From 66705032bfb640880a273d57e2cbcfa29e91d787 Mon Sep 17 00:00:00 2001
From: David Cantrell <dcantrel@fedoraproject.org>
Date: Wed, 11 Apr 2007 19:36:37 +0000
Subject: [PATCH] Re-added with 0755 permissions.

---
 dhcpd-conf-to-ldap | 517 +++++++++++++++++++++++++++++++++++++++++
 linux              | 566 +++++++++++++++++++++++++++++++++++++++++++++
 linux.dbus-example | 223 ++++++++++++++++++
 3 files changed, 1306 insertions(+)
 create mode 100755 dhcpd-conf-to-ldap
 create mode 100755 linux
 create mode 100755 linux.dbus-example

diff --git a/dhcpd-conf-to-ldap b/dhcpd-conf-to-ldap
new file mode 100755
index 0000000..d68d41a
--- /dev/null
+++ b/dhcpd-conf-to-ldap
@@ -0,0 +1,517 @@
+#!/usr/bin/perl -w
+
+# Brian Masney <masneyb@ntelos.net>
+# 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
+
+use Sys::Hostname;
+
+my $basedn = "dc=ntelos, dc=net";
+
+sub next_token
+{
+  local ($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+(.*)/)
+    {
+      $line = $newline;
+    }
+  else
+    {
+      $token = $line;
+      $line = '';
+    }
+  $token_number++;
+
+  $token =~ y/[A-Z]/[a-z]/ if $lowercase;
+
+  return ($token);
+}
+
+
+sub remaining_line
+{
+  local ($tmp, $str);
+
+  $str = "";
+  while (($tmp = next_token (0)))
+    {
+      $str .= ' ' if !($str eq "");
+      $str .= $tmp;
+      last if $tmp =~ /;\s*$/;
+    }
+
+  $str =~ s/;$//;
+  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'}))
+    {
+      $host = hostname ();
+      $hostdn = "cn=$host, $basedn";
+      print "dn: $hostdn\n";
+      print "objectClass: top\n";
+      print "objectClass: dhcpServer\n";
+      print "cn: $host\n";
+      print "dhcpServiceDN: $current_dn\n\n";
+
+      print "dn: $current_dn\n";
+      print "cn: DHCP Config\n";
+      print "objectClass: top\n";
+      print "objectClass: dhcpService\n";
+      if (defined ($curentry{'options'}))
+        {
+          print "objectClass: dhcpOptions\n";
+        }
+      print "dhcpPrimaryDN: $hostdn\n";
+    }
+  elsif ($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{'range'}))
+        {
+          print "dhcpRange: " . $curentry{'range'} . "\n";
+        }
+    }
+  elsif ($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: $current_dn\n";
+      print "cn: group\n";
+      print "objectClass: top\n";
+      print "objectClass: dhcpGroup\n";
+      if (defined ($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'}))
+        {
+          print "dhcpHWAddress: " . $curentry{'hwaddress'} . "\n";
+        }
+    }
+  elsif ($curentry{'type'} eq 'pool')
+    {
+      print "dn: $current_dn\n";
+      print "cn: pool\n";
+      print "objectClass: top\n";
+      print "objectClass: dhcpPool\n";
+      if (defined ($curentry{'options'}))
+        {
+          print "objectClass: dhcpOptions\n";
+        }
+
+      if (defined ($curentry{'range'}))
+        {
+          print "dhcpRange: " . $curentry{'range'} . "\n";
+        }
+    }
+  elsif ($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);
+
+  $tmp = next_token (0);
+  parse_error () if !defined ($tmp);
+  parse_error () if !($tmp eq '{');
+
+  add_dn_to_stack ("cn=$ip");
+  $curentry{'type'} = 'subnet';
+  $curentry{'ip'} = $ip;
+  $curentry{'netmask'} = $netmask;
+}
+
+
+sub parse_shared_network
+{
+  local ($descr, $tmp);
+
+  print_entry () if %curentry;
+
+  $descr = next_token (0);
+  parse_error () if !defined ($descr);
+
+  $tmp = next_token (0);
+  parse_error () if !defined ($tmp);
+  parse_error () if !($tmp eq '{');
+
+  add_dn_to_stack ("cn=$descr");
+  $curentry{'type'} = 'shared-network';
+  $curentry{'descr'} = $descr;
+}
+
+
+sub parse_host
+{
+  local ($descr, $tmp);
+
+  print_entry () if %curentry;
+
+  $host = next_token (0);
+  parse_error () if !defined ($host);
+
+  $tmp = next_token (0);
+  parse_error () if !defined ($tmp);
+  parse_error () if !($tmp eq '{');
+
+  add_dn_to_stack ("cn=$host");
+  $curentry{'type'} = 'host';
+  $curentry{'host'} = $host;
+}
+
+
+sub parse_group
+{
+  local ($descr, $tmp);
+
+  print_entry () if %curentry;
+
+  $tmp = next_token (0);
+  parse_error () if !defined ($tmp);
