#!/usr/bin/env python3 # # Copyright (C) 2021 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/>. from argparse import ArgumentParser from vyos.template import is_ipv4 parser = ArgumentParser() group = parser.add_mutually_exclusive_group() group.add_argument('--route-distinguisher', action='store', help='Validate BGP route distinguisher') group.add_argument('--route-target', action='store', help='Validate one BGP route-target') group.add_argument('--route-target-multi', action='store', help='Validate multiple, whitespace separated BGP route-targets') args = parser.parse_args() def is_valid(rt): """ Verify BGP RD/RT - both can be verified using the same logic """ # every RD/RT (route distinguisher/route target) needs to have a colon and # must consists of two parts value = rt.split(':') if len(value) != 2: return False # An RD/RT must either be only numbers, or the first part must be an IPv4 # address if (is_ipv4(value[0]) or value[0].isdigit()) and value[1].isdigit(): return True return False if __name__ == '__main__': if args.route_distinguisher: if not is_valid(args.route_distinguisher): exit(1) elif args.route_target: if not is_valid(args.route_target): exit(1) elif args.route_target_multi: for rt in args.route_target_multi.split(' '): if not is_valid(rt): exit(1) else: parser.print_help() exit(1) exit(0)