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Re: Temporary IPv6 addresses vs. netgroups

Robert Elz wrote:

    Date:        Tue, 22 Jan 2013 19:43:24 -0500 (EST)
    From:        Mouse <mouse%Rodents-Montreal.ORG@localhost>
    Message-ID:  <201301230043.TAA26137%Sparkle.Rodents-Montreal.ORG@localhost>

  | Unfortunately I think it's the only solution, not only just because we
  | don't have any APIs more sophisicated but because it's not an easy
  | problem.

Not easy to solve every case, that is perhaps, not easy to achieve
perfection, I agree - and the option of binding a particular source
address from the application would always be there.  But for most
applications, a rather simpler API that the application can use would
solve enough of the problem (what typical apps actually need, most of the
time) that it would be useful I think.
I don't think that the API needs to change. For the most part,
the way in which the various networking APIs is sufficient for
what we need to do.

The problem at hand is that the multitude of addresses available
on a host now means that applications need to either make educated
guesses (for example, putting 169.254 at the bottom of the list to
choose) or allow users to manually configure which address they
want to use with a particular application. For large applications,
this isn't unreasonable but for utilities such as mount, well we
need a better way for them to work.

In the original case of using mount, it isn't just one mount call
or socket that needs to use a specific IP address/interface but
a whole host of them. Thus what's required is a way to influence
the networking environment of a command all of its successors.


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