+  parse_error () if !($tmp eq '{');
+
+  add_dn_to_stack ("cn=group");
+  $curentry{'type'} = 'group';
+}
+
+
+sub parse_pool
+{
+  local ($descr, $tmp);
+
+  print_entry () if %curentry;
+
+  $tmp = next_token (0);
+  parse_error () if !defined ($tmp);
+  parse_error () if !($tmp eq '{');
+
+  add_dn_to_stack ("cn=pool");
+  $curentry{'type'} = 'pool';
+}
+
+
+sub parse_class
+{
+  local ($descr, $tmp);
+
+  print_entry () if %curentry;
+
+  $class = next_token (0);
+  parse_error () if !defined ($class);
+
+  $tmp = next_token (0);
+  parse_error () if !defined ($tmp);
+  parse_error () if !($tmp eq '{');
+
+  $class =~ s/\"//g;
+  add_dn_to_stack ("cn=$class");
+  $curentry{'type'} = 'class';
+  $curentry{'class'} = $class;
+}
+
+
+sub parse_subclass
+{
+  local ($descr, $tmp);
+
+  print_entry () if %curentry;
+
+  $class = next_token (0);
+  parse_error () if !defined ($class);
+
+  $subclass = next_token (0);
+  parse_error () if !defined ($subclass);
+
+  $tmp = next_token (0);
+  parse_error () if !defined ($tmp);
+  parse_error () if !($tmp eq '{');
+
+  add_dn_to_stack ("cn=$subclass");
+  $curentry{'type'} = 'subclass';
+  $curentry{'class'} = $class;
+  $curentry{'subclass'} = $subclass;
+}
+
+
+sub parse_hwaddress
+{
+  local ($type, $hw, $tmp);
+
+  $type = next_token (0);
+  parse_error () if !defined ($type);
+
+  $hw = next_token (0);
+  parse_error () if !defined ($hw);
+  $hw =~ s/;$//;
+
+  $curentry{'hwaddress'} = "$type $hw";
+}
+
+    
+sub parse_range
+{
+  local ($tmp, $str);
+
+  $str = remaining_line ();
+
+  if (!($str eq ''))
+    {
+      $str =~ s/;$//;
+      $curentry{'range'} = $str;
+    }
+}
+
+
+sub parse_statement
+{
+  local ($token) = shift;
+  local ($str);
+
+  if ($token eq 'option')
+    {
+      $str = remaining_line ();
+      push (@{$curentry{'options'}}, $str);
+    }
+  else
+    {
+      $str = $token . " " . remaining_line ();
+      push (@{$curentry{'statements'}}, $str);
+    }
+}
+
+
+my $token;
+my $token_number = 0;
+my $line_number = 0;
+my %curentry;
+
+$current_dn = "cn=DHCP Config, $basedn";
+$curentry{'descr'} = 'DHCP Config';
+$line = '';
+
+while (($token = next_token (1)))
+  {
+    if ($token eq '}')
+      {
+        print_entry () if %curentry;
+        remove_dn_from_stack ();
+      }
+    elsif ($token eq 'subnet')
+      {
+        parse_subnet ();
+        next;
+      }
+    elsif ($token eq 'shared-network')
+      {
+        parse_shared_network ();
+        next;
+      }
+    elsif ($token eq 'class')
+      {
+        parse_class ();
+        next;
+      }
+    elsif ($token eq 'subclass')
+      {
+        parse_subclass ();
+        next;
+      }
+    elsif ($token eq 'pool')
+      {
+        parse_pool ();
+        next;
+      }
+    elsif ($token eq 'group')
+      {
+        parse_group ();
+        next;
+      }
+    elsif ($token eq 'host')
+      {
+        parse_host ();
+        next;
+      }
+    elsif ($token eq 'hardware')
+      {
+        parse_hwaddress ();
+        next;
+      }
+    elsif ($token eq 'range')
+      {
+        parse_range ();
+        next;
+      }
+    else
+      {
+        parse_statement ($token);
+        next;
+      }
+  }
+
+
diff --git a/linux b/linux
new file mode 100755
index 0000000..81b5bd5
--- /dev/null
+++ b/linux
@@ -0,0 +1,566 @@
+#!/bin/bash
+# dhclient-script for Linux. Dan Halbert, March, 1997.
+# Updated for Linux 2.[12] by Brian J. Murrell, January 1999.
+# No guarantees about this. I'm a novice at the details of Linux
+# networking.
+
+# Notes:
+
+# 0. This script is based on the netbsd script supplied with dhcp-970306.
+
+# 1. ifconfig down apparently deletes all relevant routes and flushes
+# the arp cache, so this doesn't need to be done explicitly.
+
+# 2. The alias address handling here has not been tested AT ALL.
+# I'm just going by the doc of modern Linux ip aliasing, which uses
+# notations like eth0:0, eth0:1, for each alias.
+
+# 3. I have to calculate the network address, and calculate the broadcast
+# address if it is not supplied. This might be much more easily done
+# by the dhclient C code, and passed on.
