Tarun Khanna <[email protected]> wrote:
> On 02/27/2017 05:12 PM, Florian Westphal wrote:
> >Tarun Khanna <[email protected]> wrote:
> >>Is it possible to register for callbacks so that a user application is
> >>updated on a regular basis when the packet or bytes counts change for flows?
> >No, update to packet/byte count doesn't trigger an event (it would
> >trigger too often).
> 
> I was hoping if there was an option to set a timeout, so that an update
> would trigger every 5 seconds for flows where the counters have changed.

No, there is no such feature at the moment.

> I have an application that needs to keep track of per flow stats for all tcp
> flows destined to port 80. The best way I have found so far is to call
> nfct_query regularly and to go through each flow returned to retrieve the
> counters. Would that be the best way to do it?

Its your only option right now.  If you need a periodic update feature
we'll need to think about how to best make this.

We now have a periodic gc worker in conntrack so we could probably do
this without re-adding a per-conntrack timer.
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