def __security_seed_wrapper(args):
"""Wrapper used to initiate security seed dump"""
arb_id_request = args.src
arb_id_response = args.dst
reset_type = args.reset
session_type = args.sess_type
level = args.sec_level
num_seeds = args.num
reset_delay = args.delay
seed_list = []
try:
print("Security seed dump started. Press Ctrl+C to stop.\n")
while num_seeds > len(seed_list) or num_seeds == 0:
# Extended diagnostics
response = extended_session(arb_id_request, arb_id_response,
session_type)
if not Iso14229_1.is_positive_response(response):
print("Unable to enter extended session. Retrying...\n")
continue
# Request seed
response = request_seed(arb_id_request, arb_id_response, level,
None, None)
if response is None:
print("\nInvalid response")
elif Iso14229_1.is_positive_response(response):
seed_list.append(list_to_hex_str(response[2:]))
print("Seed received: {}\t(Total captured: {})".format(
list_to_hex_str(response[2:]), len(seed_list)),
end="\r")
stdout.flush()
else:
print_negative_response(response)
break
if reset_type:
ecu_reset(arb_id_request, arb_id_response, reset_type, None)
time.sleep(reset_delay)
except KeyboardInterrupt:
print("Interrupted by user.")
except ValueError as e:
print(e)
return
if len(seed_list) > 0:
print("\n")
print("Security Access Seeds captured:")
for seed in seed_list:
print(seed)
def __ecu_reset_wrapper(args):
"""Wrapper used to initiate ECU Reset"""
arb_id_request = args.src
arb_id_response = args.dst
reset_type = args.reset_type
timeout = args.timeout
print(
"Sending ECU reset, type 0x{0:02x} to arbitration ID {1} (0x{1:02x})".
format(reset_type, arb_id_request))
try:
response = ecu_reset(arb_id_request, arb_id_response, reset_type,
timeout)
except ValueError as e:
print("ValueError: {0}".format(e))
return
# Decode response
if response is None:
print("No response was received")
else:
response_length = len(response)
if response_length == 0:
# Empty response
print("Received empty response")
elif response_length == 1:
# Invalid response length
print(
"Received response [{0:02x}] (1 byte), expected at least 2 bytes"
.format(response[0], len(response)))
elif Iso14229_1.is_positive_response(response):
# Positive response handling
response_service_id = response[0]
subfunction = response[1]
expected_response_id = Iso14229_1.get_service_response_id(
Services.EcuReset.service_id)
if response_service_id == expected_response_id and subfunction == reset_type:
# Positive response
print("Received positive response")
if response_length > 2:
# Additional data can be seconds left to reset (powerDownTime) or manufacturer specific
additional_data = list_to_hex_str(response[2:], ",")
print("Response contains additional data: [{0}]".format(
additional_data))
else:
# Service and/or subfunction mismatch
print(
"Response service ID 0x{0:02x} and subfunction 0x{1:02x} do not match expected values "
"0x{2:02x} and 0x{3:02x}".format(response_service_id,
subfunction,
expected_response_id,
reset_type))
else:
# Negative response handling
nrc = response[1]
nrc_description = NRC_NAMES.get(nrc, "Unknown NRC value")
print(
"Received negative response code (NRC) 0x{0:02x}: {1}".format(
nrc, nrc_description))