#!/bin/bash
#
# ntpd		This shell script takes care of starting and stopping
#		trust_router.
#
# chkconfig: - 58 74
# description: trust_router is the GSS-EAP trust routing daemon. \
# GSS-EAP is an IETF standard for providing authentication across \
# an insecure WAN. \

### BEGIN INIT INFO
# Provides: trust_router
# Required-Start: $network $local_fs $remote_fs
# Required-Stop: $network $local_fs $remote_fs
# Should-Start: $syslog $named ntpdate
# Should-Stop: $syslog $named
# Short-Description: start and stop trust_router
# Description: trust_router is the GSS-EAP trust routing daemon.
#              GSS-EAP is an IETF standard for providing authentication
#              across an insecure WAN.
### END INIT INFO

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

# Source networking configuration.
. /etc/sysconfig/network

# Load the instance configuration
[ -f /etc/sysconfig/trust_router ] || exit 6
. /etc/sysconfig/trust_router

# Create the pidfile directory
mkdir -p /var/run/trust_router
chown trustrouter:trustrouter /var/run/trust_router

# Does the trust router and wrapper exist
[ -x /usr/bin/trust_router ] || exit 5
[ -x /usr/bin/trust_router-wrapper ] || exit 5

# Does the tidc client exist
[ -x /usr/bin/tidc ] || exit 5
[ -x /usr/bin/tidc-wrapper ] || exit 5

prog="trust_router-wrapper"

array_contains() {
	local i

	for i in "${@:2}" ;
	do
		[ "${i}" == "${1}" ] && return 0
	done

	return 1
}

execute-tidc() {
	echo -n "Attempting to authenticate to instance ${current_instance}:${current_port}"

	daemon --user="${current_user}" /usr/bin/tidc-wrapper "${current_test_acceptor}" "${current_test_rprealm}" "${current_test_community}" "${current_test_realm}" "${current_port}"
	tidc_ret=$?

	echo

	return ${tidc_ret}
}

get-config() {
	current_instance=${1}

	if [ "${TR_CONFIG_USER[${current_instance}]+abc}" ] ;
	then
		current_user=${TR_CONFIG_USER[${current_instance}]}
	else
		current_user=${TR_DEFAULT_USER}
	fi

	if [ "${TR_CONFIG_PIDDIR[${current_instance}]+abc}" ] ;
	then
		current_piddir=${TR_CONFIG_PIDDIR[${current_instance}]}
	else
		current_piddir=${TR_DEFAULT_PIDDIR}
	fi

	if [ "${TR_CONFIG_CFGDIR[${current_instance}]+abc}" ] ;
	then
		current_cfgdir=${TR_CONFIG_CFGDIR[${current_instance}]}
	else
		current_cfgdir=${TR_DEFAULT_CFGDIR}
	fi

	if [ "${TR_CONFIG_LOGDIR[${current_instance}]+abc}" ] ;
	then
		current_logdir=${TR_CONFIG_LOGDIR[${current_instance}]}
	else
		current_logdir=${TR_DEFAULT_LOGDIR}
	fi

	if [ "${TR_CONFIG_PORT[${current_instance}]+abc}" ] ;
	then
		current_port=${TR_CONFIG_PORT[${current_instance}]}
	else
		current_port=${TR_DEFAULT_PORT}
	fi

	if [ "${TR_CONFIG_AUTOSTART[${current_instance}]+abc}" ] ;
	then
		current_autostart=${TR_CONFIG_AUTOSTART[${current_instance}]}
	else
		current_autostart=${TR_DEFAULT_AUTOSTART}
	fi

	if [ "${TR_CONFIG_ACCEPTOR[${current_instance}]+abc}" ] ;
	then
		current_test_acceptor=${TR_CONFIG_TEST_ACCEPTOR[${current_instance}]}
	else
		current_test_acceptor=${TR_DEFAULT_TEST_ACCEPTOR}
	fi

	if [ "${TR_CONFIG_RPREALM[${current_instance}]+abc}" ] ;
	then
		current_test_rprealm=${TR_CONFIG_TEST_RPREALM[${current_instance}]}
	else
		current_test_rprealm=${TR_DEFAULT_TEST_RPREALM}
	fi

