forked from osmocom/wireshark
89 lines
2.8 KiB
Python
Executable File
89 lines
2.8 KiB
Python
Executable File
#!/usr/bin/env python3
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# create the enterprises.tsv file from
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# https://www.iana.org/assignments/enterprise-numbers/enterprise-numbers
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# or an offline copy
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#
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# Copyright 2022 by Moshe Kaplan
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# Based on make-sminmpec.pl by Gerald Combs
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#
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# Wireshark - Network traffic analyzer
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# By Gerald Combs <gerald@wireshark.org>
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# Copyright 2004 Gerald Combs
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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import argparse
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import re
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import urllib.request
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ENTERPRISE_NUMBERS_URL = "https://www.iana.org/assignments/enterprise-numbers/enterprise-numbers"
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ENTERPRISES_HEADER = """\
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#
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# generated from https://www.iana.org/assignments/enterprise-numbers/enterprise-numbers
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# run "tools/make-sminmpec.py [infile] outfile" to regenerate
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#
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# The format used here is: <NUMERICAL_ID><SPACE><NAME>
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# Where SPACE can be any sequence of spaces and tabs.
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#
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"""
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DECIMAL_PATTERN = r"^(\d+)"
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# up to three spaces because of formatting errors in the source
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ORGANIZATION_PATTERN = r"^ ?(\S.*)"
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FORMERLY_PATTERN = r" \((formerly .*)\)"
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def generate_enterprise_files(file_content):
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# We only care about the "Decimal" and "Organization",
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# not the contact or email
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org_lines = []
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last_updated = ""
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end_seen = False
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for line in file_content.splitlines():
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decimal_match = re.match(DECIMAL_PATTERN, line)
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if decimal_match:
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decimal = decimal_match.group(0)
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elif re.match(ORGANIZATION_PATTERN, line):
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organization = line.strip()
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if organization.lower() == "unassigned":
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continue
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organization = re.sub(FORMERLY_PATTERN, r"\t# \1", organization)
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org_lines += [decimal + "\t" + organization]
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elif "last updated" in line.lower():
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last_updated = line
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elif "end of document" in line.lower():
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end_seen = True
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if not end_seen:
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raise Exception('"End of Document" not found. Truncated source file?')
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last_updated_line = "# " + last_updated + "\n\n"
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output = ENTERPRISES_HEADER + last_updated_line + "\n".join(org_lines) + "\n"
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return output
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def main():
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parser = argparse.ArgumentParser(description="Create the enterprises.tsv file.")
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parser.add_argument('infile', nargs='?')
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parser.add_argument('outfile', nargs=1)
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parsed_args = parser.parse_args()
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if parsed_args.infile:
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with open(parsed_args.infile, encoding='utf-8') as fh:
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data = fh.read()
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else:
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with urllib.request.urlopen(ENTERPRISE_NUMBERS_URL) as f:
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if f.status != 200:
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raise Exception("request for " + ENTERPRISE_NUMBERS_URL + " failed with result code " + f.status)
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data = f.read().decode('utf-8')
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enterprises_content = generate_enterprise_files(data)
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with open(parsed_args.outfile[0], encoding='utf-8', mode='w') as fh:
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fh.write(enterprises_content)
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if __name__ == "__main__":
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main()
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