#!/sbin/openrc-run
# Copyright 1999-2019 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

SURICATA_BIN=/usr/bin/suricata
SURICATA_DIR=${SURICATA_DIR:-/etc/suricata}
SURICATA=${SVCNAME#*.}
SURICATAID=$(shell_var "${SURICATA}")
if [ -n "${SURICATA}" ] && [ ${SVCNAME} != "suricata" ]; then
    eval SURICATACONF=\$SURICATA_CONF_${SURICATAID}
    [ ${#SURICATACONF} -eq 0 ] && SURICATACONF="${SURICATA_DIR}/suricata-${SURICATA}.yaml" || SURICATACONF="${SURICATA_DIR}/${SURICATACONF}"
    SURICATAPID="/var/run/suricata/suricata.${SURICATA}.pid"
    eval SURICATAOPTS=\$SURICATA_OPTS_${SURICATAID}
    eval SURICATALOGPATH=\$SURICATA_LOG_FILE_${SURICATAID}
    eval SURICATAUSER=\$SURICATA_USER_${SURICATAID}
    eval SURICATAGROUP=\$SURICATA_GROUP_${SURICATAID}
else
    SURICATACONF=${SURICATA_CONF}
    [ ${#SURICATACONF} -eq 0 ] && SURICATACONF="${SURICATA_DIR}/suricata.yaml" || SURICATACONF="${SURICATA_DIR}/${SURICATACONF}"
    SURICATAPID="/var/run/suricata/suricata.pid"
    SURICATAOPTS=${SURICATA_OPTS}
    SURICATALOGPATH=${SURICATA_LOG_FILE}
    SURICATAUSER=${SURICATA_USER}
    SURICATAGROUP=${SURICATA_GROUP}
fi
SURICATAUSER=${SURICATAUSER:-${SURICATA_USER}}
SURICATAGROUP=${SURICATAGROUP:-${SURICATA_GROUP}}
[ -e ${SURICATACONF} ] && SURICATAOPTS="-c ${SURICATACONF} ${SURICATAOPTS}"
[[ -z "${SURICATA_MAX_WAIT_ON_STOP// }" ]] || SURICATA_RETRY="--retry ${SURICATA_MAX_WAIT_ON_STOP}"

description="Suricata IDS/IPS"
extra_commands="checkconfig dump"
description_checkconfig="Check config for ${SVCNAME}"
description_dump="List all config values that can be used with --set"
extra_started_commands="reload relog"
description_reload="Live rule and config reload"
description_relog="Close and re-open all log files"

depend() {
	need net
	after mysql
	after postgresql
}

checkconfig() {
	if [ ! -d "/var/run/suricata" ] ; then
		checkpath -d /var/run/suricata
	fi
	if [ ${#SURICATALOGPATH} -gt 0 ]; then
		SURICATALOGFILE=$( basename ${SURICATALOGPATH} )
		SURICATALOGFILE=${SURICATALOGFILE:-suricata.log}
		SURICATALOGPATH=$( dirname ${SURICATALOGPATH} )
		if [ ! -d "${SURICATALOGPATH}" ] ; then
			checkpath -d "${SURICATALOGPATH}"
		fi
		if [ ${#SURICATAUSER} -gt 0 ] && [ ${#SURICATAGROUP} -gt 0 ] && [ -e "${SURICATALOGPATH}" ]; then
			chown ${SURICATAUSER}:${SURICATAGROUP} "${SURICATALOGPATH}" || return 1
			chown ${SURICATAUSER}:${SURICATAGROUP} "${SURICATALOGPATH}"/* >/dev/null 2>&1 3>&1
		fi
		SURICATAOPTS="${SURICATAOPTS} --set logging.outputs.1.file.filename=${SURICATALOGPATH}/${SURICATALOGFILE}"
		SURICATALOGPATH="-l ${SURICATALOGPATH}"
	fi
	if [ ! -e ${SURICATACONF} ] ; then
		einfo "The configuration file ${SURICATACONF} was not found."
		einfo "If this is OK then make sure you set enough options for ${SVCNAME} in /etc/conf.d/suricata."
		einfo "Take a look at the suricata arguments --set and --dump-config."
	fi
	if [ ${#SURICATAUSER} -gt 0 ] && [ ${#SURICATAGROUP} -gt 0 ]; then
		einfo "${SVCNAME} will run as user ${SURICATAUSER}:${SURICATAGROUP}."
		SURICATAOPTS="${SURICATAOPTS} --user=${SURICATAUSER} --group=${SURICATAGROUP}"
	fi
}

