#!/bin/sh /etc/rc.common

. $IPKG_INSTROOT/lib/functions/network.sh

START=90

PIDPATH=/var/run
tunnel_id=1

missing() {
	echo "Not starting tunneldigger - missing $1" >&2
}

config_cb() {
	local cfg="$CONFIG_SECTION"
	config_get configname "$cfg" TYPE
	case "$configname" in
		broker)
			config_get_bool enabled "$cfg" enabled 1
			config_get addresses "$cfg" address
			config_get uuid "$cfg" uuid
			config_get interface "$cfg" interface
			config_get group "$cfg" group
			config_get limit_bw_down "$cfg" limit_bw_down
			config_get hook_script "$cfg" hook_script
			config_get bind_interface "$cfg" bind_interface
			config_get broker_selection "$cfg" broker_selection
			
			[ $enabled -eq 0 ] && return

			local broker_opts=""
			for address in $addresses; do
			  append broker_opts "-b ${address}"
			done

			[ ! -z "${limit_bw_down}" ] && append broker_opts "-L ${limit_bw_down}"
			[ ! -z "${hook_script}" ] && append broker_opts "-s ${hook_script}"
			[ ! -z "${bind_interface}" ] && {
				# Resolve logical interface name.
				unset _bind_interface
				network_get_device _bind_interface "${bind_interface}" || _bind_interface="${bind_interface}"
				append broker_opts "-I ${_bind_interface}"
			}
			[ ! -z "${broker_selection}" ] && {
				# Set broker selection.
				case "${broker_selection}" in
					usage)
						append broker_opts "-a"
					;;
					first)
						append broker_opts "-g"
					;;
					random)
						append broker_opts "-r"
					;;
				esac
			}

			if [ -z "$uuid" ]; then
				missing uuid
				return
			elif [ -z "$interface" ]; then
				missing interface
				return
			fi

			echo "Starting tunneldigger on ${interface}"
			/sbin/start-stop-daemon -S -q -b -m -c root:${group} -p ${PIDPATH}/tunneldigger.${interface}.pid -x /usr/bin/tunneldigger -- -u ${uuid} -i ${interface} -t ${tunnel_id} ${broker_opts}

			let tunnel_id++
		;;
	esac
}

start() {
	config_load tunneldigger
}

stop() {
	for PIDFILE in `find ${PIDPATH}/ -name "tunneldigger\.*\.pid"`; do
		PID="$(cat ${PIDFILE})"
		IFACE="$(echo ${PIDFILE} | awk -F\/tunneldigger '{print $2}' | cut -d'.' -f2)"
		echo "Stopping tunneldigger for interface ${IFACE}"
		start-stop-daemon -K -q -p $PIDFILE 
		while test -d "/proc/${PID}"; do
			echo "  waiting for tunneldigger to stop"
			sleep 1
		done
		echo "  tunneldigger stopped"
	done
}

restart() {
	stop
	start
}