#!/usr/bin/env python3
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# Test whether "topic alias" works to the broker
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# MQTT v5
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from mosq_test_helper import *
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rc = 1
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keepalive = 60
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connect_packet = mosq_test.gen_connect("sub-test", keepalive=keepalive, proto_ver=5)
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connack_packet = mosq_test.gen_connack(rc=0, proto_ver=5)
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props = mqtt5_props.gen_uint16_prop(mqtt5_props.PROP_TOPIC_ALIAS, 3)
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publish1_packet = mosq_test.gen_publish("", qos=0, payload="message", proto_ver=5, properties=props)
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disconnect_packet = mosq_test.gen_disconnect(reason_code=148, proto_ver=5)
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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, connack_packet, timeout=5, port=port)
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sock.send(publish1_packet)
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if mosq_test.expect_packet(sock, "disconnect", disconnect_packet):
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rc = 0
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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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