socat with IP6 support?

[Warren Young]

On 1/17/2014 11:58, Aaron Humphrey wrote:
> I had thought that cygwin 1.7 had IPv6 support,

It does, to the extent that the underlying Winsock APIs do.  Basically, 
you want to be on Vista or newer if you're going to depend on IPv6 under 
Cygwin.  IPv6 support for earlier versions of Windows was available only 
in "experimental" form.  (Microsoft's term.)

> Is there an inherent limitation in IPv6 support under Cygwin

Here's the relevant section of the configure output:

checking whether to include IPv6 support... yes
checking for netinet/ip6.h... no
configure: WARNING: include file netinet/ip6.h not found, disabling IP6
checking netinet6/in6.h usability... no
checking netinet6/in6.h presence... no
checking for netinet6/in6.h... no

So, apparently Cygwin needs several header files, or socat needs to be 
tweaked to use the definitions in the files that already exist.

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