+
+if [ -n "${dhc_dbus}" ]; then
+   /bin/dbus-send \
+       --system \
+       --dest=com.redhat.dhcp \
+       --type=method_call \
+       /com/redhat/dhcp/$interface \
+       com.redhat.dhcp.set \
+       'string:'"`env | /bin/egrep -v '^(PATH|SHLVL|_|PWD|dhc_dbus)\='`";
+       if (( ( dhc_dbus & 31 ) == 31 )); then
+	   exit 0;
+       fi;
+fi;
+
+function save_previous() {
+  if [ -e $1 ]; then
+    /bin/mv $1 $1.predhclient
+  else
+    echo ''> $1.predhclient 
+  fi
+}
+
+make_resolv_conf() {
+  if [ "${PEERDNS}" == "no" ]; then  
+      return 
+  fi
+
+  if [ x$reason == xRENEW ] &&
+     [ "$new_domain_name" == "$old_domain_name" ] && 
+     [ "$new_domain_name_servers" == "$old_domain_name_servers" ]; then
+      return;
+  fi
+
+  if [ -n "$new_domain_name" ] || [ -n "$new_domain_name_servers" ]; then
+    cp -fp /etc/resolv.conf /etc/resolv.conf.predhclient
+    rscf=`mktemp /tmp/XXXXXX`;
+    echo '; generated by /sbin/dhclient-script' > $rscf
+    if [ -n "$SEARCH" ]; then
+ 	echo search $SEARCH >> $rscf
+    else
+	if [ -n "$new_domain_name" ]; then
+ 	    echo search $new_domain_name >> $rscf
+        fi
+    fi
+    for nameserver in $new_domain_name_servers; do
+      echo nameserver $nameserver >> $rscf
+    done
+    change_resolv_conf $rscf
+    rm -f $rscf
+  fi
+}
+
+# Must be used on exit.   Invokes the local dhcp client exit hooks, if any.
+exit_with_hooks() {
+  exit_status=$1
+  if [ -f /etc/dhclient-exit-hooks ]; then
+    . /etc/dhclient-exit-hooks
+  fi
+# probably should do something with exit status of the local script
+  exit $exit_status
+}
+
+# Invoke the local dhcp client enter hooks, if they exist.
+if [ -f /etc/dhclient-enter-hooks ]; then
+  exit_status=0
+  . /etc/dhclient-enter-hooks
+  # allow the local script to abort processing of this state
+  # local script must set exit_status variable to nonzero.
+  if [ $exit_status -ne 0 ]; then
+    exit $exit_status
+  fi
+fi
+
+# Import Red Hat Linux configuration
+cd /etc/sysconfig/network-scripts;
+. /etc/sysconfig/network-scripts/network-functions
+. /etc/rc.d/init.d/functions
+
+[ -f ../network ] && . ../network
+[ -f ../networking/network ] && . ../networking/network
+
+CONFIG=$interface
+
+need_config ${CONFIG}
+
+if [ -f "${CONFIG}" ]; then 
+    source_config
+else
+    echo $"$0: configuration for $interface not found. Continuing with defaults." >&2
+fi
+
+source_config
+
+release=`uname -r`
+relmajor=`echo $release |/bin/cut -f1 -d'.'`
+relminor=`echo $release |/bin/cut -f2 -d'.'`
+
+# simple IP arithmetic functions:
+
+function quad2num()
+{
+    if [ $# -eq 4 ]; then
+       let n="$1<<24|$2<<16|$3<<8|$4"
+       echo $n;
+       return 0;
+    fi
+    echo '0';
+    return 1;
+}
+
+function ip2num()
+{
+    IFS='.' quad2num $1;
+}
+
+function num2ip()
+{
+    let n="$1";
+    let o1='(n>>24)&0xff';
+    let o2='(n>>16)&0xff';
+    let o3='(n>>8)&0xff';
+    let o4='n & 0xff';
+    echo $o1.$o2.$o3.$o4;
+}
+
+function mask()
+{   
+    ip=$1
+    m=$2
+    let ip=`IFS='.' ip2num $ip`;
+    let m=`IFS='.' ip2num $m`;
+    let n='ip&m';
+    num2ip $n;
+}
+
+function mask_bits()
+{
+    ip=$1
+    let ip=`IFS='.' ip2num $ip`;
+    let bits=0
+    for ((bit=1; '((ip&bit)==0) && (bits < 32)'; 'bit<<=1')) do
+        let bits+=1
+    done
+    let n_bits=32-bits
+    echo $n_bits
+}
+
+function class_bits()
+{
+    let ip=`IFS='.' ip2num $1`;
+    let bits=32
+    let mask='255';
+    for ((i=0; i <= 3; i++, 'mask<<=8')); do
+	let v='ip&mask';
+	if [ "$v" -eq 0 ] ; then
+	    let bits-=8;
+        else
+            break;
+	fi;
+    done;
+    echo $bits;
+}
+
+function routerReachable()
+{ # Handle silly DHCP servers that give us a router not on our subnet:    
+    router=$1
+    routerSubnet=`mask $router $new_subnet_mask`
+    mySubnet=`mask $new_ip_address $new_subnet_mask`
+    unreachable=0
+    if [ "$routerSubnet" != "$mySubnet" ]; then
+	unreachable=1
+	if /sbin/arping -f -q -I $interface -w2 $router; then
+	    /sbin/ip route add ${router}/32 dev $interface
+	    if [ $? -eq 0 ]; then
+		unreachable=0
+	    else
+		/usr/bin/logger -p local7.notice -t "NET"  "dhclient: failed to create host route for unreachable router $router not on subnet $mySubnet";
+	    fi
+	else
+	    unreachable=1
+	    if [ -x /usr/bin/logger ]; then
+		/usr/bin/logger -p local7.notice -t "NET"  "dhclient: DHCP router $router is unreachable on DHCP subnet $mySubnet router subnet $routerSubnet";
+	    fi;
+	fi;
+    fi;
+    return $unreachable;
+}
+
+function add_default_gateway()
+{
+    router=$1
+    metric=''
+    if [ $# -gt 1 ] && [ "$2" -gt 0 ]; then 
+	metric="metric $2";
+    fi;    
+    if routerReachable $router ; then
+	/sbin/ip route replace default via $router dev $interface $metric;
+	if [ $? -ne 0 ]; then 
+	    /usr/bin/logger -p local7.notice -t "NET"  'dhclient: failed to create default route: '$router dev $interface $metric;
+	    return 1;
+	else
+	    return 0;
+	fi;
+    fi;
+    return 1;
+}
+
+function dhconfig()
+{
+    if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
+	if [ x$old_ip_address != x ] && [ x$alias_ip_address != x ] && \
+		[ x$alias_ip_address != x$old_ip_address ]; then
+         # Possible new alias. Remove old alias.
