def GMLAN_TransferData(sock,
addr,
payload,
maxmsglen=None,
timeout=None,
verbose=None,
retry=0): # noqa: E501
# type: (ISOTPSocket, int, bytes, Optional[int], Optional[int], Optional[bool], int) -> bool # noqa: E501
""" Send TransferData message.
Usually used after calling RequestDownload.
:param sock: socket to send the message on.
:param addr: destination memory address on the ECU.
:param payload: data to be sent.
:param maxmsglen: maximum length of a single iso-tp message.
default: maximum length
:param timeout: timeout for sending, receiving or sniffing packages.
:param verbose: set verbosity level.
:param retry: number of retries in case of failure.
:return: True on success.
"""
if verbose is None:
verbose = conf.verb > 0
retry = abs(retry)
startretry = retry
scheme = conf.contribs['GMLAN']['GMLAN_ECU_AddressingScheme']
if addr < 0 or addr >= 2**(8 * scheme):
warning("Error: Invalid address %s for scheme %s", hex(addr),
str(scheme))
return False
# max size of dataRecord according to gmlan protocol
if maxmsglen is None or maxmsglen <= 0 or maxmsglen > (4093 - scheme):
maxmsglen = (4093 - scheme)
maxmsglen = cast(int, maxmsglen)
for i in range(0, len(payload), maxmsglen):
retry = startretry
while True:
if len(payload[i:]) > maxmsglen:
transdata = payload[i:i + maxmsglen]
else:
transdata = payload[i:]
pkt = GMLAN() / GMLAN_TD(startingAddress=addr + i,
dataRecord=transdata)
resp = sock.sr1(pkt, timeout=timeout, verbose=0)
if _check_response(resp, verbose):
break
retry -= 1
if retry >= 0:
if verbose:
print("Retrying..")
else:
return False
return True
def _get_initial_requests(self, **kwargs):
# type: (Any) -> Iterable[Packet]
scan_range = kwargs.pop("scan_range", range(0x1ff))
temp = conf.contribs["GMLAN"]['GMLAN_ECU_AddressingScheme']
# Shift operations to eliminate addresses not aligned to 4
max_addr = (2**(temp * 8) - 1) >> 2
addresses = (random.randint(0, max_addr) << 2 for _ in scan_range)
return (GMLAN() / GMLAN_TD(subfunction=0, startingAddress=x)
for x in addresses)