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#!/usr/bin/env python3
#
# Wireshark - Network traffic analyzer
# By Gerald Combs <gerald@wireshark.org>
# Copyright 1998 Gerald Combs
#
# SPDX-License-Identifier: GPL-2.0-or-later
'''Update the "packet-isobus-parameters.h" file.
Make-isobus creates a file containing isobus parameters
from the databases at isobus.net.
'''
import csv
import io
import os
import sys
import urllib.request, urllib.error, urllib.parse
import zipfile
def exit_msg(msg=None, status=1):
if msg is not None:
sys.stderr.write(msg + '\n\n')
sys.stderr.write(__doc__ + '\n')
sys.exit(status)
def open_url_zipped(url):
'''Open a URL of a zipped file.
'''
url_path = '/'.join(url)
req_headers = { 'User-Agent': 'Wireshark make-isobus' }
try:
req = urllib.request.Request(url_path, headers=req_headers)
response = urllib.request.urlopen(req)
body = response.read()
except Exception:
exit_msg('Error opening ' + url_path)
return zipfile.ZipFile(io.BytesIO(body))
def main():
isobus_output_path = os.path.join('epan', 'dissectors', 'packet-isobus-parameters.h')
isobus_zip_url = [ "https://www.isobus.net/isobus/attachments/", "isoExport_csv.zip"]
isobus_files = {
'indust' : 'Industry Groups.csv',
'glblfcts' : 'Global NAME Functions.csv',
'igfcts' :'IG Specific NAME Function.csv',
'manuf' : 'Manufacturer IDs.csv',
'pgn_spns' : 'SPNs and PGNs.csv'
}
zipf = open_url_zipped(isobus_zip_url)
# Industries csv
min_total = 4 # typically 8
f = zipf.read(isobus_files['indust'])
lines = f.decode('UTF-8', 'replace').splitlines()
if len(lines) < min_total:
exit_msg("{}: Not enough entries ({})".format(isobus_files['indust'], len(lines)))
indust_csv = csv.reader(lines)
next(indust_csv)
# Global Name Functions csv
min_total = 50 # XXX as of 2023-10-18
f = zipf.read(isobus_files['glblfcts'])
lines = f.decode('UTF-8', 'replace').splitlines()
if len(lines) < min_total:
exit_msg("{}: Not enough entries ({})".format(isobus_files['glblfcts'], len(lines)))
glbl_name_functions_csv = csv.reader(lines)
next(glbl_name_functions_csv)
# Specific Name Functions csv
min_total = 200 # 295 as of 2023-10-18
f = zipf.read(isobus_files['igfcts'])
lines = f.decode('UTF-8', 'replace').splitlines()
if len(lines) < min_total:
exit_msg("{}: Not enough entries ({})".format(isobus_files['igfcts'], len(lines)))
vehicle_system_names = {}
specific_functions = {}
specific_functions_csv = csv.reader(lines)
next(specific_functions_csv)
for row in specific_functions_csv:
ig_id, vs_id, vs_name, f_id, f_name = row[:5]
new_id = int(ig_id) * 256 + int(vs_id)
if len(vs_name) > 50:
if new_id != 539: # 539: Weeders ...
