1 files changed, 106 insertions, 0 deletions
diff --git a/share/nixos-modules/iwd-ext.nix b/share/nixos-modules/iwd-ext.nix
new file mode 100644
index 0000000..ddf0494
--- /dev/null
+++ b/share/nixos-modules/iwd-ext.nix
@@ -0,0 +1,106 @@
+{ config, lib, pkgs, ... }:
+let
+  inherit (lib) mkEnableOption mkIf mkOption types recursiveUpdate;
+
+  cfg = config.networking.wireless.iwd-ext;
+  ini = pkgs.formats.ini { };
+  defaults = {
+    # without UseDefaultInterface, sometimes wlan0 simply goes AWOL with 
+    # NetworkManager
+    # https://iwd.wiki.kernel.org/interface_lifecycle#interface_management_in_iwd
+    General.UseDefaultInterface = with config.networking.networkmanager;
+      (enable && (wifi.backend == "iwd"));
+  };
+  configFile = ini.generate "main.conf" (recursiveUpdate defaults cfg.settings);
+
+in
+{
+  options.networking.wireless.iwd-ext = {
+    enable = mkEnableOption (lib.mdDoc "iwd");
+
+    package = mkOption {
+      type = types.package;
+      default = pkgs.iwd;
+      defaultText = lib.literalExpression "pkgs.iwd";
+      description = lib.mdDoc ''
+        The iwd package to use
+      '';
+    };
+
+    settings = mkOption {
+      type = ini.type;
+      default = { };
+
+      example = {
+        Settings.AutoConnect = true;
+
+        Network = {
+          EnableIPv6 = true;
+          RoutePriorityOffset = 300;
+        };
+      };
+
+      description = lib.mdDoc ''
+        Options passed to iwd.
+        See [here](https://iwd.wiki.kernel.org/networkconfigurationsettings) for
+        supported options.
+      '';
+    };
+
+    networks = mkOption {
+      type = types.attrsOf ini.type;
+      default = { };
+      example = {
+        HomeNetwork = {
+          Security.PreSharedKey = "totallysecurepsk";
+        };
+        "@NETWORK_2_SSID@" = {
+          Security.PreSharedKey = "@NETWORK_2_PSK@";
+        };
+      };
+
+      description = lib.mdDoc ''
+        AttrSet of type SSID - iwd network INI config.
+        See [here](https://iwd.wiki.kernel.org/networkconfigurationsettings) for
+        supported options.
+      '';
+    };
+  }; # end of options.networking.wireless.iwd-ext
+
+  config = mkIf cfg.enable {
+    assertions = [
+      {
+        assertion = !config.networking.wireless.enable;
+        message = ''
+          Only one wireless daemon is allowed at the time:
+          networking.wireless.enable and networking.wireless.iwd-ext.enable are
+          mutually exclusive.
+        '';
+      }
+      {
+        assertion = !config.networking.iwd.enable;
+        message = ''
+          Only one wireless daemon is allowed at the time:
+          networking.wireless.iwd.enable and networking.wireless.iwd-ext.enable are
+          mutually exclusive.
+        '';
+      }
+    ];
+
+    environment.etc."iwd/${configFile.name}".source = configFile;
+
+    environment.systemPackages = [ cfg.package ]; # for iwctl
+    services.dbus.packages = [ cfg.package ];
+    systemd.packages = [ cfg.package ];
+
+    systemd.network.links."80-iwd" = {
+      matchConfig.Type = "wlan";
+      linkConfig.NamePolicy = "keep kernel";
+    };
+
+    systemd.services.iwd = {
+      wantedBy = [ "multi-user.target" ];
+      restartTriggers = [ configFile ];
+    };
+  };
+}