netdev - Re: [PATCH net-next] tcp: refine SYN handling in tcp_validate

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Message-Id: <20120718.093244.874089024352388424.davem@davemloft.net>
Date:	Wed, 18 Jul 2012 09:32:44 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	subramanian.vijay@...il.com, netdev@...r.kernel.org,
	kkiran@...adcom.com
Subject: Re: [PATCH net-next] tcp: refine SYN handling in
 tcp_validate_incoming

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Wed, 18 Jul 2012 00:29:30 +0200

> From: Eric Dumazet <edumazet@...gle.com>
> 
> Followup of commit 0c24604b68fc (tcp: implement RFC 5961 4.2)
> 
> As reported by Vijay Subramanian, we should send a challenge ACK
> instead of a dup ack if a SYN flag is set on a packet received out of
> window.
> 
> This permits the ratelimiting to work as intended, and to increase
> correct SNMP counters.
> 
> Suggested-by: Vijay Subramanian <subramanian.vijay@...il.com>
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Acked-by: Vijay Subramanian <subramanian.vijay@...il.com>

Applied.
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