static net

modules/nixos/system/networking/default.nix

@@ -1,6 +1,6 @@
 { config, lib, pkgs, namespace, ... }:
 let
-  inherit (lib) mkIf mkDefault mkEnableOption;
+  inherit (lib) types mkIf mkDefault mkOption mkEnableOption;
   inherit (lib.${namespace}) mkBoolOpt enabled;
 
   cfg = config.${namespace}.system.networking;
@@ -11,6 +11,35 @@ in
     enableIWD = mkEnableOption "Enable IWD";
     useDHCP = mkBoolOpt true "Use DHCP";
     useNetworkd = mkBoolOpt false "Use networkd";
+    useStatic = mkOption {
+      type = types.nullOr (types.submodule {
+        options = {
+          interface = mkOption {
+            type = lib.types.str;
+            description = "Network interface name";
+            example = "enp0s3";
+          };
+          address = mkOption {
+            type = types.str;
+            description = "Static IP address";
+            example = "10.0.20.200";
+          };
+          defaultGateway = mkOption {
+            type = types.str;
+            description = "Default gateway IP";
+            example = "10.0.20.254";
+          };
+          nameservers = mkOption {
+            type = types.listOf types.str;
+            description = "List of DNS servers";
+            example = [ "10.0.20.254" "8.8.8.8" ];
+            default = [ "8.8.8.8" "8.8.4.4" ];
+          };
+        };
+      });
+      default = null;
+      description = "Static Network Configuration";
+    };
   };
 
   config = mkIf cfg.enable {
@@ -24,24 +53,19 @@ in
 
     networking = {
       firewall = enabled;
-      useDHCP = mkDefault cfg.useDHCP;
+      useDHCP = mkIf (cfg.useStatic == null) (mkDefault cfg.useDHCP);
       useNetworkd = cfg.useNetworkd;
-    } // (lib.optionalAttrs cfg.enableIWD) {
+    } // (lib.optionalAttrs (cfg.enableIWD) {
       wireless.iwd = {
         enable = true;
         settings.General.EnableNetworkConfiguration = true;
       };
-    };
-
-    # TODO - Network Configuration
-    # (lib.mkIf (config.network != null) {
-    #   networking = {
-    #     inherit (config.network) defaultGateway nameservers;
-    #     interfaces.${config.network.interface}.ipv4.addresses = [{
-    #       inherit (config.network) address;
-    #       prefixLength = 24;
-    #     }];
-    #   };
-    # })
+    }) // (lib.optionalAttrs (cfg.useStatic != null) {
+      inherit (cfg.useStatic) defaultGateway nameservers;
+      interfaces.${cfg.useStatic.interface}.ipv4.addresses = [{
+        inherit (cfg.useStatic) address;
+        prefixLength = 24;
+      }];
+    });
   };
 }