IPv6 address validation and canonicalization [closed]

Answer 1

I wrote javascript-ipv6 for this very purpose. It currently powers v6decode.com.

Here's a short example of the API:

var address = new v6.Address("::ffff:7b2d:4359/64");

if (address.isValid()) {
   // Do something if the address is valid
}

console.log(address.correctForm());         // "::ffff:7b2d:4359"
console.log(address.canonicalForm());       // "0000:0000:0000:0000:0000:ffff:7b2d:4359"
console.log(address.v4Form());              // "::ffff:123.45.67.89"
console.log(address.subnetMask);            // "64"
console.log(address.possibleAddresses(96)); // "4,294,967,296"