#!/bin/sh

die(){
	echo "$1" >&2
	exit 1
}

usage(){
	die "Usage: $(basename "$0") add-alias\n\
       $(basename "$0") tmp-alias IFACE\n\
       $(basename "$0") set-defaults CAPNAME\n\
       $(basename "$0") ntpdate\n\
       $(basename "$0") remove-alias IFACE"
}

# main

test_vars(){
	for v in $REQUIRED_VARS ; do
		V="\$$v"
		if [ -z "$(eval echo $V)" ] ; then
			die "Invalid value for variable $V"
		fi
	done
	return 0
}
[ "$1" ] || usage
OPTION="$1"
shift
case "$OPTION" in
	add-alias)
		REQUIRED_VARS="CAP_NET_HOST_IFACE CAP_NET_HOST_ALIAS CAP_NET_HOST_IP CAP_NET_HOST_MASK"
		eval "$(llxcfg-showvars "$REQUIRED_VARS")"
		test_vars
		ifconfig "${CAP_NET_HOST_IFACE}:${CAP_NET_HOST_ALIAS}" $CAP_NET_HOST_IP netmask $CAP_NET_HOST_MASK
		;;
	remove-alias)
		CAP_NET_HOST_IFACE="$1"
		[ "$CAP_NET_HOST_IFACE" ] || usage
		REQUIRED_VARS="CAP_NET_ALIAS CAP_NET_ADDRESS CAP_NET_MASK"
		eval "$(llxcfg-showvars "$REQUIRED_VARS")"
		test_vars
		ifconfig "${CAP_NET_HOST_IFACE}:${CAP_NET_ALIAS}" down
		;;
	tmp-alias)
		CAP_NET_HOST_IFACE="$1"
		[ "$CAP_NET_HOST_IFACE" ] || usage
		REQUIRED_VARS="CAP_NET_ALIAS CAP_NET_ADDRESS CAP_NET_MASK"
		eval "$(llxcfg-showvars "$REQUIRED_VARS")"
		test_vars
		RANDOM=$$
		CAP_BYTE=$((230 + $RANDOM%21))
		CAP_NET_HOST_IP="${CAP_NET_ADDRESS%.*}.${CAP_BYTE}"
		ifconfig "${CAP_NET_HOST_IFACE}:${CAP_NET_ALIAS}" $CAP_NET_HOST_IP netmask $CAP_NET_MASK
		;;
	set-defaults)
		# set CAP_FQDN & CAP_HOST_ID from SRV_DOMAIN.CAP_NET_DOMAIN & SRV_HOST_ID
		#     CAP_PRINCIPAL from CODIGO_CENTRO
                # using lliurex-cap set-default
		CAPNAME="$1"
		REQUIRED_VARS="CAP_NET_DOMAIN SRV_HOST_ID"
		eval "$(llxcfg-showvars "$REQUIRED_VARS")"
		[ "$1" ] || die "CAPNAME isn't defined"
		test_vars
		lliurex-cap set-default CAP_FQDN="node-${SRV_HOST_ID}.${CAPNAME}.${CAP_NET_DOMAIN}" CAP_HOST_ID="$SRV_HOST_ID"
		;;
	ntpdate)
		REQUIRED_VARS="CAP_NET_ADDRESS CAP_NET_MASK CAP_NET_CAPNAME CAP_NTP_ENABLE"
		eval "$(llxcfg-showvars "$REQUIRED_VARS CAP_ZERO_CAPNAME")"
		[ "$CAP_NET_CAPNAME" ] || CAP_NET_CAPNAME="$CAP_ZERO_CAPNAME"
		test_vars
		export $REQUIRED_VARS
		rc=0
		lliurex-cap exec "$CAP_NET_CAPNAME" /usr/share/llxcfg-cap/llxcfg-ntpdate || rc=$?
		exit $rc
		;;
	*)
		usage
		;;
esac
exit 0