print(f"shortening {new_id}: {vs_name} -> {vs_name[:36]}")
vs_name = vs_name[:36]
vehicle_system_names[new_id] = vs_name
#vehicle_system_names.setdefault(ig_id, {}).setdefault(vs_id, vs_name)
new_id2 = 256 * new_id + int(f_id)
specific_functions[new_id2] = f_name
# Manufacturers csv
min_total = 1000 # 1396 as of 2023-10-18
f = zipf.read(isobus_files['manuf'])
lines = f.decode('UTF-8', 'replace').splitlines()
if len(lines) < min_total:
exit_msg("{}: Not enough entries ({})".format(isobus_files['manuf'], len(lines)))
manuf_csv = csv.reader(lines)
next(manuf_csv)
# PGN SPN csv
min_total = 20000 # 23756 as of 2023-10-18
f = zipf.read(isobus_files['pgn_spns'])
lines = f.decode('UTF-8', 'replace').splitlines()
if len(lines) < min_total:
exit_msg("{}: Not enough entries ({})".format(isobus_files['pgn_spns'], len(lines)))
pgn_names = {}
pgn_spn_csv = csv.reader(lines)
next(pgn_spn_csv)
for row in pgn_spn_csv:
try:
pgn_id, pgn_name, = row[:2]
if not pgn_name.startswith("Proprietary B"):
pgn_names[int(pgn_id)] = pgn_name.replace("\"","'")
except Exception:
pass
# prepare output file
try:
output_fd = io.open(isobus_output_path, 'w', encoding='UTF-8')
except Exception:
exit_msg("Couldn't open ({}) ".format(isobus_output_path))
output_fd.write('''/*
* This file was generated by running ./tools/make-isobus.py.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* The ISOBUS public listings available from:
* <https://www.isobus.net/isobus/attachments/isoExport_csv.zip>
*
*/
#ifndef __PACKET_ISOBUS_PARAMETERS_H__
#define __PACKET_ISOBUS_PARAMETERS_H__
''')
# Write Industries
output_fd.write("static const value_string _isobus_industry_groups[] = {\n")
for row in sorted(indust_csv, key=lambda x: int(x[0])):
output_fd.write(f" {{ {row[0]}, \"{row[1]}\" }},\n")
output_fd.write(" { 0, NULL }\n")
output_fd.write("};\n")
output_fd.write("static value_string_ext isobus_industry_groups_ext = VALUE_STRING_EXT_INIT(_isobus_industry_groups);\n\n")
# Write Vehicle System Names
output_fd.write("/* key: 256 * Industry-Group-ID + Vehicle-Group-ID */\n")
output_fd.write("static const value_string _isobus_vehicle_systems[] = {\n")
for key in sorted(vehicle_system_names):
output_fd.write(f" {{ {hex(key)}, \"{vehicle_system_names[key]}\" }},\n")
output_fd.write(" { 0, NULL }\n")
output_fd.write("};\n")
output_fd.write("static value_string_ext isobus_vehicle_systems_ext = VALUE_STRING_EXT_INIT(_isobus_vehicle_systems);\n\n")
# Write Global Name Functions
output_fd.write("static const value_string _isobus_global_name_functions[] = {\n")
for row in sorted(glbl_name_functions_csv, key=lambda x: int(x[0])):
output_fd.write(f" {{ {row[0]}, \"{row[1]}\" }},\n")
output_fd.write(" { 0, NULL }\n")
output_fd.write("};\n")
output_fd.write("static value_string_ext isobus_global_name_functions_ext = VALUE_STRING_EXT_INIT(_isobus_global_name_functions);\n\n")
# IG Specific Global Name Functions
output_fd.write("/* key: 65536 * Industry-Group-ID + 256 * Vehicle-System-ID + Function-ID */\n")
output_fd.write("static const value_string _isobus_ig_specific_name_functions[] = {\n")
for key in sorted(specific_functions):
output_fd.write(f" {{ {hex(key)}, \"{specific_functions[key]}\" }},\n")
output_fd.write(" { 0, NULL }\n")
output_fd.write("};\n")
output_fd.write("static value_string_ext isobus_ig_specific_name_functions_ext = VALUE_STRING_EXT_INIT(_isobus_ig_specific_name_functions);\n\n")
# Write Manufacturers
output_fd.write("static const value_string _isobus_manufacturers[] = {\n")
for row in sorted(manuf_csv, key=lambda x: int(x[0])):
output_fd.write(f" {{ {row[0]}, \"{row[1]}\" }},\n")
output_fd.write(" { 0, NULL }\n")
output_fd.write("};\n")
output_fd.write("static value_string_ext isobus_manufacturers_ext = VALUE_STRING_EXT_INIT(_isobus_manufacturers);\n\n")
# PGN Names
output_fd.write("static const value_string _isobus_pgn_names[] = {\n")
for key in sorted(pgn_names):
output_fd.write(f" {{ {key}, \"{pgn_names[key]}\" }},\n")
output_fd.write(" { 0, NULL }\n")
output_fd.write("};\n")
output_fd.write("static value_string_ext isobus_pgn_names_ext = VALUE_STRING_EXT_INIT(_isobus_pgn_names);\n\n")
output_fd.write("#endif /* __PACKET_ISOBUS_PARAMETERS_H__ */")
if __name__ == '__main__':
main()
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