Re: [PATCH 0/1] Conntrack event generation control, kernel part

[Pablo Neira Ayuso <pablo@netfilter.org>]

Pablo Neira Ayuso wrote:
> Hi Jozsef,
> 
> Pablo Neira Ayuso wrote:
>> I see, but something similar to nfnetlink_queue/NFQUEUE (per-process)
>> together with an extended version of the `conntrack match' for events
>> would be more flexible
> 
> Another very simple choice can be to add more multicast groups according 
> to the sort of events. We can get more fine grain event selection while 
> keeping it per-process. Currently, there's only three sort of events: 
> NEW, UPDATE and DESTROY. We can add more netlink multicast groups to 
> allow user-space to select what kind of events they are interested.

netlink doesn't seem to support overlapping event groups, and UPDATE and 
ASSURED groups would overlap. Thus, we'll need to call 
netlink_broadcast() twice. I still don't find a non-intrusive way to do 
some non-BPF-based filtering :(

-- 
"Los honestos son inadaptados sociales" -- Les Luthiers