Let's improve IPv6 support

[Paul Marks]

On Fri, Mar 17, 2017 at 11:47 AM, Martin Buchholz <martinrb at google.com> wrote:
> Google cares a lot about IPv6, and not only because Vint Cerf works at
> Google.
>
> We have some local modifications and some networking expertise and intend to
> port/contribute that to openjdk10.
>
> Most of this is the work of my colleagues Alexander Smundak and Paul Marks.
>
> We hope we can do most of this work without asking too much of other net-dev
> engineers, but we will likely need help with porting to non-Linux platforms,
> running JPRT, and perhaps CCC/JEP process.
>
> We expect to make a large number of commits.  Should there be a JEP to cover
> this?  Is there a current net-dev engineer who feels they "own" this problem
> (Chris?)?

I should point out that the current batch of changes are focused on
support for systems where 127.0.0.1 doesn't exist, which is relatively
straightforward and unexciting.

However, I'm also aware of three "hard problems" that would require
new features, and significant changes to current behavior:
- Address selection: https://bugs.openjdk.java.net/browse/JDK-8170568
- Default IP address formatting ("0:0:0:0:0:0:0:1" vs. RFC 5952)
- Parsing and formatting of host:port strings, e.g. "[::1]:80"