From 553c376a49c778b8fde42256cfd399d276c21295 Mon Sep 17 00:00:00 2001
From: Jonas Heinrich <onny@project-insanity.org>
Date: Thu, 16 Feb 2023 11:52:35 +0100
Subject: [PATCH] nixos/networkd-dispatcher: init

---
 .../manual/release-notes/rl-2305.section.md   |  2 +
 nixos/modules/module-list.nix                 |  1 +
 .../networking/networkd-dispatcher.nix        | 63 +++++++++++++++++++
 3 files changed, 66 insertions(+)
 create mode 100644 nixos/modules/services/networking/networkd-dispatcher.nix

diff --git a/nixos/doc/manual/release-notes/rl-2305.section.md b/nixos/doc/manual/release-notes/rl-2305.section.md
index 460d03b6c6de..44e9a68f27e8 100644
--- a/nixos/doc/manual/release-notes/rl-2305.section.md
+++ b/nixos/doc/manual/release-notes/rl-2305.section.md
@@ -42,6 +42,8 @@ In addition to numerous new and upgraded packages, this release has the followin
 
 - [atuin](https://github.com/ellie/atuin), a sync server for shell history. Available as [services.atuin](#opt-services.atuin.enable).
 
+- [networkd-dispatcher](https://gitlab.com/craftyguy/networkd-dispatcher), a dispatcher service for systemd-networkd connection status changes. Available as [services.networkd-dispatcher](#opt-services.networkd-dispatcher.enable).
+
 - [mmsd](https://gitlab.com/kop316/mmsd), a lower level daemon that transmits and recieves MMSes. Available as [services.mmsd](#opt-services.mmsd.enable).
 
 - [QDMR](https://dm3mat.darc.de/qdmr/), a GUI application and command line tool for programming DMR radios [programs.qdmr](#opt-programs.qdmr.enable)
diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index 9ce78c9eb124..4fa3e8e8acdb 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -912,6 +912,7 @@
   ./services/networking/ndppd.nix
   ./services/networking/nebula.nix
   ./services/networking/netbird.nix
+  ./services/networking/networkd-dispatcher.nix
   ./services/networking/networkmanager.nix
   ./services/networking/nextdns.nix
   ./services/networking/nftables.nix
diff --git a/nixos/modules/services/networking/networkd-dispatcher.nix b/nixos/modules/services/networking/networkd-dispatcher.nix
new file mode 100644
index 000000000000..d13ca23368c5
--- /dev/null
+++ b/nixos/modules/services/networking/networkd-dispatcher.nix
@@ -0,0 +1,63 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.networkd-dispatcher;
+in {
+  options = {
+    services.networkd-dispatcher = {
+
+      enable = mkEnableOption (mdDoc ''
+        Networkd-dispatcher service for systemd-networkd connection status
+        change. See [https://gitlab.com/craftyguy/networkd-dispatcher](upstream instructions)
+        for usage.
+      '');
+
+      scriptDir = mkOption {
+        type = types.path;
+        default = "/var/lib/networkd-dispatcher";
+        description = mdDoc ''
+          This directory is used for keeping various scripts read and run by
+          networkd-dispatcher. See [https://gitlab.com/craftyguy/networkd-dispatcher](upstream instructions)
+          for directory structure and script usage.
+        '';
+      };
+
+    };
+  };
+
+  config = mkIf cfg.enable {
+
+    systemd = {
+
+      packages = [ pkgs.networkd-dispatcher ];
+      services.networkd-dispatcher = {
+        wantedBy = [ "multi-user.target" ];
+        # Override existing ExecStart definition
+        serviceConfig.ExecStart = [
+          ""
+          "${pkgs.networkd-dispatcher}/bin/networkd-dispatcher -v --script-dir ${cfg.scriptDir} $networkd_dispatcher_args"
+        ];
+      };
+
+      # Directory structure required according to upstream instructions
+      # https://gitlab.com/craftyguy/networkd-dispatcher
+      tmpfiles.rules = [
+        "d '${cfg.scriptDir}'               0750 root root - -"
+        "d '${cfg.scriptDir}/routable.d'    0750 root root - -"
+        "d '${cfg.scriptDir}/dormant.d'     0750 root root - -"
+        "d '${cfg.scriptDir}/no-carrier.d'  0750 root root - -"
+        "d '${cfg.scriptDir}/off.d'         0750 root root - -"
+        "d '${cfg.scriptDir}/carrier.d'     0750 root root - -"
+        "d '${cfg.scriptDir}/degraded.d'    0750 root root - -"
+        "d '${cfg.scriptDir}/configuring.d' 0750 root root - -"
+        "d '${cfg.scriptDir}/configured.d'  0750 root root - -"
+      ];
+
+    };
+
+
+  };
+}
+