ip6

IPv6 address helper utilities. ip6.sh

Usage no npm install needed!

<script type="module">
  import ip6 from 'https://cdn.skypack.dev/ip6';
</script>

README

ip6

IPv6 address helper utilities. ip6.sh

Installation

Module

npm install ip6

Standalone

npm install ip6 -g

Module Usage

To normalize IPv6 addresses

let ip6 = require('ip6');

console.log(ip6.normalize('2404:6800:4003:808::200e'));
// 2404:6800:4003:0808:0000:0000:0000:200e
console.log(ip6.normalize('2404:6800:4003:0808:0000:0000:0000:200e'));
// 2404:6800:4003:0808:0000:0000:0000:200e
console.log(ip6.normalize('2404:6800:4003:808::'));
// 2404:6800:4003:0808:0000:0000:0000:0000
console.log(ip6.normalize('2404:68::'));
// 2404:0068:0000:0000:0000:0000:0000:0000
console.log(ip6.normalize('2404:0068:0000:0000:0000:0000:0000:0000'));
// 2404:0068:0000:0000:0000:0000:0000:0000
console.log(ip6.normalize('2404:6800:4003:0808:0:0:0:200e'));
// 2404:6800:4003:0808:0000:0000:0000:200e
console.log(ip6.normalize('::1'));
// 0000:0000:0000:0000:0000:0000:0000:0001

To abbreviate IPv6 addresses

console.log(ip6.abbreviate('2001:0000:0111:0000:0011:0000:0001:0000'));
// 2001:0:111:0:11:0:1:0
console.log(ip6.abbreviate('2001:0001:0000:0001:0000:0000:0000:0001'));
// 2001:1:0:1::1
console.log(ip6.abbreviate('2001:0001:0000:0001:0000:0000:0000:0000'));
// 2001:1:0:1::
console.log(ip6.abbreviate('0000:0000:0000:0000:0000:0000:0000:0000'));
// ::
console.log(ip6.abbreviate('0000:0000:0000:0000:0000:0000:0000:0001'));
// ::1
console.log(ip6.abbreviate('2041:0000:140F:0000:0000:0000:875B:131B'));
// 2041:0:140F::875B:131B
console.log(ip6.abbreviate('2001:0001:0002:0003:0004:0005:0006:0007'));
// 2001:1:2:3:4:5:6:7

To divide a /64 subnet into 4 /66 subnets

let subnets = ip6.divideSubnet("2607:5300:60:1234::", 64, 66);
console.log(subnets);
/*
outputs:
[ '2607:5300:0060:1234:0000:0000:0000:0000',
  '2607:5300:0060:1234:4000:0000:0000:0000',
  '2607:5300:0060:1234:8000:0000:0000:0000',
  '2607:5300:0060:1234:c000:0000:0000:0000' ]
*/

To divide a /64 subnet into /128 subnets, but limit to 8 addresses

let subnets = ip6.divideSubnet("2607:5300:60:1234::", 64, 128, 8);
console.log(subnets);
/*
[ '2607:5300:0060:1234:0000:0000:0000:0000',
  '2607:5300:0060:1234:0000:0000:0000:0001',
  '2607:5300:0060:1234:0000:0000:0000:0002',
  '2607:5300:0060:1234:0000:0000:0000:0003',
  '2607:5300:0060:1234:0000:0000:0000:0004',
  '2607:5300:0060:1234:0000:0000:0000:0005',
  '2607:5300:0060:1234:0000:0000:0000:0006',
  '2607:5300:0060:1234:0000:0000:0000:0007' ]
*/

To divide a /64 subnet into /128 subnets, but limit to 8 abbreviated addresses

let subnets = ip6.divideSubnet("2607:5300:60:1234::", 64, 128, 8, true);
console.log(subnets);
/*
[ '2607:5300:60:1234::',
  '2607:5300:60:1234::1',
  '2607:5300:60:1234::2',
  '2607:5300:60:1234::3',
  '2607:5300:60:1234::4',
  '2607:5300:60:1234::5',
  '2607:5300:60:1234::6',
  '2607:5300:60:1234::7' ]
*/

