From ea950b8c4cf72034e4f000aee58be6b9b5d489d0 Mon Sep 17 00:00:00 2001
From: Ethel Morgan <eth@ethulhu.co.uk>
Date: Wed, 24 Jun 2020 14:21:31 +0100
Subject: add pkgs.catbus-networkpresence, and corresponding service
---
nixos/modules/module-list.nix | 1 +
.../services/catbus-observer-networkpresence.nix | 95 ++++++++++++++++++++++
2 files changed, 96 insertions(+)
create mode 100644 nixos/modules/services/catbus-observer-networkpresence.nix
(limited to 'nixos')
diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index 4f8e072..dddb83d 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -6,6 +6,7 @@
./programs/dwm.nix
./services/catbus-actuator-wakeonlan.nix
./services/catbus-bridge-snapcast.nix
+ ./services/catbus-observer-networkpresence.nix
./services/dlnatoad.nix
./services/helix-directory-jackalope.nix
./services/helix-directory.nix
diff --git a/nixos/modules/services/catbus-observer-networkpresence.nix b/nixos/modules/services/catbus-observer-networkpresence.nix
new file mode 100644
index 0000000..be48e27
--- /dev/null
+++ b/nixos/modules/services/catbus-observer-networkpresence.nix
@@ -0,0 +1,95 @@
+{ config, lib, pkgs, ... }:
+with lib;
+
+let
+
+ cfg = config.eth.services.catbus-observer-networkpresence;
+
+ configJSON = pkgs.writeText "config.json" ''
+ {
+ "mqttBroker": "tcp://${cfg.mqttBroker.host}:${toString cfg.mqttBroker.port}",
+
+ "devices": {
+ "TV": {
+ "mac": "${cfg.devices.tv.mac}",
+ "topic": "${cfg.devices.tv.topic}"
+ }
+ }
+ }
+ '';
+
+in {
+
+ options.eth.services.catbus-observer-networkpresence = {
+
+ enable = mkEnableOption "Whether to enable the Catbus network-presence observer";
+
+ interface = mkOption {
+ type = types.str;
+ description = "interface to scan";
+ default = "";
+ example = "enp2s0";
+ };
+
+ mqttBroker = {
+ host = mkOption {
+ type = types.str;
+ description = "Host of the MQTT broker.";
+ example = "localhost";
+ };
+ port = mkOption {
+ type = types.int;
+ description = "Port of the MQTT broker.";
+ default = 1883;
+ };
+ };
+
+ # TODO: replace this with a proper set of option sets.
+ devices = {
+ tv = {
+ mac = mkOption {
+ type = types.str;
+ description = "The device's MAC address";
+ example = "aa:bb:cc:dd:ee:ff";
+ };
+ topic = mkOption {
+ type = types.str;
+ description = "MQTT topic for controlling the device";
+ example = "home/house/speakers/power";
+ };
+ };
+ };
+ };
+
+
+ config = mkIf cfg.enable {
+ assertions = [
+ {
+ assertion = cfg.interface != "";
+ message = "must set config.eth.services.catbus-observer-networkpresence.interface";
+ }
+ ];
+
+ systemd.services.catbus-observer-networkpresence = {
+ enable = true;
+ description = "Detect devices on the network to publish to Catbus";
+ wants = [ "network.target" ];
+ after = [ "network.target" ];
+ wantedBy = [ "multi-user.target" ];
+ serviceConfig = {
+ DynamicUser = true;
+ AmbientCapabilities = "CAP_NET_RAW CAP_NET_ADMIN";
+
+ ExecStart = "${pkgs.eth.catbus-networkpresence}/bin/catbus-observer-networkpresence --config-path ${configJSON} --interface ${cfg.interface}";
+
+ NoNewPrivileges = true;
+ ProtectKernelTunables = true;
+ ProtectControlGroups = true;
+ ProtectKernelModules = true;
+ RestrictNamespaces = true;
+ };
+ };
+ };
+
+}
+
--
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