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#! /bin/sh
# miredo 	Teredo IPv6 tunneling through NATs
#
# chkconfig: - 46 69
# description:	Miredo daemon for tunneling of IPv6 through NAT \
#               within UDP/IPv4, as specified by the Teredo mechanism.
# processname: miredo
# config: /etc/miredo/miredo.conf
# pidfile: /var/run/miredo.pid
#
### BEGIN INIT INFO
# Provides:          miredo
# Required-Start:    $local_fs $remote_fs $network $syslog
# Required-Stop:     $local_fs $remote_fs $syslog
# Should-Start:      $time $syslog
# Should-Stop:       $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Teredo IPv6 tunnel
# Description:       Miredo daemon for tunneling of IPv6 through NAT
#                    within UDP/IPv4, as specified by the Teredo mechanism.
### END INIT INFO

PATH=/usr/sbin:/usr/bin:/sbin:/bin
NAME=miredo
DAEMON=/usr/sbin/$NAME
DAEMON_ARGS=""
DAEMON_USER="_miredo"
PIDFILE=/var/run/$NAME.pid
LOCKFILE=/var/lock/subsys/$NAME
CHECKCONF="${DAEMON}-checkconf"

[ -x "$DAEMON" ] || exit 0

# Do not load RH compatibility interface.
WITHOUT_RC_COMPAT=1

# Source function library.
. /etc/init.d/functions

# Source defaults.
SourceIfExists /etc/sysconfig/$NAME

# Ensure configuration is readable.
[ -r /etc/miredo/$NAME.conf ] || exit 0

check_start() {
	if [ "x$START_MIREDO" != "xtrue" ]; then
		echo "START_MIREDO is set to false in /etc/sysconfig/$NAME."
		echo "$DAEMON not starting."
		exit 0
	fi
	if [ `uname -s` = Linux ]; then
		if [ -e /proc/sys/kernel/modprobe ]; then
			`cat /proc/sys/kernel/modprobe` tun 2>/dev/null
			`cat /proc/sys/kernel/modprobe` ipv6 2>/dev/null
		fi
		sleep 1s
		if [ ! -e /dev/net/tun ]; then
			echo "/dev/net/tun does not exist."
			echo "$DAEMON cannot be started."
			exit 0
		fi
	elif [ `uname -s` = GNU/kFreeBSD ]; then
		if ! kldstat | grep if_tun; then
			kldload if_tun
		fi
	fi
}

check_conf_file() {
	if ! "$CHECKCONF" $DAEMON_ARGS; then
		echo "Cannot reload miredo: fix /etc/miredo/$NAME.conf first."
		exit 1
	fi
}

start()
{
	check_start
	start_daemon --pidfile "$PIDFILE" --lockfile "$LOCKFILE" \
		--expect-user "$DAEMON_USER" -- "$DAEMON" $DAEMON_ARGS
	RETVAL=$?
	return $RETVAL
}

stop()
{
	stop_daemon --pidfile "$PIDFILE" --lockfile "$LOCKFILE" -- "$DAEMON"
	RETVAL=$?
	return $RETVAL
}

restart()
{
	check_start # avoid stopping if would not restart
	check_conf_file
	stop
	sleep 1s
	start
}

reload()
{
	msg_reloading miredo
	stop_daemon --pidfile "$PIDFILE" --expect-user "$DAEMON_USER" -HUP -- "$DAEMON"
	RETVAL=$?
	return $RETVAL
} 

# See how we were called.
case "$1" in
	start|force-start)
		[ "x$1" = "xforce-start" ] && START_MIREDO=true
		start
		;;
	stop)
		stop
		;;
	reload)
		reload
		;;
	restart)
		restart
		;;
	condstop)
		if [ -e "$LOCKFILE" ]; then
			stop
		fi
		;;
	condrestart)
		if [ -e "$LOCKFILE" ]; then
			restart
		fi
		;;
	condreload)
		if [ -e "$LOCKFILE" ]; then
			reload
		fi
		;;
	status)
		status --pidfile "$PIDFILE" -- "$DAEMON"
		RETVAL=$?
		;;
	*)
		msg_usage "${0##*/} {start|force-start|stop|reload|restart|condstop|condrestart|condreload|status}"
		RETVAL=1
esac

exit $RETVAL