From ad4a70ffa1fd622d23cc54e4172b53377cf8f15e Mon Sep 17 00:00:00 2001
From: Lillian-Violet <git@lillianviolet.dev>
Date: Sat, 2 Mar 2024 23:15:23 +0100
Subject: [PATCH] Add contabo wan for ipv6 support

---
 flake.nix                             |  7 +++
 modules/home-manager/default.nix      |  5 +++
 modules/nixos/contabo/wan/default.nix | 65 +++++++++++++++++++++++++++
 modules/nixos/default.nix             |  6 +++
 nixos/hosts/queen/configuration.nix   | 12 +++++
 5 files changed, 95 insertions(+)
 create mode 100644 modules/home-manager/default.nix
 create mode 100644 modules/nixos/contabo/wan/default.nix
 create mode 100644 modules/nixos/default.nix

diff --git a/flake.nix b/flake.nix
index 08456d5..5a3b753 100644
--- a/flake.nix
+++ b/flake.nix
@@ -95,6 +95,13 @@
     # Other options beside 'alejandra' include 'nixpkgs-fmt'
     formatter = forAllSystems (system: nixpkgs.legacyPackages.${system}.alejandra);
 
+    # Reusable nixos modules you might want to export
+    # These are usually stuff you would upstream into nixpkgs
+    nixosModules = import ./modules/nixos;
+    # Reusable home-manager modules you might want to export
+    # These are usually stuff you would upstream into home-manager
+    homeManagerModules = import ./modules/home-manager;
+
     # Your custom packages and modifications, exported as overlays
     overlays = import ./overlays {inherit inputs;};
 
diff --git a/modules/home-manager/default.nix b/modules/home-manager/default.nix
new file mode 100644
index 0000000..c682b92
--- /dev/null
+++ b/modules/home-manager/default.nix
@@ -0,0 +1,5 @@
+# Add your reusable NixOS modules to this directory, on their own file (https://nixos.wiki/wiki/Module).
+# These should be stuff you would like to share with others, not your personal configurations.
+{
+  # List your module files here
+}
diff --git a/modules/nixos/contabo/wan/default.nix b/modules/nixos/contabo/wan/default.nix
new file mode 100644
index 0000000..785ea9b
--- /dev/null
+++ b/modules/nixos/contabo/wan/default.nix
@@ -0,0 +1,65 @@
+{
+  lib,
+  config,
+  ...
+}:
+with lib; let
+  cfg = config.modules.contabo.wan;
+in {
+  options.modules.contabo.wan = {
+    enable = mkEnableOption "Enable Contabo Cloud WAN interface configuration";
+
+    macAddress = mkOption {
+      type = types.str;
+      description = "MAC Address of the WAN interface";
+    };
+
+    ipAddresses = mkOption {
+      type = types.listOf types.str;
+      description = "List of IP Addresses on the WAN interface";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.network.networks."20-wan" = {
+      matchConfig = {
+        MACAddress = cfg.macAddress;
+      };
+      address = cfg.ipAddresses;
+      routes = [
+        {routeConfig.Gateway = "fe80::1";}
+        {routeConfig = {Destination = "172.31.1.1";};}
+        {
+          routeConfig = {
+            Gateway = "172.31.1.1";
+            GatewayOnLink = true;
+          };
+        }
+        {
+          routeConfig = {
+            Destination = "172.16.0.0/12";
+            Type = "unreachable";
+          };
+        }
+        {
+          routeConfig = {
+            Destination = "192.168.0.0/16";
+            Type = "unreachable";
+          };
+        }
+        {
+          routeConfig = {
+            Destination = "10.0.0.0/8";
+            Type = "unreachable";
+          };
+        }
+        {
+          routeConfig = {
+            Destination = "fc00::/7";
+            Type = "unreachable";
+          };
+        }
+      ];
+    };
+  };
+}
diff --git a/modules/nixos/default.nix b/modules/nixos/default.nix
new file mode 100644
index 0000000..8685807
--- /dev/null
+++ b/modules/nixos/default.nix
@@ -0,0 +1,6 @@
+# Add your reusable NixOS modules to this directory, on their own file (https://nixos.wiki/wiki/Module).
+# These should be stuff you would like to share with others, not your personal configurations.
+{
+  # List your module files here
+  contabo.wan = import ./contabo/wan;
+}
diff --git a/nixos/hosts/queen/configuration.nix b/nixos/hosts/queen/configuration.nix
index aa89f8d..c313726 100644
--- a/nixos/hosts/queen/configuration.nix
+++ b/nixos/hosts/queen/configuration.nix
@@ -10,6 +10,7 @@
   imports = [
     # If you want to use modules your own flake exports (from modules/home-manager):
     # outputs.homeManagerModules.example
+    outputs.nixosModules.contabo.wan
     inputs.home-manager.nixosModules.home-manager
     # Or modules exported from other flakes (such as nix-colors):
     # inputs.nix-colors.homeManagerModules.default
@@ -121,6 +122,17 @@
 
   networking.firewall.allowedTCPPorts = [22 80 443];
 
+  networking.useNetworkd = true;
+
+  modules.contabo.wan = {
+    enable = true;
+    macAddress = "aa:bb:cc:dd:ee:ff"; # changeme
+    ipAddresses = [
+      "192.0.2.0/32"
+      "2001:db8::1/64"
+    ];
+  };
+
   # Set your time zone.
   time.timeZone = "Europe/Amsterdam";