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##############################################################################
# Copyright (c) 2016 Feng Pan (fpan@redhat.com) and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################
import ipaddress
def generate_ip_range(args):
"""
Generate IP range in string format for given CIDR.
This function works for both IPv4 and IPv6.
args is expected to contain the following members:
CIDR: any valid CIDR representation.
start_position: starting index, default to first address in subnet (1)
end_position: ending index, default to last address in subnet (-1)
Returns IP range in string format. A single IP is returned if start and end IPs are identical.
"""
cidr = ipaddress.ip_network(args.CIDR)
(start_index, end_index) = (args.start_position, args.end_position)
if cidr[start_index] == cidr[end_index]:
return str(cidr[start_index])
else:
return ','.join(sorted([str(cidr[start_index]), str(cidr[end_index])]))
def main():
import argparse
import sys
parser = argparse.ArgumentParser()
subparsers = parser.add_subparsers()
parser_gen_ip_range = subparsers.add_parser('generate_ip_range', help='Generate IP Range given CIDR')
parser_gen_ip_range.add_argument('CIDR', help='Network in CIDR notation')
parser_gen_ip_range.add_argument('start_position', type=int, help='Starting index')
parser_gen_ip_range.add_argument('end_position', type=int, help='Ending index')
parser_gen_ip_range.set_defaults(func=generate_ip_range)
args = parser.parse_args(sys.argv[1:])
print(args.func(args))
if __name__ == '__main__':
main()
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