IPv4

npm install --save net-ipv4

Usage

CommonJS:

const IPv4 = require( 'net-ipv4' )
const IPv4Subnet = require( 'net-ipv4/subnet' )

ES Module:

import IPv4 from 'net-ipv4'
import IPv4Subnet from 'net-ipv4/subnet'

API

IPv4

Constants

• IPv4.BITS = 32
  Width of an IPv4 address in bits
• IPv4.MIN = 0x00000000
  Lowest IPv4 address value
• IPv4.MAX = 0xFFFFFFFF
  Highest IPv4 address value

Static Methods

• IPv4.isValid( string value ) : boolean
  Check whether a given string is valid IPv4 address
• IPv4.reverseName( string|number address ) : string
  Get the reverse DNS name for the given IPv4 address
• IPv4.toNumber( string address ) : number
  Convert a string representing an IPv4 address into an integer
• IPv4.toString( number address ) : string
  Convert a number representing an IPv4 address into its string representation

IPv4Subnet

Constructor

• new IPv4Subnet( string address, number prefixLength )

Instance Properties

• subnet.prefixLength number
  Length of the netmask prefix in bits
• subnet.address number
  IPv4 address
• subnet.mask number
  Netmask
• subnet.low number
  Lowest address in the block
• subnet.high number
  Highest address in the block
• get subnet.wildcardMask number
  Wildcard mask
• get subnet.addressCount number
  Number of addresses in the subnet

Instance Methods

• subnet.inRange( number address ) : boolean
  Whether a given address is within this subnet
• subnet.toString() : string
  Get the string representation of the subnet

Static Methods

• fromRange( number low, number high ) : IPv4Subnet
• wildcardMask( number prefixLength ) : number
• netmask( number prefixLength ) : number