From mboxrd@z Thu Jan  1 00:00:00 1970
From: Patrick McHardy <kaber@trash.net>
Subject: Re: [NETFILTER]: Account for IPv4 options in xt_TCPMSS
Date: Tue, 01 Apr 2008 14:55:32 +0200
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References: <alpine.LNX.1.10.0803291652171.28605@fbirervta.pbzchgretzou.qr>
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Cc: davem@davemloft.net,
	Netfilter Developer Mailing List
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To: Jan Engelhardt <jengelh@computergmbh.de>
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Jan Engelhardt wrote:
> 
> I am not exactly sure why 'minlen' only needed to be 40 bytes
> sizeof(iph)+tcphdr; does not the IP header must fit entirely
> into the MTU?


No, the sender is responsible for taking option sizes into
account.