forked from dan/liminix
60 lines
2.0 KiB
Fennel
60 lines
2.0 KiB
Fennel
(local { : merge : split : file-exists? : system } (require :anoia))
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(local svc (require :anoia.svc))
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(fn parse-prefix [str]
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(fn parse-extra [s]
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(let [out {}]
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(each [name val (string.gmatch s ",(.-)=([^,]+)")]
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(tset out name val))
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out))
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(let [(prefix len preferred valid extra)
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(string.match str "(.-)::/(%d+),(%d+),(%d+)(.*)$")]
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(merge {: prefix : len : preferred : valid} (parse-extra extra))))
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;; Format: <prefix>/<length>,preferred,valid[,excluded=<excluded-prefix>/<length>][,class=<prefix class #>]
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;;(parse-prefix "2001:8b0:de3a:40dc::/64,7198,7198")
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;;(parse-prefix "2001:8b0:de3a:1001::/64,7198,7188,excluded=1/2,thi=10")
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(local bound-states
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{ :bound true
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:rebound true
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:informed true
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:updated true
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:ra-updated true
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})
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; (local { : view } (require :fennel))
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(fn changes [old-prefixes new-prefixes]
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(let [added {}
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deleted {}
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old-set (collect [_ v (ipairs old-prefixes)] (values v true))
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new-set (collect [_ v (ipairs new-prefixes)] (values v true))]
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(each [_ prefix (ipairs new-prefixes)]
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(if (not (. old-set prefix))
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(table.insert added (parse-prefix prefix))))
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(each [_ prefix (ipairs old-prefixes)]
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(if (not (. new-set prefix))
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(table.insert deleted (parse-prefix prefix))))
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(values added deleted)))
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(let [[state-directory lan-device] arg
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dir (svc.open state-directory)]
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(var prefixes [])
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(while true
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(while (not (dir:ready?)) (dir:wait))
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(if (. bound-states (dir:output "state"))
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(let [new-prefixes (split " " (dir:output "/prefixes"))
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(added deleted) (changes prefixes new-prefixes)]
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(each [_ p (ipairs added)]
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(system
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(.. "ip address add " p.prefix "::1/" p.len " dev " lan-device)))
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(each [_ p (ipairs deleted)]
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(system
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(.. "ip address del " p.prefix "::1/" p.len " dev " lan-device)))
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(set prefixes new-prefixes)))
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(dir:wait)))
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