Jason Gunthorpe wrote:
> At least the XEN net front driver always produces non linear skbs,
> so the SIP module does nothing at all when used with that NIC.
> 
> Unconditionally linearize the skb..
> 
> Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
> ---
>  net/netfilter/nf_conntrack_sip.c |    9 +++------
>  1 files changed, 3 insertions(+), 6 deletions(-)
> 
> Patrick/Jan, thanks.. This is what I wanted to do in the first place,
> but I couldn't convince myself it was safe, as no other nf code does
> this..

Your patch is based on an old version, the current version also
supports TCP. I'll commit this patch to my tree after some testing.