linux-kernel - Re: [PATCH net-next 0/3] net: ipv4/ipv6: new option to accept garp/untracked na only if in-network

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Date:   Mon, 11 Jul 2022 16:42:06 -0700
From:   Jaehee <jhpark1013@...il.com>
To:     netdev@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>, yoshfuji@...ux-ipv6.org,
        dsahern@...nel.org, edumazet@...gle.com,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, shuah@...nel.org,
        linux-kernel@...r.kernel.org, aajith@...sta.com,
        Roopa Prabhu <roopa@...dia.com>,
        Andy Roulin <aroulin@...dia.com>,
        Stefano Brivio <sbrivio@...hat.com>
Subject: Re: [PATCH net-next 0/3] net: ipv4/ipv6: new option to accept
 garp/untracked na only if in-network

On Mon, Jul 11, 2022 at 10:51 AM Jaehee Park <jhpark1013@...il.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