From Application to driver:
---------------------------
type: zcl_read_attributes
packet_id: <number_to_id_packet>
device_address_long: <zigbee_long_address>
device_endpoint: <device_endpoint>
cluster_id: <cluster_number>
profile_id: <profile_number>
attribute_ids: <attr_1>[, <attr2> ......]

From Driver to Application:
---------------------------

type: zcl_read_attributes_response
packet_id: <number_to_id_packet>
device_address_long: <zigbee_long_address>
cluster_id: <cluster_number>
profile_id: <profile_number>
attribute_ids: <attr1 stuff, attr1 stuff> ; <attr2> ......]