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types: add domain-label, fqdn #43

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types: add domain-label, fqdn #43

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16 changes: 14 additions & 2 deletions dns/types/simple.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -7,9 +7,21 @@
let
inherit (builtins) stringLength;

# RFC 1035, 3.1
domain-name = lib.types.addCheck lib.types.nonEmptyStr (s: stringLength s <= 255) // {
description = "an RFC 1035 DNS domain name";
};
in

{
# RFC 1035, 3.1
domain-name = lib.types.addCheck lib.types.str (s: stringLength s <= 255);
inherit domain-name;

# RFC 2181, section 11
domain-label = lib.types.addCheck lib.types.nonEmptyStr (s: stringLength s <= 63) // {
description = "a DNS label";
};

fqdn = lib.types.addCheck domain-name (lib.strings.hasSuffix ".") // {
description = "a fully-qualified DNS domain name";
};
}