ipv6

#!/bin/bash
### BEGIN INIT INFO
# Provides:          ipv6-start
# Required-Start:    $remote_fs $syslog $network $named $all
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start daemon at boot time
# Description:       Enable service provided by daemon.
### END INIT INFO
Pidfile=/run/dhclient6.eth0.pid
IP=2001:bc8:2782:100::/56
IPS=2001:bc8:2782:100::
if [ -f $Pidfile ]
then
        Pid=`cat $Pidfile`
fi

case "$1" in
'start')
        if [ -f $Pidfile ] ; then
                        if test `ps -e | grep -c $Pid` = 1; then
                                        echo "dhclient is already running"
                        else
                                        echo "Starting dhclient"
                                        dhclient -1 -cf /etc/dhcp/dhclient6.conf -pf $Pidfile -v -nw -6 -P vmbr0 &> /dev/null
                                        ip -6 addr add $IP dev vmbr0
                                        ip -6 route add $IP dev vmbr0
                                        ip -6 route add default via $IPS
                                        fi
        else
                        echo "Starting dhclient"
                        dhclient -1 -cf /etc/dhcp/dhclient6.conf -pf $Pidfile -v -nw -6 -P vmbr0 &> /dev/null
                        ip -6 addr add $IP dev vmbr0
                        ip -6 route add $IP dev vmbr0
                        ip -6 route add default via $IPS
        fi
        ;;

'stop')
                if [ -f $Pidfile ] ; then
                                echo "stopping dhclient"
                                dhclient -x -pf $Pidfile
                                ip -6 route del default via $IPS
                                ip -6 route del $IP dev vmbr0
                else
                                echo "Cannot stop dhclient - no Pidfile found!"
                fi
                ;;

'restart')
                $0 stop
                sleep 5
                $0 start
                ;;

'status')
                if [ -f $Pidfile ] ; then
                                if test `ps -e | grep -c $Pid` = 0; then
                                                echo "dhclient not running"
                                else
                                                echo "dhclient running with PID: [$Pid]"
                                fi
                else
                                echo "$Pidfile does not exist! Cannot process dhclient status!"
                                exit 1
                fi
                ;;

*)
                echo "usage: $0 { start | stop | restart | status }"
                ;;

esac
exit 0