1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
#
# SPDX-FileCopyrightText: 2019 Kirill Elagin <https://kir.elagin.me/>
#
# SPDX-License-Identifier: MPL-2.0 or MIT
#
# RFC 1035, 3.3.9
{ lib }:
let
inherit (lib) dns mkOption types;
in
{
rtype = "MX";
options = {
preference = mkOption {
type = types.ints.u16;
example = 10;
description = "The preference given to this RR among others at the same owner. Lower values are preferred";
};
exchange = mkOption {
type = dns.types.domain-name;
example = "smtp.example.com.";
description = "A <domain-name> which specifies a host willing to act as a mail exchange for the owner name";
};
};
dataToString = {preference, exchange, ...}:
"${toString preference} ${exchange}";
}