#!/usr/bin/env python3 # # Copyright (C) 2020 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 re from sys import argv,exit if __name__ == '__main__': if len(argv) != 2: exit(1) input = argv[1] try: # IP protocol can be in the range 0 - 255, thus the range must end with 256 if int(input) in range(0, 256): exit(0) except ValueError: pass pattern = "!?\\b(all|ip|hopopt|icmp|igmp|ggp|ipencap|st|tcp|egp|igp|pup|udp|" \ "tcp_udp|hmp|xns-idp|rdp|iso-tp4|dccp|xtp|ddp|idpr-cmtp|ipv6|" \ "ipv6-route|ipv6-frag|idrp|rsvp|gre|esp|ah|skip|ipv6-icmp|" \ "ipv6-nonxt|ipv6-opts|rspf|vmtp|eigrp|ospf|ax.25|ipip|etherip|" \ "encap|99|pim|ipcomp|vrrp|l2tp|isis|sctp|fc|mobility-header|" \ "udplite|mpls-in-ip|manet|hip|shim6|wesp|rohc)\\b" if re.match(pattern, input): exit(0) exit(1)