ipv4

Extension for asserting IPv4 addresses

isInSubnet

Returns true is the supplied IP belongs to the supplied subnet in CIDR notation.

Use this function to assert that a client belongs to a specific network.

IP-addresses should be octets in dotted-string format: '192.168.30.5'

Subnets are specified using CIDR notation containing an ip and the length of the subnet mask: '10.1.1.0/24'

Syntax

ipv4.isInSubnet(ip, subnet)

Arguments

Name	Type	Description
ip	string	The IP-address in octets
subnet	string	The subnet in CIDR-notation

Example

ipv4.isInSubnet('127.0.0.1', '127.0.0.0/8') // true

ipv4.isInSubnet('192.168.10.25', '192.168.10.0/24') // true
ipv4.isInSubnet('192.168.10.25', '192.168.0.0/16') // true

ipv4.isInSubnet('192.168.10.25', '10.0.1.0/24') // false
ipv4.isInSubnet('192.168.10.25', '192.168.11.0/24') // false