{"id":93570,"date":"2020-09-07T19:42:05","date_gmt":"2020-09-07T17:42:05","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-libtorrent-2-0-s-podderzhkoj-protokola-bittorrent-2"},"modified":"2020-09-07T19:42:05","modified_gmt":"2020-09-07T17:42:05","slug":"vypusk-libtorrent-2-0-s-podderzhkoj-protokola-bittorrent-2","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/vypusk-libtorrent-2-0-s-podderzhkoj-protokola-bittorrent-2","title":{"rendered":"A libtorrent 2.0 kiad\u00e1s a BitTorrent 2 protokoll t\u00e1mogat\u00e1s\u00e1val","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Bemutatva<\/a><\/noindex> jelent\u0151s kiad\u00e1s a k\u00f6nyvt\u00e1rb\u00f3l libtorrent 2.0<\/a><\/noindex> (m\u00e1s n\u00e9ven libtorrent-rasterbar), amely a BitTorrent protokoll megval\u00f3s\u00edt\u00e1s\u00e1t k\u00edn\u00e1lja, hat\u00e9kony mem\u00f3riakezel\u00e9ssel \u00e9s CPU-terhel\u00e9ssel. A k\u00f6nyvt\u00e1r akt\u00edv<\/a><\/noindex> olyan torrent kliens programokban, mint Deluge<\/a><\/noindex>, qBittorrent<\/a><\/noindex>, Folx<\/a><\/noindex>, Lince<\/a><\/noindex>, Miro<\/a><\/noindex> \u00e9s Flush<\/a><\/noindex> (ne keverd \u00f6ssze a m\u00e1sik k\u00f6nyvt\u00e1rral, libtorrent<\/a><\/noindex>, amely az rTorrentben haszn\u00e1latos). A libtorrent k\u00f3dja C++ nyelven \u00edr\u00f3dott, \u00e9s terjeszt\u00e9sre ker\u00fcl<\/a><\/noindex> BSD licenc alatt.<\/p>\n

A kiad\u00e1s figyelemre m\u00e9lt\u00f3 az<\/a><\/noindex> protokoll t\u00e1mogat\u00e1s\u00e1nak BitTorrent v2<\/a><\/noindex>, amelyben elhagyt\u00e1k a SHA-1 algoritmus haszn\u00e1lat\u00e1t, amely probl\u00e9ma<\/a><\/noindex> a SHA2-256 \u00fctk\u00f6z\u00e9sek kiv\u00e1laszt\u00e1s\u00e1val. A SHA2-256-ot a adatblokkok integrit\u00e1s\u00e1nak ellen\u0151rz\u00e9s\u00e9re \u00e9s az indexbejegyz\u00e9sekhez (info-dictionary) is haszn\u00e1lj\u00e1k, ami megs\u00e9rti a DHT \u00e9s a tracker kompatibilit\u00e1s\u00e1t. A SHA2-256 hash-\u0171 torrent m\u00e1gneslinkekhez egy \u00faj prefixet javasoltak: «urn:btmh:» (SHA-1 \u00e9s hibrid torrentekhez «urn:btih:» haszn\u00e1latos).<\/p>\n

Mivel a hash-el\u00e9s funkci\u00f3 cser\u00e9je megszak\u00edtja a protokoll kompatibilit\u00e1s\u00e1t (a hash mez\u0151 32 b\u00e1jt helyett 20 b\u00e1jt), a BitTorrent v2 specifik\u00e1ci\u00f3j\u00e1nak kidolgoz\u00e1sa eredetileg nem figyelt a visszafel\u00e9 kompatibilit\u00e1s\u00e1ra, \u00e9s m\u00e1s l\u00e9nyeges v\u00e1ltoztat\u00e1sok is ker\u00fcltek bele, mint p\u00e9ld\u00e1ul a Merkle-f\u00e1t hivatkoz\u00f3 rendszerek haszn\u00e1lata az indexekben a torrent-f\u00e1jlok m\u00e9ret\u00e9nek cs\u00f6kkent\u00e9se \u00e9s a let\u00f6lt\u00f6tt adatok blokk szint\u0171 ellen\u0151rz\u00e9s\u00e9re.<\/p>\n

