csu3_am335x/EVSE/GPL/mosquitto-2.0.13/test/lib/11-prop-oversize-packet.py

#!/usr/bin/env python3

# Test whether a client publishing an oversize packet correctly.
# The client should try to publish a message that is too big, then the one below which is ok.
# It should also try to subscribe with a too large topic

from mosq_test_helper import *

port = mosq_test.get_lib_port()

rc = 1
keepalive = 60
connect_packet = mosq_test.gen_connect("publish-qos0-test", keepalive=keepalive, proto_ver=5)
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)

bad_publish_packet = mosq_test.gen_publish("pub/test", qos=0, payload="0123456789012345678", proto_ver=5)
publish_packet = mosq_test.gen_publish("pub/test", qos=0, payload="012345678901234567", proto_ver=5)

disconnect_packet = mosq_test.gen_disconnect()


sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.settimeout(10)
sock.bind(('', port))
sock.listen(5)

client_args = sys.argv[1:]
env = dict(os.environ)
env['LD_LIBRARY_PATH'] = '../../lib:../../lib/cpp'
try:
    pp = env['PYTHONPATH']
except KeyError:
    pp = ''
env['PYTHONPATH'] = '../../lib/python:'+pp
client = mosq_test.start_client(filename=sys.argv[1].replace('/', '-'), cmd=client_args, env=env, port=port)

try:
    (conn, address) = sock.accept()
    conn.settimeout(10)

    mosq_test.do_receive_send(conn, connect_packet, connack_packet, "connect")

    mosq_test.expect_packet(conn, "publish", publish_packet)
    mosq_test.expect_packet(conn, "disconnect", disconnect_packet)
    rc = 0

    conn.close()
except mosq_test.TestError:
    pass
finally:
    client.terminate()
    client.wait()
    if rc:
        (stdo, stde) = client.communicate()
        print(stde)
    sock.close()

exit(rc)