From: Bruce Cran <bruce@cran.org.uk>
To: netdev@vger.kernel.org
Subject: connect() sometimes succeeds when it shouldn't
Date: Thu, 18 Feb 2010 19:47:10 +0000 [thread overview]
Message-ID: <201002181947.11125.bruce@cran.org.uk> (raw)
Hi
I've found that if I run a program that does lots of calls to connect() then
it will eventually succeed when there's no server listening. For SCTP it takes
a few thousand, for TCP up to a couple of million. I first came across the
problem in Windows, where the connection was being processed so quickly that
by the time the handler function had finished, the 'connecting' flag had
already been reset, which wasn't expected. I've not checked the Linux sources
to see if something similar is happening though.
The machine I tested it on was running a 2.6.32 i686 kernel.
The test code can be found at
http://www.cran.org.uk/~brucec/linux/badconnect.c
--
Bruce Cran
next reply other threads:[~2010-02-18 19:56 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-18 19:47 Bruce Cran [this message]
2010-02-18 23:09 ` connect() sometimes succeeds when it shouldn't Ilpo Järvinen
2010-02-19 10:55 ` Bruce Cran
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