#!/usr/bin/env python3
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# Test whether the broker reduces the message expiry interval when republishing a will.
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# MQTT v5
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# Client connects with clean session set false, subscribes with qos=1, then disconnects
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# Helper publishes two messages, one with a short expiry and one with a long expiry
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# We wait until the short expiry will have expired but the long one not.
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# Client reconnects, expects delivery of the long expiry message with a reduced
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# expiry interval property.
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from mosq_test_helper import *
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rc = 1
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mid = 53
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keepalive = 60
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props = mqtt5_props.gen_uint32_prop(mqtt5_props.PROP_SESSION_EXPIRY_INTERVAL, 60)
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connect_packet = mosq_test.gen_connect("subpub-qos0-test", keepalive=keepalive, proto_ver=5, clean_session=False, properties=props)
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connack1_packet = mosq_test.gen_connack(rc=0, proto_ver=5)
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connack2_packet = mosq_test.gen_connack(rc=0, proto_ver=5, flags=1)
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subscribe_packet = mosq_test.gen_subscribe(mid, "subpub/qos1", 1, proto_ver=5)
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suback_packet = mosq_test.gen_suback(mid, 1, proto_ver=5)
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props = mqtt5_props.gen_uint32_prop(mqtt5_props.PROP_MESSAGE_EXPIRY_INTERVAL, 10)
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helper_connect = mosq_test.gen_connect("helper", proto_ver=5, will_topic="subpub/qos1", will_qos=1, will_payload=b"message", will_properties=props, keepalive=2)
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helper_connack = mosq_test.gen_connack(rc=0, proto_ver=5)
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#mid=2
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props = mqtt5_props.gen_uint32_prop(mqtt5_props.PROP_MESSAGE_EXPIRY_INTERVAL, 10)
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publish2s_packet = mosq_test.gen_publish("subpub/qos1", mid=mid, qos=1, payload="message2", proto_ver=5, properties=props)
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puback2s_packet = mosq_test.gen_puback(mid)
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port = mosq_test.get_port()
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broker = mosq_test.start_broker(filename=os.path.basename(__file__), port=port)
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try:
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sock = mosq_test.do_client_connect(connect_packet, connack1_packet, timeout=20, port=port)
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mosq_test.do_send_receive(sock, subscribe_packet, suback_packet, "suback")
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sock.close()
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helper = mosq_test.do_client_connect(helper_connect, helper_connack, timeout=20, port=port)
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time.sleep(2)
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sock = mosq_test.do_client_connect(connect_packet, connack2_packet, timeout=20, port=port)
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packet = sock.recv(len(publish2s_packet))
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for i in range(10, 5, -1):
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props = mqtt5_props.gen_uint32_prop(mqtt5_props.PROP_MESSAGE_EXPIRY_INTERVAL, i)
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publish2r_packet = mosq_test.gen_publish("subpub/qos1", mid=1, qos=1, payload="message", proto_ver=5, properties=props)
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if packet == publish2r_packet:
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rc = 0
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break
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sock.close()
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finally:
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broker.terminate()
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broker.wait()
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(stdo, stde) = broker.communicate()
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if rc:
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print(stde.decode('utf-8'))
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exit(rc)
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