16e4b05653
also workaround a bug in rebinding/updates where we get an error from "ip addr add" trying to add an address that's already present
40 lines
1.3 KiB
Fennel
40 lines
1.3 KiB
Fennel
(local { : system } (require :anoia))
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(local svc (require :anoia.svc))
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;; acquire-delegated-prefix has very similar code: we'd like to move
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;; this to anoia.svc when we see what the general form would look like
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(fn changes [old-addresses new-addresses]
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(let [added {}
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deleted {}]
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(each [n address (pairs new-addresses)]
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(if (not (. old-addresses n))
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(table.insert added address)))
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(each [n address (pairs old-addresses)]
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(if (not (. new-addresses n))
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(table.insert deleted address)))
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(values added deleted)))
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(fn update-addresses [wan-device addresses new-addresses]
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(let [(added deleted) (changes addresses new-addresses)]
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;; see comment in acquire-delegated-prefix.fnl
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(each [_ p (ipairs added)]
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(system
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(.. "ip address change " p.address "/" p.len
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" dev " wan-device
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" valid_lft " p.valid
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" preferred_lft " p.preferred
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)))
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(each [_ p (ipairs deleted)]
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(system
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(.. "ip address del " p.address "/" p.len " dev " wan-device)))
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new-addresses))
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(fn run []
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(let [[state-directory wan-device] arg
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dir (svc.open state-directory)]
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(accumulate [addresses []
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v (dir:events)]
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(update-addresses wan-device addresses (v:output "address")))))
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{ : update-addresses : changes : run }
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