1 files changed, 89 insertions, 0 deletions
diff --git a/nixos/modules/services/networking/stubby.nix b/nixos/modules/services/networking/stubby.nix
new file mode 100644
index 00000000000..78c13798dde
--- /dev/null
+++ b/nixos/modules/services/networking/stubby.nix
@@ -0,0 +1,89 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.stubby;
+  settingsFormat = pkgs.formats.yaml { };
+  confFile = settingsFormat.generate "stubby.yml" cfg.settings;
+in {
+  imports = map (x:
+    (mkRemovedOptionModule [ "services" "stubby" x ]
+      "Stubby configuration moved to services.stubby.settings.")) [
+        "authenticationMode"
+        "fallbackProtocols"
+        "idleTimeout"
+        "listenAddresses"
+        "queryPaddingBlocksize"
+        "roundRobinUpstreams"
+        "subnetPrivate"
+        "upstreamServers"
+      ];
+
+  options = {
+    services.stubby = {
+
+      enable = mkEnableOption "Stubby DNS resolver";
+
+      settings = mkOption {
+        type = types.attrsOf settingsFormat.type;
+        example = lib.literalExpression ''
+          pkgs.stubby.passthru.settingsExample // {
+            upstream_recursive_servers = [{
+              address_data = "158.64.1.29";
+              tls_auth_name = "kaitain.restena.lu";
+              tls_pubkey_pinset = [{
+                digest = "sha256";
+                value = "7ftvIkA+UeN/ktVkovd/7rPZ6mbkhVI7/8HnFJIiLa4=";
+              }];
+            }];
+          };
+        '';
+        description = ''
+          Content of the Stubby configuration file. All Stubby settings may be set or queried
+          here. The default settings are available at
+          <literal>pkgs.stubby.passthru.settingsExample</literal>. See
+          <link xlink:href="https://dnsprivacy.org/wiki/display/DP/Configuring+Stubby"/>.
+          A list of the public recursive servers can be found here:
+          <link xlink:href="https://dnsprivacy.org/wiki/display/DP/DNS+Privacy+Test+Servers"/>.
+        '';
+      };
+
+      debugLogging = mkOption {
+        default = false;
+        type = types.bool;
+        description = "Enable or disable debug level logging.";
+      };
+
+    };
+  };
+
+  config = mkIf cfg.enable {
+    assertions = [{
+      assertion =
+        (cfg.settings.resolution_type or "") == "GETDNS_RESOLUTION_STUB";
+      message = ''
+        services.stubby.settings.resolution_type must be set to "GETDNS_RESOLUTION_STUB".
+        Is services.stubby.settings unset?
+      '';
+    }];
+
+    services.stubby.settings.appdata_dir = "/var/cache/stubby";
+
+    systemd.services.stubby = {
+      description = "Stubby local DNS resolver";
+      after = [ "network.target" ];
+      before = [ "nss-lookup.target" ];
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        Type = "notify";
+        AmbientCapabilities = "CAP_NET_BIND_SERVICE";
+        CapabilityBoundingSet = "CAP_NET_BIND_SERVICE";
+        ExecStart = "${pkgs.stubby}/bin/stubby -C ${confFile} ${optionalString cfg.debugLogging "-l"}";
+        DynamicUser = true;
+        CacheDirectory = "stubby";
+      };
+    };
+  };
+}