Here is a list of all documented functions, variables, defines, enums, and typedefs with links to the documentation:

ACKNOWLEDGEMENT_MESSAGE_BUFFER_LENGTH : iot_demo_mqtt.c
ACKNOWLEDGEMENT_MESSAGE_FORMAT : iot_demo_mqtt.c
ACKNOWLEDGEMENT_TOPIC_NAME : iot_demo_mqtt.c
ACKNOWLEDGEMENT_TOPIC_NAME_LENGTH : iot_demo_mqtt.c
AWS_IOT_METRICS_USERNAME : iot_mqtt_helper.c
AWS_IOT_METRICS_USERNAME_LENGTH : iot_mqtt_helper.c
AWS_IOT_MQTT_SERVER : iot_tests_mqtt_subscription.c , iot_tests_mqtt_api.c , iot_tests_mqtt_platform.c , iot_tests_mqtt_receive.c , iot_tests_mqtt_system.c , iot_tests_mqtt_validate.c
AWS_IOT_MQTT_SERVER_MAX_CLIENTID_LENGTH : iot_mqtt_internal.h
AWS_IOT_MQTT_SERVER_MAX_PUBLISH_PAYLOAD_LENGTH : iot_mqtt_internal.h
AWS_IOT_MQTT_SERVER_MAX_TOPIC_FILTERS_PER_SUBSCRIBE : iot_mqtt_internal.h
AWS_IOT_MQTT_SERVER_MAX_TOPIC_LENGTH : iot_mqtt_internal.h