def translate(self, message):
hexMessageIN = []
isRequest = []
# turn into bitstrings
for i in message:
value = BitArray(hex=i[0].replace(" ", ""))
hexMessageIN.append(value)
isRequest.append(i[1])
# detect multiple messages
hexMessages = []
temp = []
for i in hexMessageIN:
print(i[0:16].hex)
if i[0:16].hex == BitArray("0x0564").hex:
if len(temp) > 0:
hexMessages.append(list(temp))
temp = []
temp.append(i)
if len(temp) > 0:
hexMessages.append(list(temp))
allMessages = Report("All Messages", "The entirity of the message", "", "")
messageCount = -1
for hexMessage in hexMessages:
messageCount += 1
hexString = ""
for msg in hexMessage:
hexString += msg.hex + ", "
thisMessage = Report("Message {}".format(messageCount), "", "", hexString)
# verify correctness
try:
if not DataLinkTranslator.DataLayerCorrect(hexMessage[0]):
thisMessage.AddNext(
Report("ERROR", "This message is not verifyably DNP3, or may be malformed", message[0]), ""
)
return Report("Invalid Message", "", "", "")
except:
return Report("Invalid Input", "", "", "")
# remove CRC bits for everything (Andy took 'em out)
# for i in hexMessage:
# i = DataLinkTranslator.StripCRCBits(i)
# Get message length
thisMessage.length = DataLinkTranslator.DataLayerLength(hexMessage[0][:])
thisMessage.MessageLength = thisMessage.length.uint
thisMessage.AddNext(
Report(
"Message length",
"Number of octets this message contains that are not CRC related",
str(thisMessage.length.uint),
"",
)
)
# Get Control Field
control = DataLinkTranslator.DataLayerControl(hexMessage[0][:])
thisMessage.AddNext(
Report("Message Control Data", "Function operations and qualifiers", str(control.hex), "")
)
thisMessage.Next[-1].AddNext(DataLinkTranslator.DataLayerControlReport(control))
# message sender
thisMessage.sender = DataLinkTranslator.DataLayerSource(hexMessage[0][:])
thisMessage.AddNext(Report("Message Sender", "ID for sender", str(thisMessage.sender.hex), ""))
# message reciever
thisMessage.reciever = DataLinkTranslator.DataLayerDestination(hexMessage[0][:])
thisMessage.AddNext(Report("Message Reciever", "ID for Reciever", str(thisMessage.reciever.hex), ""))
# message transport layer
thisMessage.transport = ""
if hexMessage[1][0]:
thisMessage.transport += " FINAL "
if hexMessage[1][1]:
thisMessage.transport += " FIRST "
thisMessage.AddNext(
Report(
"Transport Function",
"Links together large messages in sequence",
(thisMessage.transport + "Seq {}").format(hexMessage[1][2:8].uint),
"",
)
)
hexMessage[1] = hexMessage[1][8:]
# technically a block, so sue me
fragment = 1
baseLayer = thisMessage
while fragment < len(hexMessage):
bucket = []
# requests contain no actual data
# just outlines for what is expected in responses
if isRequest[index]:
bucket.append(Report("Object Header", "Prefix information on Application layer", "", ""))
flags = getAppRequestHeader(hexMessage[fragment])
for i in flags:
bucket[-1].Next.append(i)
bucket.append(translateFuncCode(getFuncCode(hexMessage[fragment])))
# skip internal indications, does not exist in requests
# responses...well...
else:
bucket.append(Report("Object Header", "Prefix information on Application layer", "", ""))
flags = getAppRequestHeader(hexMessage[fragment])
for i in flags:
bucket[-1].Next.append(i)
bucket.append(translateFuncCode(getFuncCode(hexMessage[fragment])))
for i in bucket:
temp = i
if not isinstance(i, Report):
temp = Report(i, "", "", "")
baseLayer.Next[-1].AddNext(temp)
baseLayer.AddNext(Report("Application Fragment {}".format(fragment - 1), "", "", ""))
fragment += 1
allMessages.AddNext(thisMessage)
print(allMessages)
return allMessages
