ip-navigator

A comprehensive TypeScript package for IP address manipulation and subnet calculations.

Table of Contents

• Description
• Features
• Installation
• Usage
• API Reference
  • Validation Functions
  • Conversion Functions
  • Subnet Operations
  • IP Address Operations
• Testing
• Contributing
• License
• Bugs and Issues

Description

ip-navigator is a powerful and user-friendly TypeScript package designed to simplify IP address management and subnet calculations. Whether you're a network administrator, developer, or student learning about networking, this tool provides an intuitive set of functions for handling various IP address operations.

Features

• Validate IPv4 addresses and subnet masks
• Convert between decimal, binary, and integer IP formats
• Perform subnet calculations (network address, broadcast address, available hosts)
• Manipulate and compare IP addresses
• Work with CIDR notation
• Classify IP addresses (public, private)
• Generate IP address ranges
• Check if IP addresses belong to specific subnets
• Full TypeScript support with type definitions
• Comprehensive test suite using Jest
• Zero external dependencies

Installation

To install ip-navigator, run the following command in your terminal:

npm install ip-navigator

pnpm add ip-navigator

yarn add ip-navigator

Usage

ip-navigator is designed for use in TypeScript projects. Here's a basic example of how to use it:

import { isValidIPAddress, ipToBinary } from "ip-navigator";

// Example usage
console.log(isValidIPAddress("192.168.1.1")); // true
console.log(ipToBinary("192.168.1.1")); // '11000000.10101000.00000001.00000001'

API Reference

Validation Functions

isValidIPAddress(ipAddress: string): boolean

Validates whether the given string is a valid IPv4 address.

isValidIPAddress("192.168.1.1"); // returns true
isValidIPAddress("256.1.2.3"); // returns false

isValidSubnetMask(subnetMask: string): boolean

Checks if the given string is a valid subnet mask.

isValidSubnetMask("255.255.255.0"); // returns true
isValidSubnetMask("255.255.256.0"); // returns false

isValidCIDR(cidr: string): boolean

Checks if the given string is a valid CIDR notation.

isValidCIDR("192.168.1.0/24"); // returns true
isValidCIDR("192.168.1.0/33"); // returns false

Conversion Functions

ipToBinary(ipAddress: string): string

Converts an IPv4 address to its binary representation.

ipToBinary("192.168.1.1"); // returns '11000000.10101000.00000001.00000001'

binaryToIP(binaryIP: string): string

Converts a binary representation of an IP address to its decimal format.

binaryToIP("11000000.10101000.00000001.00000001"); // returns '192.168.1.1'

ipToInteger(ipAddress: string): number

Converts an IPv4 address to its integer representation.

ipToInteger("192.168.1.1"); // returns 3232235777

integerToIP(integer: number): string

Converts an integer representation of an IP address to its decimal format.

integerToIP(3232235777); // returns '192.168.1.1'

cidrToSubnetMask(prefix: number): string

Calculates the subnet mask from the given CIDR notation.

cidrToSubnetMask(24); // returns '255.255.255.0'
cidrToSubnetMask(16); // returns '255.255.0.0'

subnetMaskToCIDR(subnetMask: string): number

Calculates the CIDR notation from the given subnet mask.

subnetMaskToCIDR("255.255.255.0"); // returns 24
subnetMaskToCIDR("255.255.0.0"); // returns 16

Subnet Operations

calculateNetworkAddress(ipAddress: string, subnetMask: string): string

Calculates the network address based on an IP address and subnet mask.

calculateNetworkAddress("192.168.1.100", "255.255.255.0"); // returns '192.168.1.0'

calculateBroadcastAddress(ipAddress: string, subnetMask: string): string

Calculates the broadcast address based on an IP address and subnet mask.

calculateBroadcastAddress("192.168.1.100", "255.255.255.0"); // returns '192.168.1.255'

calculateAvailableIPs(networkAddress: string, subnetMask: string): string[]

