147 lines
		
	
	
		
			3.7 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
			
		
		
	
	
			147 lines
		
	
	
		
			3.7 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
{ config, pkgs, lib, ... }:
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let
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  inherit (lib) mkOption mkIf singleton;
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  inherit (pkgs) ddclient;
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  stateDir = "/var/spool/ddclient";
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  ddclientUser = "ddclient";
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  ddclientFlags = "-foreground -verbose -noquiet -file ${ddclientCfg}";
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  ddclientPIDFile = "${stateDir}/ddclient.pid";
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  ddclientCfg = pkgs.writeText "ddclient.conf" ''
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    daemon=600
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    cache=${stateDir}/ddclient.cache
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    pid=${ddclientPIDFile}
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    use=${config.services.ddclient.use}
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    login=${config.services.ddclient.username}
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    password=${config.services.ddclient.password}
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    protocol=${config.services.ddclient.protocol}
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    server=${config.services.ddclient.server}
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    ssl=${if config.services.ddclient.ssl then "yes" else "no"}
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    wildcard=YES
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    ${config.services.ddclient.domain}
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    ${config.services.ddclient.extraConfig}
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  '';
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in
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{
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  ###### interface
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  options = {
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    services.ddclient = with lib.types; {
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      enable = mkOption {
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        default = false;
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        type = bool;
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        description = ''
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          Whether to synchronise your machine's IP address with a dynamic DNS provider (e.g. dyndns.org).
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        '';
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      };
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      domain = mkOption {
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        default = "";
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        type = str;
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        description = ''
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          Domain name to synchronize.
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        '';
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      };
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      username = mkOption {
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        default = "";
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        type = str;
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        description = ''
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          Username.
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        '';
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      };
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      password = mkOption {
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        default = "";
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        type = str;
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        description = ''
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          Password.
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        '';
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      };
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      protocol = mkOption {
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        default = "dyndns2";
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        type = str;
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        description = ''
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          Protocol to use with dynamic DNS provider (see http://sourceforge.net/apps/trac/ddclient/wiki/Protocols).
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        '';
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      };
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      server = mkOption {
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        default = "";
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        type = str;
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        description = ''
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          Server address.
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        '';
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      };
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      ssl = mkOption {
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        default = true;
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        type = bool;
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        description = ''
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          Whether to use to use SSL/TLS to connect to dynamic DNS provider.
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        '';
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      };
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      extraConfig = mkOption {
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        default = "";
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        type = str;
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        description = ''
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          Extra configuration. Contents will be added verbatim to the configuration file.
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        '';
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      };
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      use = mkOption {
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        default = "web, web=checkip.dyndns.com/, web-skip='Current IP Address: '";
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        type = str;
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        description = ''
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          Method to determine the IP address to send to the dymanic DNS provider.
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        '';
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      };
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    };
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  };
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  ###### implementation
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  config = mkIf config.services.ddclient.enable {
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    environment.systemPackages = [ ddclient ];
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    users.extraUsers = singleton {
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      name = ddclientUser;
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      uid = config.ids.uids.ddclient;
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      description = "ddclient daemon user";
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      home = stateDir;
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    };
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    systemd.services.ddclient = {
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      description = "Dynamic DNS Client";
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      wantedBy = [ "multi-user.target" ];
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      after = [ "network.target" ];
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      environment.SSL_CERT_FILE = "/etc/ssl/certs/ca-bundle.crt";
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      serviceConfig = {
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        # Uncomment this if too many problems occur:
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        # Type = "forking";
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        User = ddclientUser;
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        Group = "nogroup"; #TODO get this to work
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        PermissionsStartOnly = "true";
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        PIDFile = ddclientPIDFile;
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        ExecStartPre = ''
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          ${pkgs.stdenv.shell} -c "${pkgs.coreutils}/bin/mkdir -m 0755 -p ${stateDir} && ${pkgs.coreutils}/bin/chown ${ddclientUser} ${stateDir}"
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        '';
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        ExecStart = "${ddclient}/bin/ddclient ${ddclientFlags}";
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        #ExecStartPost = "${pkgs.coreutils}/bin/rm -r ${stateDir}"; # Should we have this?
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      };
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    };
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  };
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}
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