pfSense

#!/bin/sh

# $FreeBSD: src/sbin/dhclient/dhclient-script,v 1.4 2005/06/10 03:41:18 brooks Exp $

#

# Copyright (c) 2003 Kenneth R Westerback <krw@openbsd.org>

#

# Permission to use, copy, modify, and distribute this software for any

# purpose with or without fee is hereby granted, provided that the above

# copyright notice and this permission notice appear in all copies.

#

# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

#

HOSTNAME=/bin/hostname

ARP=/usr/sbin/arp

if [ -x /usr/bin/logger ]; then

# Helper functions that implement common actions.

#

check_hostname() {

	   [ "$current_hostname" = "$old_host_name" -a \

	     "$new_hostname" != "$old_host_name" ]; then

		$HOSTNAME $new_host_name

	fi

arp_flush() {

		$SED -n -e 's/^.*(\(.*\)) at .*$/arp -d \1/p' | \

		/bin/sh >/dev/null 2>&1

# unnecessarily killed states in multiple circumstances. Leaving here for now, should be safe

# to remove later.  -cmb 20141105

	if [ -f /var/db/${interface}_ip ]; then

		if [ -n "${OLD_IP}" ] && [ "${OLD_IP}" != "${new_ip_address}" ]; then

			$LOGGER "Removing states from old IP '${OLD_IP}' (new IP '${new_ip_address}')"

			${PFCTL} -K ${OLD_IP}/32

			_FLUSHED=1

	fi

	# Delete states through old gateway if it's not the same

	elif [ -f /tmp/${interface}_router ]; then

		OLD_ROUTER=`cat /tmp/${interface}_router`

	fi

}

add_new_address() {

	$LOGGER "ifconfig $interface inet $new_ip_address netmask $new_subnet_mask broadcast $new_broadcast_address $medium"

		netmask $new_subnet_mask \

		broadcast $new_broadcast_address \

		$medium

	$LOGGER "New Subnet Mask ($interface): $new_subnet_mask"

	$LOGGER "New Broadcast Address ($interface): $new_broadcast_address"

	$LOGGER "New Routers ($interface): $new_routers"

	fi

delete_old_alias() {

	if [ -n "$alias_ip_address" ]; then

}

add_new_alias() {

	if [ -n "$alias_ip_address" ]; then

}

	set $1

	while [ $# -ge 5 ]; do

		if [ $1 -eq 0 ]; then

			route="default"

		elif [ $1 -le 8 ]; then

			route="$2.0.0.0/$1"

			shift

		elif [ $1 -le 16 ]; then

			route="$2.$3.0.0/$1"

			shift; shift

		elif [ $1 -le 24 ]; then

			route="$2.$3.$4.0/$1"

			shift; shift; shift

		else

			route="$2.$3.$4.$5/$1"

			shift; shift; shift; shift

		fi

		shift

		router="$1.$2.$3.$4"

		classless_routes="$classless_routes $route $router"

		shift; shift; shift; shift

	done

}

	if [ -n "$old_classless_routes" ]; then

		fill_classless_routes "$old_classless_routes"

		set $classless_routes

		while [ $# -gt 1 ]; do

			route delete "$1" "$2"

			shift; shift

		done

		return 0;

	fi

			#  cleans up our route to a gateway possibly outside of the assigned subnet

			$ROUTE delete -host $router -iface $interface

			/bin/rm -f /tmp/${interface}_router

	fi

	if [ -n "$old_static_routes" ]; then

		set $old_static_routes

		while [ $# -gt 1 ]; do

	fi

	arp_flush

}

add_new_routes() {

	# Routes option and a Router option, the DHCP client MUST ignore

	# the Router option.

	#

	# DHCP clients that support this option (Classless Static Routes)

	# MUST NOT install the routes specified in the Static Routes

	# option (option code 33) if both a Static Routes option and the

	# Classless Static Routes option are provided.

	if [ -n "$new_classless_routes" ]; then

		fill_classless_routes "$new_classless_routes"

		$LOGGER "New Classless Static Routes ($interface): $classless_routes"

		set $classless_routes

		while [ $# -gt 1 ]; do

			if [ "0.0.0.0" = "$2" ]; then

				route add "$1" -iface "$interface"

			else

				route add "$1" "$2"

			fi

			shift; shift

		done

		return

	fi

				echo $ROUTE add default -iface $interface | $LOGGER

				if [ "$new_ip_address" = "$router" ]; then

					echo $router > /tmp/${interface}_router

				fi

				#  this will not cause any harm if the router is within the subnet

				#  but it will prevent route troubles if the router is outside of the subnet

				#  this is useful for captive subnets or similar gateway out-of-subnet situations

				$ROUTE add -host $router -iface $interface

				echo $ROUTE add -host $router -iface $interface | $LOGGER

				echo $ROUTE add default $router | $LOGGER

			# stop processing the list after the first one.

			break

		done

	fi

	if [ -n "$new_static_routes" ]; then

		$LOGGER "New Static Routes ($interface): $new_static_routes"

		set $new_static_routes

		while [ $# -gt 1 ]; do

		done

	fi

}

add_new_resolv_conf() {

		for nameserver in `cat /var/etc/nameserver_$interface`; do

			# so that mulitple wans work correctly with multiple dns

			# also backup the nameserver for later route removal

notify_rc_newwanip() {

# Start of active code.

#

if [ -f /etc/dhclient-enter-hooks ]; then

	. /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

MEDIUM)

	$IFCONFIG $interface inet -alias 0.0.0.0 $medium >/dev/null 2>&1

	delete_old_alias

	;;

	check_hostname

		   [ "$old_ip_address" != "$alias_ip_address" ]; then

		if [ "$old_ip_address" != "$new_ip_address" ]; then

	fi

	if [ "$reason" = BOUND ] || \

	   [ "$reason" = REBOOT ] || \

	   [ -z "$old_ip_address" ] || \

	   [ "$old_ip_address" != "$new_ip_address" ]; then

		add_new_address

		add_new_routes

       [ "$new_ip_address" != "$alias_ip_address" ]; then

	add_new_resolv_conf

		notify_rc_newwanip

	fi

	if [ -n "$old_ip_address" ]; then

	fi

	;;

	delete_old_alias

	add_new_address

		$LOGGER "New Routers ($interface): $new_routers"

		set "$new_routers"

				add_new_alias

			fi

			add_new_routes

			if add_new_resolv_conf; then

		fi

	fi

	;;

esac

if [ -f /etc/dhclient-exit-hooks ]; then

	$LOGGER "dhclient-exit-hooks"

	exit_status=0

	. /etc/dhclient-exit-hooks

	# allow the local script to abort processing of this state

	# local script must set exit_status variable to nonzero.

	exit $exit_status

fi