ipaddr-py: New IPv4/IPv6 parsers and tests, ported from Guava

This patch contains a Python implementation of the IP parsing algorithms
that I wrote for Guava.  It validates and parses the address in one step,
so a separate _is_valid_ip() function is no longer needed.

Also:
- Process ints instead of strings for ipv4_mapped, teredo, and sixtofour.
- Make teredo() check for 2001::/32 instead of 2001::/16.

The original Guava code (also open sourced by Google) is here:
http://code.google.com/p/guava-libraries/source/browse/guava/src/com/google/common/net/InetAddresses.java

[Peter Moody, 2011-08-19 16:34:34]

I'll check this out today. thanks.

On Thu, Aug 18, 2011 at 9:22 PM, <pmarks@google.com> wrote:

> Reviewers: Peter Moody,
>
> Description:
> This patch contains a Python implementation of the IP parsing algorithms
> that I wrote for Guava.  It validates and parses the address in one
> step,
> so a separate _is_valid_ip() function is no longer needed.
>
> Also:
> - Process ints instead of strings for ipv4_mapped, teredo, and
> sixtofour.
> - Make teredo() check for 2001::/32 instead of 2001::/16.
>
> The original Guava code (also open sourced by Google) is here:
> http://code.google.com/p/**guava-libraries/source/browse/**
>
guava/src/com/google/common/**net/InetAddresses.java<http://code.google.com/p/guava-libraries/source/browse/guava/src/com/google/common/net/InetAddresses.java>
>
>
> Please review this at
http://codereview.appspot.com/**4917042/<http://codereview.appspot.com/4917042/>
>
> Affected files:
>  M     ipaddr.py
>  M     ipaddr_test.py
>
>
>


-- 
Peter Moody      Google    1.650.253.7306
Security Engineer  pgp:0xC3410038

[ek, 2011-08-21 10:41:09]

lgtm, fwiw

[Peter Moody, 2011-08-22 17:31:18]

lgtm.

This looks cleaner and is a bit quicker by my tests too.

I'll apply this.