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Code Editor : dhcpd-conf-to-ldap

#!/usr/bin/perl -w

# Brian Masney <masneyb@gftp.org>
# To use this script, set your base DN below. Then run 
# ./dhcpd-conf-to-ldap.pl < /path-to-dhcpd-conf/dhcpd.conf > output-file
# The output of this script will generate entries in LDIF format. You can use
# the slapadd command to add these entries into your LDAP server. You will
# definately want to double check that your LDAP entries are correct before
# you load them into LDAP.

# This script does not do much error checking. Make sure before you run this
# that the DHCP server doesn't give any errors about your config file

# FailOver notes:
#   Failover is disabled by default, since it may need manually intervention.
#   You can try the '--use=failover' option to see what happens :-)
#
#   If enabled, the failover pool references will be written to LDIF output.
#   The failover configs itself will be added to the dhcpServer statements
#   and not to the dhcpService object (since this script uses only one and
#   it may be usefull to have multiple service containers in failover mode).
#   Further, this script does not check if primary or secondary makes sense,
#   it simply converts what it gets...

use Net::Domain qw(hostname hostfqdn hostdomain);
use Getopt::Long;

my $domain = hostdomain();           # your.domain
my $basedn = "dc=".$domain;
   $basedn =~ s/\./,dc=/g;           # dc=your,dc=domain
my $server = hostname();             # hostname (nodename)
my $dhcpcn = 'DHCP Config';          # CN of DHCP config tree
my $dhcpdn = "cn=$dhcpcn, $basedn";  # DHCP config tree DN
my $second = '';                     # secondary server DN / hostname
my $i_conf = '';                     # dhcp.conf file to read or stdin
my $o_ldif = '';                     # output ldif file name or stdout
my @use    = ();                     # extended flags (failover)

sub usage($;$)
{
  my $rc = shift;
  my $err= shift;

print STDERR "Error: $err\n\n" if(defined $err);
  print STDERR <<__EOF_USAGE__;
usage: 
  $0 [options] < dhcpd.conf > dhcpd.ldif

options:

--basedn  "dc=your,dc=domain"        ("$basedn")

--dhcpdn  "dhcp config DN"           ("$dhcpdn")

--server  "dhcp server name"         ("$server")

--second  "secondary server or DN"   ("$second")

--conf    "/path/to/dhcpd.conf"      (default is stdin)
  --ldif    "/path/to/output.ldif"     (default is stdout)

--use     "extended features"        (see source comments)
__EOF_USAGE__
  exit($rc);
}

sub next_token
{
  local ($lowercase) = @_;
  local ($token, $newline);

do 
    {
      if (!defined ($line) || length ($line) == 0)
        {
          $line = <>;
          return undef if !defined ($line);
          chop $line;
          $line_number++;
          $token_number = 0;
        }

$line =~ s/#.*//;
      $line =~ s/^\s+//;
      $line =~ s/\s+$//;
    }
  while (length ($line) == 0);

if (($token, $newline) = $line =~ /^(.*?)\s+(.*)/)
    {
      if ($token =~ /^"/) {
       #handle quoted token
       if ($token !~ /"\s*$/)
       {
         ($tok, $newline)  = $newline =~ /([^"]+")(.*)/;
         $token .= " $tok";
        }
      }
      $line = $newline;
    }
  else
    {
      $token = $line;
      $line = '';
    }
  $token_number++;

$token =~ y/[A-Z]/[a-z]/ if $lowercase;

return ($token);
}

sub remaining_line
{
  local ($block) = shift || 0;
  local ($tmp, $str);

$str = "";
  while (defined($tmp = next_token (0)))
    {
      $str .= ' ' if !($str eq "");
      $str .= $tmp;
      last if $tmp =~ /;\s*$/;
      last if($block and $tmp =~ /\s*[}{]\s*$/);
    }

$str =~ s/;$//;
  return ($str);
}

sub
add_dn_to_stack
{
  local ($dn) = @_;

$current_dn = "$dn, $current_dn";
}

sub
remove_dn_from_stack
{
  $current_dn =~ s/^.*?,\s*//;
}

sub
parse_error
{
  print "Parse error on line number $line_number at token number $token_number\n";
  exit (1);
}

sub
print_entry
{
  return if (scalar keys %curentry == 0);

if (!defined ($curentry{'type'}))
    {
      $hostdn = "cn=$server, $basedn";
      print "dn: $hostdn\n";
      print "cn: $server\n";
      print "objectClass: top\n";
      print "objectClass: dhcpServer\n";
      print "dhcpServiceDN: $current_dn\n";
      if(grep(/FaIlOvEr/i, @use))
        {
          foreach my $fo_peer (keys %failover)
            {
              next if(scalar(@{$failover{$fo_peer}}) <= 1);
              print "dhcpStatements: failover peer $fo_peer { ",
                    join('; ', @{$failover{$fo_peer}}), "; }\n";
            }
        }
      print "\n";

