netdev - strange TCP behaviour

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Message-Id: <20070508094330.M22276@visp.net.lb>
Date:	Tue, 8 May 2007 12:49:36 +0300
From:	"Denys" <denys@...p.net.lb>
To:	netdev@...r.kernel.org
Subject: strange TCP behaviour

Dear All

I have application, thats accept redirected requests from squid (over iptables
... -j REDIRECT), getting ip over getsockopt/SO_ORIGINAL_DST and throwing data
in to the tunnel.

And i have strange behaviour, when i do
sysctl net.ipv4.tcp_frto=0

And i try any website with attachments (means a lot of data going to be sent
to redirect), i am getting after 3-10 seconds message "Read error: Connection
timed out". Thats a bit strange, possible it is related to application, but i
guess kernel must not give error to recv/read (i dont know what squid is
using). It is a bit difficult to reproduce the problem, but i can give a
remote access to PC where all things installed. But i have no idea, who of
TCP(?) maintainers can help me with this. I think there is no app problem,
tcpdump looks normal, there is no reset(and message will be different in case
of reset).

--
Denys Fedoryshchenko
Technical Manager
Virtual ISP S.A.L.

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