3 files changed, 282 insertions, 0 deletions
diff --git a/third_party/ddclient/default.nix b/third_party/ddclient/default.nix
new file mode 100644
index 000000000000..a3fcd639af84
--- /dev/null
+++ b/third_party/ddclient/default.nix
@@ -0,0 +1,7 @@
+{ pkgs, ... }:
+
+(pkgs.callPackage ./pkg.nix { }).overrideAttrs (old: {
+  passthru = old.passthru // {
+    module = ./module.nix;
+  };
+})
diff --git a/third_party/ddclient/module.nix b/third_party/ddclient/module.nix
new file mode 100644
index 000000000000..c8d68f9be932
--- /dev/null
+++ b/third_party/ddclient/module.nix
@@ -0,0 +1,230 @@
+# SPDX-License-Identifier: MIT
+# SPDX-FileCopyrightText: Copyright (c) 2003-2023 The Nixpkgs/NixOS contributors
+{ config, pkgs, lib, ... }:
+
+let
+  cfg = config.services.deprecated-ddclient;
+  boolToStr = bool: if bool then "yes" else "no";
+  dataDir = "/var/lib/ddclient";
+  StateDirectory = builtins.baseNameOf dataDir;
+  RuntimeDirectory = StateDirectory;
+
+  configFile' = pkgs.writeText "ddclient.conf" ''
+    # This file can be used as a template for configFile or is automatically generated by Nix options.
+    cache=${dataDir}/ddclient.cache
+    foreground=YES
+    use=${cfg.use}
+    login=${cfg.username}
+    password=${if cfg.protocol == "nsupdate" then "/run/${RuntimeDirectory}/ddclient.key" else "@password_placeholder@"}
+    protocol=${cfg.protocol}
+    ${lib.optionalString (cfg.script != "") "script=${cfg.script}"}
+    ${lib.optionalString (cfg.server != "") "server=${cfg.server}"}
+    ${lib.optionalString (cfg.zone != "")   "zone=${cfg.zone}"}
+    ssl=${boolToStr cfg.ssl}
+    wildcard=YES
+    quiet=${boolToStr cfg.quiet}
+    verbose=${boolToStr cfg.verbose}
+    ${cfg.extraConfig}
+    ${lib.concatStringsSep "," cfg.domains}
+  '';
+  configFile = if (cfg.configFile != null) then cfg.configFile else configFile';
+
+  preStart = ''
+    install --mode=600 --owner=$USER ${configFile} /run/${RuntimeDirectory}/ddclient.conf
+    ${lib.optionalString (cfg.configFile == null) (if (cfg.protocol == "nsupdate") then ''
+      install --mode=600 --owner=$USER ${cfg.passwordFile} /run/${RuntimeDirectory}/ddclient.key
+    '' else if (cfg.passwordFile != null) then ''
+      "${pkgs.replace-secret}/bin/replace-secret" "@password_placeholder@" "${cfg.passwordFile}" "/run/${RuntimeDirectory}/ddclient.conf"
+    '' else ''
+      sed -i '/^password=@password_placeholder@$/d' /run/${RuntimeDirectory}/ddclient.conf
+    '')}
+  '';
+
+in
+
+with lib;
+
+{
+  ###### interface
+
+  options = {
+
+    services.deprecated-ddclient = with lib.types; {
+
+      enable = mkOption {
+        default = false;
+        type = bool;
+        description = lib.mdDoc ''
+          Whether to synchronise your machine's IP address with a dynamic DNS provider (e.g. dyndns.org).
+        '';
+      };
+
+      package = mkOption {
+        type = package;
+        default = pkgs.ddclient;
+        defaultText = lib.literalExpression "pkgs.ddclient";
+        description = lib.mdDoc ''
+          The ddclient executable package run by the service.
+        '';
+      };
+
+      domains = mkOption {
+        default = [ "" ];
+        type = listOf str;
+        description = lib.mdDoc ''
+          Domain name(s) to synchronize.
+        '';
+      };
+
+      username = mkOption {
+        # For `nsupdate` username contains the path to the nsupdate executable
+        default = lib.optionalString (cfg.protocol == "nsupdate") "${pkgs.bind.dnsutils}/bin/nsupdate";
+        defaultText = "";
+        type = str;
+        description = lib.mdDoc ''
+          User name.
+        '';
+      };
+
+      passwordFile = mkOption {
+        default = null;
+        type = nullOr str;
+        description = lib.mdDoc ''
+          A file containing the password or a TSIG key in named format when using the nsupdate protocol.
+        '';
+      };
+
+      interval = mkOption {
+        default = "10min";
+        type = str;
+        description = lib.mdDoc ''
+          The interval at which to run the check and update.
+          See {command}`man 7 systemd.time` for the format.
+        '';
+      };
+
+      configFile = mkOption {
+        default = null;
+        type = nullOr path;
+        description = lib.mdDoc ''
+          Path to configuration file.
+          When set this overrides the generated configuration from module options.
