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#!/usr/local/bin/perl |
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# Reverse |
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# |
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# Douglas Thrift |
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# |
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# $Id$ |
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|
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use strict; |
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use warnings; |
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use Net::hostent; |
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use POSIX qw(:time_h :unistd_h); |
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use Socket; |
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|
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my @hostnames; |
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|
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open DAT, "$ENV{HOME}/.reverse.dat" or die "$0: $!"; |
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|
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while (<DAT>) |
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{ |
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$hostnames[$#hostnames + 1] = $& if (/^[^#].*$/); |
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} |
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|
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close DAT; |
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|
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my $namedb = geteuid == 0 ? '/etc/namedb' : '.'; |
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|
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open CONF, "$namedb/named.conf" or die "$0: $!"; |
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|
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my $conf; |
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|
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while (<CONF>) |
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{ |
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$conf .= $_; |
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} |
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|
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my $updated = 0; |
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|
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for my $hostname (@hostnames) |
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{ |
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my $host = gethostbyname $hostname; |
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|
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if (defined $host) |
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{ |
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my $address = inet_ntoa($host->addr); |
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my $zone = join ('.', reverse unpack('C4', $host->addr)) . '.in-addr.arpa'; |
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|
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$host = gethostbyaddr ($host->addr, AF_INET); |
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|
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if (!defined ($host) || $host->name ne $hostname) |
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{ |
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my $serialnum = strftime('%Y%m%d01', localtime); |
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|
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if ($conf =~ /\n# $hostname\nzone "((\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.in-addr\.arpa)" {\n\ttype master;\n\tfile "reverse\/\1";\n};\n/) |
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{ |
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next if ($1 eq $zone); |
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|
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open ZONE, '>', "$namedb/reverse/$zone" or die "$0: $!"; |
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|
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my $oldaddress = "$5.$4.$3.$2"; |
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my $oldzone = $1; |
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my $oldzonefile = "$namedb/reverse/$oldzone"; |
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|
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open OLDZONE, $oldzonefile; |
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|
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$oldaddress =~ s/\./\\./g; |
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$oldzone =~ s/\./\\./g; |
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|
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while (<OLDZONE>) |
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{ |
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s/$oldzone/$zone/; |
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s/\d{10} ; serial$/$serialnum ; serial/; |
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|
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print ZONE; |
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} |
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|
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close OLDZONE; |
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unlink $oldzonefile; |
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|
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$conf =~ s/\t$oldaddress;/\t$address;/g; |
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$conf =~ s/"((?:reverse\/)?)$oldzone"/"$1$zone"/g; |
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} |
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else |
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{ |
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open ZONE, '>', "$namedb/reverse/$zone" or die "$0: $!"; |
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|
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print ZONE "\$ORIGIN . |
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\$TTL 3600 ; 1 hour |
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$zone IN SOA ns.douglasthrift.net. admin.douglasthrift.net. ( |
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$serialnum ; serial |
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7200 ; refresh (2 hours) |
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3600 ; retry (1 hour) |
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604800 ; expire (1 week) |
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3600 ; minimum (1 hour) |
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) |
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NS ns.douglasthrift.net. |
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PTR $hostname. |
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"; |
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|
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$conf .= " |
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# $hostname |
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zone \"$zone\" { |
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type master; |
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file \"reverse/$zone\"; |
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}; |
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"; |
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} |
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|
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close ZONE; |
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|
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$updated = 1; |
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} |
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} |
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elsif ($conf =~ s/\n# $hostname\nzone "(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\.in-addr\.arpa)" {\n\ttype master;\n\tfile "reverse\/\1";\n};\n//) |
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{ |
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unlink "$namedb/reverse/$1"; |
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|
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$updated = 1; |
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} |
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} |
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|
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if ($updated) |
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{ |
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open CONF, '>', "$namedb/named.conf" or die "$0: $!"; |
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print CONF $conf; |
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} |
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|
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close CONF; |
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exec {'/usr/sbin/rndc'} 'rndc', 'reconfig' or die "$0: $!" if ($updated && geteuid == 0); |
