From owner-soc-status@FreeBSD.ORG Mon Jun 27 16:56:23 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 42C5B106564A for ; Mon, 27 Jun 2011 16:56:23 +0000 (UTC) (envelope-from nc3bhconc@gmail.com) Received: from mail-qy0-f175.google.com (mail-qy0-f175.google.com [209.85.216.175]) by mx1.freebsd.org (Postfix) with ESMTP id 082448FC08 for ; Mon, 27 Jun 2011 16:56:22 +0000 (UTC) Received: by qyk30 with SMTP id 30so1656673qyk.13 for ; Mon, 27 Jun 2011 09:56:22 -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=Uqc7IYX8si7EdUK8V/GlC5UgfLxoMM//LqBmmF0WCpc=; b=usqVQAbDcIwHVXGuk55OUfkpOgIj2LeS4bE07DczSQSGmKJQ2U0wA+Ree2wqfRw+xB 1luefwjOJzJLh97OMeFwyy361JPYSu+h+4+W+SEpPuaHBtWz54U0JIYMi9JlgTaO3pWq kaVlAxtOYVDPVrV2ph6WFPrYcIukxQ+D8/3cU= Received: by 10.224.45.80 with SMTP id d16mr5124194qaf.112.1309193782113; Mon, 27 Jun 2011 09:56:22 -0700 (PDT) MIME-Version: 1.0 Sender: nc3bhconc@gmail.com Received: by 10.224.45.143 with HTTP; Mon, 27 Jun 2011 09:56:02 -0700 (PDT) From: Catalin Nicutar Date: Mon, 27 Jun 2011 19:56:02 +0300 X-Google-Sender-Auth: 2yGftdEKGW0m1q6dAbkiWIAQykc Message-ID: To: soc-status@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 Subject: TCP UTO - Weekly Report 5 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: Mon, 27 Jun 2011 16:56:23 -0000 Hello! This is the fifth 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 * The options weren't correctly inherited from a listening socket * When using UTO, no keepalives are sent (RFC 5482 4.2) * The connection was dropped whenever TCP_MAXRXTSHIFT retransmits had been performed. Now (if using UTO) it is reset if the USER_TIMEOUT is exceeded. * My goals for for this week * Consider the implications of changing the retransmit timer and stopping the keepalive timer (RFC 5482 only specified that a timeout > USER_TIMEOUT must be chosen) * Consider performing retransmits beyond TCP_MAXRXTSHIFT when in UTO * When waiting in UTO, ICMP destination unreachable messages must be ignored If you have questions, suggestions or advices drop me an email to cnicutar@FreeBSD.org.