To generate 5 random /128 from a /48 (output in abbreviated mode):

let r = ip6.randomSubnet("2607:5300:60::", 48, 128, 5, true);
console.log(r);
/*
[ '2607:5300:60:ba28:1acc:11ef:23a:770',
  '2607:5300:60:c1e:1f2:4b93:f2e6:bc31',
  '2607:5300:60:58b3:df4c:d91b:508f:b022',
  '2607:5300:60:fec3:4790:f791:ae5b:8675',
  '2607:5300:60:41b9:20a8:dd08:1c9e:7bc3' ]
*/

To calculate the range and size of a /64 subnet:

let range = ip6.range("2607:5300:60:1234::", 64, 128);
console.log(range);
/*
{ start: '2607:5300:0060:1234:0000:0000:0000:0000',
  end: '2607:5300:0060:1234:ffff:ffff:ffff:ffff',
  size: 18446744073709552000 }
 */

To calculate the range and size of a /48 subnet divided into /56 subnets (output in abbreviated mode):

let range = ip6.range("2607:5300:60::", 48, 56, true);
console.log(range);
/*
{ start: '2607:5300:60::',
  end: '2607:5300:60:ff00::',
  size: 256 }
 */

To generate a PTR record for DNS zone file:

let ptr = ip6.ptr("2607:5300:60:1234:cafe:babe:dead:beef", 64);
console.log(ptr);
// f.e.e.b.d.a.e.d.e.b.a.b.e.f.a.c

Standalone Usage

To normalize an IPv6 address:

ip6 -n 2001:db8::
2001:0db8:0000:0000:0000:0000:0000:0000

To abbreviate an IPv6 address:

ip6 -a 2001:0db8:0000:0000:0000:0000:0000:0000
2001:db8::

To divide a /64 subnet into 4 /66 subnets:

ip6 -d 2001:db8:: 64 66
2001:0db8:0000:0000:0000:0000:0000:0000
2001:0db8:0000:0000:4000:0000:0000:0000
2001:0db8:0000:0000:8000:0000:0000:0000
2001:0db8:0000:0000:c000:0000:0000:0000

To divide a /64 subnet into /80 subnets, but outputs only 5 subnets:

ip6 -d 2001:db8:: 64 80 5
2001:0db8:0000:0000:0001:0000:0000:0000
2001:0db8:0000:0000:0002:0000:0000:0000
2001:0db8:0000:0000:0003:0000:0000:0000
2001:0db8:0000:0000:0004:0000:0000:0000
2001:0db8:0000:0000:0005:0000:0000:0000

To divide a /64 subnet into /80 subnets, but outputs only 5 subnets in abbreviated mode:

ip6 -d -s 2001:db8:: 64 80 5
2001:db8:0:0:1::
2001:db8:0:0:2::
2001:db8:0:0:3::
2001:db8:0:0:4::
2001:db8:0:0:5::

To generate 5 random /56 subnets from a /48 subnets:

ip6 -r -s 2607:5300:60:: 48 56 5
2607:5300:60:6300::
2607:5300:60:f300::
2607:5300:60:7000::
2607:5300:60:ce00::
2607:5300:60:9100::

To calculate the range and size of a /48 subnet divided into /56 subnets (output in abbreviated mode):

ip6 -R -s 2607:5300:60:: 48 56
{"start":"2607:5300:60::","end":"2607:5300:60:ff00::","size":256}

To generate a PTR record for DNS zone file:

ip6 -p 2607:5300:60:1234:cafe:babe:dead:beef 64
f.e.e.b.d.a.e.d.e.b.a.b.e.f.a.c

License

The MIT License (MIT)

Copyright (c) 2016 Qian Chen

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.