ipq problem on PPC 64 bits arch

ipq problem on PPC 64 bits arch

[Eric Leblond]

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.

BR,
-- 
Éric Leblond, eleblond@inl.fr
Téléphone : 01 44 89 46 40, Fax : 01 44 89 45 01
INL, http://www.inl.fr

Re: ipq problem on PPC 64 bits arch

[Patrick McHardy]

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.