#!/bin/sh

DAEMON=radvd
. /etc/init.d/modlibrc

config() {
	modlib_config
}

start_ipv6_interface() {
	local disable_ipv6="/proc/sys/net/ipv6/conf/${RADVD_INTERFACE}/disable_ipv6"
	if [ -e $disable_ipv6 -a "$(cat $disable_ipv6 2>/dev/null)" != "0" ]; then
		ifconfig ${RADVD_INTERFACE} down
		echo 0 > $disable_ipv6
		ifconfig ${RADVD_INTERFACE} up
	fi
	if [ "$RADVD_SETIPV6" == "yes" ]; then
		ip -6 addr show dev $RADVD_INTERFACE | grep $RADVD_ADDRESS > /dev/null 2>&1
		if [ $? -eq 0 ]; then
			echo 'Set IPv6 address: $RADVD_ADDRESS ... already set.'
		else
			ip -6 addr add $RADVD_ADDRESS dev $RADVD_INTERFACE
		fi
	fi
	[ "$RADVD_FORWARD" == "yes" ] && echo 2>/dev/null 1 > /proc/sys/net/ipv6/conf/all/forwarding
}

stop_ipv6_interface() {
	if [ "$RADVD_SETIPV6" == "yes" ]; then
		ip -6 addr show dev $RADVD_INTERFACE | grep $RADVD_ADDRESS > /dev/null 2>&1
		if [ $? -eq 0 ]; then
			ip -6 addr del $RADVD_ADDRESS dev $RADVD_INTERFACE
		else
			echo -n 'IPv6 address already unset ... '
		fi
	fi
	[ "$RADVD_FORWARD" == "yes" ] && echo 2>/dev/null 0 > /proc/sys/net/ipv6/conf/all/forwarding
}

start() {
	start_ipv6_interface
	modlib_startdaemon $DAEMON -C $DAEMON_CONFIG
}

stop_post() {
	stop_ipv6_interface
}

case $1 in
	""|load)
		modreg cgi 'radvd' 'radvd'
		modreg daemon $DAEMON

		modlib_start $RADVD_ENABLED
		;;
	unload)
		modunreg daemon $DAEMON
		modunreg cgi 'radvd'
		modlib_stop
		;;
	start)
		modlib_start
		;;
	stop)
		modlib_stop
		;;
	restart)
		modlib_restart
		;;
	status)
		modlib_status
		;;
	remove)
		stop_ipv6_interface
		;;
	*)
		echo "Usage: $0 [load|unload|start|stop|remove|restart|status]" 1>&2
		exit 1
		;;
esac

exit 0