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#!/usr/bin/env python
#
# Parses the CSV version of the IANA Service Name and Transport Protocol Port Number Registry
# and generates a services(5) file.
#
# Wireshark - Network traffic analyzer
# By Gerald Combs <gerald@wireshark.org>
# Copyright 2013 Gerald Combs
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
iana_svc_url = 'http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.csv'
__doc__ = '''\
Usage: make-services.py [url]
url defaults to
%s
''' % (iana_svc_url)
import sys
import getopt
import csv
import re
python_version = sys.hexversion >> 16
if python_version < 0x300:
import urllib
else:
import urllib.request, urllib.error, urllib.parse
import codecs
services_file = 'services'
exclude_services = [
'^spr-itunes',
'^spl-itunes',
'^shilp',
]
exclude_comments = [
'should not be used for discovery purposes',
'NOTE Conflict',
]
min_body_size = 900000 # Size was ~ 922000 on 2013-08-06
def parse_rows(svc_fd):
lines = []
port_reader = csv.reader(svc_fd)
# Header positions as of 2013-08-06
if python_version < 0x206:
headers = port_reader.next()
else:
headers = next(port_reader)
try:
sn_pos = headers.index('Service Name')
except:
sn_pos = 0
try:
pn_pos = headers.index('Port Number')
except:
pn_pos = 1
try:
tp_pos = headers.index('Transport Protocol')
except:
tp_pos = 2
positions = [sn_pos, pn_pos, tp_pos]
positions.sort()
positions.reverse()
for row in port_reader:
service = row[sn_pos]
port = row[pn_pos]
proto = row[tp_pos]
if len(service) < 1 or len(port) < 1 or len(proto) < 1:
continue
for pos in positions:
del row[pos]
row = filter(None, row)
comment = ' '.join(row)
comment = re.sub('[\n]', '', comment)
if re.search('|'.join(exclude_services), service):
continue
if re.search('|'.join(exclude_comments), comment):
continue
lines.append('%-15s %5s/%s # %s' % (
service,
port,
proto,
comment
))
return '\n'.join(lines)
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 main(argv):
try:
opts, args = getopt.getopt(argv, "h", ["help"])
except getopt.GetoptError:
exit_msg()
for opt, arg in opts:
if opt in ("-h", "--help"):
exit_msg(None, 0)
if (len(argv) > 0):
svc_url = argv[0]
else:
svc_url = iana_svc_url
try:
if python_version < 0x300:
svc_fd = urllib.urlopen(svc_url)
else:
req = urllib.request.urlopen(svc_url)
svc_fd = codecs.getreader('utf8')(req)
except:
exit_msg('Error opening ' + svc_url)
body = parse_rows(svc_fd)
if len(body) < min_body_size:
exit_msg('Not enough parsed data')
out = open(services_file, 'w')
out.write('''\
# This is a local copy of the IANA port-numbers file.
#
# Wireshark uses it to resolve port numbers into human readable
# service names, e.g. TCP port 80 -> http.
#
# It is subject to copyright and being used with IANA's permission:
# http://www.wireshark.org/lists/wireshark-dev/200708/msg00160.html
#
# The original file can be found at:
# %s
#
%s
''' % (iana_svc_url, body))
if __name__ == "__main__":
sys.exit(main(sys.argv[1:]))
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