qubes-mirage-firewall/router.ml
2017-03-04 17:22:58 +00:00

35 lines
985 B
OCaml

(* Copyright (C) 2015, Thomas Leonard <thomas.leonard@unikernel.com>
See the README file for details. *)
open Fw_utils
(* The routing table *)
type t = {
client_eth : Client_eth.t;
nat : My_nat.t;
uplink : interface;
}
let create ~client_eth ~uplink ~nat =
{ client_eth; nat; uplink }
let target t buf =
let dst_ip = buf.Ipv4_packet.dst in
match Client_eth.lookup t.client_eth dst_ip with
| Some client_link -> Some (client_link :> interface)
| None -> Some t.uplink
let add_client t = Client_eth.add_client t.client_eth
let remove_client t = Client_eth.remove_client t.client_eth
let classify t ip =
if ip = Ipaddr.V4 t.uplink#my_ip then `Firewall_uplink
else if ip = Ipaddr.V4 t.uplink#other_ip then `NetVM
else (Client_eth.classify t.client_eth ip :> Packet.host)
let resolve t = function
| `Firewall_uplink -> Ipaddr.V4 t.uplink#my_ip
| `NetVM -> Ipaddr.V4 t.uplink#other_ip
| #Client_eth.host as host -> Client_eth.resolve t.client_eth host