Calculates the available IP addresses in a subnet.

calculateAvailableIPs("192.168.1.0", "255.255.255.252");
// returns ['192.168.1.1', '192.168.1.2']

Note: For large subnets, be aware of potential memory usage when generating the full list.

getSubnetInfo(ipAddress: string, subnetMask: string): SubnetInfo

Retrieves comprehensive information about a subnet.

getSubnetInfo("192.168.1.100", "255.255.255.0");
// returns {
//   networkAddress: '192.168.1.0',
//   broadcastAddress: '192.168.1.255',
//   totalHosts: 256,
//   usableHosts: 254,
//   firstUsableHost: '192.168.1.1',
//   lastUsableHost: '192.168.1.254'
// }

IP Address Operations

getNextIPAddress(ipAddress: string): string

Returns the next IP address in sequential order.

getNextIPAddress("192.168.1.1"); // returns '192.168.1.2'

getPreviousIPAddress(ipAddress: string): string

Returns the previous IP address in sequential order.

getPreviousIPAddress("192.168.1.2"); // returns '192.168.1.1'

isIPAddressInSubnet(ipAddress: string, networkAddress: string, subnetMask: string): boolean

Checks if an IP address belongs to a given subnet.

isIPAddressInSubnet("192.168.1.100", "192.168.1.0", "255.255.255.0"); // returns true

isPublicIP(ipAddress: string): boolean

Checks if an IP address is a public IP address.

isPublicIP("8.8.8.8"); // returns true
isPublicIP("192.168.1.1"); // returns false

isPrivateIP(ipAddress: string): boolean

Checks if an IP address is a private IP address.

isPrivateIP("192.168.1.1"); // returns true
isPrivateIP("8.8.8.8"); // returns false

getIPRange(startIP: string, endIP: string): string[]

Generates an array of IP addresses within the specified range.

getIPRange("192.168.1.1", "192.168.1.3");
// returns ['192.168.1.1', '192.168.1.2', '192.168.1.3']

compareIPAddresses(ip1: string, ip2: string): -1 | 0 | 1

Compares two IP addresses numerically.

compareIPAddresses("192.168.1.1", "192.168.1.2"); // returns -1
compareIPAddresses("192.168.1.1", "192.168.1.1"); // returns 0
compareIPAddresses("192.168.1.2", "192.168.1.1"); // returns 1

Testing

ip-navigator uses Jest for unit testing. To run the tests, use the following command:

pnpm test # or npm test

Our test suite covers all functions in the package, ensuring reliability and correctness. We strive for high test coverage and encourage contributors to write tests for any new features or bug fixes.

Contributing

We welcome contributions from the community! If you'd like to contribute to ip-navigator, please follow these steps:

1. Fork the repository
2. Create a new branch for your feature or bug fix
3. Make your changes and write tests if applicable
4. Ensure all tests pass by running pnpm test # or npm test
5. Commit your changes and push to your fork
6. Create a pull request with a clear description of your changes

Please ensure that your code adheres to the existing style and that all tests pass before submitting a pull request.

License

This project is licensed under the MIT License. See the LICENSE file for details.

Author

Marc Tyson CLEBERT contact@marctysonclebert.com

• Website: marctysonclebert.com
• GitHub: @clebertmarctyson
• Twitter/X: @ClebertTyson
• Buy me a coffee: Support my work

Bugs and Issues

If you encounter any bugs or have suggestions for improvements, please report them on our GitHub Issues page. When reporting an issue, please include:

• A clear and descriptive title
• A detailed description of the issue
• Steps to reproduce the problem
• Expected behavior
• Actual behavior
• Any relevant code snippets or error messages

Your feedback helps us improve ip-navigator for everyone!

Support the Project

If ip-navigator has been helpful to you, consider:

• ⭐ Starring the repo
• ☕ Buying me a coffee

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