iipp

Small module to parse and work with IPv4 and IPv6 addresses.

Features:

• Parsing IPv4 and IPv6 Addresses with CIDR
• Printing IPv4 and IPv6 (compressed and uncompressed)
• Checking whether an address or an subnet is covered/included in another one

Usage

Parse IPv4 address

let address = V4Address.parse('1.2.3.4');

If an invalid address is given, null is returned.

Parse IPv6 address

let address = V6Address.parse('::1');

If an invalid address is given, null is returned.

Check whether a subnet covers/includes another one

let net = V4Address.parse('10.0.0.0/8');
let address = V4Address.parse('5.0.0.0');
net.covers(address); // => false

The covers method also accepts a string. If the given string is not a valid address, false is returned.

let net = V4Address.parse('10.0.0.0/8');
net.covers('5.0.0.0'); // => false
net.covers('10.2.3.4'); // => true
net.covers('10.0.0.300'); // => false

Available types

Address

Base class representing an address or net.

Attributes

• addressType: int 4 or 6 - size: int Address size in bits (32 or 128)
• bytes: int[] Address data as 8-bit unsigned
• subnetSize: int Size of the subnet mask in bits

Methods

• covers(Address | string): bool Checks whether the current net covers/includes the given address
• toString({ appendCIDR = undefined, uncompressed = false }): string Formats the address to a string
  • appendCIDR: When appendCIDR is undefined, the CIDR is appended only when the address object defines a subnet
  • uncompressed: The uncompressed parameter takes effect only on V6Address objects

V4Address extends Address

IPv4 address or net.

Attributes

• addressType: int => 4
• size: int => 32
• bytes: int[4] Address data as 8-bit unsigned ints
• subnetSize: int Size of the subnet mask in bits

Methods

• covers(Address | string): bool Checks whether the current net covers/includes the given address
• toString({ appendCIDR = undefined }): string Formats the address to a string
  • appendCIDR: When appendCIDR is undefined, the CIDR is appended only when the address object defines a subnet
• clone(): V4Address Creates clone of this address object
• static parse(string): V4Address Parses an IPv4 address or net. Returns null for invalid data.

V6Address extends Address

IPv6 address or net.

Attributes

• addressType: int => 6
• size: int => 128
• bytes: int[16] Address data as 8-bit unsigned ints
• blocks: int[8] Address data as 16-bit unsigned ints
• subnetSize: int Size of the subnet mask in bits

Methods

• covers(Address | string): bool Checks whether the current net covers/includes the given address
• toString({ appendCIDR = true, uncompressed = false }): string Formats the address to a string
  • appendCIDR: When appendCIDR is undefined, the CIDR is appended only when the address object defines a subnet
• toUncompressedString({ appendCIDR = undefined }): string Formats the address to a string
  • appendCIDR: When appendCIDR is undefined, the CIDR is appended only when the address object defines a subnet
• clone(): V6Address Creates clone of this address object
• static parse(string): V6Address Parses an IPv6 address or net. Returns null for invalid data.

Examples

let address = V4Address.parse('1.2.3.4');
/* address => V4Address
	- addressType: 4
	- size: 32
	- bytes: [1, 2, 3, 4]
	- subnetSize: 32
*/

let address = V4Address.parse('5.6.7.8/12');
/* address => V4Address
	- addressType: 4
	- size: 32
	- bytes: [5, 6, 7, 8]
	- subnetSize: 12
*/


let address = V4Address.parse('1.2.288.4'); //Invalid valid at position 3
/* address => null */

let address = V4Address.parse('1.2.3.4/42'); //Invalid CIDR value
/* address => null */



let address = V6Address.parse('::1');
/* address => V6Address
	- addressType: 6
	- size: 128
	- bytes: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1]
	- subnetSize: 128
*/
address.toUncompressedString(); // => 0000:0000:0000:0000:0000:0000:0000:0001/128
address.toString(); // => ::1
address.toString({ appendCIDR: true }); // => ::1/128


let address = V6Address.parse('::1:0:0:0:0:0/100');
/* address => V6Address
	- addressType: 6
	- size: 128
	- bytes: [0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
	- subnetSize: 128
*/
address.toUncompressedString(); // => 0000:0000:0001:0000:0000:0000:0000:0000/100
address.toString(); // => 0:0:1::/100
address.toString({ appendCIDR: false }); // => 0:0:1::