CIDR to Addressable IPs Converter

This Python script allows users to convert CIDR blocks into their addressable IP addresses. It supports processing a single CIDR block or multiple blocks provided in a file.

Features

• Converts a single CIDR block into a list of addressable IPs.
• Processes files containing multiple CIDR blocks (one per line).
• Validates input and handles errors gracefully.

Requirements

• Python 3.6 or later.

Installation

1. Clone the repository or download the script file.
2. Ensure Python is installed on your system.

Usage

Run the script from the command line using the following syntax:

Single CIDR Block

python script.py <CIDR_BLOCK>

Example:

python script.py 192.168.1.0/30

Output:

192.168.1.1
192.168.1.2

File with CIDR Blocks

python script.py <FILE_PATH> --file

Example:

python script.py cidr_list.txt --file

Output:

192.168.1.0/30:
  192.168.1.1
  192.168.1.2
10.0.0.0/29:
  10.0.0.1
  10.0.0.2
  10.0.0.3

Script Options

• input: Required. Accepts a CIDR block (e.g., 192.168.1.0/24) or a file path.
• -f, --file: Optional. Indicates that the input is a file containing CIDR blocks.

Error Handling

• Invalid CIDR blocks will produce an error message without crashing the script.
• Missing files will prompt a "File not found" message.

Example File Format

For processing multiple CIDR blocks, create a text file (cidr_list.txt) with each CIDR block on a separate line:

192.168.1.0/30
10.0.0.0/29
172.16.0.0/28