In some email I received from Jason R Thorpe, sie wrote:
> On Wed, Nov 08, 2000 at 11:32:04PM +1100, Darren Reed wrote:
> 
>  > Hmm, I'd rather see this patch bump the kernel revision and add the
>  > bits you put in the wrapper inside of fr_check with the appropriate
>  > #ifdef's.  Your patch also would appear to be ignorant of IPv6 at
>  > present...
> 
> Yes, I would do that.  I omitted that from the patch.  I suppose I should
> also present my other change (to pfil_hooks itself) and commit it at the
> same time -- only one kernel bump.
> 
> Re. IPv6 -- I checked -- it didn't appear that anything got swapped for
> the IPv6 case.  Did I miss something?

You changed the hook in the pfil setup for both IPv4 and IPv6 to the
wrapper, and then swap bytes for ip_len and ip_off without checking
that it is IPv4.

Darren