netdev - Re: [PATCH] net: Add default_advmss() methods to blackhole dst

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Date:	Fri, 18 Feb 2011 14:24:03 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Changli Gao <xiaosuo@...il.com>
Cc:	George Spelvin <linux@...izon.com>,
	David Miller <davem@...emloft.net>,
	linux-kernel@...r.kernel.org, netdev <netdev@...r.kernel.org>,
	Roland Dreier <roland@...estorage.com>
Subject: Re: [PATCH] net: Add default_advmss() methods to blackhole dst_ops

Le vendredi 18 février 2011 à 21:16 +0800, Changli Gao a écrit :

> I am wondering why magic number 256 is used here. Is there a special
> reason? Thanks.
> 

It really doesnt matter. SYN message will be dropped anyway.

256 happens to be the default value
of /proc/sys/net/ipv4/route/min_adv_mss



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