ACC SHELL

#!/bin/bash
#
# Copyright (c) 2002-2003 SuSE Linux AG Nuernberg, Germany.
# All rights reserved.
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation; either version 2 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 59 Temple
# Place, Suite 330, Boston, MA 02111-1307 USA
#
# Author: Peter Poeml <poeml@suse.de>
#
# $Id$


#
# Hook script for dhcpcd (the DHCP client)
# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
#
# It is called when an interface is brought "up", "down", or the IP address has
# changed ("new").
#
# It calls "ifup <interface> -o dhcp", which does the following:
#
#  - set up routing according to /etc/sysconfig/network/ifroute-* 
#    (where you can configure routes per interface)
#
#  - execute /etc/sysconfig/network/if-{up,down}.d/*
#    (where you can place your own scripts)
#
#  - execute POST_UP scripts defined in /etc/sysconfig/network/ifcfg-* 
#    (see "man 8 ifup")
#
# Thus, those are the hooks where you can add stuff.


#  The following parameters are passed to this script by dhcpcd:
#  $1 = HostInfoFilePath, e.g  "/var/lib/dhcpcd/dhcpcd-eth0.info"
#  $2 = "up" if interface has been configured with the same
#       IP address as before reboot;
#  $2 = "down" if interface has been shut down;
#  $2 = "new" if interface has been configured with new IP address;
#  $3 (optional) = "-d" debug flag passed if dhcpcd daemon has been
#       invoked with "-d" flag



my_name=${0##*/}

# log_err="logger -s -t $my_name -p daemon.err"
# log_dbg="logger -s -t $my_name -p daemon.debug"
log_err="logger -t $my_name -p daemon.err"
log_dbg="logger -t $my_name -p daemon.debug"

if [ $# -lt 2 ]; then
	$log_err "wrong usage"
	exit 1
fi

leaseinfo="$1"
state="$2"
debug="$3"
action=""

if [ -r /etc/sysconfig/network/scripts/functions ] ; then
	. /etc/sysconfig/network/scripts/functions
fi
if [ -r /etc/sysconfig/network/config ] ; then
	. /etc/sysconfig/network/config
fi
if [ -r /etc/sysconfig/network/dhcp ] ; then
	. /etc/sysconfig/network/dhcp
fi
if [ "x$debug" != "x" -o "$DHCLIENT_DEBUG" = yes ] ; then
	debug=true
	$log_dbg "State: $state. Leaseinfo: ${leaseinfo:-<none given>}"
else
	debug=false
fi

# it is possible that the leaseinfo file does not exist:
#  - when it has never been written (since a lease was never acquired)
#  - when deleted manually
# in this case, we don't even know which interface is concerned, and
# there's nothing to do about it.
# (in the 'leaseinfo does not exist case' the interface can still be 
# guessed from the name, but I doubt it's useful to run ifdown then)
if test -z "$leaseinfo" ; then
	test "$state" == "new" && state=renew
	$log_dbg "Skipping 'if$state $INTERFACE -o dhcp' call"
	exit 0
fi
if ! test -r "$leaseinfo" ; then
	test "$state" == "new" && state=renew
	$log_dbg "$leaseinfo does not exist. Skipping 'if$state $INTERFACE -o dhcp' call"
	exit 0
fi



while read line; do
	case "$line" in
		INTERFACE*|IPADDR*) eval $line;;
	esac
done < $leaseinfo

hostname_changed()
{
	# check regardless the DHCLIENT_SET_HOSTNAME setting,
	# because if it changed, we've to handle it anyway...

	# read the previous hostname from state file, when it
	# differs with current one, update the state and report.
	OLD_HOSTNAME=`read_cached_config_data hostname $INTERFACE`
	CUR_HOSTNAME=`hostname 2>/dev/null`
	if test "x$OLD_HOSTNAME" != "x$CUR_HOSTNAME" ; then
		write_cached_config_data hostname "$CUR_HOSTNAME" $INTERFACE
		commit_cached_config_data $INTERFACE
		return 0
	else
		return 1
	fi
}

case $state in
up)
	write_cached_config_data  dhcp4_state up       $INTERFACE
	commit_cached_config_data                      $INTERFACE

	$debug && NC_OPTIONS="-v"
	/sbin/netconfig modify -s "dhcpcd" \
		-i $INTERFACE $NC_OPTIONS  \
		-l $leaseinfo 2>&1 | $log_dbg

	;;
down)
	write_cached_config_data  dhcp4_state down     $INTERFACE
	commit_cached_config_data                      $INTERFACE

	# We now call PRE_DOWN_SCRIPT directly from ifdown, because it was called
	# POST from here (after IP address was removed). Thus we don't need this
	# $debug && $log_dbg "Running ifdown $INTERFACE -o dhcp"
	# ifdown $INTERFACE -o dhcp

	$debug && NC_OPTIONS="-v"
	/sbin/netconfig remove -s "dhcpcd" \
		-i $INTERFACE $NC_OPTIONS  \
		2>&1 | $log_dbg
	;;
new)
	write_cached_config_data  dhcp4_state new      $INTERFACE
	commit_cached_config_data                      $INTERFACE

	$debug && $log_dbg "new IP address: $IPADDR"

	$debug && NC_OPTIONS="-v"
	/sbin/netconfig modify -s "dhcpcd" \
		-i $INTERFACE $NC_OPTIONS  \
		< $leaseinfo 2>&1 | $log_dbg

	$debug && $log_dbg "Running ifdown $INTERFACE -o dhcp"
	ifdown $INTERFACE -o dhcp
	;;
complete)
	# dhcpcd finished all requested configuration steps ...
	# check if hostname changed and reload syslog when needed
	if hostname_changed ; then
		# reload syslog so it knows the new hostname
		/etc/init.d/syslog reload
	fi

	$debug && $log_dbg "Running ifup $INTERFACE -o dhcp"
	ifup $INTERFACE -o dhcp

	$debug && $log_dbg "DHCP4 configuration of $INTERFACE is complete"

	write_cached_config_data  dhcp4_state complete $INTERFACE
	commit_cached_config_data                      $INTERFACE
	;;
esac


exit 0