netdev - Re: [PATCH v2 net-next 2/4] selftests: fcnal: Test SO

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Message-ID: <75f3cba0-4f4b-15ca-5cda-537fecd6b55b@kernel.org>
Date: Thu, 11 May 2023 09:02:22 -0600
From: David Ahern <dsahern@...nel.org>
To: Guillaume Nault <gnault@...hat.com>, David Miller <davem@...emloft.net>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Eric Dumazet <edumazet@...gle.com>
Cc: netdev@...r.kernel.org
Subject: Re: [PATCH v2 net-next 2/4] selftests: fcnal: Test SO_DONTROUTE on
 TCP sockets.

On 5/11/23 8:39 AM, Guillaume Nault wrote:
> Use nettest --{client,server}-dontroute to test the kernel behaviour
> with TCP sockets having the SO_DONTROUTE option. Sending packets to a
> neighbour (on link) host, should work. When the host is behind a
> router, sending should fail.
> 
> Client and server sockets are tested independently, so that we can
> cover different TCP kernel paths.
> 
> SO_DONTROUTE also affects the syncookies path. So ipv4_tcp_dontroute()
> is made to work with or without syncookies, to cover both paths.
> 
> Signed-off-by: Guillaume Nault <gnault@...hat.com>
> ---
>  v2: Use 'nettest -B' instead of invoking two nettest instances for
>      client and server.
> 
>  tools/testing/selftests/net/fcnal-test.sh | 56 +++++++++++++++++++++++
>  1 file changed, 56 insertions(+)
> 

Reviewed-by: David Ahern <dsahern@...nel.org>