39 lines
1.7 KiB
Python
39 lines
1.7 KiB
Python
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import re
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# This script extracts ip, mac, and hostname from a dhcp server's log file to a csv file.
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# This works only if the log files match the format in the example log file in this directory
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def extract_info_from_logs(log_file_list, output_file_path):
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# Regular expression to match IP address, MAC address, and hostname
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regex = re.compile(
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r'\b(?:DHCPACK|DHCPREQUEST|DHCPOFFER)\b.*?on\s+([\d.]+)\s+to\s+([\da-f:]+)(?:\s+\((.*?)\))?'
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)
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# A list of (ip, mac, host) data extracted from matched lines
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extracted_data = []
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for logfile in log_file_list:
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with open(logfile, 'r') as logfile:
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for line in logfile:
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match = regex.search(line)
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if match:
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ip = match.group(1)
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mac = match.group(2)
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host = match.group(3) if match.group(3) else "Unknown"
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data = ip + "," + mac + "," + host # Customizable as per requirements
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if data not in extracted_data: # Ensure uniqueness
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# Add other conditions here as per requirements
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extracted_data.append(data) # Add extratcted data to the list
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# Write the extracted data to the output file
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with open(output_file_path, 'w') as output_file:
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output_file.write("IP,MAC,HOST\n") # Header row
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output_file.write('\n'.join(extracted_data)) # Data, as row+'\n'
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print(f"Extraction complete. Data written to {output_file_path}.")
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logfilelist = ['/var/log/syslog', '/var/log/syslog.1', '/var/log/dhcp.log'] # Specify the list of /path/log_file
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outputfile = 'output.csv' # Specify the output file /path/name.csv
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extract_info_from_logs(logfilelist, outputfile)
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