#!/bin/bash

. /usr/lib/network/functions

action="${1}"
assert isset action

interface="${2}"
assert isset interface

proto=${3}
assert isset proto

# Check if the given interface is a zone.
assert zone_exists ${interface}

case "${action}" in
	start)
		leases_file=""

		# Create dhclient configuration file.
		case "${proto}" in
			ipv4)
				config_file="${RUN_DIR}/dhclient/${interface}/dhclient4.conf"
				;;
			ipv6)
				config_file="${RUN_DIR}/dhclient/${interface}/dhclient6.conf"
				leases_file="/var/lib/dhclient/dhclient6-${interface}.leases"
				;;
		esac
		assert isset config_file

		# Update the dhclient configuration files
		dhclient_write_config "${interface}" \
			--config-file="${config_file}" \
			--leases-file="${leases_file}" || exit $?

		exit ${EXIT_OK}
		;;

	stop)
		case "${proto}" in
			ipv4)
				reason="STOP"
				;;
			ipv6)
				reason="STOP6"
				;;
		esac
		assert isset reason

		export interface
		export reason

		exec /usr/sbin/dhclient-script

		log ERROR $"execing dhclient-script has failed."
		exit ${EXIT_ERROR}
		;;

	*)
		log ERROR "Unknown action passed: ${action}"
		exit ${EXIT_ERROR}
		;;
esac