On Mon, Jul 11, 2022 at 10:51 AM Jaehee Park <jhpark1013@gmail.com> wrote:
>
> The first patch adds an option to learn a neighbor from garp only if
> the src ip is in the same subnet of addresses configured on the
> interface. The option has been added to arp_accept in ipv4.
>
> The same feature has been added to ndisc (patch 2). For ipv6, the
> subnet filtering knob is an extension of the accept_untracked_na
> option introduced in these patches:
> https://lore.kernel.org/all/642672cb-8b11-c78f-8975-f287ece9e89e@gmail.com/t/
> https://lore.kernel.org/netdev/20220530101414.65439-1-aajith@arista.com/T/
>
> The third patch contains selftests for testing the different options
> for accepting arp and neighbor advertisements.
>
> Jaehee Park (3):
> net: ipv4: new arp_accept option to accept garp only if in-network
> net: ipv6: new accept_untracked_na option to accept na only if
> in-network
> selftests: net: arp_ndisc_untracked_subnets: test for arp_accept and
> accept_untracked_na
>
> Documentation/networking/ip-sysctl.rst | 48 +--
> include/linux/inetdevice.h | 2 +-
> net/ipv4/arp.c | 24 +-
> net/ipv6/addrconf.c | 2 +-
> net/ipv6/ndisc.c | 29 +-
> tools/testing/selftests/net/Makefile | 1 +
> .../net/arp_ndisc_untracked_subnets.sh | 281 ++++++++++++++++++
> 7 files changed, 360 insertions(+), 27 deletions(-)
> create mode 100755 tools/testing/selftests/net/arp_ndisc_untracked_subnets.sh
>
> --
> 2.30.2
>
I forgot a few cleanups. I will post a v2 soon.
Sorry about that!
Thanks,
Jaehee