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#!/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('--single', action='store', help='Validate and allow only one route-target')
group.add_argument('--multi', action='store', help='Validate multiple, whitespace separated route-targets')
args = parser.parse_args()
def is_valid_rt(rt):
# every route target needs to have a colon and must consists of two parts
value = rt.split(':')
if len(value) != 2:
return False
# A route target 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.single:
if not is_valid_rt(args.single):
exit(1)
elif args.multi:
for rt in args.multi.split(' '):
if not is_valid_rt(rt):
exit(1)
else:
parser.print_help()
exit(1)
exit(0)
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