# Re: \[PATCH bpf-next 07/10\] bpf: Add helpers to query conntrack info

- From: Kumar Kartikeya Dwivedi \<memxor@gmail.com\>
- Date: 2021-10-20 19:17:07 
- List: netdev
- Page: https://ratatoskr.run/netdev/2021/10/7782694
- Thread: https://ratatoskr.run/netdev/2021/10/7782602/t.md

```text
On Wed, Oct 20, 2021 at 06:48:25PM IST, Maxim Mikityanskiy wrote:
> On 2021-10-20 06:56, Kumar Kartikeya Dwivedi wrote:
> > On Tue, Oct 19, 2021 at 08:16:52PM IST, Maxim Mikityanskiy wrote:
> > > The new helpers (bpf_ct_lookup_tcp and bpf_ct_lookup_udp) allow to query
> > > connection tracking information of TCP and UDP connections based on
> > > source and destination IP address and port. The helper returns a pointer
> > > to struct nf_conn (if the conntrack entry was found), which needs to be
> > > released with bpf_ct_release.
> > >
> > > Signed-off-by: Maxim Mikityanskiy <redacted>
> > > Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
> >
> > The last discussion on this [0] suggested that stable BPF helpers for conntrack
> > were not desired, hence the recent series [1] to extend kfunc support to modules
> > and base the conntrack work on top of it, which I'm working on now (supporting
> > both CT lookup and insert).
>
> If you have conntrack lookup, I can base my solution on top of yours. As it
> supports modules, it's even better. What is the current status of your work?
> When do you plan to submit a series? Please add me to Cc when you do.
>

Great, I'll post the lookup stuff separately next week, and Cc you.

Thanks!

> Thanks for reviewing!
>
> > [0]: https://lore.kernel.org/bpf/CAADnVQJTJzxzig=1vvAUMXELUoOwm2vXq0ahP4mfhBWGsCm9QA@mail.gmail.com
> > [1]: https://lore.kernel.org/bpf/CAADnVQKDPG+U-NwoAeNSU5Ef9ZYhhGcgL4wBkFoP-E9h8-XZhw@mail.gmail.com
> >
> > --
> > Kartikeya
> >
>

--
Kartikeya
```