72 lines
2.6 KiB
Python
Executable File
72 lines
2.6 KiB
Python
Executable File
# BSD 2-Clause License
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# Copyright (c) 2020, Supreeth Herle
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# All rights reserved.
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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# 1. Redistributions of source code must retain the above copyright notice, this
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# list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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import click
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import sys
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import ipaddress
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"""
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Script used to fetch first IP address in a given IP range. i.e. the calling bash script reads the std output
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Usage in command line:
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e.g:
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$ python3 ip_utils.py --ip_range 192.168.100.0/24
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$ python3 ip_utils.py --ip_range 2001:230:cafe::/48
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"""
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def validate_ip_net(ctx, param, value):
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try:
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ip_net = ipaddress.ip_network(value)
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return ip_net
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except ValueError:
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raise click.BadParameter(
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'Value does not represent a valid IPv4/IPv6 range')
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@click.command()
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@click.option('--ip_range',
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required=True,
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callback=validate_ip_net,
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help='UE IPv4/IPv6 Address range in CIDR format e.g. 192.168.100.0/24 or 2001:230:cafe::/48')
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def start(ip_range):
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# Get the first IP address in the IP range and netmask prefix length
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first_ip_addr = next(ip_range.hosts(), None)
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if not first_ip_addr:
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raise ValueError('Invalid UE IPv4 range. Only one IP given')
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else:
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first_ip_addr = first_ip_addr.exploded
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ip_netmask_prefix = ip_range.prefixlen
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print(str(first_ip_addr) + '/' + str(ip_netmask_prefix))
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if __name__ == '__main__':
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try:
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start()
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sys.exit(0)
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except ValueError:
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sys.exit(1)
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