AWS WAF CIDR converter

Conversion between typical CIDR ranges and the ranges allowed by AWS WAF:

AWS WAF supports /8, /16, /24, and /32 IPv4 address ranges and /16, /24, /32, /56, /64, and /128 IPv6 address ranges

Usage

$ ./converter.py -h
usage: converter.py [-h] cidr_range

Converts CIDR ranges into AWS WAF IP Set allowed ranges

positional arguments:
  cidr_range  eg. 192.168.0.0/23

optional arguments:
  -h, --help  show this help message and exit

$ ./converter.py 192.168.0.0/23
192.168.0.0/24
192.168.1.0/24

Requirements

Supports both Python 2.7 and 3.6 (others may run but no tests are ran against them).

For Python2 you will need to install some dependencies:

pip install -r requirements.txt

These are backported modules from Python3's Standard Library so Python3 has no such dependencies.

Contributing

Running the tests

To run all the tests for both Python2.7 and 3.6 just run:

tox

Obviously you will need tox available but this will install all dependencies for each environment in a virtual environment.

There is a pre-commit hook available that will automatically run the tests for you. Simply copy it into your .git/hooks folder to install it:

cp pre-commit .git/hooks/