nixos/fireqos: add service

nixos/modules/module-list.nix

@@ -429,6 +429,7 @@
   ./services/networking/fakeroute.nix
   ./services/networking/ferm.nix
   ./services/networking/firefox/sync-server.nix
+  ./services/networking/fireqos.nix
   ./services/networking/firewall.nix
   ./services/networking/flannel.nix
   ./services/networking/flashpolicyd.nix

nixos/modules/services/networking/fireqos.nix

@@ -0,0 +1,52 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.fireqos;
+  fireqosConfig = pkgs.writeText "fireqos.conf" "${cfg.config}";
+in {
+  options.services.fireqos = {
+    enable = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        If enabled, FireQOS will be launched with the specified
+        configuration given in `config`.
+      '';
+    };
+
+    config = mkOption {
+      type = types.str;
+      default = "";
+      example = ''
+        interface wlp3s0 world-in input rate 10mbit ethernet
+          class web commit 50kbit
+            match tcp ports 80,443
+
+        interface wlp3s0 world-out input rate 10mbit ethernet
+          class web commit 50kbit
+            match tcp ports 80,443
+      '';
+      description = ''
+        The FireQOS configuration goes here.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.fireqos = {
+      description = "FireQOS";
+      after = [ "network.target" ];
+      serviceConfig = {
+        Type = "oneshot";
+        RemainAfterExit = true;
+        ExecStart = "${pkgs.firehol}/bin/fireqos start ${fireqosConfig}";
+        ExecStop = [
+          "${pkgs.firehol}/bin/fireqos stop"
+          "${pkgs.firehol}/bin/fireqos clear_all_qos"
+        ];
+      };
+    };
+  };
+}