From owner-freebsd-net@FreeBSD.ORG Fri Aug 9 20:34:47 2013 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id ED10CDD3 for ; Fri, 9 Aug 2013 20:34:47 +0000 (UTC) (envelope-from rmind@netbsd.org) Received: from mail.netbsd.org (mail.NetBSD.org [IPv6:2001:4f8:3:7::25]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id D8CEF20DF for ; Fri, 9 Aug 2013 20:34:47 +0000 (UTC) Received: from ws (localhost [IPv6:::1]) by mail.netbsd.org (Postfix) with SMTP id 428A714A308; Fri, 9 Aug 2013 20:34:46 +0000 (UTC) Date: Fri, 9 Aug 2013 21:34:25 +0100 From: Mindaugas Rasiukevicius To: Steven Bellovin Subject: Re: BPF_MISC+BPF_COP and BPF_COPX In-Reply-To: <38CDC9BB-09C7-4241-8746-163BD15B80EC@cs.columbia.edu> References: <20130804191310.2FFBB14A152@mail.netbsd.org> <5202693C.50608@netbsd.org> <20130807175548.1528014A21F@mail.netbsd.org> <5203535D.2040508@netbsd.org> <38CDC9BB-09C7-4241-8746-163BD15B80EC@cs.columbia.edu> X-Mailer: mail(1) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Message-Id: <20130809203446.428A714A308@mail.netbsd.org> Cc: tech-net@NetBSD.org, guy@alum.mit.edu, darrenr@NetBSD.org, freebsd-net@freebsd.org X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 09 Aug 2013 20:34:48 -0000 Steven, Steven Bellovin wrote: > There's a one-word summary: *assurance*. With the current design, > it's easy to *know* what can happen. With a Turing-complete extension, > it isn't. It is still easy and the concept itself is very simple. I mentioned that this extension does not make byte-code Turing-complete and the rest is in your control. Darren ignored it. -- Mindaugas