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tooling: claralogConverter changed path and ignore already decoded files

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uhi22 2024-01-20 21:36:38 +01:00
parent c0bc567f01
commit 80aec67c4d
1 changed files with 12 additions and 6 deletions
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18
claralogConverter.py
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@ -27,7 +27,7 @@ from helpers import combineValueAndMultiplier
import json import json
# The path where the script will search for pcap files: # The path where the script will search for pcap files:
directory = 'local/pcaps_to_convert' directory = '../clara-logs'
# stop the evaluation after this number of packets. Set to zero to have no limit. # stop the evaluation after this number of packets. Set to zero to have no limit.
nLimitNumberOfPackets = -1 nLimitNumberOfPackets = -1
@ -42,8 +42,13 @@ nLimitNumberOfPackets = -1
def convertClaralogToTxt(inputFileName): def convertClaralogToTxt(inputFileName):
global nLimitNumberOfPackets global nLimitNumberOfPackets
global directory global directory
outputFileName = inputFileName + '.decoded.txt'
# todo: if output file exists
if (os.path.isfile(os.path.join(directory, outputFileName))):
print("output file " + outputFileName + " already exists. Nothing to do.")
return
fileIn = open(inputFileName, 'r') fileIn = open(inputFileName, 'r')
fileOut = open(inputFileName + '.decoded.txt', 'w') fileOut = open(outputFileName, 'w')
print("# generated by claralogConverter.py", file=fileOut) print("# generated by claralogConverter.py", file=fileOut)
print("# https://github.com/uhi22/pyPLC", file=fileOut) print("# https://github.com/uhi22/pyPLC", file=fileOut)
fileOutValues = open(inputFileName + '.values.txt', 'w') fileOutValues = open(inputFileName + '.values.txt', 'w')
@ -60,12 +65,13 @@ def convertClaralogToTxt(inputFileName):
numberOfPackets+=1 numberOfPackets+=1
#print(packet) #print(packet)
print(line.strip(), file=fileOut) print(line.strip(), file=fileOut)
posTcpPayload = line.find(": 01 fe 80 01 00") lineWithoutBlanks = line.replace(" ", "")
posTcpPayload = lineWithoutBlanks.find(":01fe800100")
if posTcpPayload>0: if posTcpPayload>0:
# we found the V2GTP header. # we found the V2GTP header.
tcppayload = line[posTcpPayload + 2:] # everything until the end of the line is the data tcppayload = lineWithoutBlanks[posTcpPayload + 1:] # everything until the end of the line is the data
# this gives a string of hex values, separated by " ", e.g. "01 fe 80 01" # this gives a string of hex values, separated by " ", e.g. "01fe8001"
s = tcppayload.replace(" ", "") # remove spaces s = tcppayload
if (s[0:8]=="01fe8001"): if (s[0:8]=="01fe8001"):
# it is a V2GTP header with EXI content # it is a V2GTP header with EXI content
strExi = s[16:] # remove V2GTP header (8 bytes, means 16 hex characters) strExi = s[16:] # remove V2GTP header (8 bytes, means 16 hex characters)