#!/bin/sh

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

TMPFILE="/tmp/.multid."

[ -r /etc/options.cfg ] && . /etc/options.cfg
# 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 ${TMPFILE}IGD)
	else
		if [ "$FREETZ_AVMDAEMON_DISABLE_IGD" == "y" ]; then
			DAEMON_CMD_IGD="$(multid -? 2>&1 | sed -nr 's/^[ \t]*([^ ]*).*upnp.[^p][^l][^u][^g].*/\1/p')"
		fi
		echo "$DAEMON_CMD_IGD" > ${TMPFILE}IGD
	fi

	if [ -e ${TMPFILE}NTP ]; then
		DAEMON_CMD_NTP=$(cat ${TMPFILE}NTP)
	else
		if [ "$FREETZ_AVMDAEMON_DISABLE_NTP" == "y" ]; then
			DAEMON_CMD_NTP="$(multid -? 2>&1 | sed -nr 's/^[ \t]*([^ ]*).*NTP client.*/\1/p')"
		fi
		echo "$DAEMON_CMD_NTP" > ${TMPFILE}NTP
	fi

	if [ -e ${TMPFILE}IGM ]; then
		DAEMON_CMD_IGM=$(cat ${TMPFILE}IGM)
	else
		if [ "$FREETZ_AVMDAEMON_DISABLE_IGM" == "y" ]; then
			DAEMON_CMD_IGM="$(multid -? 2>&1 | sed -nr 's/^[ \t]*([^ ]*).*IGMP proxy.*/\1/p')"
		fi
		echo "$DAEMON_CMD_IGM" > ${TMPFILE}IGM
	fi

	if [ -e ${TMPFILE}069 ]; then
		DAEMON_CMD_069=$(cat ${TMPFILE}069)
	else
		if [ "$FREETZ_AVMDAEMON_DISABLE_TR069" == "y" ]; then
			DAEMON_CMD_069="$(multid -? 2>&1 | sed -nr 's/^[ \t]*([^ ]*).*without tr069.*/\1/p')"
		fi
		echo "$DAEMON_CMD_069" > ${TMPFILE}069
	fi

	#save ipv6 for 'lan' (since fw 04.86)
	if [ -e /proc/sys/net/ipv6/conf/lan/disable_ipv6 ]; then
		local addresses_ipv6_lan="$(ifconfig lan | sed -rn 's/.*inet6 addr: (.*) Scope:Global/\1/p')"
		local disable_ipv6_lan="$(cat /proc/sys/net/ipv6/conf/lan/disable_ipv6)"
	fi

	rm -rf /var/tmp/avm-resolv.conf /var/tmp/resolv.conf 2>/dev/null
	if [ "$FREETZ_AVMDAEMON_DISABLE_MULTIDPORTS" == "y" ]; then
		local _resolv_conf_dns="$(modconf value MOD_RESOLV_DNS mod 2>/dev/null)"
		local _bind_enabled="$(modconf value BIND_ENABLED bind 2>/dev/null)"
		local _dnsmasq_enabled="$(modconf value DNSMASQ_ENABLED dnsmasq 2>/dev/null)"
		if [ "$_resolv_conf_dns" == "127.0.0.1" -a "$_bind_enabled" != yes -a "$_dnsmasq_enabled" != yes ]; then
			echo -n "discarded libmultid, no enabled dns server ... "
		else
			export LD_PRELOAD=libmultid.so
		fi
	fi
	$DAEMON_BIN $DAEMON_CMD_IGD $DAEMON_CMD_NTP $DAEMON_CMD_069 $DAEMON_CMD_IGM
	exitval=$?
	unset LD_PRELOAD
	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
			ifconfig lan add $address_ipv6_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_BIN -s
}

reload() {
	$DAEMON_BIN -I
}

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

exit 0