From: David Miller <davem@davemloft.net>
To: eric.dumazet@gmail.com
Cc: netdev@vger.kernel.org, ncardwell@google.com, ycheng@google.com,
hkchu@google.com
Subject: Re: [PATCH net-next] tcp: RFC 5961 5.2 Blind Data Injection Attack Mitigation
Date: Mon, 22 Oct 2012 15:11:31 -0400 (EDT) [thread overview]
Message-ID: <20121022.151131.792891680432322007.davem@davemloft.net> (raw)
In-Reply-To: <1350885431.8609.250.camel@edumazet-glaptop>
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Mon, 22 Oct 2012 07:57:11 +0200
> From: Eric Dumazet <edumazet@google.com>
>
> RFC 5961 5.2 [Blind Data Injection Attack].[Mitigation]
>
> All TCP stacks MAY implement the following mitigation. TCP stacks
> that implement this mitigation MUST add an additional input check to
> any incoming segment. The ACK value is considered acceptable only if
> it is in the range of ((SND.UNA - MAX.SND.WND) <= SEG.ACK <=
> SND.NXT). All incoming segments whose ACK value doesn't satisfy the
> above condition MUST be discarded and an ACK sent back.
>
> Move tcp_send_challenge_ack() before tcp_ack() to avoid a forward
> declaration.
>
> Signed-off-by: Eric Dumazet <edumazet@google.com>
Applied.
prev parent reply other threads:[~2012-10-22 19:11 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-22 5:57 [PATCH net-next] tcp: RFC 5961 5.2 Blind Data Injection Attack Mitigation Eric Dumazet
2012-10-22 19:11 ` David Miller [this message]
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