Breakdown CIDR with netaddr

[wfsteadman]

Was wondering if anyone out here has created an IP based subnet script that will take a CIDR address and then break it down into all the subnets between the CIDR mask and say a /24 Like this: 100.114.208.0/22

This would be the expected output:
100.114.208.0/22
--> 100.114.208.0/23
----> 100.114.208.0/24
----> 100.114.209.0/24
--> 100.114.210.0/23
----> 100.114.210.0/24
----> 100.114.211.0/24
100.114.212.0/22
--> 100.114.212.0/23
----> 100.114.212.0/24
----> 100.114.213.0/24
--> 100.114.214.0/23
----> 100.114.214.0/24
----> 100.114.215.0/24

Below is the code I have so far and I am missing something because the output is incorrect and I can't figure out why...

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#!/usr/bin/env python from netaddr import IPAddress, IPNetwork   def cidr_range(ip, max=24):     print('Starting subnet: %s/%d' % (ip.ip, ip.prefixlen))     cidr(ip.ip, ip.prefixlen, max) def cidr(ip, width, max):     if width > max:       return     print('%s/%d' % (ip, width))     cidr(ip, width+1, max)     i = ip.value | (1 << (32-width-1))     ip2 = IPAddress(i)     print('%s/%d' % (ip2, width))     cidr(ip2, width+1, max) cidr_range(IPNetwork('100.114.208.0/22'))

These are the results I am getting and I am sure it has something to do with how I am recursing, but since I am new to using netaddr and have always been muddy on recursion I can't see what is going wrong.

100.114.208.0/21
100.114.208.0/22
100.114.208.0/23
100.114.208.0/24
100.114.208.128/24
100.114.209.0/23
100.114.209.0/24
100.114.209.128/24
100.114.210.0/22
100.114.210.0/23
100.114.210.0/24
100.114.210.128/24
100.114.211.0/23
100.114.211.0/24
100.114.211.128/24
100.114.212.0/21
100.114.212.0/22
100.114.212.0/23
100.114.212.0/24
100.114.212.128/24
100.114.213.0/23
100.114.213.0/24
100.114.213.128/24
100.114.214.0/22
100.114.214.0/23
100.114.214.0/24
100.114.214.128/24
100.114.215.0/23
100.114.215.0/24
100.114.215.128/24

Any assistance would be appreciated.
TIA
Wally

[wfsteadman]

I got it working using this:

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from netaddr import * import sys   network_list = [] subnet_list = []   def define_prefixlens(subnet_input, max):     max_cidr_val = int(max) + 1     ip = IPNetwork(subnet_input)     prefixes = (i for i in range(ip.prefixlen +1, max_cidr_val))     for i in prefixes:         network_list.append(i)   def list_of_subnets(subnet):     ip = IPNetwork(subnet)     for i in network_list:         sub = ip.subnet(i)         for i in sub:            subnet_list.append(i)   def main():     # value = sys.argv[1]     value = '10.20.30.0/27'     # max_cidr = sys.argv[2]     max_cidr = 24     define_prefixlens(value, max_cidr)     # print(network_list)     list_of_subnets(value)     for i in sorted(subnet_list):         print(i)   if __name__ == '__main__':     main()