#!/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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connect1_packet = mosq_test.gen_connect("sub-test", keepalive=keepalive, proto_ver=5)
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connack1_packet = mosq_test.gen_connack(rc=0, proto_ver=5)
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connect2_packet = mosq_test.gen_connect("pub-test", keepalive=keepalive, proto_ver=5)
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connack2_packet = mosq_test.gen_connack(rc=0, proto_ver=5)
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mid = 1
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subscribe_packet = mosq_test.gen_subscribe(mid, "subpub/alias", 0, proto_ver=5)
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suback_packet = mosq_test.gen_suback(mid, 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("subpub/alias", qos=0, payload="message", proto_ver=5, properties=props)
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props = mqtt5_props.gen_uint16_prop(mqtt5_props.PROP_TOPIC_ALIAS, 3)
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publish2s_packet = mosq_test.gen_publish("", qos=0, payload="message", proto_ver=5, properties=props)
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publish2r_packet = mosq_test.gen_publish("subpub/alias", qos=0, payload="message", 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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sock1 = mosq_test.do_client_connect(connect1_packet, connack1_packet, timeout=5, port=port)
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sock2 = mosq_test.do_client_connect(connect2_packet, connack2_packet, timeout=5, port=port)
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sock1.send(publish1_packet)
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mosq_test.do_send_receive(sock2, subscribe_packet, suback_packet, "suback")
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sock1.send(publish2s_packet)
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if mosq_test.expect_packet(sock2, "publish2r", publish2r_packet):
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rc = 0
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sock1.close()
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sock2.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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