IPv6 validation

[Stephane Bortzmeyer]

On Wed, Jun 16, 2010 at 02:18:21PM +0530,
 rams <bramesh80 at gmail.com> wrote 
 a message of 86 lines which said:

> Is there any tool available for IPv6 addresses correct or not.
> 
> The following IPv6 addresses is valid or not?

Define "correct" and "valid". Karl Auer proposed a definition (valid
== pingable) which is as good (or as bad) as any other.

> Could you please help me on this.

And what is the relationship to the name server software BIND?

But, if it is homework (it really looks like you are indeed a lazy
student), your teacher certainly explained to you inet_pton()...