From owner-freebsd-hackers@FreeBSD.ORG Fri Mar 19 14:37:11 2010 Return-Path: Delivered-To: FreeBSD-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 776FF106566B for ; Fri, 19 Mar 2010 14:37:11 +0000 (UTC) (envelope-from Hartmut.Brandt@dlr.de) Received: from smtp1.dlr.de (smtp1.dlr.de [129.247.252.32]) by mx1.freebsd.org (Postfix) with ESMTP id 0DBD38FC0C for ; Fri, 19 Mar 2010 14:37:10 +0000 (UTC) Received: from beagle.kn.op.dlr.de ([129.247.178.136]) by smtp1.dlr.de over TLS secured channel with Microsoft SMTPSVC(6.0.3790.3959); Fri, 19 Mar 2010 15:25:05 +0100 Date: Fri, 19 Mar 2010 15:25:25 +0100 (CET) From: Harti Brandt X-X-Sender: brandt_h@beagle.kn.op.dlr.de To: Atis In-Reply-To: <7f9bf5711003190636k1aab3r2adce891e9acaad@mail.gmail.com> Message-ID: <20100319152014.T37887@beagle.kn.op.dlr.de> References: <7f9bf5711003190636k1aab3r2adce891e9acaad@mail.gmail.com> X-OpenPGP-Key: harti@freebsd.org MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-OriginalArrivalTime: 19 Mar 2010 14:25:05.0677 (UTC) FILETIME=[F86E83D0:01CAC76F] Cc: FreeBSD-hackers@freebsd.org Subject: Re: Google Summer of Code 2010 ideas X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Harti Brandt List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 19 Mar 2010 14:37:11 -0000 Hi, On Fri, 19 Mar 2010, Atis wrote: A>2) SCPS, Space Communication Protocol Standards A>This is probably my first project choice if all goes well. Space A>protocols - this sounds very cool :) and is related to my research A>interests (IP protocols over lossy networks). The first question is - A>do these protocols also have some practical value? This is not-so-new A>family of protocols, but it seems that very few implementations exist. A>On the one hand, this could be a good thing, because now there a A>chance for FreeBSD to be the first OS with open source SCPS A>implementation. On the other hand - lack of use seems to imply lack of A>importance and usefulness. The second question - is complete A>implementation of all the protocols supposed? At first glance it seem A>that e.g. SCPS Security Protocol simply duplicates the functionality A>already present in IPSec. Still, support for all protocols may be A>needed for interoperability and completeness of the implementation. A>Also, the amount of work required for this project is very unclear at A>the moment. Acctually the definition of these protocols has been taken over by CCSDS (ccsds.org). I think they are now in some of the green or blue books (cannot remember the color). There is some heavy push in the satellite community on moving towards CCSDS protocols so, for sure, there is practical value in the corresponding communities. I cannot answer the question to what extend an implementation is required. I know that we have some activity in the lower layers and that the upper layers are also used (file transfer, for example). Don't know about networking and security, though. harti