Date: Thu, 24 Sep 2009 11:50:33 +0100 From: Rui Paulo <rpaulo@freebsd.org> To: Fang Wang <wangfangcs@gmail.com> Cc: freebsd-net@freebsd.org Subject: Re: TCP UTO (RFC 5482) patch calls for review Message-ID: <769AA1C9-5D58-453E-AC6B-A6B016C718EF@freebsd.org> In-Reply-To: <abd04180909011034p1e2fc211v126fff410fa032e5@mail.gmail.com> References: <abd04180909011034p1e2fc211v126fff410fa032e5@mail.gmail.com>
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On 1 Sep 2009, at 18:34, Fang Wang wrote: > Hi, > > The attached patch implements TCP User Timeout Option(RFC 5482 [0]) in > freebsd tcp stack. And this patch comes from my GSoC 2009 project -- > Implement TCP UTO(mentor, Rui Paulo). I will be very grateful to any > tips, suggestions and questions. > > Brief introduction about TCP UTO: > The TCP user timeout controls how long transmitted data may remain > unacknowledged before a connection is forcefully closed. It is a > local, per-connection parameter. TCP User Timeout Option allows one > end of a TCP connection to advertise it's current user timeout value. > This information provides advice to the other end of the TCP > connection to adapt it's user timeout accordingly. Increasing the user > timeouts on both ends of a TCP connection allows it to survive > extended periods without end-to-end connectivity. Decreasing the user > timeouts allows busy servers to explicitly notify their clients that > they will maintain the connection state only for a short time without > connectivity. I'm planning to commit this patch this week/weekend. Regards, -- Rui Paulo
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