{"id":104514,"date":"2022-06-27T15:36:43","date_gmt":"2022-06-27T13:36:43","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/wifibox-0-10-okruzhenie-dlya-ispolzovaniya-wifi-drajverov-linux-vo-freebsd"},"modified":"2022-06-27T15:36:43","modified_gmt":"2022-06-27T13:36:43","slug":"wifibox-0-10-okruzhenie-dlya-ispolzovaniya-wifi-drajverov-linux-vo-freebsd","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/wifibox-0-10-okruzhenie-dlya-ispolzovaniya-wifi-drajverov-linux-vo-freebsd","title":{"rendered":"Wifibox 0.10 \u2014 milj\u00f8 til brug af WiFi-drivere i Linux p\u00e5 FreeBSD","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Udgaven af Wifibox-projektet 0.10 er tilg\u00e6ngelig og sigter mod at l\u00f8se problemet med brugen af tr\u00e5dl\u00f8se adapters i FreeBSD, som ikke har de n\u00f8dvendige drivere. Drift af de problematiske adapters for FreeBSD sikres ved at k\u00f8re et g\u00e6stesystem med Linux, hvor de oprindelige Linux-drivere til tr\u00e5dl\u00f8se enheder indl\u00e6ses. <\/p>\n

Installation af g\u00e6stesystemet med drivere er automatiseret, og alle n\u00f8dvendige komponenter er samlet i en klar pakke, wifibox, der startes ved opstart ved hj\u00e6lp af den medf\u00f8lgende rc-service. Systemet h\u00e5ndterer ogs\u00e5 korrekt overgangen til hvilemodus. Omgivelserne kan potentielt anvendes til alle WiFi-kort, der underst\u00f8ttes i Linux, men er hovedsageligt testet p\u00e5 Intel-chips. Derudover er korrekt drift blevet testet p\u00e5 systemer med Qualcomm Atheros og AMD RZ608 (MediaTek MT7921K) tr\u00e5dl\u00f8se chips. <\/p>\n

G\u00e6stesystemet starter ved hj\u00e6lp af hypervisoren Bhyve, hvor adgangen til det tr\u00e5dl\u00f8se kort videref\u00f8res. For at det fungerer, kr\u00e6ves et system med underst\u00f8ttelse af hardwarevirtualisering (AMD-Vi eller Intel VT-d). G\u00e6stesystemet er baseret p\u00e5 Alpine Linux-distributionen, der er bygget p\u00e5 systembiblioteket Musl og et s\u00e6t v\u00e6rkt\u00f8jer fra BusyBox. St\u00f8rrelsen af billedet optager cirka 30 MB p\u00e5 disken og bruger omkring 90 MB RAM. <\/p>\n

For at oprette forbindelse til det tr\u00e5dl\u00f8se netv\u00e6rk bruges wpa_supplicant-pakken, hvis konfigurationsfiler synkroniseres med indstillingerne fra det prim\u00e6re FreeBSD-milj\u00f8. Den skabte wpa_supplicant Unix-socket videresendes til v\u00e6rtsmilj\u00f8et, hvilket g\u00f8r det muligt at bruge de standardv\u00e6rkt\u00f8jer, som FreeBSD tilbyder, til at tilslutte og arbejde med det tr\u00e5dl\u00f8se netv\u00e6rk; herunder kan der bruges v\u00e6rkt\u00f8jer som wpa_cli og wpa_gui (net\/wpa_supplicant_gui). <\/p>\n

I den nye version er mekanismen til at videref\u00f8re WPA til det prim\u00e6re milj\u00f8 blevet revideret, hvilket muligg\u00f8r drift med b\u00e5de wpa_supplicant og hostapd. Kravene til g\u00e6stesystemets hukommelse er reduceret. Underst\u00f8ttelsen af FreeBSD 13.0-RELEASE er stoppet. <\/p>\n

Derudover kan der n\u00e6vnes arbejdet med at forbedre de drivere, der tilbydes i FreeBSD til tr\u00e5dl\u00f8se kort baseret p\u00e5 Intel- og Realtek-chips. Med st\u00f8tte fra FreeBSD Foundation forts\u00e6tter udviklingen af den nye driver iwlwifi, som er inkluderet i FreeBSD 13.1. Driveren er baseret p\u00e5 Linux-driveren og koden fra Linux-net80211-systemet, underst\u00f8tter standarden 802.11ac og kan bruges med nye tr\u00e5dl\u00f8se Intel-chips. Driveren indl\u00e6ses automatisk under boot, n\u00e5r den relevante tr\u00e5dl\u00f8se kort registreres. Funktionaliteten af de tr\u00e5dl\u00f8se komponenter i Linux-stakken sikres ved hj\u00e6lp af lagdelt LinuxKPI. Tidligere blev en lignende driver, iwm, portet til FreeBSD. <\/p>\n

Samtidig er udviklingen af drivere til Realtek-tr\u00e5dl\u00f8se chips RTW88 og RTW89, rtw88 og rtw89, begyndt, som ogs\u00e5 udvikles ved at overf\u00f8re de relevante drivere fra Linux og fungerer ved hj\u00e6lp af lagdelt LinuxKPI. Driveren rtw88 er allerede klar til indledende test, mens driveren rtw89 stadig er under udvikling. <\/p>\n

Desuden kan der n\u00e6vnes offentligg\u00f8relsen af detaljer og en f\u00e6rdig exploit relateret til s\u00e5rbarheden (CVE-2022-23088) i FreeBSD's tr\u00e5dl\u00f8se stak, som blev rettet i april-opdateringen. S\u00e5rbarheden tillader k\u00f8rsel af brugerdefineret kode p\u00e5 kernel-niveau ved at sende et specielt formateret frame, mens en klient er i netv\u00e6rksskanningstilstand (f\u00f8r tilknytning af SSID). Problemet skyldes en bufferoverl\u00f8b i funktionen ieee80211_parse_beacon() under analysen af beacon-frames sendt af adgangspunktet. Overl\u00f8bet blev muligt p\u00e5 grund af manglende kontrol for overensstemmelse mellem den faktiske datast\u00f8rrelse og st\u00f8rrelsen angivet i headerfeltet. Problemet er til stede i versioner af FreeBSD, der er blevet udgivet siden 2009.

\"Wifibox<\/center> <\/p>\n

Blandt de seneste \u00e6ndringer i FreeBSD, der ikke er relateret til den tr\u00e5dl\u00f8se stak: der er blevet optimeret boot-tid, som p\u00e5 testsystemet blev reduceret fra 10 til 8 sekunder; GEOM-modulet gunion er implementeret for at overf\u00f8re \u00e6ndringer, der foretages over en disk, til en anden disk, som er tilg\u00e6ngelig i kun-l\u00e6se-tilstand; for kernelens crypto API er der forberedt kryptografiske primitive XChaCha20-Poly1305 AEAD og curve25519, som er n\u00f8dvendige for driveren. VPN<\/a> WireGuard.
\n
Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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