forked from DGNum/liminix
60 lines
2.1 KiB
Fennel
60 lines
2.1 KiB
Fennel
(local { : merge : split : file-exists? : system } (require :anoia))
|
|
(local svc (require :anoia.svc))
|
|
|
|
;; structurally this is remarkably similar to
|
|
;; acquire-lan-prefix.fnl. maybe they should be merged: if not then
|
|
;; we could at least extract some common code
|
|
|
|
;; (alternatively we could move all the parsing code into the thing in
|
|
;; the odhcp service that *writes* this stuff)
|
|
|
|
; (parse-address "2001:8b0:1111:1111:0:ffff:51bb:4cf2/128,3600,7200")
|
|
|
|
|
|
(fn parse-address [str]
|
|
(fn parse-extra [s]
|
|
(let [out {}]
|
|
(each [name val (string.gmatch s ",(.-)=([^,]+)")]
|
|
(tset out name val))
|
|
out))
|
|
(let [(address len preferred valid extra)
|
|
(string.match str "(.-)/(%d+),(%d+),(%d+)(.*)$")]
|
|
(merge {: address : len : preferred : valid} (parse-extra extra))))
|
|
|
|
(local bound-states
|
|
{ :bound true
|
|
:rebound true
|
|
:informed true
|
|
:updated true
|
|
:ra-updated true
|
|
})
|
|
|
|
(fn changes [old-addresses new-addresses]
|
|
(let [added {}
|
|
deleted {}
|
|
old-set (collect [_ v (ipairs old-addresses)] (values v true))
|
|
new-set (collect [_ v (ipairs new-addresses)] (values v true))]
|
|
(each [_ address (ipairs new-addresses)]
|
|
(if (not (. old-set address))
|
|
(table.insert added (parse-address address))))
|
|
(each [_ address (ipairs old-addresses)]
|
|
(if (not (. new-set address))
|
|
(table.insert deleted (parse-address address))))
|
|
(values added deleted)))
|
|
|
|
(let [[state-directory wan-device] arg
|
|
dir (svc.open state-directory)]
|
|
(var addresses [])
|
|
(while true
|
|
(while (not (dir:ready?)) (dir:wait))
|
|
(if (. bound-states (dir:output "state"))
|
|
(let [new-addresses (split " " (dir:output "/addresses"))
|
|
(added deleted) (changes addresses new-addresses)]
|
|
(each [_ p (ipairs added)]
|
|
(system
|
|
(.. "ip address add " p.address "/" p.len " dev " wan-device)))
|
|
(each [_ p (ipairs deleted)]
|
|
(system
|
|
(.. "ip address del " p.address "/" p.len " dev " wan-device)))
|
|
(set addresses new-addresses)))
|
|
(dir:wait)))
|