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PowerDNS / pdns

PowerDNS Authoritative, PowerDNS Recursor, dnsdist
https://www.powerdns.com/
GNU General Public License v2.0
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GPOS and KX RRTypes not accepted when in BIND backend mode #7437

Open mdavids opened 5 years ago

mdavids commented 5 years ago

Short description

Trying to load a zone (both as master and as slave) with 'eccentric' rrtypes results in errors.

The zone is not served as a consequence.

This is the zone: https://workbench.sidnlabs.nl/zones/types.wb.sidnlabs.nl.txt

Environment

Steps to reproduce

A.1. Configure the zone as master A.2. Restart PowerDNS

B.1. Configure the zone as slave B.2. Restart PowerDNS

Expected behaviour

Be able to load the zone in case A.2 and RFC3597 behaviour in both cases A.2 and B.2. In other words; a working zone in both cases.

Actual behaviour

B.1: PowerDNS does not start and logs an error.

B.2: PowerDNS slaves the zone, stores it on disk, but refuses to serve it and logs an error.

These errors are logged:

'KX' doesn't look like a qtype, stopping loop 'GPOS' doesn't look like a qtype, stopping loop

In the case of B.1, the zone is indeed fetched with an AXFR and stored on disk. The GPOS type is shown as TYPE27 in the file, whereas KX is actually shown as KX on disk.

Other information

The zone used is part of SIDN Labs DNS workbench: https://workbench.sidnlabs.nl/

Usecase

The mentioned zone file is part of the DNS workbench, intended to test behaviour of various name server flavours. The idea is that all these name servers contain the same zone file. This particular test has a focus on RFC3597 compatibility, and thus the zonefile contains quite a number of unusual rrtypes. With the BIND backend configured we cannot load this zone, that contains rrtype KX and GPOS among others.

Description

In the ideal case RFC3597 compliancy would be desired.

mdavids commented 5 years ago

UPDATE: Appears to apply to experimental RRtype MR as well. And ISDN, L32, L64, LP, MG and probably others as well.

omoerbeek commented 5 years ago

Adding all the exotic (and mostly redundant) types is quite some work, since they almost all seem to have new syntax in the data field. Quite some work and little or no gain...

omoerbeek commented 5 years ago

That said, we're happy to review PRs. If they are high quality and low risk the'll hit the tree.