{"id":41690,"date":"2020-02-14T08:42:48","date_gmt":"2020-02-14T05:42:48","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/dostupen-usb-raw-gadget-linux-modul-dlya-emulyaczii-usb-ustrojstv"},"modified":"2020-02-14T08:42:48","modified_gmt":"2020-02-14T05:42:48","slug":"dostupen-usb-raw-gadget-linux-modul-dlya-emulyaczii-usb-ustrojstv","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/dostupen-usb-raw-gadget-linux-modul-dlya-emulyaczii-usb-ustrojstv","title":{"rendered":"Dostupn\u00fd USB Raw Gadget, Linuxov\u00fd modul pro emulaci USB za\u0159\u00edzen\u00ed","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Andrej Konovalov ze spole\u010dnosti Google vyv\u00edj\u00ed nov\u00fd modul USB Raw Gadget<\/a><\/noindex>, umo\u017e\u0148uj\u00edc\u00ed<\/a><\/noindex> emulovat USB za\u0159\u00edzen\u00ed v u\u017eivatelsk\u00e9m prostoru. Je pod\u00e1n k posouzen\u00ed \u017e\u00e1dost<\/a><\/noindex> o zahrnut\u00ed tohoto modulu do hlavn\u00edho j\u00e1dra Linuxu. USB Raw Gadget ji\u017e se pou\u017e\u00edv\u00e1<\/a><\/noindex> ve spole\u010dnosti Google pro zjednodu\u0161en\u00ed fuzzingov\u00e9ho testov\u00e1n\u00ed USB z\u00e1sobn\u00edku j\u00e1dra pomoc\u00ed n\u00e1stroj\u016f syzkaller<\/a><\/noindex>.<\/p>\n

Modul p\u0159id\u00e1v\u00e1 nov\u00e9 rozhran\u00ed do j\u00e1drov\u00e9 subsyst\u00e9mu USB Gadget<\/a><\/noindex> a je vyv\u00edjen jako alternativa k GadgetFS. Vytvo\u0159en\u00ed nov\u00e9ho API je d\u016fsledkem pot\u0159eby z\u00edsk\u00e1n\u00ed n\u00edzko\u00farov\u0148ov\u00e9ho a p\u0159\u00edm\u00e9ho p\u0159\u00edstupu k subsyst\u00e9mu USB Gadget z u\u017eivatelsk\u00e9ho prostoru, co\u017e umo\u017e\u0148uje zpracov\u00e1vat v\u0161echny mo\u017en\u00e9 USB po\u017eadavky (GadgetFS n\u011bkter\u00e9 po\u017eadavky zpracov\u00e1v\u00e1 samostatn\u011b, ani\u017e by je p\u0159ed\u00e1val do u\u017eivatelsk\u00e9ho prostoru). Spr\u00e1va USB Raw Gadget se prov\u00e1d\u00ed p\u0159es za\u0159\u00edzen\u00ed \/dev\/raw-gadget, podobn\u011b jako \/dev\/gadget v GadgetFS, ale pro interakci se pou\u017e\u00edv\u00e1 rozhran\u00ed zalo\u017een\u00e9 na ioctl(), nikoli na pseudo-FS.<\/p>\n

Krom\u011b p\u0159\u00edm\u00e9ho zpracov\u00e1n\u00ed v\u0161ech USB po\u017eadavk\u016f procesem v u\u017eivatelsk\u00e9m prostoru nov\u00e9 rozhran\u00ed tak\u00e9 umo\u017e\u0148uje vracet jak\u00e1koliv data jako odpov\u011b\u010f na USB po\u017eadavek (GadgetFS prov\u00e1d\u00ed kontrolu spr\u00e1vnosti USB popisova\u010d\u016f a filtruje ur\u010dit\u00e9 odpov\u011bdi, co\u017e zt\u011b\u017euje odhalov\u00e1n\u00ed chyb p\u0159i fuzzingov\u00e9m testov\u00e1n\u00ed USB z\u00e1sobn\u00edku). Raw Gadget tak\u00e9 umo\u017e\u0148uje vybrat konkr\u00e9tn\u00ed za\u0159\u00edzen\u00ed UDC (USB Device Controller) a ovlada\u010d pro p\u0159ipojen\u00ed, zat\u00edmco GadgetFS se p\u0159ipojuje k prvn\u00edmu dostupn\u00e9mu za\u0159\u00edzen\u00ed UDC. Pro r\u016fzn\u00e9 UDC se p\u0159i\u0159azuj\u00ed p\u0159edv\u00eddateln\u00e1 jm\u00e9na endpoint<\/a><\/noindex> pro rozli\u0161en\u00ed r\u016fzn\u00fdch typ\u016f datov\u00fdch kan\u00e1l\u016f uvnit\u0159 jednoho za\u0159\u00edzen\u00ed.<\/p>\n

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

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

\u0410\u043d\u0434\u0440\u0435\u0439 \u041a\u043e\u043d\u043e\u0432\u0430\u043b\u043e\u0432 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Google \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u0442 \u043d\u043e\u0432\u044b\u0439 \u043c\u043e\u0434\u0443\u043b\u044c USB Raw Gadget, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0439 \u044d\u043c\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u0442\u044c USB-\u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430 \u0432 \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f. \u041d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u043d\u0430 \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0435\u043d\u0438\u0438 \u0437\u0430\u044f\u0432\u043a\u0430 \u043d\u0430 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435 \u0434\u0430\u043d\u043d\u043e\u0433\u043e \u043c\u043e\u0434\u0443\u043b\u044f \u0432 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u0441\u043e\u0441\u0442\u0430\u0432 \u044f\u0434\u0440\u0430 Linux. USB Raw Gadget \u0443\u0436\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f \u0432 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Google \u0434\u043b\u044f \u0443\u043f\u0440\u043e\u0449\u0435\u043d\u0438\u044f fuzzing-\u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f USB-\u0441\u0442\u0435\u043a\u0430 \u044f\u0434\u0440\u0430 \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u044f syzkaller. \u041c\u043e\u0434\u0443\u043b\u044c \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u0442 \u043d\u043e\u0432\u044b\u0439 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u044b\u0439 \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441 \u0432 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0443 \u044f\u0434\u0440\u0430 […]<\/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":[],"tags":[],"class_list":["post-41690","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\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\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Dostupn\u00fd USB Raw Gadget, Linuxov\u00fd modul pro emulaci USB za\u0159\u00edzen\u00ed | ProHoster","description":"Andrej Konovalov ze spole\u010dnosti Google vyv\u00edj\u00ed nov\u00fd modul USB Raw 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