+	    ifconfig $interface:0- inet 0
+	fi
+
+	if [ x$old_ip_address != x ] && [ x$old_ip_address != x$new_ip_address ]; then
+        # IP address changed. Bringing down the interface will delete all routes,
+        # and clear the ARP cache.
+	    ifconfig $interface inet 0 down
+	fi
+    fi
+    if [ x$reason = xBOUND ] || [ x$reason = xREBOOT ] ||
+       [ x$old_ip_address  != x$new_ip_address ] ||
+       [ x$old_subnet_mask != x$new_subnet_mask ] ||
+       [ x$new_network_number != x$new_network_number ] ||
+       [ x$old_broadcast_address != x$new_broadcast_address ] ||
+       [ "x$old_routers" != "x$new_routers" ] ||
+       [ x$old_interface_mtu != x$new_interface_mtu ] ; then
+	if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
+	    ifconfig $interface inet $new_ip_address $new_subnet_arg \
+		$new_broadcast_arg
+	    if [ -n "$new_interface_mtu" ]; then
+		/sbin/ip link set $interface mtu $new_interface_mtu;
+	    fi;
+	    if [ -x /etc/dhclient-${interface}-up-hooks ]; then
+		. /etc/dhclient-${interface}-up-hooks;
+	    elif [ -x /etc/dhclient-up-hooks ]; then
+		. /etc/dhclient-up-hooks;
+	    fi;
+	fi;
+	
+	if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 4 ) != 4 )); then
+	    prefix_bits=`mask_bits $new_subnet_mask`
+            # Add a network route to the computed network address.
+	    if [ $relmajor -lt 2 ] || \
+		( [ $relmajor -eq 2 ] && [ $relminor -eq 0 ] ); then
+		/sbin/ip route replace ${new_network_number}/${prefix_bits} dev $interface
+		if [ $added_old_broadcast_route -eq 1 ]; then
+		   /sbin/ip route del default;
+		fi;
+	    fi;
+	    if [[  ( ( -z "$GATEWAYDEV" )  || ( "$GATEWAYDEV" = "$interface" ) ) && ( ( -z "$GATEWAY" )  || ( ( -n "$DHCLIENT_IGNORE_GATEWAY" ) && ( "$DHCLIENT_IGNORE_GATEWAY" = [Yy]* ) ) ) ]]; then
+		metric=${METRIC:-''};
+		let i=${METRIC:-0};
+		default_routers=()
+		for router in $new_routers; do
+		    added_router=0
+		    for r in ${default_routers[@]}; do
+			if [ "$r" == "$router" ]; then
+			    added_router=1;
+                        fi;
+		    done
+		    if [ -z "$router" ] || [ "$added_router" -eq 1 ] || [ `IFS=. ip2num $router` -le 0 ] || [[ ( "$router" = "$new_broadcast_address" ) && ( "$new_subnet_mask" != "255.255.255.255" ) ]]; then
+			continue;
+		    fi;
+		    default_routers=(${default_routers[@]} $router)
+		    add_default_gateway $router $metric;		    
+		    let i=i+1;
+		    metric=$i; 
+		done
+	    elif [[ ( ( -z "$GATEWAYDEV" ) || ( "$GATEWAYDEV" = "$interface" ) ) && ( -n "$GATEWAY" ) ]]; then
+		routerSubnet=`mask $GATEWAY $new_subnet_mask`
+		mySubnet=`mask $new_ip_address $new_subnet_mask`
+		if [ "$routerSubnet" = "$mySubnet" ]; then
+		    /sbin/ip route replace default via $GATEWAY dev $interface 
+		fi;
+	    fi;
+            # static routes
+	    if [ "x$new_static_routes" != x ]; then
+		IFS=', 	' static_routes=($new_static_routes)
+		route_targets=()
+		for((i=0; i<${#static_routes[@]}; i+=2)); do
+		    target=${static_routes[$i]}
+		    gateway=${static_routes[$i+1]}
+		    metric=''
+		    for t in ${route_targets[@]}; do
+			if [ $t == $target ]; then
+			    if [ -z "$metric" ]; then
+				metric=1;
+			    else
+				((metric=metric+1));
+			    fi;
+			fi;
+		    done;
+		    if [ -n "$metric" ]; then
+			metric="metric $metric";
+		    fi;		    
+		    if routerReachable $gateway; then
