{ config, lib, pkgs, ... }: let cfg = config.services.lldpd; in { options.services.lldpd = { enable = lib.mkEnableOption "Link Layer Discovery Protocol Daemon"; extraArgs = lib.mkOption { type = lib.types.listOf lib.types.str; default = []; example = [ "-c" "-k" "-I eth0" ]; description = "List of command line parameters for lldpd"; }; }; config = lib.mkIf cfg.enable { users.users._lldpd = { description = "lldpd user"; group = "_lldpd"; home = "/run/lldpd"; isSystemUser = true; }; users.groups._lldpd = {}; environment.systemPackages = [ pkgs.lldpd ]; systemd.packages = [ pkgs.lldpd ]; systemd.services.lldpd = { wantedBy = [ "multi-user.target" ]; environment.LLDPD_OPTIONS = lib.concatStringsSep " " cfg.extraArgs; }; }; }