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Date:	Fri, 17 Jan 2014 15:39:18 -0700
Message-ID:	<CAF+jOM3YUtgtae5L=kTmaChYRGQYrp6yGg9H8CbFQ3GguW5-0Q@mail.gmail.com>
Subject:	Re: socat with IP6 support?
From:	Aaron Humphrey <alfvaen AT gmail DOT com>
To:	cygwin AT cygwin DOT com
X-IsSubscribed:	yes

On Fri, Jan 17, 2014 at 3:19 PM, Corinna Vinschen wrote:
> Our ipv6 stuff is in cygwin/in6.h, which is included by cygwin/in.h,
> which in turn is included by netinet/in.h.

Ah, that explains it.

> We could fetch FreeBSDs netinet/ip6.h.  In contrast to Glibc's
> netinet/ip6.h it does not include netinet/in.h but we could add
> that.
>
> Aaron, if you copy this file:
>
> http://svnweb.freebsd.org/base/stable/10/sys/netinet/ip6.h?revision=256281&view=co
>
> into /usr/include/netinet, and perhaps add this patch:
>
> Index: netinet/ip6.h
> ===================================================================
> RCS file: /home/ncvs/src/sys/netinet/ip6.h,v
> retrieving revision 1.22
> diff -u -p -r1.22 ip6.h
> --- netinet/ip6.h       10 Apr 2013 00:26:22 -0000      1.22
> +++ netinet/ip6.h       17 Jan 2014 22:18:50 -0000
> @@ -64,6 +64,9 @@
>  #ifndef _NETINET_IP6_H_
>  #define _NETINET_IP6_H_
>
> +#include <inttypes.h>
> +#include <netinet/in.h>
> +
>  /*
>   * Definition for internet protocol version 6.
>   * RFC 2460
>
> can you build socat with IPv6 support out of the box and it actually
> works?

It did build and work just fine with the FreeBSD ip6.h file, with and
without the patch, but as I said, for all that socat uses the actual
ip6.h library, I could have put in a file empty except for the #define
and it would probably have worked just as well.  Other programs may,
of course, be slightly pickier.

Thank you all for your help in getting socat up and working with IPv6.

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