IDNA handling for records is incomplete in dnscontrol #3842
Description
It looks like IDNA handling for records is incomplete in dnscontrol. Take this minimal config, note the ä in the domain:
var REG_NONE = NewRegistrar('none')
var DSP = NewDnsProvider('HETZNER_V2')
D('testing-2025-11-17-ä.dev', REG_NONE, DnsProvider(DSP),
A('@', '127.0.0.1'),
A('foo', '127.0.0.1')
)Logging the first.Name here will print the record name with origin:
CREATE first.Name="xn--testing-2025-11-17--ywb.dev"
CREATE first.Name="foo.xn--testing-2025-11-17--ywb.dev"
DONE
******************** Domain: testing-2025-11-17-ä.dev
2 corrections (HETZNER_V2)
#1: + CREATE xn--testing-2025-11-17--ywb.dev A 127.0.0.1 ttl=300
SUCCESS!
#2: + CREATE foo.xn--testing-2025-11-17--ywb.dev A 127.0.0.1 ttl=300
SUCCESS!
And the next listing will find the records with the FQDN
.Type="NS" input="@" -> .Name="@" .NameFQDN="xn--testing-2025-11-17--ywb.dev"
.Type="A" input="xn--testing-2025-11-17--ywb.dev" -> .Name="xn--testing-2025-11-17--ywb.dev" .NameFQDN="xn--testing-2025-11-17--ywb.dev.xn--testing-2025-11-17--ywb.dev"
.Type="A" input="foo.xn--testing-2025-11-17--ywb.dev" -> .Name="foo.xn--testing-2025-11-17--ywb.dev" .NameFQDN="foo.xn--testing-2025-11-17--ywb.dev.xn--testing-2025-11-17--ywb.dev"
Which we can confirm with a DNS query:
$ dig foo.xn--testing-2025-11-17--ywb.dev @hydrogen.ns.hetzner.com
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 11474
$ dig foo.xn--testing-2025-11-17--ywb.dev.xn--testing-2025-11-17--ywb.dev @hydrogen.ns.hetzner.com
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8090
foo.testing-2025-11-17-ä.dev.testing-2025-11-17-ä.dev. 300 IN A 127.0.0.1
And dnscontrol wants to correct again, but will fail due to unique constraints on the provider side:
DONE
******************** Domain: testing-2025-11-17-ä.dev
3 corrections (HETZNER_V2)
#1: + CREATE xn--testing-2025-11-17--ywb.dev A 127.0.0.1 ttl=300
FAILURE! RRSet already exists (uniqueness_error, c252db090655f464300b6127609cf299)
#2: - DELETE xn--testing-2025-11-17--ywb.dev.xn--testing-2025-11-17--ywb.dev A 127.0.0.1 ttl=300
SUCCESS!
#3: - DELETE foo.xn--testing-2025-11-17--ywb.dev.xn--testing-2025-11-17--ywb.dev A 127.0.0.1 ttl=300
SUCCESS!
#4: + CREATE foo.xn--testing-2025-11-17--ywb.dev A 127.0.0.1 ttl=300
SUCCESS!
And with a simple domain testing-2025-11-17-ä.dev -> testing-2025-11-17-1.dev, I'm getting the bare label, and everything works as expected:
CREATE first.Name="@"
CREATE first.Name="foo"
DONE
******************** Domain: testing-2025-11-17-1.dev
2 corrections (HETZNER_V2)
#1: + CREATE testing-2025-11-17-1.dev A 127.0.0.1 ttl=300
SUCCESS!
#2: + CREATE foo.testing-2025-11-17-1.dev A 127.0.0.1 ttl=300
SUCCESS!
Next listing:
.Type="NS" input="@" -> .Name="@" .NameFQDN="testing-2025-11-17-1.dev"
.Type="A" input="@" -> .Name="@" .NameFQDN="testing-2025-11-17-1.dev"
.Type="A" input="foo" -> .Name="foo" .NameFQDN="foo.testing-2025-11-17-1.dev"
DNS query:
$ dig foo.testing-2025-11-17-1.dev @hydrogen.ns.hetzner.com
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 31856
foo.testing-2025-11-17-1.dev. 300 IN A 127.0.0.1
Originally posted by @das7pad in #3837 (comment)