56 lines
899 B
Perl
56 lines
899 B
Perl
#!/usr/bin/perl
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use strict;
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use warnings;
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my $VERSION = (qw$LastChangedRevision: 1944 $)[1];
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=head1 NAME
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find_zonecut - Find zonecut for a domain name
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=head1 SYNOPSIS
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find_zonecut name
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=head1 DESCRIPTION
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B<find_zonecut> returns the name of the closest delegation point
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to the specified domain name.
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=cut
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use Net::DNS;
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print find_zonecut(shift), "\n";
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sub find_zonecut {
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my $name = shift;
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require Net::DNS::Resolver::Recurse;
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my $resolver = Net::DNS::Resolver::Recurse->new();
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my $response = $resolver->send( $name, 'NULL' ) || die $resolver->errorstring;
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my ($cut) = map { $_->name } $response->authority;
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return $cut || die "failed to find zone cut for $name";
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}
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__END__
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=head1 COPYRIGHT
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(c)2014 Dick Franks E<lt>rwfranks[...]acm.orgE<gt>
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All rights reserved.
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FOR DEMONSTRATION PURPOSES ONLY, NO WARRANTY, NO SUPPORT
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=head1 SEE ALSO
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L<perl>, L<Net::DNS>
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=cut
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