mosquitto/test/broker/12-prop-maximum-packet-size-broker.py

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#!/usr/bin/env python
# Check whether the broker disconnects a client nicely when they send a too large packet.
from mosq_test_helper import *
def write_config(filename, port):
with open(filename, 'w') as f:
f.write("port %d\n" % (port))
f.write("max_packet_size 30\n")
port = mosq_test.get_port()
conf_file = os.path.basename(__file__).replace('.py', '.conf')
write_config(conf_file, port)
rc = 1
keepalive = 10
connect_packet = mosq_test.gen_connect("test", proto_ver=5, keepalive=keepalive)
props = mqtt5_props.gen_uint32_prop(mqtt5_props.PROP_MAXIMUM_PACKET_SIZE, 30)
connack_packet = mosq_test.gen_connack(rc=0, proto_ver=5, properties=props)
publish_packet = mosq_test.gen_publish("test/topic", qos=0, payload="0123456789012345678901234567890", proto_ver=5)
disconnect_packet = mosq_test.gen_disconnect(reason_code=149, proto_ver=5)
broker = mosq_test.start_broker(filename=os.path.basename(__file__), port=port, use_conf=True)
try:
sock = mosq_test.do_client_connect(connect_packet, connack_packet, port=port)
mosq_test.do_send_receive(sock, publish_packet, disconnect_packet, "disconnect")
rc = 0
finally:
broker.terminate()
broker.wait()
os.remove(conf_file)
(stdo, stde) = broker.communicate()
if rc:
print(stde)
exit(rc)