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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# update-oui.py -- update netsniff-ng oui.conf from official IEEE OUI list
#
# Copyright (C) 2013 Tobias Klauser <tklauser@distanz.ch>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
import os
import sys
import re
import getopt
try:
from urllib2 import urlopen # Python 2.x
except ImportError:
from urllib.request import urlopen # Python 3.x
DEFAULT_OUPUT_FILE = "oui.conf"
DEFAULT_OUI_URL = "http://standards.ieee.org/develop/regauth/oui/oui.txt"
OUI_PATTERN = re.compile(b"^\s*([a-fA-F0-9]{2})-([a-fA-F0-9]{2})-([a-fA-F0-9]{2})\s+\(hex\)\s+(.*)$")
def usage():
print("""usage: {0} [OPTION...]
available options:
-f force overwrite of existing file
-o set output file (default: {1})
-u set URL to fetch OUI list from (default: {2})
-h show this help and exit""".format(os.path.basename(sys.argv[0]),
DEFAULT_OUPUT_FILE, DEFAULT_OUI_URL))
def main():
try:
opts, args = getopt.getopt(sys.argv[1:], "fo:u:h")
except getopt.GetoptError as err:
print(str(err))
usage()
sys.exit(-1)
overwrite = False
output_file = DEFAULT_OUPUT_FILE
oui_url = DEFAULT_OUI_URL
for o, a in opts:
if o == '-f':
overwrite = True
elif o == '-o':
output_file = a
elif o == '-u':
oui_url = a
elif o == '-h':
usage()
sys.exit(0)
else:
assert False, "unhandled option"
if not overwrite and os.path.exists(output_file):
print("Error: output file {} already exists".format(output_file))
sys.exit(-1)
print("Updating OUI information in {} from {}... ".format(output_file, oui_url))
fh_url = urlopen(oui_url)
ouis = []
for line in fh_url:
m = OUI_PATTERN.match(line)
if m:
oui = "0x{}{}{}".format(m.group(1), m.group(2), m.group(3))
vendor = m.group(4).rstrip()
ouis.append((oui, vendor))
fh_file = open(output_file, 'w')
for oui, vendor in sorted(ouis):
fh_file.write("{}, {}\n".format(oui, vendor))
fh_url.close()
fh_file.close()
print("{} OUIs written to {}".format(len(ouis), output_file))
if __name__ == '__main__':
main()
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