+        '';
+        example = "/root/nixos/secrets/ddclient.conf";
+      };
+
+      protocol = mkOption {
+        default = "dyndns2";
+        type = str;
+        description = lib.mdDoc ''
+          Protocol to use with dynamic DNS provider (see https://sourceforge.net/p/ddclient/wiki/protocols).
+        '';
+      };
+
+      server = mkOption {
+        default = "";
+        type = str;
+        description = lib.mdDoc ''
+          Server address.
+        '';
+      };
+
+      ssl = mkOption {
+        default = true;
+        type = bool;
+        description = lib.mdDoc ''
+          Whether to use SSL/TLS to connect to dynamic DNS provider.
+        '';
+      };
+
+      quiet = mkOption {
+        default = false;
+        type = bool;
+        description = lib.mdDoc ''
+          Print no messages for unnecessary updates.
+        '';
+      };
+
+      script = mkOption {
+        default = "";
+        type = str;
+        description = lib.mdDoc ''
+          script as required by some providers.
+        '';
+      };
+
+      use = mkOption {
+        default = "web, web=checkip.dyndns.com/, web-skip='Current IP Address: '";
+        type = str;
+        description = lib.mdDoc ''
+          Method to determine the IP address to send to the dynamic DNS provider.
+        '';
+      };
+
+      verbose = mkOption {
+        default = false;
+        type = bool;
+        description = lib.mdDoc ''
+          Print verbose information.
+        '';
+      };
+
+      zone = mkOption {
+        default = "";
+        type = str;
+        description = lib.mdDoc ''
+          zone as required by some providers.
+        '';
+      };
+
+      extraConfig = mkOption {
+        default = "";
+        type = lines;
+        description = lib.mdDoc ''
+          Extra configuration. Contents will be added verbatim to the configuration file.
+          ::: {.note}
+          `daemon` should not be added here because it does not work great with the systemd-timer approach the service uses.
+          :::
+        '';
+      };
+    };
+  };
+
+
+  ###### implementation
+
+  config = mkMerge [
+    (mkIf cfg.enable {
+      systemd.services.ddclient = {
+        description = "Dynamic DNS Client";
+        wantedBy = [ "multi-user.target" ];
+        after = [ "network.target" ];
+        restartTriggers = optional (cfg.configFile != null) cfg.configFile;
+        path = lib.optional (lib.hasPrefix "if," cfg.use) pkgs.iproute2;
+
+        serviceConfig = {
+          DynamicUser = true;
+          RuntimeDirectoryMode = "0700";
+          inherit RuntimeDirectory;
+          inherit StateDirectory;
+          Type = "oneshot";
+          ExecStartPre = "!${pkgs.writeShellScript "ddclient-prestart" preStart}";
+          ExecStart = "${lib.getBin cfg.package}/bin/ddclient -file /run/${RuntimeDirectory}/ddclient.conf";
+        };
+      };
+
+      systemd.timers.ddclient = {
+        description = "Run ddclient";
+        wantedBy = [ "timers.target" ];
+        timerConfig = {
+          OnBootSec = cfg.interval;
+          OnUnitInactiveSec = cfg.interval;
+        };
+      };
+    })
+    {
+      ids.uids.ddclient = 30;
+      ids.gids.ddclient = 30;
+    }
+  ];
+}
diff --git a/third_party/ddclient/pkg.nix b/third_party/ddclient/pkg.nix
new file mode 100644
index 000000000000..586f3891ac96
--- /dev/null
+++ b/third_party/ddclient/pkg.nix
@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: MIT
+# SPDX-FileCopyrightText: Copyright (c) 2003-2023 The Nixpkgs/NixOS contributors
+{ lib, fetchFromGitHub, perlPackages, autoreconfHook, iproute2, perl }:
+
+perlPackages.buildPerlPackage rec {
+  pname = "ddclient";
+  version = "3.10.0";
+
+  outputs = [ "out" ];
+
+  src = fetchFromGitHub {
+    owner = "ddclient";
+    repo = "ddclient";
+    rev = "v${version}";
+    sha256 = "sha256-wWUkjXwVNZRJR1rXPn3IkDRi9is9vsRuNC/zq8RpB1E=";
+  };
+
+  postPatch = ''
+    touch Makefile.PL
+  '';
+
+  nativeBuildInputs = [ autoreconfHook ];
+
+  buildInputs = with perlPackages; [ IOSocketINET6 IOSocketSSL JSONPP ];
+
+  installPhase = ''
+    runHook preInstall
+    # patch sheebang ddclient script which only exists after buildPhase
+    preConfigure
+    install -Dm755 ddclient $out/bin/ddclient
+    install -Dm644 -t $out/share/doc/ddclient COP* README.* ChangeLog.md
+    runHook postInstall
+  '';
+
+  # TODO: run upstream tests
+  doCheck = false;
+
+  meta = with lib; {
+    description = "Client for updating dynamic DNS service entries";
+    homepage = "https://ddclient.net/";
+    license = licenses.gpl2Plus;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ SuperSandro2000 ];
+  };
+}