+			/sbin/ip route replace ${target}/`class_bits $target` via ${gateway} dev $interface ${metric}
+			if [ $? -ne 0 ]; then
+			   /usr/bin/logger -p local7.notice -t 'NET' 'dhclient: failed to create static route:' ${target}/`class_bits $target` via ${gateway} dev $interface ${metric};			
+			else			    
+ 			   route_targets=(${route_targets[@]} $target);
+			fi;
+		    fi;
+		done
+	    fi
+	fi
+    fi
+    if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
+	if [ x$new_ip_address != x$alias_ip_address ] && [ x$alias_ip_address != x ];
+	    then
+	    ifconfig $interface:0- inet 0
+	    ifconfig $interface:0 inet $alias_ip_address $alias_subnet_arg
+	    /sbin/ip route replace ${alias_ip_address}/32 dev $interface:0
+	fi
+    fi
+    if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 1 ) != 1 )); then
+	make_resolv_conf
+
+	if [ -n "$new_host_name" ] && need_hostname; then
+	    hostname $new_host_name
+	fi
+    fi;
+    if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 8 ) != 8 )); then
+	if [ "${PEERNIS}" = no ]; then
+	    :
+	elif [ -n "$new_nis_domain" ]; then
+	    domainname "$new_nis_domain"
+	    save_previous /etc/yp.conf
+	    let contents=0
+	    echo '# generated by /sbin/dhclient-script' > /etc/yp.conf
+	    if [ -n "$new_nis_servers" ]; then
+		for I in $new_nis_servers; do
+		    echo "domain $new_nis_domain server $I" >> /etc/yp.conf
+		    let contents=contents+1
+		done
+	    else
+		echo "domain $new_nis_domain broadcast" >> /etc/yp.conf
+		let contents=contents+1
+	    fi
+	    level=`/sbin/runlevel`
+	    level=${level##*\ }
+	    if [ "$level" = "unknown" ]; then
+		level=1;
+	    fi
+	    if [ $contents -gt 0 ] && [[ "$level" = [0-6] ]] && /sbin/chkconfig --level=$level ypbind >/dev/null 2>&1 && [ -r /var/run/ypbind.pid ] && yppid=`cat /var/run/ypbind.pid` && [ -d /proc/${yppid} ] && [ "`if [ -x /sbin/busybox ]; then /sbin/busybox readlink /proc/${yppid}/exe; else echo /sbin/ypbind; fi`" = "/sbin/ypbind" ]; then
+	       kill -HUP $yppid;
+	    fi
+	elif [ -n "$new_nis_servers" ]; then
+	    save_previous /etc/yp.conf
+	    echo '# generated by /sbin/dhclient-script' > /etc/yp.conf
+	    let contents=0
+	    for I in $new_nis_servers; do
+		echo "ypserver $I" >> /etc/yp.conf
+		let contents=contents+1
+	    done
+	    level=`/sbin/runlevel`
+	    level=${level##*\ }
+	    if [ "$level" = "unknown" ]; then
+		level=1;
+	    fi
+	    if [ $contents -gt 0 ] && [[ "$level" = [0-6] ]] && /sbin/chkconfig --level=$level ypbind >/dev/null 2>&1 && [ -r /var/run/ypbind.pid ] && yppid=`cat /var/run/ypbind.pid` && [ -d /proc/${yppid} ] && [ "`if [ -x /sbin/busybox ]; then /sbin/busybox readlink /proc/${yppid}/exe; else echo /sbin/ypbind; fi`" = "/sbin/ypbind" ] ; then
+	       kill -HUP $yppid;
+	    fi
+	fi
+    fi
+    if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 16 ) != 16 )); then
+	if [ -n "$DHCP_TIME_OFFSET_SETS_TIMEZONE" ] && [[ "$DHCP_TIME_OFFSET_SETS_TIMEZONE" = [yY1]* ]]; then
+	    if [ -n "$new_time_offset" ]; then
+	    #   DHCP option "time-offset" is requested by default and should be handled.
+	    #   The geographical zone abbreviation cannot be determined from the GMT offset,
+	    #   but the $ZONEINFO/Etc/GMT$offset file can be used - note: this disables DST.
+		((z=new_time_offset/3600));
+		((hoursWest=`printf '%+d' $z`))
+		if (( $hoursWest < 0 )); then
+		   # tzdata treats negative 'hours west' as positive 'gmtoff' !
