Hi,
On Fri, Feb 19, 2010 at 12:50:10PM -0500, Stefan Monnier wrote:
> >> I'm fine with whichever path you choose. But just bear in mind, some
> >> systems might not have IPv6 support - which breaks portability ...
> > On the unixish side, there is no system which has tun/tap today but
> > does not have IPv6.
>
> What about embedded systems using uclibc compiled "without ipv6 support"?
I have not yet encountered any such system. That doesn't mean they don't
exist, it's just "I have not yet seen them".
My OpenWRT does IPv6, and that's the smallest system I have.
> Or is that some different kind of "support" that wouldn't affect your code?
I have to investigate.
I'd assume that the necessary header files (that provide necessary compile-
time things like "struct in6_addr") are still complete, and that only the
run-time which is installed on the device itself will be reduced.
If the net effect of the change is "function calls like inet_ntop() are
there but refuse to handle AF_INET6 things (with an error message)", it
won't break OpenVPN - the IPv6 stuff will not work, but it will not break
the IPv4 stuff.
If the net effect is "dynamic linking fails because inet_ntop() or
getaddrinfo() are not even available in the library", this would be very
bad - but it would be surprising, since developers have been told to
use the address-family independent functions (like getaddrinfo()) for
10 years now, so this would break more applications.
gert
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