#!/usr/bin/perl

# usage: curl --silent https://www.spamhaus.org/drop/drop.txt | $0 > /path/to/spamhaus-drop.rpz.local
#
# unbound.conf:
#  rpz:
#    name: "spamhaus-drop.rpz.local."
#    zonefile: "/path/tp/spamhaus-drop.rpz.local"
#    rpz-log: yes
#    rpz-log-name: "spamhaus-drop"
#

use strict;
use vars qw{$o1 $o2 $o3 $o4 $m};

# trailing dots required
my $origin = 'drop.spamhaus.org.rpz.local.';
my $mname  = 'localhost.';
my $rname  = 'root.localhost.';
my $ns     = $mname;

my  $rpz_action = '.';         # return NXDOMAIN
#my $rpz_action = '*.';        # return NODATA
#my $rpz_action = 'rpz-drop.'; # drop the query

print "$origin SOA $mname $rname 1 43200 7200 2419200 3600\n";
print "$origin NS  $ns\n";
while(<>) {
  if(($o1, $o2, $o3, $o4, $m) = m{(\d+)\.(\d+)\.(\d+)\.(\d+)/(\d+)}) {
    print "$m.$o4.$o3.$o2.$o1.rpz-ip.$origin CNAME $rpz_action\n";
  } else {
    print "$_";
  }
}

# add a testpoint: ask for "dns.google"
# print "32.8.8.8.8.rpz-ip.$origin CNAME $rpz_action\n";

exit;