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#! /usr/bin/env python3
#
# Copyright (C) 2024 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# 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, see <http://www.gnu.org/licenses/>.
import sys
from vyos.utils.process import call
options = {
'port': {
'cmd': '{command} -p {value}',
'type': '<1-65535> <list>',
'help': 'Scan specified ports.'
},
'tcp': {
'cmd': '{command} -sT',
'type': 'noarg',
'help': 'Use TCP scan.'
},
'udp': {
'cmd': '{command} -sU',
'type': 'noarg',
'help': 'Use UDP scan.'
},
'skip-ping': {
'cmd': '{command} -Pn',
'type': 'noarg',
'help': 'Skip the Nmap discovery stage altogether.'
},
'ipv6': {
'cmd': '{command} -6',
'type': 'noarg',
'help': 'Enable IPv6 scanning.'
},
}
nmap = 'sudo /usr/bin/nmap'
class List(list):
def first(self):
return self.pop(0) if self else ''
def last(self):
return self.pop() if self else ''
def prepend(self, value):
self.insert(0, value)
def completion_failure(option: str) -> None:
"""
Shows failure message after TAB when option is wrong
:param option: failure option
:type str:
"""
sys.stderr.write('\n\n Invalid option: {}\n\n'.format(option))
sys.stdout.write('<nocomps>')
sys.exit(1)
def expansion_failure(option, completions):
reason = 'Ambiguous' if completions else 'Invalid'
sys.stderr.write(
'\n\n {} command: {} [{}]\n\n'.format(reason, ' '.join(sys.argv),
option))
if completions:
sys.stderr.write(' Possible completions:\n ')
sys.stderr.write('\n '.join(completions))
sys.stderr.write('\n')
sys.stdout.write('<nocomps>')
sys.exit(1)
def complete(prefix):
return [o for o in options if o.startswith(prefix)]
def convert(command, args):
while args:
shortname = args.first()
longnames = complete(shortname)
if len(longnames) != 1:
expansion_failure(shortname, longnames)
longname = longnames[0]
if options[longname]['type'] == 'noarg':
command = options[longname]['cmd'].format(
command=command, value='')
elif not args:
sys.exit(f'port-scan: missing argument for {longname} option')
else:
command = options[longname]['cmd'].format(
command=command, value=args.first())
return command
if __name__ == '__main__':
args = List(sys.argv[1:])
host = args.first()
if host == '--get-options-nested':
args.first() # pop execute
args.first() # pop port-scan
args.first() # pop host
args.first() # pop <host>
usedoptionslist = []
while args:
option = args.first() # pop option
matched = complete(option) # get option parameters
usedoptionslist.append(option) # list of used options
# Select options
if not args:
# remove from Possible completions used options
for o in usedoptionslist:
if o in matched:
matched.remove(o)
if not matched:
sys.stdout.write('<nocomps>')
else:
sys.stdout.write(' '.join(matched))
sys.exit(0)
if len(matched) > 1:
sys.stdout.write(' '.join(matched))
sys.exit(0)
# If option doesn't have value
if matched:
if options[matched[0]]['type'] == 'noarg':
continue
else:
# Unexpected option
completion_failure(option)
value = args.first() # pop option's value
if not args:
matched = complete(option)
helplines = options[matched[0]]['type']
sys.stdout.write(helplines)
sys.exit(0)
command = convert(nmap, args)
call(f'{command} -T4 {host}')
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