[net-dns-users] handling unsupported record types

[Chris Buxton]

The problem occurred with Net::DNS 0.72. I was not using Net::DNS::ZoneFile to read the zone from disk.

After reading these comments, I tried the script locally, on my development workstation, and it worked fine. On the client's workstation, it failed, despite having the same version of Net::DNS. I have no explanation.

Thanks for the guidance.
Chris Buxton

On May 22, 2013, at 2:30 PM, Dick Franks <rwfranks at acm.org> wrote:

> Chris,
> 
> Revision of Net::DNS?
> 
> I do not understand why a zone transfer would fail in the way you describe.
> 
> Are you using Net::DNS::ZoneFile to read your zone data from disk?
> 
> There should be no need to hack RR.pm.
> Your script needs to handle the exception condition.
> 
>     my $zone = new Net::DNS::ZoneFile( $filename );
>     
>     loop { # through RRs in zone file
> 
>         my $rr = eval { $zone->read; };        # which knows about multi-line RRs
>         if ( $@ ) {
>             warn $@;
>             next;
>         }
> 
>         last unless $rr;
> 
>         # process RR
> 
>     }
> 
> 
> Regards
> 
> Dick Franks
> 
> --
> 
> 
> On 22 May 2013 20:30, Chris Buxton <clists at buxtonfamily.us> wrote:
> I have a script that reads zones from files on disk and also via zone transfer. Currently, when reading in data, if the script encounters a record for which Net::DNS does not implement a record type class, the script dies. The immediate case looks like this:
> 
> WKS not implemented at /usr/lib/perl5/site_perl/5.14/i686-cygwin-threads-64int/Net/DNS/RR.pm line 630.
> new Net:NS::RR( ... ) at ./dnsdiff.pl line 300
> 
> Short of hacking Net::DNS::RR, how can I handle this without dying and without losing any records coming after the unknown record type in a zone transfer?
> 
> Regards,
> Chris Buxton
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