print "dn: $current_dn\n";
      print "cn: $dhcpcn\n";
      print "objectClass: top\n";
      print "objectClass: dhcpService\n";
      if (defined ($curentry{'options'}))
        {
          print "objectClass: dhcpOptions\n";
        }
      print "dhcpPrimaryDN: $hostdn\n";
      if(grep(/FaIlOvEr/i, @use) and ($second ne ''))
        {
          print "dhcpSecondaryDN: $second\n";
        }
    }
  elsif ($curentry{'type'} eq 'subnet')
    {
      print "dn: $current_dn\n";
      print "cn: " . $curentry{'ip'} . "\n";
      print "objectClass: top\n";
      print "objectClass: dhcpSubnet\n";
      if (defined ($curentry{'options'}))
        {
          print "objectClass: dhcpOptions\n";
        }
      
      print "dhcpNetMask: " . $curentry{'netmask'} . "\n";
      if (defined ($curentry{'ranges'}))
        {
          foreach $statement (@{$curentry{'ranges'}})
            {
              print "dhcpRange: $statement\n";
            }
        }
    }
  elsif ($curentry{'type'} eq 'shared-network')
    {
      print "dn: $current_dn\n";
      print "cn: " . $curentry{'descr'} . "\n";
      print "objectClass: top\n";
      print "objectClass: dhcpSharedNetwork\n";
      if (defined ($curentry{'options'}))
        {
          print "objectClass: dhcpOptions\n";
        }
    }
  elsif ($curentry{'type'} eq 'group')
    {
      print "dn: $current_dn\n";
      print "cn: group", $curentry{'idx'}, "\n";
      print "objectClass: top\n";
      print "objectClass: dhcpGroup\n";
      if (defined ($curentry{'options'}))
        {
          print "objectClass: dhcpOptions\n";
        }
    }
  elsif ($curentry{'type'} eq 'host')
    {
      print "dn: $current_dn\n";
      print "cn: " . $curentry{'host'} . "\n";
      print "objectClass: top\n";
      print "objectClass: dhcpHost\n";
      if (defined ($curentry{'options'}))
        {
          print "objectClass: dhcpOptions\n";
        }

if (defined ($curentry{'hwaddress'}))
        {
          $curentry{'hwaddress'} =~ y/[A-Z]/[a-z]/;
          print "dhcpHWAddress: " . $curentry{'hwaddress'} . "\n";
        }
    }
  elsif ($curentry{'type'} eq 'pool')
    {
      print "dn: $current_dn\n";
      print "cn: pool", $curentry{'idx'}, "\n";
      print "objectClass: top\n";
      print "objectClass: dhcpPool\n";
      if (defined ($curentry{'options'}))
        {
          print "objectClass: dhcpOptions\n";
        }

if (defined ($curentry{'ranges'}))
        {
          foreach $statement (@{$curentry{'ranges'}})
            {
              print "dhcpRange: $statement\n";
            }
        }
    }
  elsif ($curentry{'type'} eq 'class')
    {
      print "dn: $current_dn\n";
      print "cn: " . $curentry{'class'} . "\n";
      print "objectClass: top\n";
      print "objectClass: dhcpClass\n";
      if (defined ($curentry{'options'}))
        {
          print "objectClass: dhcpOptions\n";
        }
    }
  elsif ($curentry{'type'} eq 'subclass')
    {
      print "dn: $current_dn\n";
      print "cn: " . $curentry{'subclass'} . "\n";
      print "objectClass: top\n";
      print "objectClass: dhcpSubClass\n";
      if (defined ($curentry{'options'}))
        {
          print "objectClass: dhcpOptions\n";
        }
      print "dhcpClassData: " . $curentry{'class'} . "\n";
    }

if (defined ($curentry{'statements'}))
    {
      foreach $statement (@{$curentry{'statements'}})
        {
          print "dhcpStatements: $statement\n";
        }
    }

if (defined ($curentry{'options'}))
    {
      foreach $statement (@{$curentry{'options'}})
        {
          print "dhcpOption: $statement\n";
        }
    }

print "\n";
  undef (%curentry);
}

sub parse_netmask
{
  local ($netmask) = @_;
  local ($i);

if ((($a, $b, $c, $d) = $netmask =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/) != 4)
    {
      parse_error ();
    }

$num = (($a & 0xff) << 24) |
         (($b & 0xff) << 16) |
         (($c & 0xff) << 8) |
          ($d & 0xff);

for ($i=1; $i<=32 && $num & (1 << (32 - $i)); $i++)
    {
    }
  $i--;

return ($i);
}

sub parse_subnet
{
  local ($ip, $tmp, $netmask);

print_entry () if %curentry;
    
  $ip = next_token (0);
  parse_error () if !defined ($ip);

$tmp = next_token (1);
  parse_error () if !defined ($tmp);
  parse_error () if !($tmp eq 'netmask');

$tmp = next_token (0);
  parse_error () if !defined ($tmp);
  $netmask = parse_netmask ($tmp);