From owner-freebsd-hackers Wed Dec 6 22:55:14 2000 From owner-freebsd-hackers@FreeBSD.ORG Wed Dec 6 22:55:12 2000 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from inetfw.sonycsl.co.jp (inetfw.SonyCSL.CO.JP [203.137.129.4]) by hub.freebsd.org (Postfix) with ESMTP id 39ED837B400 for ; Wed, 6 Dec 2000 22:55:12 -0800 (PST) Received: from hotaka.csl.sony.co.jp (hotaka.csl.sony.co.jp [43.27.98.57]) by inetfw.sonycsl.co.jp (8.9.3+3.2W/3.7Ws3/inetfw/2000050701/smtpfeed 1.07) with ESMTP id PAA59970; Thu, 7 Dec 2000 15:54:57 +0900 (JST) Received: from localhost (localhost [127.0.0.1]) by hotaka.csl.sony.co.jp (8.9.3+3.2W/3.7Ws3/hotaka/2000061722) with ESMTP id PAA82856; Thu, 7 Dec 2000 15:54:57 +0900 (JST) To: agoodloe@gradient.cis.upenn.edu Cc: freebsd-hackers@FreeBSD.org Subject: Re: Router Alert In-Reply-To: References: X-Mailer: Mew version 1.94.2 on Emacs 20.6 / Mule 4.0 (HANANOEN) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-Id: <20001207155457V.kjc@csl.sony.co.jp> Date: Thu, 07 Dec 2000 15:54:57 +0900 From: Kenjiro Cho X-Dispatcher: imput version 20000228(IM140) Lines: 20 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Alwyn Goodloe wrote: > I need to use Router Alert (rfc2113) > (http://www.phys-iasi.ro/Library/RFCs/rfc2113.htm) > > * Is there any documentation for using Router Alert in the FreeBSD > environement. > * