{"id":79868,"date":"2020-05-01T07:42:17","date_gmt":"2020-05-01T05:42:17","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/microsoft-otkryl-svoyu-realizacziyu-protokola-quic-primenyaemogo-v-http-3"},"modified":"2020-05-01T07:42:17","modified_gmt":"2020-05-01T05:42:17","slug":"microsoft-otkryl-svoyu-realizacziyu-protokola-quic-primenyaemogo-v-http-3","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/microsoft-otkryl-svoyu-realizacziyu-protokola-quic-primenyaemogo-v-http-3","title":{"rendered":"Microsoft otworzy\u0142 swoj\u0105 implementacj\u0119 protoko\u0142u QUIC, u\u017cywanego w HTTP\/3","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Firma Microsoft <noindex><a rel=\"nofollow\" href=\"https:\/\/techcommunity.microsoft.com\/t5\/networking-blog\/msquic-is-open-source\/ba-p\/1345441\">og\u0142osi\u0142a<\/a><\/noindex> o otwarciu kodu biblioteki <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/microsoft\/msquic\">MsQuic<\/a><\/noindex> z realizacj\u0105 protoko\u0142u sieciowego <noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/draft-ietf-quic-transport\">QUIC<\/a><\/noindex>. Kod napisano w j\u0119zyku C i <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/microsoft\/msquic\">rozpowszechniany<\/a><\/noindex> na licencji MIT. Biblioteka jest wieloplatformowa i mo\u017ce by\u0107 u\u017cywana nie tylko w systemie Windows, ale r\u00f3wnie\u017c w systemie Linux z wykorzystaniem <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.microsoft.com\/en-us\/windows\/win32\/com\/schannel\">Schannel<\/a><\/noindex> lub OpenSSL dla TLS 1.3. W przysz\u0142o\u015bci planowane jest wsparcie dla innych platform.<\/p>\n<p>Biblioteka oparta jest na kodzie sterownika msquic.sys, dostarczanego w j\u0105drze Windows 10 (Insider Preview) w celu zapewnienia obs\u0142ugi protoko\u0142\u00f3w HTTP i <noindex><a rel=\"nofollow\" href=\"https:\/\/techcommunity.microsoft.com\/t5\/itops-talk-blog\/smb-over-quic-files-without-the-vpn\/ba-p\/1183449\">SMB<\/a><\/noindex> na QUIC. W tym kod u\u017cywany jest do implementacji HTTP\/3 w wewn\u0119trznym stosie Windows i w .NET Core. Rozw\u00f3j biblioteki MsQuic b\u0119dzie ca\u0142kowicie prowadzony na GitHubie z wykorzystaniem publicznego przegl\u0105du, pull-request\u00f3w i GitHub Issues. Przygotowana zosta\u0142a infrastruktura, kt\u00f3ra sprawdza ka\u017cdy commit i pull-request w zestawie ponad 4000 test\u00f3w. Po stabilizacji \u015brodowiska do rozwoju planowane jest przyjmowanie zmian od zewn\u0119trznych programist\u00f3w.<\/p>\n<p>MsQuic ju\u017c mo\u017cna wykorzysta\u0107 do tworzenia serwer\u00f3w i klient\u00f3w, ale nie wszystkie funkcjonalno\u015bci okre\u015blone w specyfikacji IETF s\u0105 obecnie dost\u0119pne. Na przyk\u0142ad, obecnie brak wsparcia dla 0-RTT, migracji klient\u00f3w, odkrywania Path MTU oraz zarz\u0105dzania wyborem adres\u00f3w dla serwera (Server Preferred Address). W\u015br\u00f3d zaimplementowanych funkcji zauwa\u017cono optymalizacj\u0119 w celu osi\u0105gni\u0119cia maksymalnej przepustowo\u015bci i minimalnych op\u00f3\u017anie\u0144, wsparcie dla asynchronicznego wej\u015bcia\/wyj\u015bcia, RSS (Receive Side Scaling), a tak\u017ce mo\u017cliwo\u015b\u0107 \u0142\u0105czenia przychodz\u0105cych i wychodz\u0105cych strumieni UDP. Implementacja MsQuic zosta\u0142a przetestowana pod k\u0105tem zgodno\u015bci z eksperymentalnymi ga\u0142\u0119ziami przegl\u0105darek Chrome i Edge.<\/p>\n<p>Przypomnijmy, \u017ce HTTP\/3 standaryzuje u\u017cycie protoko\u0142u QUIC jako transportu dla HTTP\/2. Protok\u00f3\u0142 <noindex><a rel=\"nofollow\" href=\"https:\/\/www.chromium.org\/quic\/\">QUIC<\/a><\/noindex> (Quick UDP Internet Connections) od 2013 roku jest rozwijany przez firm\u0119 Google jako alternatywa dla po\u0142\u0105cze\u0144 TCP+TLS w sieci, rozwi\u0105zuj\u0105c problemy z d\u0142ugim czasem ustanawiania i uzgadniania po\u0142\u0105cze\u0144 w TCP oraz eliminuj\u0105c op\u00f3\u017anienia przy utracie pakiet\u00f3w w trakcie przesy\u0142ania danych. QUIC jest nadbudow\u0105 nad protoko\u0142em UDP, wspieraj\u0105c\u0105 mno\u017cenie po\u0142\u0105cze\u0144 i zapewniaj\u0105c\u0105 metody szyfrowania por\u00f3wnywalne z TLS\/SSL. <\/p>\n<p>Podstawowe <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.google.com\/document\/d\/1lmL9EF6qKrk7gbazY8bIdvq3Pno2Xj_l_YShP40GLQE\/preview?sle=true#\">cechy<\/a><\/noindex> QUIC:\n<\/p>\n<ul>\n<li class=\"l\"> Wysokie bezpiecze\u0144stwo, podobne do TLS (w zasadzie QUIC umo\u017cliwia u\u017cywanie TLS 1.3 na UDP);\n<\/li>\n<li class=\"l\"> Kontrola integralno\u015bci strumienia, zapobiegaj\u0105ca utracie pakiet\u00f3w;\n<\/li>\n<li class=\"l\"> Mo\u017cliwo\u015b\u0107 natychmiastowego ustanowienia po\u0142\u0105czenia (0-RTT, w oko\u0142o 75% przypadk\u00f3w dane mo\u017cna przesy\u0142a\u0107 natychmiast po wys\u0142aniu pakietu ustanowienia po\u0142\u0105czenia) oraz zapewnienie minimalnych op\u00f3\u017anie\u0144 mi\u0119dzy wys\u0142aniem \u017c\u0105dania a otrzymaniem odpowiedzi (RTT, Round Trip Time);<br \/>\n<center><noindex><a rel=\"nofollow\" href=\"https:\/\/lh3.googleusercontent.com\/o62Ohn1Ppxna6zz0NtavqRyetjryOj-81Sz4bRt3U8lURVblk5RKOaCcf57i6BkmprremePJpq_sQcxfJiuA4wJBmRp3pR4BS1P-yiT6UNUPvnBeP_rLz9bvHxFE15kuNBM2hpE?a.png\"><img decoding=\"async\" alt=\"Microsoft otworzy\u0142 swoj\u0105 implementacj\u0119 protoko\u0142u QUIC, u\u017cywanego w HTTP\/3\" src=\"\/wp-content\/uploads\/2020\/05\/1cdf7d0f9fe23fbbdc72416d51adebfe.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<\/li>\n<li class=\"l\"> Nie u\u017cywanie tego samego numeru sekwencji podczas ponownej transmisji pakietu, co pozwala unikn\u0105\u0107 dwuznaczno\u015bci przy okre\u015blaniu odebranych pakiet\u00f3w i wyeliminowa\u0107 op\u00f3\u017anienia;\n<\/li>\n<li class=\"l\"> Utrata pakietu wp\u0142ywa na dostarczanie tylko powi\u0105zanego z nim strumienia i nie zatrzymuje dostarczania danych w r\u00f3wnolegle przesy\u0142anych strumieniach przez bie\u017c\u0105ce po\u0142\u0105czenie;\n<\/li>\n<li class=\"l\"> \u015arodki korekcji b\u0142\u0119d\u00f3w, minimalizuj\u0105ce op\u00f3\u017anienia spowodowane ponown\u0105 transmisj\u0105 zagubionych pakiet\u00f3w. Wykorzystanie specjalnych kod\u00f3w korekcji b\u0142\u0119d\u00f3w na poziomie pakiet\u00f3w w celu zmniejszenia liczby sytuacji wymagaj\u0105cych ponownej transmisji danych zagubionego pakietu.