initpidinfo() {
	[ -e ${SURICATAPID} ] && SUR_PID="$(cat ${SURICATAPID})"
	if [ ${#SUR_PID} -gt 0 ]; then
	    SUR_PID_CHECK="$(ps -eo pid | grep -c ${SUR_PID})"
	    SUR_USER="$(ps -p ${SUR_PID} --no-headers -o user)"
	fi
}

checkpidinfo() {
	initpidinfo
        if [ ! -e ${SURICATAPID} ]; then
        	eerror "${SVCNAME} isn't running"
                return 1
	elif [ ${#SUR_PID} -eq 0 ] || [ $((SUR_PID_CHECK)) -ne 1 ]; then
		eerror "Could not determine PID of ${SVCNAME}! Did the service crash?"
		return 1
	elif [ ${#SUR_USER} -eq 0 ]; then
		eerror "Unable to determine user running ${SVCNAME}!"
		return 1
	elif [ "x${SUR_USER}" != "xroot" ]; then
		ewarn "${SVCNAME} may need to be running as root or as a priviledged user for the extra commands reload and relog to work."
        fi
}

start() {
	checkconfig || return 1
	ebegin "Starting ${SVCNAME}"
	start-stop-daemon --start --quiet --exec ${SURICATA_BIN} \
		-- --pidfile ${SURICATAPID} -D ${SURICATAOPTS} ${SURICATALOGPATH} >/dev/null 2>&1
	local SUR_EXIT=$?
	if [ $((SUR_EXIT)) -ne 0 ]; then
	    einfo "Could not start ${SURICATA_BIN} with:"
	    einfo "--pidfile ${SURICATAPID} -D ${SURICATAOPTS} ${SURICATALOGPATH}"
	    einfo "Exit code ${SUR_EXIT}"
	fi
	eend ${SUR_EXIT}
}

stop() {
	ebegin "Stopping ${SVCNAME}"
	start-stop-daemon --stop ${SURICATA_RETRY} --quiet --pidfile ${SURICATAPID} >/dev/null 2>&1
	eend $?
}

reload() {
	checkpidinfo || return 1
	checkconfig || return 1
	ebegin "Sending USR2 signal to ${SVCNAME} to perform a live rule and config reload."
	if [ ${#SURICATAUSER} -gt 0 ] && [ ${#SURICATAGROUP} -gt 0 ]; then
		start-stop-daemon --user ${SURICATAUSER} --group ${SURICATAGROUP} --signal USR2 --pidfile ${SURICATAPID}
	else
		start-stop-daemon --signal USR2 --pidfile ${SURICATAPID}
	fi
	eend $?
}

relog() {
	checkpidinfo || return 1
	checkconfig || return 1
	ebegin "Sending HUP signal to ${SVCNAME} to close and re-open all log files."
	if [ ${#SURICATAUSER} -gt 0 ] && [ ${#SURICATAGROUP} -gt 0 ]; then
		start-stop-daemon --user ${SURICATAUSER} --group ${SURICATAGROUP} --signal HUP --pidfile ${SURICATAPID}
	else
		start-stop-daemon --signal HUP --pidfile ${SURICATAPID}
	fi
	eend $?
}

dump() {
	checkconfig || return 1
	ebegin "Dumping ${SVCNAME} config values and quitting."
	${SURICATA_BIN} --dump-config --pidfile ${SURICATAPID} ${SURICATAOPTS} ${SURICATALOGPATH}
	eend $?
}