contrib/build-unbound-localzone-from-hosts.pl

   1 #!/usr/bin/perl -WT
   2
   3 use strict;
   4 use warnings;
   5
   6 my $hostsfile = '/etc/hosts';
   7 my $localzonefile = '/etc/unbound/localzone.conf.new';
   8
   9 my $localzone = 'example.com';
  10
  11 open( HOSTS,"<${hostsfile}" ) or die( "Could not open ${hostsfile}: $!" );
  12 open( ZONE,">${localzonefile}" ) or die( "Could not open ${localzonefile}: $!" );
  13
  14 print ZONE "server:\n\n";
  15 print ZONE "local-zone: \"${localzone}\" transparent\n\n";
  16
  17 my %ptrhash;
  18
  19 while ( my $hostline = <HOSTS> ) {
  20
  21         # Skip comments
  22         if ( $hostline !~ "^#" and $hostline !~ '^\s+$' ) {
  23
  24                 my @entries = split( /\s+/, $hostline );
  25
  26                 my $ip;
  27
  28                 my $count = 0;
  29                 foreach my $entry ( @entries ) {
  30                         if ( $count == 0 ) {
  31                                 $ip = $entry;
  32                         } else {
  33
  34                                 if ( $count == 1) {
  35
  36                                         # Only return localhost for 127.0.0.1 and ::1
  37                                         if ( ($ip ne '127.0.0.1' and $ip ne '::1') or $entry =~ 'localhost' ) {
  38                                                 if ( ! defined $ptrhash{$ip} ) {
  39                                                         $ptrhash{$ip} = $entry;
  40                                                         print ZONE "local-data-ptr: \"$ip $entry\"\n";
  41                                                 }
  42                                         }
  43
  44                                 }
  45
  46                                 # Use AAAA for IPv6 addresses
  47                                 my $a = 'A';
  48                                 if ( $ip =~ ':' ) {
  49                                         $a = 'AAAA';
  50                                 }
  51
  52                                 print ZONE "local-data: \"$entry ${a} $ip\"\n";
  53
  54                         }
  55                         $count++;
  56                 }
  57                 print ZONE "\n";
  58
  59
  60         }
  61 }
  62
  63
  64
  65
  66 __END__
  67