#!/sbin/openrc-run
# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

description="kea dhcp services"
extra_started_commands="reload"

dhcp4_command="/usr/sbin/kea-dhcp4"
dhcp6_command="/usr/sbin/kea-dhcp6"
ddns_command="/usr/sbin/kea-dhcp-ddns"
agent_command="/usr/sbin/kea-ctrl-agent"
dhcp4_config="${DHCP4_CONFIG:-/etc/kea/dhcp4.conf}"
dhcp6_config="${DHCP6_CONFIG:-/etc/kea/dhcp6.conf}"
ddns_config="${DDNS_CONFIG:-/etc/kea/ddns.conf}"
agent_config="${AGENT_CONFIG:-/etc/kea/ctrl-agent.conf}"
dhcp4_pidfile="/run/kea-dhcp4.pid"
dhcp6_pidfile="/run/kea-dhcp6.pid"
ddns_pidfile="/run/kea-ddns.pid"
agent_pidfile="/run/kea-ctrl-agent.pid"

kea_user="${KEA_USER}"

depend() {
	use net
}

reload_kea_service() {
	local service_pidfile

	if [ -z "${1}" ] ; then
		eerror "No service pidfile given for reload."
		return 1
	else
		service_pidfile="${1}"
	fi

	# all kea services reload their configs on SIGHUP (1)
	kill -1 $(cat ${service_pidfile})
}

start_pre() {
	if ${DHCP4:-false} ; then
		if [ ! -f "${dhcp4_config}" ] ; then
			eerror "Please create a ${dhcp4_config} config file."
			return 1
		fi

		if ! ${dhcp4_command} -t ${dhcp4_config} 1>/dev/null 2>/dev/null ; then
			eerror "Error in config file ${dhcp4_config}"
			return 1
		fi
	fi
	if ${DHCP6:-false} ; then
		if [ ! -f "${dhcp6_config}" ] ; then
			eerror "Please create a ${dhcp6_file} config file."
			return 1
		fi

		if ! ${dhcp6_command} -t ${dhcp6_config} 1>/dev/null 2>/dev/null ; then
			eerror "Error in config file ${dhcp6_config}"
			return 1
		fi
	fi
	if ${DDNS:-false} ; then
		if [ ! -f "${ddns_config}" ] ; then
			eerror "Please create a ${ddns_config} config file."
			return 1
		fi

		if ! ${ddns_command} -t ${ddns_config} 1>/dev/null 2>/dev/null ; then
			eerror "Error in config file ${ddns_config}"
			return 1
		fi
	fi
	if ${AGENT:-false} ; then
		if [ ! -f "${agent_config}" ] ; then
			eerror "Please create a ${agent_config} config file."
			return 1
		fi

		if ! ${agent_command} -t ${agent_config} 1>/dev/null 2>/dev/null ; then
			eerror "Error in config file ${agent_config}"
			return 1
		fi
	fi

	# Make sure that kea has all required permissions to run 
	# (un-)privileged.
	local cp_opts="-q -o ${kea_user:-root}"
	checkpath ${cp_opts} -D /run/kea
	checkpath ${cp_opts} -d /var/lib/kea
	checkpath ${cp_opts} -f /var/lib/kea/*.csv*
	checkpath ${cp_opts} -d /var/log/kea
}

start() {
	local retval=0 wait="--wait 1000"
	ebegin "Starting kea dhcp services"
	if ${DHCP4:-false} ; then
		start-stop-daemon -m -b -p ${dhcp4_pidfile} \
			${kea_user:+--user} ${kea_user} ${kea_user:+${wait}} \
			-x ${dhcp4_command} -- -c ${dhcp4_config} \
			|| retval=$(( ${retval} + 1 ))
	fi
	if ${DHCP6:-false} ; then
		start-stop-daemon -m -b -p ${dhcp6_pidfile} \
			${kea_user:+--user} ${kea_user} ${kea_user:+${wait}} \
			-x ${dhcp6_command} -- -c ${dhcp6_config} \
			|| retval=$(( ${retval} + 1 ))
	fi
	if ${DDNS:-false} ; then
		start-stop-daemon -m -b -p ${ddns_pidfile} \
			${kea_user:+--user} ${kea_user} ${kea_user:+${wait}} \
			-x ${ddns_command} -- -c ${ddns_config} \
			|| retval=$(( ${retval} + 1 ))
	fi
	if ${AGENT:-false} ; then
		start-stop-daemon -m -b -p ${agent_pidfile} \
			${kea_user:+--user} ${kea_user} ${kea_user:+${wait}} \
			-x ${agent_command} -- -c ${agent_config} \
			|| retval=$(( ${retval} + 1 ))
	fi
	eend ${retval}
}

reload() {
	ebegin "Reloading kea configs"
	if ${DHCP4:-false} ; then
		reload_kea_service ${dhcp4_pidfile}
	fi
	if ${DHCP6:-false} ; then
		reload_kea_service ${dhcp6_pidfile}
	fi
	if ${DDNS:-false} ; then
		reload_kea_service ${ddns_pidfile}
	fi
	if ${AGENT:-false} ; then
		reload_kea_service ${agent_pidfile}
	fi
	eend
}

stop() {
	local retval=0
	ebegin "Stopping kea dhcp services"
	if ${DHCP4:-false} ; then
		start-stop-daemon --stop -p ${dhcp4_pidfile} \
			|| retval=$(( ${retval} + 1 ))
	fi
	if ${DHCP6:-false} ; then
		start-stop-daemon --stop -p ${dhcp6_pidfile} \
			|| retval=$(( ${retval} + 1 ))
	fi
	if ${DDNS:-false} ; then
		start-stop-daemon --stop -p ${ddns_pidfile} \
			|| retval=$(( ${retval} + 1 ))
	fi
	if ${AGENT:-false} ; then
		start-stop-daemon --stop -p ${agent_pidfile} \
			|| retval=$(( ${retval} + 1 ))
	fi
	eend ${retval}
}