#!/bin/sh

DAEMON=multid
DAEMON_LONG_NAME="AVM multid"
CONF_NAME=avm
. /etc/init.d/modlibrc

TMPFILE_IGD=/tmp/.multid.igd
TMPFILE_NTP=/tmp/.multid.ntp

# include environment required for multid restart
[ -r /var/env.cache ] && . /var/env.cache

start() {
	echo -n "Starting ${DAEMON_LONG_NAME} ... "

	if [ -e $TMPFILE_IGD ]; then
		DAEMON_CMD_IGD=$(cat $TMPFILE_IGD)
	else
		if [ ! -e /sbin/igdd -a ! -e /sbin/upnpd ]; then
			DAEMON_CMD_IGD="$(multid -? 2>&1 | grep "upnp" | grep -v "plugins" | sed 's/^[ \t]*//' | cut -c 1-3)"
		fi
		echo "$DAEMON_CMD_IGD" > $TMPFILE_IGD
	fi

	if [ -e $TMPFILE_NTP ]; then
		DAEMON_CMD_NTP=$(cat $TMPFILE_NTP)
	else
		if [ -e "/usr/sbin/ntpd" -o -e "/sbin/chronyd" ]; then
			DAEMON_CMD_NTP="$(multid -? 2>&1 | grep "NTP" | sed 's/^[ \t]*//' | cut -c 1-3 | sed 's/ //')"
		fi
		echo "$DAEMON_CMD_NTP" > $TMPFILE_NTP
	fi

	#save ipv6 for 'lan' (since fw 04.86)
	if [ -e /proc/sys/net/ipv6/conf/lan/disable_ipv6 ]; then
		local addresses_ipv6_lan="$(ip -6 addr show dev lan | sed -n 's/.*inet6 \(.*\)scope global.*/\1/p')"
		local disable_ipv6_lan="$(cat /proc/sys/net/ipv6/conf/lan/disable_ipv6)"
	fi

	rm -rf /var/tmp/avm-resolv.conf /var/tmp/resolv.conf 2>/dev/null
	$DAEMON $DAEMON_CMD_IGD $DAEMON_CMD_NTP
	exitval=$?
	sleep 1
	[ -f /tmp/flash/mod/multid.start ] && . /tmp/flash/mod/multid.start

	#load ipv6 for 'lan' (since fw 04.86)
	if [ -n "$disable_ipv6_lan" ]; then
		if [ "$(cat /proc/sys/net/ipv6/conf/lan/disable_ipv6)" != "$disable_ipv6_lan" ]; then
			ifconfig lan down
			echo $disable_ipv6_lan > /proc/sys/net/ipv6/conf/lan/disable_ipv6
			ifconfig lan up
		fi
		for address_ipv6_lan in $addresses_ipv6_lan; do
			ip -6 addr add $address_ipv6_lan dev lan 2>/dev/null
		done
	fi

	# overwrite upstream-dnsserver for avm-daemons like multid (dnsserver) or voipd
	if [ -n "$AVM_MULTID_DNS" ]; then
		echo > /var/tmp/avm-resolv.conf
		for dnsserver in $AVM_MULTID_DNS; do
			echo "nameserver $dnsserver" >>/var/tmp/avm-resolv.conf
		done
		cat /var/tmp/avm-resolv.conf > /var/tmp/resolv.conf
	fi
	# do we have another local dns-sever? multid doesn't create /var/tmp/avm-resolv.conf itself if port 53 is in use.
	# some (older?) boxes uses /var/tmp/resolv.conf for upstream-dnsserver.
	for resolv_file in /var/tmp/avm-resolv.conf /var/tmp/resolv.conf; do
		[ ! -e $resolv_file ] && echo "nameserver 127.0.0.1" > $resolv_file
	done

	if [ "$exitval" -eq 0 ]; then
		echo 'done.'
	else
		echo 'failed.'
		exit $exitval
	fi
}

stop() {
	$DAEMON -s
}

ntp_mode() {
	DAEMON_CMD_NTP_OLD="$(cat $TMPFILE_NTP 2>/dev/null)"
	[ "$1" == "ntp_disable" ] && DAEMON_CMD_NTP_NEW="$(multid -? 2>&1 | grep "NTP" | sed 's/^[ \t]*//' | cut -c 1-3 | sed 's/ //')"
	if [ "$DAEMON_CMD_NTP_OLD" != "$DAEMON_CMD_NTP_NEW" ]; then
		echo "$DAEMON_CMD_NTP_NEW" > $TMPFILE_NTP
		[ "$(modlib_status)" != "stopped" ] && modlib_restart
	fi
}

case $1 in
	""|load)
		modreg daemon -p avm multid
		;;
	unload)
		modunreg daemon avm multid
		;;
	start)
		modlib_start
		;;
	stop)
		modlib_stop
		;;
	restart)
		modlib_restart
		;;
	status)
		modlib_status
		;;
	ntp_*)
		ntp_mode $1
		;;
	*)
		echo "Usage: $0 [start|stop|restart|status|ntp_enable|ntp_disable]" 1>&2
		exit 1
		;;
esac

exit 0