{"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\/sk\/blog\/news\/vo-freebsd-dobavlena-podderzhka-protokola-netlink-primenyaemogo-v-yadre-linux","title":{"rendered":"Vo FreeBSD bola pridan\u00e1 podpora pre protokol Netlink, ktor\u00fd sa pou\u017e\u00edva v jadre Linuxu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"
Do k\u00f3dovej b\u00e1zy FreeBSD bola prijat\u00e1 implement\u00e1cia komunika\u010dn\u00e9ho protokolu Netlink (RFC 3549), ktor\u00fd sa pou\u017e\u00edva v Linuxe na organizovanie interakcie medzi jadrom a procesmi v pou\u017e\u00edvate\u013eskom priestore. Projekt je obmedzen\u00fd na podporu rodiny oper\u00e1ci\u00ed NETLINK_ROUTE na spr\u00e1vu stavu sie\u0165ovej subsyst\u00e9my v jadre. <\/p>\n
V s\u00fa\u010dasnej podobe \u00farove\u0148 podpory Netlink umo\u017e\u0148uje pou\u017e\u00edva\u0165 vo FreeBSD linuxov\u00fa utilitu ip z bal\u00edka iproute2 na spr\u00e1vu sie\u0165ov\u00fdch rozhran\u00ed, nastavenie IP adries, konfigur\u00e1ciu routovania a manipul\u00e1ciu s objektmi nexthop, ktor\u00e9 uchov\u00e1vaj\u00fa \u00fadaje o stave pou\u017e\u00edvanom na prenos paketov na po\u017eadovan\u00fd cie\u013e. Po drobn\u00fdch zmen\u00e1ch hlavi\u010dkov\u00fdch s\u00faborov je mo\u017en\u00e9 vyu\u017e\u00edva\u0165 Netlink v bal\u00edku routovania Bird. <\/p>\n
Implement\u00e1cia Netlinku pre FreeBSD je navrhnut\u00e1 ako na\u010d\u00edtate\u013en\u00fd modul jadra, ktor\u00fd sa pok\u00fa\u0161a minimalizova\u0165 z\u00e1sahy do in\u00fdch subsyst\u00e9mov jadra a vytv\u00e1ra samostatn\u00e9 fronty \u00faloh (tasqueue) na spracovanie prich\u00e1dzaj\u00facich spr\u00e1v pod\u013ea protokolu a vykon\u00e1vanie oper\u00e1ci\u00ed v asynchr\u00f3nnom re\u017eime. Ako d\u00f4vod portovania Netlinku sa uv\u00e1dza absencia \u0161tandardn\u00e9ho mechanizmu na interakciu s subsyst\u00e9mami jadra, \u010do vedie k tomu, \u017ee r\u00f4zne subsyst\u00e9my a ovl\u00e1da\u010de vym\u00fd\u0161\u013eaj\u00fa vlastn\u00e9 protokoly. <\/p>\n
Netlink pon\u00faka jednotn\u00fa komunika\u010dn\u00fa vrstvu a roz\u0161\u00edrite\u013en\u00fd form\u00e1t spr\u00e1v, ktor\u00fd m\u00f4\u017ee fungova\u0165 ako prostredn\u00edk, automaticky kombinuj\u00faci v jednom po\u017eiadavku roztrhnut\u00e9 \u00fadaje z r\u00f4znych zdrojov. Napr\u00edklad, na Netlink m\u00f4\u017eu by\u0165 preveden\u00e9 tak\u00e9 subsyst\u00e9my FreeBSD, ako devd, jail a pfilctl, ktor\u00e9 v s\u00fa\u010dasnosti pou\u017e\u00edvaj\u00fa vlastn\u00e9 volania ioctl, \u010do zna\u010dne zjednodu\u0161\u00ed vytv\u00e1ranie aplik\u00e1ci\u00ed na pr\u00e1cu s t\u00fdmito subsyst\u00e9mami. Okrem toho, pou\u017eitie Netlinku na \u00fapravu objektov a skup\u00edn nexthop v routovacom z\u00e1sobn\u00edku umo\u017en\u00ed \u00fa\u010dinnej\u0161ie interagova\u0165 s procesmi routovania v pou\u017e\u00edvate\u013eskom priestore. <\/p>\n
Z\u00edskanie inform\u00e1ci\u00ed o tras\u00e1ch, objektoch a skupin\u00e1ch nexthops, sie\u0165ov\u00fdch rozhraniach, adres\u00e1ch a susedn\u00fdch hostite\u013eoch (arp\/ndp).\n
Vytv\u00e1ranie ozn\u00e1men\u00ed o objaven\u00ed a odpojen\u00ed sie\u0165ov\u00fdch rozhran\u00ed, nastaven\u00ed a odstr\u00e1nen\u00ed adries, prid\u00e1van\u00ed a odstra\u0148ovan\u00ed tr\u00e1s.\n
Prid\u00e1vanie a odstra\u0148ovanie tr\u00e1s, objektov a skup\u00edn nexthops, br\u00e1n, sie\u0165ov\u00fdch rozhran\u00ed.\n
Integr\u00e1cia s rozhran\u00edm Rtsock na spr\u00e1vu smerovacej tabu\u013eky. <\/ul>\n