Hi,

Sorry for the bad timing. Here attached the take#2 of the
nf_conntrack_netlink port. It includes a layer-3 abstraction as
suggested. Attached two patches:

- required modifications for nf_conntrack (modifs-take2.patch)
- a diff against ip_conntrack_netlink to make easy the review (x).

The whole nf_conntrack_netlink file is available at:

http://people.netfilter.org/pablo/nf_conntrack_netlink.c

Cheers.

-- 
Pablo