{"id":105254,"date":"2022-10-05T15:36:53","date_gmt":"2022-10-05T13:36:53","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vo-freebsd-dobavlena-podderzhka-protokola-netlink-primenyaemogo-v-yadre-linux"},"modified":"2022-10-05T15:36:53","modified_gmt":"2022-10-05T13:36:53","slug":"vo-freebsd-dobavlena-podderzhka-protokola-netlink-primenyaemogo-v-yadre-linux","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/vo-freebsd-dobavlena-podderzhka-protokola-netlink-primenyaemogo-v-yadre-linux","title":{"rendered":"Ve FreeBSD byla p\u0159id\u00e1na podpora protokolu Netlink pou\u017eit\u00e1 v j\u00e1d\u0159e Linuxu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Do k\u00f3du FreeBSD byla p\u0159ijata implementace komunika\u010dn\u00edho protokolu Netlink (RFC 3549), pou\u017e\u00edvan\u00e9ho v Linuxu k organizaci interakce j\u00e1dra s procesy v u\u017eivatelsk\u00e9m prostoru. Projekt se omezuje na podporu rodiny operac\u00ed NETLINK_ROUTE pro spr\u00e1vu stavu s\u00ed\u0165ov\u00e9ho subsyst\u00e9mu v j\u00e1d\u0159e. <\/p>\n

V sou\u010dasn\u00e9 podob\u011b \u00farove\u0148 podpory Netlink umo\u017e\u0148uje pou\u017e\u00edvat v FreeBSD linuxovou utilitu ip z bal\u00ed\u010dku iproute2 pro spr\u00e1vu s\u00ed\u0165ov\u00fdch rozhran\u00ed, nastavov\u00e1n\u00ed IP adres, konfiguraci sm\u011brov\u00e1n\u00ed a manipulaci s objekty nexthop, kter\u00e9 uchov\u00e1vaj\u00ed informace o stavu, pou\u017e\u00edvan\u00e9 pro p\u0159enos paketu na po\u017eadovan\u00e9 m\u00edsto ur\u010den\u00ed. Po drobn\u00fdch \u00faprav\u00e1ch hlavi\u010dkov\u00fdch soubor\u016f je mo\u017en\u00e9 pou\u017e\u00edt Netlink v bal\u00ed\u010dku sm\u011brov\u00e1n\u00ed Bird. <\/p>\n

Implementace Netlink pro FreeBSD je vytvo\u0159ena jako na\u010ditateln\u00fd modul j\u00e1dra, kter\u00fd se, kde to je mo\u017en\u00e9, nedot\u00fdk\u00e1 jin\u00fdch subsyst\u00e9m\u016f j\u00e1dra a vytv\u00e1\u0159\u00ed samostatn\u00e9 fronty \u00faloh (tasqueue) pro zpracov\u00e1n\u00ed p\u0159\u00edchoz\u00edch zpr\u00e1v protokolu a prov\u00e1d\u011bn\u00ed operac\u00ed v asynchronn\u00edm re\u017eimu. Jako d\u016fvod p\u0159enosu Netlink je uv\u00e1d\u011bna absence standardn\u00edho mechanismu pro interakci se subsyst\u00e9my j\u00e1dra, co\u017e vede k tomu, \u017ee r\u016fzn\u00e9 subsyst\u00e9my a ovlada\u010de vynal\u00e9zaj\u00ed vlastn\u00ed protokoly. <\/p>\n

Netlink nab\u00edz\u00ed jednotnou komunika\u010dn\u00ed vrstvu a roz\u0161i\u0159iteln\u00fd form\u00e1t zpr\u00e1v, kter\u00fd m\u016f\u017ee fungovat jako zprost\u0159edkovatel, automaticky kombinuj\u00edc\u00ed v jednom po\u017eadavku rozpt\u00fdlen\u00e1 data z r\u016fzn\u00fdch zdroj\u016f. Nap\u0159\u00edklad do Netlinku mohou b\u00fdt p\u0159evedeny takov\u00e9 subsyst\u00e9my FreeBSD, jako jsou devd, jail a pfilctl, kter\u00e9 nyn\u00ed pou\u017e\u00edvaj\u00ed sv\u00e9 vlastn\u00ed vol\u00e1n\u00ed ioctl, co\u017e v\u00fdrazn\u011b zjednodu\u0161\u00ed vytv\u00e1\u0159en\u00ed aplikac\u00ed pro pr\u00e1ci s t\u011bmito subsyst\u00e9my. Krom\u011b toho vyu\u017eit\u00ed Netlinku pro zm\u011bnu objekt\u016f a skupin nexthop v sm\u011brovac\u00edm stacku umo\u017en\u00ed efektivn\u011bj\u0161\u00ed interakci s procesy sm\u011brov\u00e1n\u00ed v u\u017eivatelsk\u00e9m prostoru. <\/p>\n

Realizovan\u00e9 v sou\u010dasn\u00e9 dob\u011b mo\u017enosti: <\/p>\n