	if [ "${TR_CONFIG_TEST_COMMUNITY[${current_instance}]+abc}" ] ;
	then
		current_test_community=${TR_CONFIG_TEST_COMMUNITY[${current_instance}]}
	else
		current_test_community=${TR_DEFAULT_TEST_COMMUNITY}
	fi

	if [ "${TR_CONFIG_TEST_REALM[${current_instance}]+abc}" ] ;
	then
		current_test_realm=${TR_CONFIG_TEST_REALM[${current_instance}]}
	else
		current_test_realm=${TR_DEFAULT_TEST_REALM}
	fi
}

get-pidfile() {
	echo "${current_piddir}/${current_instance}.pid"
}

start() {
	[ "${EUID}" != "0" ] && exit 4
	[ "${NETWORKING}" = "no" ] && exit 1

	start_ret=0

	for i in "${TR_INSTANCES[@]}"
	do
		get-config "${i}"

		if ${current_autostart} ;
		then
			start-instance
			let "start_ret+=$?"
		else
			echo "Skipping instance ${current_instance}"
		fi
	done

	return "${start_ret}"
}

start-single() {
       	if array_contains "${1}" "${TR_INSTANCES[@]}" ;
       	then
            	get-config "${1}"

		start-instance
		return $?
       	else
               	echo "Instance ${1} not found..."

                return 1
       	fi
}

start-instance() {
	pidfile=$(get-pidfile)
	logfile="${current_logdir}/${current_instance}.log"
	cfgdir="${current_cfgdir}/${current_instance}/"

	OPTIONS="${pidfile} ${cfgdir} ${logfile}"

	if [ -f "${pidfile}" ] ;
	then
		local OLD_PID=$(cat "${pidfile}")

		if [ -d "/proc/${OLD_PID}" ] ;
		then
			echo "Instance ${current_instance} is already running..."
		else
			echo "Removing stale PID file..."
			rm "${pidfile}"

			start-instance
			return $?
		fi
	else
		echo -n "Starting instance ${current_instance}..."
		daemon --user="${current_user}" --pidfile="${pidfile}" "${prog}" "${OPTIONS}"
		echo
	fi

	# Give it a few seconds for things to settle
	sleep 2

	execute-tidc
	return $?
}

stop() {
	[ "${EUID}" != "0" ] && exit 4
        [ "${NETWORKING}" = "no" ] && exit 1

        for i in "${TR_INSTANCES[@]}"
       	do
               	get-config "${i}"

		pidfile=$(get-pidfile)

		if [ -f "${pidfile}" ] ;
		then
			stop-instance
		else
			echo "Instance ${i} does not appear to be running..."
		fi
	done
}

stop-single() {
	if array_contains "${1}" "${TR_INSTANCES[@]}" ;
	then
		get-config "${1}"

		stop-instance
	else
		echo "Instance ${1} not found..."

		return 1
	fi

	return 0
}

stop-instance() {
	if [ -f "$(get-pidfile)" ]  ;
	then
		echo -n "Stopping instance ${current_instance}..."

		killproc -p "$(get-pidfile)" "${prog}"
		echo
	else
		echo "Instance ${current_instance} does not appear to be running..."
	fi
}

status() {
       	[ "${EUID}" != "0" ] && exit 4
       	[ "${NETWORKING}" = "no" ] && exit 1

	start_ret=0

       	for i in "${TR_INSTANCES[@]}"
        do
               	get-config "${i}"

		execute-tidc
                let "exec_ret+=$?"
        done

       	return "${exec_ret}"
}


# See how we were called.
case "${1}" in
  start)
	start
	;;
  start-single)
	start-single "${2}"
	;;
  stop)
	stop
	;;
  stop-single)
	stop-single "${2}"
	;;
  status)
	status "${prog}"
	;;
  restart|force-reload)
	stop
	start
	;;
  reload)
	exit 3
	;;
  *)
	echo "Usage: ${0} {start|start-single|stop|stop-single|status|restart|force-reload}"
	exit 2
esac