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Date:	Wed, 20 Feb 2008 11:24:50 +0100 (CET)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Patrick McHardy <kaber@...sh.net>
cc:	David Woodhouse <dwmw2@...radead.org>, netdev@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>, varekova@...hat.com
Subject: Re: [NETFILTER]: Introduce nf_inet_address


On Feb 19 2008 15:45, Patrick McHardy wrote:
>> 
>> It's in busybox 1.9.1. Just including <netinet/in.h> seems to be
>> sufficient to make it happy again. I wonder if netfilter.h should
>> include that for itself?
>
> That would break iptables compilation, which already includes
> linux/in.h in some files. I guess the best fix for now is to
> include netinet/in.h in busybox and long-term clean this up
> properly.
>

If <linux/netfilter.h> includes <linux/in.h>, userspace compilation
fails (clashing defs, etc.); if <linux/netfilter.h> includes
<netinet/in.h>, kernel compilation fails (file not found).

What comes to mind is the ugly hack we had for a few days:

#ifdef __KERNEL__
#	include <linux/in.h>
#else
#	include <netinet/in.h>
#endif

and I think we should not impose any inclusion rules on userspace
this way.

Right now, it is solved this way:

kernel .c files explicitly include <linux/in.h> when loading
<linux/netfilter.h>,

userspace .c files explicitly includ <netinet/in.h> when loading
<linux/netfilter.h>. And that seems to work out.

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