+		   ((hoursWest*=-1));
+		fi
+		tzfile=/usr/share/zoneinfo/Etc/GMT`printf '%+d' $hoursWest`;
+		if [ -e $tzfile ]; then
+		    /bin/mv -f /etc/localtime /etc/localtime.predhclient;
+		    /bin/cp -fp $tzfile /etc/localtime;
+		    /bin/touch /etc/localtime;
+		fi;
+	    fi;
+	fi;
+	if [ "${PEERNTP}" = no ]; then
+	    :
+	elif [ -n "$new_ntp_servers" ] && [ -e /etc/ntp.conf ]; then
+	    save_previous /etc/ntp.conf
+	    /bin/egrep -v '(^[\ \	]*(server|fudge))|(generated by /sbin/dhclient-script)'< /etc/ntp.conf.predhclient > /etc/ntp.conf
+	    echo '# servers generated by /sbin/dhclient-script' >> /etc/ntp.conf
+	    localClocks=(`/bin/egrep '^[\ \	]*server[\ \	]+127\.127' /etc/ntp.conf.predhclient | while read s addr rest; do echo $addr; done`)      
+	    localClockFudge="`/bin/egrep '^[\ \	]*fudge[\ \	]+127\.127' /etc/ntp.conf.predhclient`";
+	    for s in $new_ntp_servers ${localClocks[@]};
+	      do
+	      echo 'server '$s >> /etc/ntp.conf;
+	    done
+	    echo "$localClockFudge" >> /etc/ntp.conf;
+	    if [ -x /usr/bin/diff ] && /usr/bin/diff -q /etc/ntp.conf /etc/ntp.conf.predhclient >/dev/null 2>&1; then
+		: ;
+	    else
+		/sbin/service ntpd condrestart >/dev/null 2>&1
+	    fi;
+	fi
+    fi;
+}
+
+if [ x$new_broadcast_address != x ] && [ x$new_subnet_mask != x ] && [ "$new_subnet_mask" != "255.255.255.255" ]; then
+  new_broadcast_arg="broadcast $new_broadcast_address"
+fi
+if [ x$old_broadcast_address != x ]; then
+  old_broadcast_arg="broadcast $old_broadcast_address"
+fi
+if [ x$new_subnet_mask != x ]; then
+  new_subnet_arg="netmask $new_subnet_mask"
+fi
+if [ x$old_subnet_mask != x ]; then
+  old_subnet_arg="netmask $old_subnet_mask"
+fi
+if [ x$alias_subnet_mask != x ]; then
+  alias_subnet_arg="netmask $alias_subnet_mask"
+fi
+
+if [ x$reason = xMEDIUM ]; then
+  # Linux doesn't do mediums (ok, ok, media).
+  exit_with_hooks 0
+fi
+
+added_old_broadcast_route=0;
+if [ x$reason = xPREINIT ]; then
+    if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
+	if [ x$alias_ip_address != x ]; then
+    # Bring down alias interface. Its routes will disappear too.
+	    ifconfig $interface:0- inet 0
+	fi
+	if [ x$keep_old_ip = xyes ]; then
+	    ifconfig $interface up
+	elif [ $relmajor -lt 2 ] || ( [ $relmajor -eq 2 ] && [ $relminor -eq 0 ] )   then
+	    ifconfig $interface inet 0.0.0.0 netmask 0.0.0.0 \
+		broadcast 255.255.255.255 up
+    # Add route to make broadcast work. Do not omit netmask.
+	    /sbin/ip route replace default dev $interface && added_old_broadcast_route=1;
+	else
+	    ifconfig $interface 0 up
+	fi     
+
+  # We need to give the kernel some time to get the interface up.
+  #	sleep 1
+  # I don't think this is necessary with modern kernels - no problems found during testing -
+  # JVD, 2005-06-17
+	# but just in case:
+	if [ -n "$DHCLIENT_DELAY" ] && [ "$DHCLIENT_DELAY" -gt 0 ] ; then
+	    sleep $DHCLIENT_DELAY;
+	fi;
+	exit_with_hooks 0
+    fi;
+fi
+
+if [ x$reason = xARPCHECK ] || [ x$reason = xARPSEND ]; then
+    if [ -z "$new_ip_address" ] || [ -z "$interface" ] ||  /sbin/arping -q -f -c 2 -w 3 -D -I ${interface} ${new_ip_address}; then
+	exit_with_hooks 0
+    else
+	exit_with_hooks 1
+    fi;
+fi
+  
+if [ x$reason = xBOUND ] || [ x$reason = xRENEW ] || \
+   [ x$reason = xREBIND ] || [ x$reason = xREBOOT ]; then    
+    dhconfig ;
+    exit_with_hooks 0
+fi
+
+if [ x$reason = xEXPIRE ] || [ x$reason = xFAIL ] || [ x$reason = xRELEASE ] \
+   || [ x$reason = xSTOP ]; then
+  if [ -f /etc/resolv.conf.predhclient ]; then
+     change_resolv_conf /etc/resolv.conf.predhclient
+     rm -f /etc/resolv.conf.predhclient
+  fi
+  if [ -n "$DHCP_TIME_OFFSET_SETS_TIMEZONE" ] && [[ "$DHCP_TIME_OFFSET_SETS_TIMEZONE" = [yY1]* ]]; then
+      if [ -e /etc/localtime.predhclient ]; then
+	  /bin/rm -f /etc/localtime
+	  /bin/mv -f /etc/localtime.predhclient /etc/localtime;
+	  /bin/touch /etc/localtime;
+      fi;
+  fi;
+  if [ -f /etc/ntp.conf.predhclient ]; then
+     /bin/rm -f /etc/ntp.conf
+     /bin/mv -f /etc/ntp.conf.predhclient /etc/ntp.conf
+     service ntpd condrestart >/dev/null 2>&1 
+  fi
+  if [ -f /etc/yp.conf.predhclient ]; then
+     /bin/rm -f /etc/yp.conf
+     /bin/mv -f /etc/yp.conf.predhclient /etc/yp.conf
+     level=`/sbin/runlevel`
+     level=${level##*\ }
+     if [ "$level" = "unknown" ]; then
+	 level=1;
+     fi
+     if [[ "$level" = [0-6] ]] && /sbin/chkconfig --level=$level ypbind >/dev/null 2>&1 && [ -r /var/run/ypbind.pid ] && yppid=`cat /var/run/ypbind.pid` && [ -d /proc/${yppid} ] && [ "`if [ -x /sbin/busybox ]; then /sbin/busybox readlink /proc/${yppid}/exe; else echo /sbin/ypbind; fi`" = "/sbin/ypbind" ] ; then
+	 kill -HUP $yppid;
+     fi
+  fi 
+  if [ -x /etc/dhclient-${interface}-down-hooks ]; then
+      . /etc/dhclient-${interface}-down-hooks;
+  elif [ -x /etc/dhclient-down-hooks ]; then
+      . /etc/dhclient-down-hooks;
+  fi;
+  if [ x$alias_ip_address != x ]; then
+    # Turn off alias interface.
