netdev - Re: [PATCH v5 net-next 12/14] tcp: accecn: fallback outgoing half link to non-AccECN

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Message-ID: <35a98a1e-588f-44d0-ab99-f4b4508f65cb@redhat.com>
Date: Thu, 6 Nov 2025 13:18:39 +0100
From: Paolo Abeni <pabeni@...hat.com>
To: chia-yu.chang@...ia-bell-labs.com, edumazet@...gle.com, parav@...dia.com,
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Subject: Re: [PATCH v5 net-next 12/14] tcp: accecn: fallback outgoing half
 link to non-AccECN

On 10/30/25 3:34 PM, chia-yu.chang@...ia-bell-labs.com wrote:
> From: Chia-Yu Chang <chia-yu.chang@...ia-bell-labs.com>
> 
> According to Section 3.2.2.1 of AccECN spec (RFC9768), if the Server
> is in AccECN mode and in SYN-RCVD state, and if it receives a value of
> zero on a pure ACK with SYN=0 and no SACK blocks, for the rest of the
> connection the Server MUST NOT set ECT on outgoing packets and MUST
> NOT respond to AccECN feedback. Nonetheless, as a Data Receiver it
> MUST NOT disable AccECN feedback.
> 
> Signed-off-by: Chia-Yu Chang <chia-yu.chang@...ia-bell-labs.com>

Acked-by: Paolo Abeni <pabeni@...hat.com>