def send_message(adu, serial_port):
""" Send ADU over serial to to server and return parsed response.
:param adu: Request ADU.
:param sock: Serial port instance.
:return: Parsed response from server.
"""
serial_port.write(adu)
serial_port.flush()
# Check exception ADU (which is shorter than all other responses) first.
exception_adu_size = 19
response_error_adu = recv_exactly(serial_port.read, exception_adu_size)
aes = AES.new(key, AES.MODE_CBC, IV)
response_error_pdu = aes.decrypt(response_error_adu[1:-2])
aes = AES.new(key, AES.MODE_CBC, IV)
req_pdu = aes.decrypt(adu[1:-2])
raise_for_exception_adu(response_error_pdu)
expected_response_size = expected_response_pdu_size_from_request_pdu(
req_pdu) + 3
response_remainder = recv_exactly(
serial_port.read, expected_response_size - exception_adu_size)
return parse_response_adu(response_error_adu + response_remainder, adu)
def send_message(adu, sock):
""" Send ADU over socket to to server and return parsed response.
:param adu: Request ADU.
:param sock: Socket instance.
:return: Parsed response from server.
"""
sock.sendall(adu)
# Check exception ADU (which is shorter than all other responses) first.
exception_adu_size = 9
response_error_adu = recv_exactly(sock.recv, exception_adu_size)
raise_for_exception_adu(response_error_adu)
expected_response_size = \
expected_response_pdu_size_from_request_pdu(adu[7:]) + 7
response_remainder = recv_exactly(
sock.recv, expected_response_size - exception_adu_size)
return parse_response_adu(response_error_adu + response_remainder, adu)
def send_message(adu, serial_port, flush_on_write=False):
""" Send ADU over serial to to server and return parsed response.
:param adu: Request ADU.
:param sock: Serial port instance.
:return: Parsed response from server.
"""
serial_port.write(adu)
time.sleep(0.05) #Delay for slow devices
if flush_on_write:
serial_port.flush()
# Check exception ADU (which is shorter than all other responses) first.
exception_adu_size = 5
response_error_adu = recv_exactly(serial_port.read, exception_adu_size)
raise_for_exception_adu(response_error_adu)
expected_response_size = \
expected_response_pdu_size_from_request_pdu(adu[1:-2]) + 3
response_remainder = recv_exactly(
serial_port.read, expected_response_size - exception_adu_size)
return parse_response_adu(response_error_adu + response_remainder, adu)
