fix dns

modules/misc/static-ip.nix

@@ -1,46 +1,48 @@
-{config, lib, ...}:
+{ config, lib, ... }:
 with lib;
-let
-   cfg = config.custom.static-ip;
-in
-{
-   options.custom.static-ip = {
-      enable = mkEnableOption "Enables static-ip";
-      ip = lib.mkOption {
-        type = types.str;
-        description = "ipv4 address";
+let cfg = config.custom.static-ip;
+in {
+  options.custom.static-ip = {
+    enable = mkEnableOption "Enables static-ip";
+    ip = lib.mkOption {
+      type = types.str;
+      description = "ipv4 address";
+    };
+    dns = lib.mkOption {
+      type = types.str;
+      description = "ip of the dns server";
+    };
+    interface = lib.mkOption {
+      type = types.str;
+      description = "interface to apply the change to";
+    };
+    gateway = lib.mkOption {
+      type = types.str;
+      default = "192.168.0.1";
+      description = "Default gateway";
+    };
+  };
+  config = let fallback = "1.1.1.1";
+  in mkIf cfg.enable {
+    networking = {
+      defaultGateway = cfg.gateway;
+      useDHCP = false;
+      nameservers = [ cfg.dns ]
+        ++ lib.lists.optionals (!config.services.resolved.enable) [ fallback ];
+      interfaces = {
+        ${cfg.interface} = {
+          name = "eth0";
+          ipv4.addresses = [{
+            address = cfg.ip;
+            prefixLength = 24;
+          }];
+        };
       };
-      dns = lib.mkOption {
-        type = types.str;
-        description = "ip of the dns server";
-      };
-      interface = lib.mkOption {
-        type = types.str;
-        description = "interface to apply the change to";
-      };
-      gateway = lib.mkOption {
-        type = types.str;
-        default = "192.168.0.1";
-        description = "Default gateway";
-      };
-   };
-   config = mkIf cfg.enable {
-     networking = {
-       defaultGateway = cfg.gateway;
-       useDHCP = false;
-       nameservers = [
-         cfg.dns
-         "1.1.1.1"
-       ];
-       interfaces = {
-         ${cfg.interface} = {
-           name = "eth0";
-           ipv4.addresses = [{
-             address = cfg.ip;
-             prefixLength = 24;
-           }];
-         };
-       };
-     };
+    };
+
+    services.resolved = lib.mkIf config.services.resolved.enable {
+      llmnr = "false";
+      fallbackDns = [ "1.1.1.1" ];
+    };
   };
 }