`How can I convert a can data blf file to a pcap file?
I need to convert all the packets present in this file to a pcap file. Here is an example of what I have tried, it has no errors but there is no result as well. have tried to open the blf file abd print the data but that has been a fail as well. I know that the blf file has data in it. `
import can
import dpkt
import datetime
blf_file_path = r'c:\Users\sahaanan\Desktop\blftopcap\NewSW_7209_Lines.blf'
pcap_file_path = r'c:\Users\sahaanan\Desktop\blftopcap\output.pcap'
# Open the BLF file for reading
with can.BLFReader(blf_file_path) as log:
# Open the PCAP file for writing
with open(pcap_file_path, "wb") as pcap_file:
pcap_writer = dpkt.pcap.Writer(pcap_file)
for entry in log:
timestamp = entry.timestamp
data = bytes(entry.data)
# Print information about each entry
print(f"Timestamp: {timestamp}, Data Length: {len(data)}")
# Create a PCAP packet with timestamp
pcap_packet = (timestamp, data)
# Write the PCAP packet to the PCAP file
pcap_writer.writepkt(pcap_packet)
print("Conversion complete.")
the code runs without any errors but there is no output i have also tried using error handling with "try" and "exception" but the output is same.
Here's a corrected version of your code:
import can
import dpkt
import datetime
blf_file_path = 'path_to_your_blf_file.blf'
pcap_file_path = 'output.pcap'
with can.BLFReader(blf_file_path) as log:
# Open the PCAP file for writing
with open(pcap_file_path, 'wb') as pcap_file:
pcap_writer = dpkt.pcap.Writer(pcap_file)
for entry in log:
timestamp = entry.timestamp
data = bytes(entry.data)
# Calculate the timestamp in seconds and microseconds
ts_sec = int(timestamp)
ts_usec = int((timestamp - ts_sec) * 1e6)
pcap_packet = (ts_sec, ts_usec, data)
pcap_writer.writepkt(pcap_packet)
print('Conversion complete.')
Make sure you have the necessary packages (can, dpkt) installed and that the paths to your input and output files are correct.