Hello Jim,
On 15 Nov 2017, at 12:01, Jim McDonald wrote:
I'm writing a PowerDNS module that obtains data from an external
source, and this data is being received in text or wire format. For
example, obtaining a test SOA record from the module's lookup()
returns:
example.com. 3600 IN
SOA ns1.example.com. hostmaster.example.com. 1 900 900 1800
60
in text format and
076578616d706c6503636f6d000006000100000e10003d036e7331076578616d706c6503636f6d000a686f73746d6173746572076578616d706c6503636f6d00000000010000038400000384000007080000003c
in wire format. Is there some in-built way to translate either of
these formats to a DNSResourceRecord so that it can be returned by the
module's get()?
You can look at almost any backend (GSQLBackend::extractRecord comes to
mind) to get the translation from text. The exception is tinydnsbackend
- the tinydns data.cdb file holds wire format data. Look at the use of
PacketReader and mastermake in TinyDNSBackend::get to see how that might
be done, after decoding from hex, in your case. Note that the tinydns
example expects slightly less preamble than your hex dump appears to
have.
Kind regards,
--
Peter van Dijk
PowerDNS.COM BV - https://www.powerdns.com/
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