compania Cloudflare a publicat xdpcap, un analizator de trafic bazat pe subsistemul XDP","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Compania Cloudflare a prezentat<\/a><\/noindex> proiect deschis xdpcap<\/a><\/noindex>, \u00een cadrul c\u0103ruia se dezvolt\u0103 un analizator de pachete de re\u021bea asem\u0103n\u0103tor cu tcpdump, construit pe baza subsistemului XDP<\/a><\/noindex> (eXpress Data Path). Codul proiectului este scris \u00een limbajul Go \u0219i se r\u0103sp\u00e2nde\u0219te<\/a><\/noindex> sub licen\u021ba BSD. Proiectul include de asemenea a fost preg\u0103tit\u0103<\/a><\/noindex> o bibliotec\u0103 pentru legarea handler-elor eBPF de trafic din aplica\u021bii scrise \u00een Go.<\/p>\n

Utilitarul xdpcap este compatibil cu expresiile de filtrare tcpdump\/libpcap \u0219i permite procesarea unor volume semnificativ mai mari de trafic pe acela\u0219i echipament. Xdpcap poate fi utilizat \u0219i pentru depanare \u00een condi\u021bii \u00een care tcpdump obi\u0219nuit nu poate fi folosit, de exemplu, atunci c\u00e2nd sunt aplicate sisteme de filtrare, protec\u021bie \u00eempotriva atacurilor DoS \u0219i echilibrarea \u00eenc\u0103rc\u0103rii, care utilizeaz\u0103 subsistemul XDP al nucleului Linux, proces\u00e2nd pachetele \u00eenainte de a fi gestionate de stiva de re\u021bea a nucleului Linux (tcpdump nu vede pachetele eliminate de handler-ul XDP).<\/p>\n

Performan\u021ba ridicat\u0103 este ob\u021binut\u0103 datorit\u0103 utiliz\u0103rii subsistemelor eBPF \u0219i XDP. eBPF este un interpret de bytecode \u00eencorporat \u00een nucleul Linux, permi\u021b\u00e2nd crearea de handler-e de pachete de intrare\/ie\u0219ire de \u00eenalt\u0103 performan\u021b\u0103 prin luarea deciziilor de redirec\u021bionare sau eliminare a acestora. Prin intermediul compilatorului JIT, bytecode-ul eBPF este transformat \u00een instruc\u021biuni de ma\u0219in\u0103 \u0219i executat cu performan\u021ba codului nativ. Subsistemul XDP (eXpress Data Path) completeaz\u0103 eBPF cu capacitatea de a rula programe BPF la nivelul driver-ului de re\u021bea, oferind suport pentru acces direct la buffer-ul DMA al pachetelor \u0219i func\u021bion\u00e2nd \u00eenainte de alocarea buffer-ului skbuff de c\u0103tre stiva de re\u021bea.<\/p>\n

Ca \u0219i tcpdump, utilitarul xdpcap transform\u0103 ini\u021bial regulile de filtrare a traficului la un nivel \u00eenalt \u00een reprezentarea clasic\u0103 BPF (cBPF) folosind biblioteca standard libpcap, dup\u0103 care le transform\u0103 \u00een forma subprogramelor eBPF, folosind compilatorul cbpfc<\/a><\/noindex>, utiliz\u00e2nd dezvolt\u0103rile LLVM\/Clang. La ie\u0219ire, informa\u021biile despre trafic sunt salvate \u00een formatul standard pcap, ceea ce permite utilizarea dump-ului de trafic preg\u0103tit \u00een xdpcap pentru studii ulterioare \u00een tcpdump \u0219i alte analizoare de trafic existente. De exemplu, pentru a captura informa\u021bii despre traficul DNS, \u00een loc de comanda \u00abtcpdump ip and udp port 53\u00bb, se poate rula \u00abxdpcap \/path\/to\/hook capture.pcap 'ip and udp port 53'\u00bb, dup\u0103 care se poate utiliza fi\u0219ierul capture.pcap, de exemplu, cu comanda \u00abtcpdump -r\u00bb sau \u00een Wireshark.<\/p>\n

<\/a><\/noindex><\/p>\n

Sursa: opennet.ro<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Cloudflare \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0430 \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u0439 \u043f\u0440\u043e\u0435\u043a\u0442 xdpcap, \u0432 \u0440\u0430\u043c\u043a\u0430\u0445 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u043f\u043e\u0445\u043e\u0436\u0438\u0439 \u043d\u0430 tcpdump \u0430\u043d\u0430\u043b\u0438\u0437\u0430\u0442\u043e\u0440 \u0441\u0435\u0442\u0435\u0432\u044b\u0445 \u043f\u0430\u043a\u0435\u0442\u043e\u0432, \u043f\u043e\u0441\u0442\u0440\u043e\u0435\u043d\u043d\u044b\u0439 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u044b XDP (eXpress Data Path). \u041a\u043e\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 Go \u0438 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 BSD. \u041f\u0440\u043e\u0435\u043a\u0442\u043e\u043c \u0442\u0430\u043a\u0436\u0435 \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d\u0430 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 \u0434\u043b\u044f \u043f\u0440\u0438\u0432\u044f\u0437\u043a\u0438 eBPF-\u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 \u0442\u0440\u0430\u0444\u0438\u043a\u0430 \u0438\u0437 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 Go. \u0423\u0442\u0438\u043b\u0438\u0442\u0430 xdpcap \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u0430 \u0441 \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u044f\u043c\u0438 \u0444\u0438\u043b\u044c\u0442\u0440\u0430\u0446\u0438\u0438 tcpdump\/libpcap […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-32586","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Compania Cloudflare a publicat xdpcap, un analizator de trafic bazat pe subsistemul XDP | ProHoster","description":"Compania Cloudflare a lansat un proiect deschis","canonical_url":"https:\/\/prohoster.info\/ro\/blog\/news\/kompaniya-cloudflare-opublikovala-xdpcap-analizator-trafika-na-osnove-podsistemy-xdp","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"ro_RO","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Cloudflare \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0430 xdpcap, \u0430\u043d\u0430\u043b\u0438\u0437\u0430\u0442\u043e\u0440 \u0442\u0440\u0430\u0444\u0438\u043a\u0430 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u044b XDP | ProHoster","og:description":"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Cloudflare \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0430 \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u0439 \u043f\u0440\u043e\u0435\u043a\u0442","og:url":"https:\/\/prohoster.info\/ro\/blog\/news\/kompaniya-cloudflare-opublikovala-xdpcap-analizator-trafika-na-osnove-podsistemy-xdp","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2019-10-31T18:47:51+00:00","article:modified_time":"2019-10-31T18:47:51+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"32586","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":null,"schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":"2026-01-21 11:37:20","breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-03-01 02:56:29","updated":"2026-01-21 11:37:20","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/posts\/32586","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/comments?post=32586"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/posts\/32586\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/media?parent=32586"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/categories?post=32586"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/tags?post=32586"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}