unikernel/duniverse/mirage/lib/devices/dns.ml

@@ -0,0 +1,21 @@
+open Functoria.DSL
+
+type dns_client = Dns_client
+
+let dns_client = typ Dns_client
+
+let generic_dns_client ?group ?timeout ?nameservers ?cache_size () =
+  let packages = [ package "dns-client-mirage" ~min:"10.0.0" ~max:"11.0.0" ] in
+  let nameservers = Runtime_arg.dns_servers ?group nameservers
+  and timeout = Runtime_arg.dns_timeout ?group timeout
+  and cache_size = Runtime_arg.dns_cache_size ?group cache_size in
+  let runtime_args = Runtime_arg.[ v nameservers; v timeout; v cache_size ] in
+  let connect _info modname = function
+    | [ stackv4v6; happy_eyeballs; nameservers; timeout; cache_size ] ->
+        code ~pos:__POS__
+          {ocaml|%s.connect @[?nameservers:%s ?timeout:%s ?cache_size:%s@ (%s, %s)@]|ocaml}
+          modname nameservers timeout cache_size stackv4v6 happy_eyeballs
+    | _ -> Misc.connect_err "generic_dns_client" 5
+  in
+  impl ~runtime_args ~packages ~connect "Dns_client_mirage.Make"
+    (Stack.stackv4v6 @-> Happy_eyeballs.happy_eyeballs @-> dns_client)