#!/bin/sh /etc/rc.common
# Copyright (C) 2006 OpenWrt.org

START=60

start() {
	[ ! -f /var/run/chronyd.pid ] && (
		/usr/sbin/chronyd -f /etc/chrony/chrony.conf

		local NTP_SERVERS
		local NTP_SERVER
		local CLIENT_NETWORKS
		local NETNAME
		config_load ntpd
		config_get NTP_SERVERS cfg1 TimeServers
		config_get CLIENT_NETWORKS cfg1 ClientAccessFrom
		CHRONY_KEY=$(awk '/^1 / { print $2; }' /etc/chrony/chrony.keys)
		include /lib/network
		scan_interfaces

		# Define servers and do a rapid series of time measurements
		# to get up to date
		(
			echo password $CHRONY_KEY
			for NTP_SERVER in $NTP_SERVERS; do
				echo add server $NTP_SERVER
			done
			echo burst 5/5
		) | chronyc > /dev/null 2>&1
		# ... wait until a reference ID is found ...
		while chronyc tracking | grep 'Reference ID.*0.0.0.0' >/dev/null ; do sleep 1; done
		# ... and finally, adjust the time in a single step
		# and allow clients to access the server
		(
			echo password $CHRONY_KEY
			echo makestep
			for NETNAME in $CLIENT_NETWORKS; do
				local INTERFACE
				local IP
				local NETMASK
				local BROADCAST
				local NETWORK
				local PREFIX

				config_get INTERFACE "$NETNAME" ifname
				if [ -n "$INTERFACE" ] ; then
					eval $(ifconfig $INTERFACE | grep inet | sed -e 's/.*addr:/IP=/' -e 's/ .*Mask:/; NETMASK=/')
					eval $(ipcalc $IP $NETMASK)
					echo allow $NETWORK/$PREFIX
				fi
			done
		) | chronyc > /dev/null 2>&1
	)
}

stop() {
	[ -r /var/run/chronyd.pid ] && PID=$(cat /var/run/chronyd.pid)
	[ -n "$PID" ] && kill $PID
}

restart() {
	stop
	while [ -r /var/run/chronyd.pid ] ; do sleep 1; done
	start
}