How to validate IPV6 network prefix in javascript

Question

I am trying to validate certain IPV6 network prefix to create a subnet. I am unable to validate the network prefix using JavaScript regular expression. Can anyone help.

Format of some network prefix as below

2001:0000:1234:0000 
2001:0:1234:0
3ffe:0b00::
3ffe:b00::1
FF02::
FF02::1
::1
::
::ffff:192
3ffe:0b00:0000:0001
FF02:0000:0000:0000
FF02::
ff02::1 
fe80::

@Ron Maupin as of my knowledge all the samples are valid. If you are thinking these samples are not valid please suggest valid samples and propose a solution. — MANOJ, Jul 24 '18 at 07:21
We are not a site where you get people to do your work for you for free. — Michael Hampton, Jul 24 '18 at 13:19

score 0 · Accepted Answer · answered Jul 30 '18 at 12:34

0

Now i could able to validate the Network prefix using the below set of code.

var valueToTest=document.getElementById('networkprefix').value;

if ( /^((?:[0-9A-Fa-f]{1,4}))*:((?:[0-9A-Fa-f]{1,4}))*:((?:[0-9A-Fa-f]{1,4}))*:((?:[0-9A-Fa-f]{1,4}))$/g.test(valueToTest)) 
{
    alert("Valid Network Prefix");

}
else
{
    alert("InValid Network Prefix");
}

answered Jul 30 '18 at 12:34

MANOJ

177
5
14

That does not actually validate all valid IPv6 address formats. – Ron Maupin Jul 30 '18 at 14:30

score 0 · Answer 2 · edited Oct 07 '21 at 13:39

The answer you provided is inadequate to properly validate all valid IPv6 address formats for text representation.

If you want to capture any of the valid RFC 4291, IP Version 6 Addressing Architecture formats, then you need a regular expression like:

^(?:(?:(?:[A-F0-9]{1,4}:){5}[A-F0-9]{1,4}|(?:[A-F0-9]{1,4}:){4}:[A-F0-9]{1,4}|(?:[A-F0-9]{1,4}:){3}(?::[A-F0-9]{1,4}){1,2}|(?:[A-F0-9]{1,4}:){2}(?::[A-F0-9]{1,4}){1,3}|[A-F0-9]{1,4}:(?::[A-F0-9]{1,4}){1,4}|(?:[A-F0-9]{1,4}:){1,5}|:(?::[A-F0-9]{1,4}){1,5}|:):(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])\.){3}(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])|(?:[A-F0-9]{1,4}:){7}[A-F0-9]{1,4}|(?:[A-F0-9]{1,4}:){6}:[A-F0-9]{1,4}|(?:[A-F0-9]{1,4}:){5}(?::[A-F0-9]{1,4}){1,2}|(?:[A-F0-9]{1,4}:){4}(?::[A-F0-9]{1,4}){1,3}|(?:[A-F0-9]{1,4}:){3}(?::[A-F0-9]{1,4}){1,4}|(?:[A-F0-9]{1,4}:){2}(?::[A-F0-9]{1,4}){1,5}|[A-F0-9]{1,4}:(?::[A-F0-9]{1,4}){1,6}|(?:[A-F0-9]{1,4}:){1,7}:|:(?::[A-F0-9]{1,4}){1,7}|::)$

How to validate IPV6 network prefix in javascript

2 Answers2