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{ config, lib, pkgs, ... }:
with lib;
let
inherit (pkgs) stdenv;
cfg = config.networking.nextdns;
identifyingPrefix = if cfg.identifyDevice then "${config.networking.hostName}-" else "";
in
{
options = {
networking.nextdns.enable = mkOption {
type = types.bool;
default = false;
description = "Whether to enable DNS resolution via NextDNS";
};
networking.nextdns.configID = mkOption {
type = types.str;
default = "";
example = literalExample "abcdef";
description = "NextDNS configuration ID";
};
networking.nextdns.identifyDevice = mkOption {
type = types.bool;
default = false;
description = "Whether to send hostname for identifying in your logs";
};
networking.nextdns.resolver = mkOption {
type = types.enum [ "kresd" "stubby" ];
default = if stdenv.isDarwin then "stubby" else "kresd";
description = "Resolver to use";
};
};
config = mkIf cfg.enable {
assertions = [
{
assertion = !(stdenv.isDarwin && cfg.resolver == "kresd");
message = "kresd is not supported on Darwin";
}
];
networking = if stdenv.isDarwin then
{
dns = [
"::1"
"127.0.0.1"
"2a07:a8c0::ab:d6e5"
"2a07:a8c1::ab:d6e5"
"45.90.28.25"
"45.90.30.25"
];
} else {
networkmanager.dns = "none";
resolvconf.useLocalResolver = true;
};
services.kresd = mkIf (cfg.resolver == "kresd") {
enable = true;
extraConfig = ''
policy.add(policy.all(policy.TLS_FORWARD({
{'45.90.28.0', hostname='${identifyingPrefix}${cfg.configID}.dns1.nextdns.io'},
{'2a07:a8c0::', hostname='${identifyingPrefix}${cfg.configID}.dns1.nextdns.io'},
{'45.90.30.0', hostname='${identifyingPrefix}${cfg.configID}.dns2.nextdns.io'},
{'2a07:a8c1::', hostname='${identifyingPrefix}${cfg.configID}.dns2.nextdns.io'}
})))
'';
};
services.stubby = mkIf (cfg.resolver == "stubby") {
enable = true;
fallbackProtocols = lib.mkDefault [ "GETDNS_TRANSPORT_TLS" ];
roundRobinUpstreams = lib.mkDefault false;
upstreamServers = ''
- address_data: 45.90.28.0
tls_auth_name: "${identifyingPrefix}${cfg.configID}.dns1.nextdns.io"
- address_data: 2a07:a8c0::0
tls_auth_name: "${identifyingPrefix}${cfg.configID}.dns1.nextdns.io"
- address_data: 45.90.30.0
tls_auth_name: "${identifyingPrefix}${cfg.configID}.dns2.nextdns.io"
- address_data: 2a07:a8c1::0
tls_auth_name: "${identifyingPrefix}${cfg.configID}.dns2.nextdns.io"
'';
};
};
}
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