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Improve OOM handling when adding a NAT forward entry

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The callback function was partially applied, meaning that it always used
the NAT table that was in use when processing started, even if the OOM
handler had replaced the table by then. This meant that the retry
attempt would always fail, since it tried to add it to the existing full
table, and also prevented that table from being GC'd.
This commit is contained in:
Thomas Leonard 2016-02-27 12:48:32 +00:00
parent cd917bab7f
commit 0826f046d2
1 changed files with 2 additions and 1 deletions
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firewall.ml
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@ -112,7 +112,8 @@ let rec add_nat_rule_and_transmit ?(retries=100) t frame fn logf =
let add_nat_and_forward_ipv4 t ~frame =
let xl_host = Ipaddr.V4 t.Router.uplink#my_ip in
add_nat_rule_and_transmit t frame
(Nat_rewrite.make_nat_entry t.Router.nat frame xl_host)
(* Note: DO NOT partially apply; [t.nat] may change between calls *)
(fun xl_port -> Nat_rewrite.make_nat_entry t.Router.nat frame xl_host xl_port)
(fun xl_port f ->
match Nat_rewrite.layers frame with
| None -> assert false