netdev - Re: [PATCH RFC v2 00/12] socket sendmsg MSG

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Date:   Tue, 28 Feb 2017 16:37:57 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Tom Herbert <tom@...bertland.com>
Cc:     Andy Lutomirski <luto@...capital.net>,
        Willem de Bruijn <willemdebruijn.kernel@...il.com>,
        Michael Kerrisk <mtk.manpages@...il.com>,
        netdev <netdev@...r.kernel.org>,
        Willem de Bruijn <willemb@...gle.com>,
        Linux API <linux-api@...r.kernel.org>
Subject: Re: [PATCH RFC v2 00/12] socket sendmsg MSG_ZEROCOPY

On Tue, 2017-02-28 at 16:28 -0800, Tom Herbert wrote:

> The Mellanox team working on TLS offload pointed out to us that if
> data is changed for a retransmit then it becomes trivial for someone
> snooping to break the encryption. Sounds pretty scary and it would be
> a shame if we couldn't use zero-copy in that use case :-( Hopefully we
> can find a solution...

Right, this is why offloading encryption over TCP is also hard ;)