+    ifconfig $interface:0- inet 0
+  fi
+  if [ x$old_ip_address != x ]; then
+    # Shut down interface, which will delete routes and clear arp cache.
+    ifconfig $interface inet 0 down
+  fi
+  if [ x$alias_ip_address != x ]; then
+    ifconfig $interface:0 inet $alias_ip_address $alias_subnet_arg
+    /sbin/ip route replace ${alias_ip_address}/32 $interface:0
+  fi
+  exit_with_hooks 0
+fi
+
+if [ x$reason = xTIMEOUT ] && [ "x$new_routers" != 'x' ]; then
+    if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
+	if [ x$alias_ip_address != x ]; then
+	    ifconfig $interface:0- inet 0
+	fi
+	ifconfig $interface inet $new_ip_address $new_subnet_arg \
+					$new_broadcast_arg
+    fi;
+    set $new_routers
+    if ping -q -c 1 -w 10 -I $interface $1; then
+	dhconfig ;
+	exit_with_hooks 0
+    fi
+    if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
+	ifconfig $interface inet 0 down
+    fi;
+    exit_with_hooks 1
+elif [ x$reason = xTIMEOUT ]; then
+  exit_with_hooks 1
+fi
+exit_with_hooks 0
diff --git a/linux.dbus-example b/linux.dbus-example
new file mode 100755
index 0000000..1ee9e0d
--- /dev/null
+++ b/linux.dbus-example
@@ -0,0 +1,223 @@
+#!/bin/bash
+# dhclient-script for Linux. Dan Halbert, March, 1997.
+# Updated for Linux 2.[12] by Brian J. Murrell, January 1999.
+# No guarantees about this. I'm a novice at the details of Linux
+# networking.
+
+# Notes:
+
+# 0. This script is based on the netbsd script supplied with dhcp-970306.
+
+# 1. ifconfig down apparently deletes all relevant routes and flushes
+# the arp cache, so this doesn't need to be done explicitly.
+
+# 2. The alias address handling here has not been tested AT ALL.
+# I'm just going by the doc of modern Linux ip aliasing, which uses
+# notations like eth0:0, eth0:1, for each alias.
+
+# 3. I have to calculate the network address, and calculate the broadcast
+# address if it is not supplied. This might be much more easily done
+# by the dhclient C code, and passed on.
+
+# 4. TIMEOUT not tested. ping has a flag I don't know, and I'm suspicious
+# of the $1 in its args.
+
+if [ -n "${dhc_dbus}" ]; then
+  /bin/dbus-send \
+    --system --dest=com.redhat.dhcp --type=method_call \
+    /com/redhat/dhcp/$interface com.redhat.dhcp.set \
+    'string:'"`env | /bin/egrep -v '^(PATH|SHLVL|_|PWD|dhc_dbus)\='`";
+    if (( ( dhc_dbus & 31 ) == 31 )); then
+    exit 0;
+    fi;
+fi;
+
+make_resolv_conf() {
+  if [ "x$new_domain_name" != x ] && [ x"$new_domain_name_servers" != x ]; then
+    echo search $new_domain_name >/etc/resolv.conf
+    chmod 644 /etc/resolv.conf
+    for nameserver in $new_domain_name_servers; do
+      echo nameserver $nameserver >>/etc/resolv.conf
+    done
+  fi
+}
+
+# Must be used on exit.   Invokes the local dhcp client exit hooks, if any.
+exit_with_hooks() {
+  exit_status=$1
+  if [ -f /etc/dhclient-exit-hooks ]; then
+    . /etc/dhclient-exit-hooks
+  fi
+# probably should do something with exit status of the local script
+  exit $exit_status
+}
+
+# Invoke the local dhcp client enter hooks, if they exist.
+if [ -f /etc/dhclient-enter-hooks ]; then
+  exit_status=0
+  . /etc/dhclient-enter-hooks
+  # allow the local script to abort processing of this state
+  # local script must set exit_status variable to nonzero.
+  if [ $exit_status -ne 0 ]; then
+    exit $exit_status
+  fi
+fi
+
+release=`uname -r`
+release=`expr $release : '\(.*\)\..*'`
+relminor=`echo $release |sed -e 's/[0-9]*\.\([0-9][0-9]*\)\(\..*\)*$/\1/'`
+relmajor=`echo $release |sed -e 's/\([0-9][0-9]*\)\..*$/\1/'`
+
+if [ x$new_broadcast_address != x ]; then
+  new_broadcast_arg="broadcast $new_broadcast_address"
+fi
+if [ x$old_broadcast_address != x ]; then
+  old_broadcast_arg="broadcast $old_broadcast_address"
+fi
+if [ x$new_subnet_mask != x ]; then
+  new_subnet_arg="netmask $new_subnet_mask"
+fi
+if [ x$old_subnet_mask != x ]; then
+  old_subnet_arg="netmask $old_subnet_mask"
+fi
+if [ x$alias_subnet_mask != x ]; then
+  alias_subnet_arg="netmask $alias_subnet_mask"
+fi
+
+if [ x$reason = xMEDIUM ]; then
+  # Linux doesn't do mediums (ok, ok, media).
