nixpkgs/nixos/modules/services/networking/smartdns.nix

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{ lib, pkgs, config, ... }:
with lib;
let
inherit (lib.types) attrsOf coercedTo listOf oneOf str int bool;
cfg = config.services.smartdns;
confFile = pkgs.writeText "smartdns.conf" (with generators;
toKeyValue {
mkKeyValue = mkKeyValueDefault {
mkValueString = v:
if isBool v then
if v then "yes" else "no"
else
mkValueStringDefault { } v;
} " ";
listsAsDuplicateKeys =
true; # Allowing duplications because we need to deal with multiple entries with the same key.
} cfg.settings);
in {
options.services.smartdns = {
enable = mkEnableOption "SmartDNS DNS server";
bindPort = mkOption {
type = types.port;
default = 53;
description = "DNS listening port number.";
};
settings = mkOption {
type =
let atom = oneOf [ str int bool ];
in attrsOf (coercedTo atom toList (listOf atom));
example = literalExample ''
{
bind = ":5353 -no-rule -group example";
cache-size = 4096;
server-tls = [ "8.8.8.8:853" "1.1.1.1:853" ];
server-https = "https://cloudflare-dns.com/dns-query -exclude-default-group";
prefetch-domain = true;
speed-check-mode = "ping,tcp:80";
};
'';
description = ''
A set that will be generated into configuration file, see the <link xlink:href="https://github.com/pymumu/smartdns/blob/master/ReadMe_en.md#configuration-parameter">SmartDNS README</link> for details of configuration parameters.
You could override the options here like <option>services.smartdns.bindPort</option> by writing <literal>settings.bind = ":5353 -no-rule -group example";</literal>.
'';
};
};
config = lib.mkIf cfg.enable {
services.smartdns.settings.bind = mkDefault ":${toString cfg.bindPort}";
systemd.packages = [ pkgs.smartdns ];
systemd.services.smartdns.wantedBy = [ "multi-user.target" ];
environment.etc."smartdns/smartdns.conf".source = confFile;
environment.etc."default/smartdns".source =
"${pkgs.smartdns}/etc/default/smartdns";
};
}