From owner-soc-status@FreeBSD.ORG Wed Aug 10 07:06:41 2011 Return-Path: Delivered-To: soc-status@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 3A7881065673 for ; Wed, 10 Aug 2011 07:06:41 +0000 (UTC) (envelope-from nc3bhconc@gmail.com) Received: from mail-qw0-f54.google.com (mail-qw0-f54.google.com [209.85.216.54]) by mx1.freebsd.org (Postfix) with ESMTP id EF8FF8FC0C for ; Wed, 10 Aug 2011 07:06:40 +0000 (UTC) Received: by qwc9 with SMTP id 9so511299qwc.13 for ; Wed, 10 Aug 2011 00:06:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:from:date:x-google-sender-auth:message-id :subject:to:content-type; bh=oPJAUlldc3E5U9/tODRSOvNlY09tI8IFNyGwycZ4jFs=; b=put3hFeyWtHra4qtHm0WbDW0zqHNCrtnalO+WYucdh6mqgpjL/CJj6qzVopursp3RU KW4VO8VgKM9Hckf1mvr3HoSs6HTLWtUogAnGa/bK254MMtC4fr0NWyqbOXAw8932iAlm 9RcxqOP9C6eygE2DsUPgxtH0hHAvDRT7+voY8= Received: by 10.224.205.3 with SMTP id fo3mr6119590qab.39.1312960000237; Wed, 10 Aug 2011 00:06:40 -0700 (PDT) MIME-Version: 1.0 Sender: nc3bhconc@gmail.com Received: by 10.224.67.194 with HTTP; Wed, 10 Aug 2011 00:06:20 -0700 (PDT) From: Catalin Nicutar Date: Wed, 10 Aug 2011 10:06:20 +0300 X-Google-Sender-Auth: xTRDjmkq21Sql_TNCkB53jEGOrM Message-ID: To: soc-status@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 Subject: TCP UTO - Weekly Report 10 X-BeenThere: soc-status@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Summer of Code Status Reports and Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Aug 2011 07:06:41 -0000 Hello! This is the tenth report for TCP UTO. * Short TCP UTO description UTO stands for User Timeout Option (it is described in RFC5482). TCP UTO specifies a peer should be allowed to advertise its chosen `User Timeout' for a connection. The wiki page for this project: http://wiki.freebsd.org/CatalinNicutar/TCPUTO * Work completed last week * I have forward-ported to HEAD both kernel changes and telnet, openssh and netcat * I have added UTO support to varnishd 3.0.0. The option is sent when the sess_timeout parameter is used * I have made a small change to the way the received timeout is handled by passive sockets * I have developed a scenario in which a careless server ties the resources of a machine to the point that no other process can use sockets any more, and pinpointed the exact cause * My goals for this week * I will try to periodically drop misbehaving connections such that the scenario above is impossible * I will change the handling of the TCP_RCVUTO_TIMEOUT socket option to allow a process to specify a per-connection limit If you have questions, suggestions or advices drop me an email to cnicutar@FreeBSD.org. Catalin Nicutar