\n<\/li>\n<li class=\"l\"> Granice blok\u00f3w kryptograficznych s\u0105 wyr\u00f3wnane z granicami pakiet\u00f3w QUIC, co zmniejsza wp\u0142yw utraty pakiet\u00f3w na dekodowanie zawarto\u015bci nast\u0119pnych pakiet\u00f3w;\n<\/li>\n<li class=\"l\"> Brak problem\u00f3w z blokowaniem kolejek TCP;\n<\/li>\n<li class=\"l\"> Wsparcie dla identyfikatora po\u0142\u0105czenia, co pozwala skr\u00f3ci\u0107 czas na ponowne nawi\u0105zanie po\u0142\u0105czenia dla klient\u00f3w mobilnych;\n<\/li>\n<li class=\"l\"> Mo\u017cliwo\u015b\u0107 pod\u0142\u0105czenia rozszerzonych mechanizm\u00f3w kontroli przeci\u0105\u017cenia po\u0142\u0105czenia;\n<\/li>\n<li class=\"l\"> Wykorzystanie techniki prognozowania przepustowo\u015bci w ka\u017cdym kierunku, aby zapewni\u0107 optymaln\u0105 intensywno\u015b\u0107 wysy\u0142ania pakiet\u00f3w, zapobiegaj\u0105c wpadni\u0119ciu w stan przeci\u0105\u017cenia, w kt\u00f3rym wyst\u0119puje utrata pakiet\u00f3w;\n<\/li>\n<li class=\"l\">  Wyra\u017any <noindex><a rel=\"nofollow\" href=\"http:\/\/web.cs.wpi.edu\/~claypool\/ms\/quic\/quic-thesis.pdf\">wzrost<\/a><\/noindex> wydajno\u015bci i przepustowo\u015bci w por\u00f3wnaniu z TCP. Dla serwis\u00f3w wideo, takich jak YouTube, zastosowanie QUIC wykaza\u0142o zmniejszenie operacji ponownego buforowania podczas ogl\u0105dania wideo o 30%.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>\u0179r\u00f3d\u0142o: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52844\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Microsoft \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0430 \u043e\u0431 \u043e\u0442\u043a\u0440\u044b\u0442\u0438\u0438 \u043a\u043e\u0434\u0430 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 MsQuic \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u0441\u0435\u0442\u0435\u0432\u043e\u0433\u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 QUIC. \u041a\u043e\u0434 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 \u0421\u0438 \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 MIT. \u0411\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 \u043a\u0440\u043e\u0441\u0441\u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0435\u043d\u043d\u0430\u044f \u0438 \u043c\u043e\u0436\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u043d\u0435 \u0442\u043e\u043b\u044c\u043a\u043e \u0432 Windows, \u043d\u043e \u0438 \u0432 Linux \u0441 \u0437\u0430\u0434\u0435\u0439\u0441\u0442\u0432\u043e\u0432\u0430\u043d\u0438\u0435\u043c Schannel \u0438\u043b\u0438 OpenSSL \u0434\u043b\u044f TLS 1.3. \u0412 \u0434\u0430\u043b\u044c\u043d\u0435\u0439\u0448\u0435\u043c \u043f\u043b\u0430\u043d\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u0438 \u0434\u0440\u0443\u0433\u0438\u0445 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c. \u0411\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u0430 \u043d\u0430 \u043a\u043e\u0434\u0435 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":79869,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-79868","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Microsoft \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0430 \u043e\u0431 \u043e\u0442\u043a\u0440\u044b\u0442\u0438\u0438 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