netdev - Disable tcp MSS option in three way handshake?

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Message-ID: <CAK3+h2xKHBNXzY0WNwPV+oGbY00UVfJpO-qjFW2cxCpmdt+hAg@mail.gmail.com>
Date:	Thu, 25 Oct 2012 15:27:54 -0700
From:	Vincent Li <vincent.mc.li@...il.com>
To:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Disable tcp MSS option in three way handshake?

Hi,

this sounds crazy, we have a weird situation that an unknown tcp
implementation not putting tcp MSS option in the SYN/ACK which caused
us some issue. I am tasked to mimic the unknown tcp immplementation on
not sending MSS in tcp SYN/ACK, I am wondering if I can achieve that
by modifying linux kernel tcp code,  there is socket option
TCP_MAXSEG, but that seems only affecting the size of MSS, not
removing the MSS option. do you have any pointer on how to do that in
kernel tcp code?

Thanks

Vincent
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