mirror of
https://github.com/mirage/qubes-mirage-firewall.git
synced 2024-07-01 08:31:18 +00:00
111 lines
4.5 KiB
OCaml
111 lines
4.5 KiB
OCaml
(* Copyright (C) 2015, Thomas Leonard <thomas.leonard@unikernel.com>
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See the README file for details. *)
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open Lwt
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open Qubes
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let src = Logs.Src.create "unikernel" ~doc:"Main unikernel code"
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module Log = (val Logs.src_log src : Logs.LOG)
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module Main (R : Mirage_random.S)(Clock : Mirage_clock.MCLOCK)(Time : Mirage_time.S) = struct
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module Uplink = Uplink.Make(R)(Clock)(Time)
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module Dns_transport = My_dns.Transport(R)(Clock)(Time)
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module Dns_client = Dns_client.Make(Dns_transport)
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(* Set up networking and listen for incoming packets. *)
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let network dns_client dns_responses dns_servers uplink qubesDB router =
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(* Report success *)
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Dao.set_iptables_error qubesDB "" >>= fun () ->
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(* Handle packets from both networks *)
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match uplink with
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| None -> Client_net.listen Clock.elapsed_ns dns_client dns_servers qubesDB router
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| _ ->
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Lwt.choose [
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Client_net.listen Clock.elapsed_ns dns_client dns_servers qubesDB router;
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Uplink.listen uplink Clock.elapsed_ns dns_responses router
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]
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(* Main unikernel entry point (called from auto-generated main.ml). *)
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let start _random _clock _time =
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let start_time = Clock.elapsed_ns () in
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(* Start qrexec agent and QubesDB agent in parallel *)
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let qrexec = RExec.connect ~domid:0 () in
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let qubesDB = DB.connect ~domid:0 () in
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(* Wait for clients to connect *)
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qrexec >>= fun qrexec ->
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let agent_listener = RExec.listen qrexec Command.handler in
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qubesDB >>= fun qubesDB ->
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let startup_time =
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let (-) = Int64.sub in
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let time_in_ns = Clock.elapsed_ns () - start_time in
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Int64.to_float time_in_ns /. 1e9
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in
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Log.info (fun f -> f "QubesDB and qrexec agents connected in %.3f s" startup_time);
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(* Watch for shutdown requests from Qubes *)
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let shutdown_rq =
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Xen_os.Lifecycle.await_shutdown_request () >>= fun (`Poweroff | `Reboot) ->
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Lwt.return_unit in
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(* Set up networking *)
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let max_entries = Key_gen.nat_table_size () in
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let nat = My_nat.create ~max_entries in
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(* Read network configuration from QubesDB *)
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Dao.read_network_config qubesDB >>= fun config ->
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(* config.netvm_ip might be 0.0.0.0 if there's no netvm provided via Qubes *)
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let zero_ip = (Ipaddr.V4.make 0 0 0 0) in
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let connect_if_netvm =
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let netvm_ip = Ipaddr.V4.of_string_exn (Key_gen.ipv4_gw ()) in
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let our_ip = Ipaddr.V4.of_string_exn (Key_gen.ipv4 ()) in
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let dns = Ipaddr.V4.of_string_exn (Key_gen.ipv4_dns ()) in
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let dns2 = Ipaddr.V4.of_string_exn (Key_gen.ipv4_dns2 ()) in
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let default_config:Dao.network_config = {netvm_ip; our_ip; dns; dns2} in
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if config.netvm_ip <> zero_ip then (
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if (netvm_ip <> zero_ip || our_ip <> zero_ip) then begin
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Log.err (fun f -> f "You must not specify --ipv4 or --ipv4-gw when using the netvm property: discard command line options")
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end ;
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Uplink.connect config >>= fun uplink ->
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Lwt.return (config, Some uplink)
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) else (
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(* If we have no netvm IP address we must not try to Uplink.connect and we can update the config
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with command option (if any) *)
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Dao.update_network_config config default_config >>= fun config ->
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Lwt.return (config, None)
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)
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in
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connect_if_netvm >>= fun (config, uplink) ->
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(* We now must have a valid netvm IP address and our IP address or crash *)
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Dao.print_network_config config ;
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assert(config.netvm_ip <> zero_ip && config.our_ip <> zero_ip);
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(* Set up client-side networking *)
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Client_eth.create config >>= fun clients ->
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(* Set up routing between networks and hosts *)
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let router = Router.create
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~config
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~clients
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~nat
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?uplink:(Uplink.interface uplink)
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in
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let send_dns_query = Uplink.send_dns_client_query uplink in
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let dns_mvar = Lwt_mvar.create_empty () in
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let nameservers = `Udp, [ config.Dao.dns, 53 ; config.Dao.dns2, 53 ] in
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let dns_client = Dns_client.create ~nameservers (router, send_dns_query, dns_mvar) in
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let dns_servers = [ config.Dao.dns ; config.Dao.dns2 ] in
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let net_listener = network (Dns_client.getaddrinfo dns_client Dns.Rr_map.A) dns_mvar dns_servers uplink qubesDB router in
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(* Report memory usage to XenStore *)
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Memory_pressure.init ();
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(* Run until something fails or we get a shutdown request. *)
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Lwt.choose [agent_listener; net_listener; shutdown_rq] >>= fun () ->
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(* Give the console daemon time to show any final log messages. *)
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Time.sleep_ns (1.0 *. 1e9 |> Int64.of_float)
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end
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