From mboxrd@z Thu Jan  1 00:00:00 1970
From: Patrick McHardy <kaber@trash.net>
Subject: Re: ipq problem on PPC 64 bits arch
Date: Tue, 13 Sep 2005 16:37:16 +0200
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To: Eric Leblond <eric@inl.fr>
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Eric Leblond wrote:
> Hi,
> 
> We were not able to have libipq working on a PPC 64 (openpower from IBM)
> running RHEL4 :
> 	linux HOST 2.6.9-5.EL #1 SMP DATE ppc64 ppc64 ppc64
> iptables has been compiled from latest source (1.3.3).
> 
> Application (nufw) is able to get the message (an IPV4 queued packet)
> but when it try get the version contained in the payload if failed :
> 	((struct iphdr*) msg->payload)->version
> returns 0.
> 
> We try to set
> 	CFLAGS+=-DIPT_MIN_ALIGN=8 -DKERNEL_64_USERSPACE_32
> which was not set by Makefile. But there were no result.

Known problem, the struct is layouted in a way that makes it fail in
mixed 32/64 bit environments. nfnetlink_queue doesn't have this problem.