Re: IPv6 Netowrk Device Numbering BP

[Owen DeLong <owen () delong com>]

On Nov 1, 2012, at 10:43 , Chip Marshall <chip () 2bithacker net> wrote:

> On 01-Nov-2012, Owen DeLong <owen () delong com> sent:
> > The only exceptions to this parsing would be if someone handed
> > you a textual representation of an IPv4 mapped address
> > (::ffff:192.0.2.50), which essentially represents the partial
> > decimal format Masataka is requesting.
>
> I might be missing something here, but isn't that format already
> valid for any IPv6 address, not just the special v4-in-v6
> representation?
>
> > > > import socket
> > > > p = '2001:abcd::192.16.10.10'
> > > > n = socket.inet_pton(socket.AF_INET6, p)
> > > > socket.inet_ntop(socket.AF_INET6, n)
> '2001:abcd::c010:a0a'
>
> Or is the issue just the ntop part not giving you back the
> decimalized string?

That's not a problem and I certainly wouldn't expect it to do so.

I guess the silly notation is more widely supported than I thought, but, IMHO, it's a kind of poor choice of syntax 
outside of the limited use of displaying IPv4-mapped addresses for dual-stack socket connections displaying IPv4 
connections in IPv6 format.

Owen