Re: [mpls-linux-devel] iptables Couldn't load target `mpls'

[Julien B. <jul...@gm...>]

Hi James,

I think I figure out what was wrong with the iptables MPLS module.
Here is the change I made in net/ipv4/netfilter/ipt_mpls.c

">" = BEFORE
"<" = AFTER
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
84,85c84,85
< //    if (ipt_register_target(&ipt_mpls_reg))
< //            return -EINVAL;
---
>       if (ipt_register_target(&ipt_mpls_reg))
>               return -EINVAL;
87c87
<       return ipt_register_target(&ipt_mpls_reg);
---
>       return 0;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

I also notice that the last version of iptables doesn't contain the new
patch in order to be compatible
to the newest version of the kernel (2.6.19.3). So here is the change that
need to be made :

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Index: include/iptables_common.h
===================================================================
--- include/iptables_common.h   (Revision 6660)
+++ include/iptables_common.h   (Arbeitskopie)
@@ -42,4 +42,9 @@
   extern void init_extensions(void);
#endif

+#define __be32 u_int32_t
+#define __le32 u_int32_t
+#define __be16 u_int16_t
+#define __le16 u_int16_t
+
#endif /*_IPTABLES_COMMON_H*/
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

And the last problem I had with iptables-mpls is with the file
iptables-mpls/extensions/libip6t_mpls.c:
Replace this line : void _init(void)
with this one : void __attribute((constructor)) my_init(void)
then you will have :
void __attribute((constructor)) my_init(void)
{
    register_target6(&mpls);
}

This fix the compiling problem I had.

I hope this can help you. Please tell me if something goes wrong with my
changes. So far, everything seems to work!!

Regards,


Julien


On 3/16/07, James R. Leu <jl...@mi...> wrote:
>
> I think the ipt_mpls module is broken.  I'm working on a fix.
> When I figure it out. I'll post a new kernel.
>
> On Wed, Mar 14, 2007 at 01:50:27PM +0100, Julien Bisconti wrote:
> > Hi James,
> >
> >
> > You updated the repository according to my previous email. Now iptables
> > compiles like a charm :-)
> > But I still have the problem of the usability.
> >
> > Simple example:
> >
> > LSR1:~# iptables -A OUTPUT -d 128.104.17.130/32 -j mpls --nhlfe 0x2
> > iptables v1.3.5: Couldn't load target `mpls'
> >
> > Try `iptables -h' or 'iptables --help' for more information.
> > LSR1:~# lsmod
> > Module                  Size  Used by
> > ipt_mpls                2816  0
> > ip6t_mpls               2688  0
> > x_tables               15876  2 ipt_mpls,ip6t_mpls
> > mpls_tunnel             9092  0
> > ebt_mpls                3328  0
> > ebtables               20096  1 ebt_mpls
> > mplsbr                  3840  0
> > mpls6                   4224  0
> > ipv6                  260768  11 mpls6
> > mpls4                   6528  0
> > mpls                   83244  7
> > ipt_mpls,ip6t_mpls,mpls_tunnel,ebt_mpls,mplsbr,mpls6,mpls4
> >
> >
> > Could you help make this work? Because the module is loaded and iptables
> > doesn't seem to find it.
> >
> > Thank you for your help.
> >
> >
> > Julien
> >
> >
> > --
> > --------------------------------------------
> > Julien BISCONTI <julien.bisconti(at)student.fundp.ac.be>
> > M.Sc. student in Computer Science, University of Namur
> > FUNDP, Belgium
>
> >
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>
> --
> James R. Leu
> jl...@mi...
>
>


-- 
--------------------------------------------
Julien BISCONTI <julien.bisconti(at)student.fundp.ac.be>
M.Sc. student in Computer Science, University of Namur
FUNDP, Belgium