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