A BitTorrent v2 \u00faj\u00edt\u00e1sa k\u00f6z\u00f6tt megeml\u00edthetj\u00fck a k\u00fcl\u00f6n hiba-f\u00e1k minden f\u00e1jlhoz val\u00f3 k\u00f6t\u00e9s\u00e9t \u00e9s a f\u00e1jlok r\u00e9szleges igaz\u00edt\u00e1s\u00e1nak alkalmaz\u00e1s\u00e1t (an\u00e9lk\u00fcl, hogy a f\u00e1jlok ut\u00e1n felesleges kit\u00f6lt\u00e9st adtunk volna hozz\u00e1), ami lehet\u0151v\u00e9 teszi az azonos f\u00e1jlok adatainak duplik\u00e1l\u00e1s\u00e1nak megsz\u00fcntet\u00e9s\u00e9t \u00e9s el\u0151seg\u00edti a k\u00fcl\u00f6nb\u00f6z\u0151 forr\u00e1sok azonos\u00edt\u00e1s\u00e1t a f\u00e1jlokhoz. A torrent k\u00f6nyvt\u00e1rszerkezete k\u00f3dol\u00e1s\u00e1nak hat\u00e9konys\u00e1ga is n\u0151tt, \u00e9s optimaliz\u00e1l\u00e1sokat v\u00e9geztek a nagysz\u00e1m\u00fa kis f\u00e1jl kezel\u00e9s\u00e9re. <\/p>\n

A BitTorrent v1 \u00e9s v2 egy\u00fctt\u00e9l\u00e9s\u00e9nek sim\u00edt\u00e1s\u00e1ra megval\u00f3s\u00edtott\u00e1k a hibrid torrent f\u00e1jlok k\u00e9sz\u00edt\u00e9s\u00e9nek lehet\u0151s\u00e9g\u00e9t, amelyek a SHA-1 hash strukt\u00far\u00e1kon k\u00edv\u00fcl SHA2-256 indexeket is tartalmaznak.
\nA hibrid torrentek az olyan kliensekkel haszn\u00e1lhat\u00f3ak, amelyek csak a BitTorrent v1 protokollt t\u00e1mogatj\u00e1k. A libtorrent 2.0-ban v\u00e1rt WebTorrent protokoll t\u00e1mogat\u00e1s a megoldatlan stabilit\u00e1si probl\u00e9m\u00e1k miatt elhalasztva<\/a><\/noindex> a k\u00f6vetkez\u0151 jelent\u0151s kiad\u00e1sig, amely nem v\u00e1rhat\u00f3 kor\u00e1bban, mint az \u00e9v v\u00e9ge. <\/p>\n

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

Forr\u00e1s: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 libtorrent 2.0 (\u0438\u0437\u0432\u0435\u0441\u0442\u043d\u0430 \u0442\u0430\u043a\u0436\u0435 \u043a\u0430\u043a libtorrent-rasterbar), \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u044e\u0449\u0435\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 BitTorrent, \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u0443\u044e \u0441 \u0442\u043e\u0447\u043a\u0438 \u0437\u0440\u0435\u043d\u0438\u044f \u043f\u043e\u0442\u0440\u0435\u0431\u043b\u0435\u043d\u0438\u044f \u043f\u0430\u043c\u044f\u0442\u0438 \u0438 \u043d\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u043d\u0430 CPU. \u0411\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 \u0437\u0430\u0434\u0435\u0439\u0441\u0442\u0432\u043e\u0432\u0430\u043d\u0430 \u0432 \u0442\u0430\u043a\u0438\u0445 \u0442\u043e\u0440\u0440\u0435\u043d\u0442-\u043a\u043b\u0438\u0435\u043d\u0442\u0430\u0445, \u043a\u0430\u043a Deluge, qBittorrent, Folx, Lince, Miro \u0438 Flush (\u043d\u0435 \u043f\u0443\u0442\u0430\u0442\u044c \u0441 \u0434\u0440\u0443\u0433\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u043e\u0439 libtorrent, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u0432 rTorrent). \u041a\u043e\u0434 libtorrent \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 C++ \u0438 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f […]<\/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-93570","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\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\udd47A libtorrent 2.0 kiad\u00e1sa a BitTorrent 2 protokoll t\u00e1mogat\u00e1s\u00e1val | ProHoster","description":"Jelent\u0151s kiad\u00e1s jelent meg a libtorrent 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