https://github.com/gvicentin/sc

Subnet Calculator CLI
https://github.com/gvicentin/sc

c cli networking subnetting

Last synced: 9 months ago
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Subnet Calculator CLI

• Host: GitHub
• URL: https://github.com/gvicentin/sc
• Owner: gvicentin
• License: mit
• Created: 2022-07-10T14:26:53.000Z (almost 4 years ago)
• Default Branch: master
• Last Pushed: 2023-06-27T18:00:05.000Z (about 3 years ago)
• Last Synced: 2025-03-17T19:47:02.458Z (over 1 year ago)
• Topics: c, cli, networking, subnetting
• Language: C
• Homepage:
• Size: 41 KB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

          
# Subnet Calculator (sc)

![Latest Release](https://img.shields.io/github/v/release/gvicentin/sc)

![License](https://img.shields.io/github/license/gvicentin/sc)

![Build And Tests Status](https://img.shields.io/github/actions/workflow/status/gvicentin/sc/pr-validation.yaml?label=build%20and%20tests&logo=c&logoColor=lightblue)

A command line tool that enables subnet network calculations using **CIDR notation**.

To use it, you can type your range directly in CIDR notation, and see the IP

information about that range.

This simple subnet calculator is **written in C**. It was created as a study about using

bitwise operators and basic IPv4 subnetting (Networking course).

## Installing

Check the release page if you don't want to build from

the source code.

```sh

# Clone repository and compile

git clone https://github.com/gvicentin/sc.git && cd sc/

make

```

Make sure to include the binary on your `$PATH`.

For example.

```sh

# Copy binary and create symbolic link

LOCALBIN="${HOME}/.local/bin"

cp bin/sc-0.1.0 $LOCALBIN

cd $LOCALBIN && ln -s sc-0.1.0 sc

```

## Usage

Use the command passing the IP in the CIDR notation,

e.g. `sc 172.16.65.23/20`.

```sh

sc 172.16.65.23/20

====================================

|            SUBNET CALC           |

====================================

IP:                     172.16.65.23

IP Hex:                     AC104117

IP Long:                  2886746391

CIDR Block:           172.16.64.0/20

Broadcast:             172.16.79.255

------------------------------------

Mask:                  255.255.240.0

Mask Hex:                   FFFFF000

Mask Long:                4294963200

Mask Bits:                        20

Num of Hosts:                   4096

```

## Local development

To run unit tests, simply do the following.

```sh

make test

```