Refactor public ip handling

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/configs/system/default.nix

@@ -3,5 +3,6 @@
   imports = [
     ./cpu/options.nix
     ./impermanence/options.nix
+    ./networking/options.nix
   ];
 }

hosts/common/configs/system/networking/options.nix

@@ -0,0 +1,17 @@
+{ lib, ... }:
+{
+  options.networking =
+    with lib;
+    with types;
+    {
+      publicIPv4 = mkOption {
+        type = nullOr str;
+        description = "The public IPv4 address of this device.";
+      };
+
+      publicIPv6 = mkOption {
+        type = nullOr str;
+        description = "The public IPv6 address of this device.";
+      };
+    };
+}