+  exit_with_hooks 0
+fi
+
+if [ x$reason = xPREINIT ]; then
+  if [ x$alias_ip_address != x ]; then
+    # Bring down alias interface. Its routes will disappear too.
+    ifconfig $interface:0- inet 0
+  fi
+  if [ $relmajor -lt 2 ] || ( [ $relmajor -eq 2 ] && [ $relminor -eq 0 ] )
+   then
+    ifconfig $interface inet 0.0.0.0 netmask 0.0.0.0 \
+		broadcast 255.255.255.255 up
+    # Add route to make broadcast work. Do not omit netmask.
+    route add default dev $interface netmask 0.0.0.0
+  else
+    ifconfig $interface 0 up
+  fi
+
+  # We need to give the kernel some time to get the interface up.
+  sleep 1
+
+  exit_with_hooks 0
+fi
+
+if [ x$reason = xARPCHECK ] || [ x$reason = xARPSEND ]; then
+  exit_with_hooks 0
+fi
+  
+if [ x$reason = xBOUND ] || [ x$reason = xRENEW ] || \
+   [ x$reason = xREBIND ] || [ x$reason = xREBOOT ]; then
+  current_hostname=`hostname`
+  if [ x$current_hostname = x ] || \
+     [ x$current_hostname = x$old_host_name ]; then
+    if [ x$current_hostname = x ] || \
+       [ x$new_host_name != x$old_host_name ]; then
+      hostname $new_host_name
+    fi
+  fi
+
+  if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
+  if [ x$old_ip_address != x ] && [ x$alias_ip_address != x ] && \
+		[ x$alias_ip_address != x$old_ip_address ]; then
+    # Possible new alias. Remove old alias.
+    ifconfig $interface:0- inet 0
+  fi
+  if [ x$old_ip_address != x ] && [ x$old_ip_address != x$new_ip_address ]; then
+    # IP address changed. Bringing down the interface will delete all routes,
+    # and clear the ARP cache.
+    ifconfig $interface inet 0 down
+
+  fi
+  fi
+  if [ x$old_ip_address = x ] || [ x$old_ip_address != x$new_ip_address ] || \
+     [ x$reason = xBOUND ] || [ x$reason = xREBOOT ]; then
+  if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
+    ifconfig $interface inet $new_ip_address $new_subnet_arg \
+							$new_broadcast_arg
+  fi
+  if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 4 ) != 4 )); then
+    # Add a network route to the computed network address.
+    if [ $relmajor -lt 2 ] || \
+		( [ $relmajor -eq 2 ] && [ $relminor -eq 0 ] ); then
+      route add -net $new_network_number $new_subnet_arg dev $interface
+    fi
+    for router in $new_routers; do
+      route add default gw $router
+    done
+  fi
+  fi
+  if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
+  if [ x$new_ip_address != x$alias_ip_address ] && [ x$alias_ip_address != x ];
+   then
+    ifconfig $interface:0- inet 0
+    ifconfig $interface:0 inet $alias_ip_address $alias_subnet_arg
+    route add -host $alias_ip_address $interface:0
+  fi
+  fi
+  if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 1 ) != 1 )); then
+  make_resolv_conf
+  fi
+  exit_with_hooks 0
+fi
+
+if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
+if [ x$reason = xEXPIRE ] || [ x$reason = xFAIL ] || [ x$reason = xRELEASE ] \
+   || [ x$reason = xSTOP ]; then
+  if [ x$alias_ip_address != x ]; then
+    # Turn off alias interface.
+    ifconfig $interface:0- inet 0
+  fi
+  if [ x$old_ip_address != x ]; then
+    # Shut down interface, which will delete routes and clear arp cache.
+    ifconfig $interface inet 0 down
+  fi
+  if [ x$alias_ip_address != x ]; then
+    ifconfig $interface:0 inet $alias_ip_address $alias_subnet_arg
+    route add -host $alias_ip_address $interface:0
+  fi
+  exit_with_hooks 0
+fi
+fi
+
+if [ x$reason = xTIMEOUT ]; then
+  if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
+  if [ x$alias_ip_address != x ]; then
+    ifconfig $interface:0- inet 0
+  fi
+  ifconfig $interface inet $new_ip_address $new_subnet_arg \
+					$new_broadcast_arg
+  fi
+  set $new_routers
+  ############## what is -w in ping?
+  if ping -q -c 1 $1; then
+    if [ x$new_ip_address != x$alias_ip_address ] && \
+			[ x$alias_ip_address != x ]; then
+      ifconfig $interface:0 inet $alias_ip_address $alias_subnet_arg
+      route add -host $alias_ip_address dev $interface:0
+    fi
+    if [ $relmajor -lt 2 ] || \
+		( [ $relmajor -eq 2 ] && [ $relminor -eq 0 ] ); then
+      route add -net $new_network_number
+    fi
+    for router in $new_routers; do
+      route add default gw $router
+    done
+    make_resolv_conf
+    exit_with_hooks 0
+  fi
+  if [ -z "${dhc_dbus}" ] || (( ( dhc_dbus & 2 ) != 2 )); then
+  ifconfig $interface inet 0 down
+  fi
+  exit_with_hooks 1
+fi
+
+exit_with_hooks 0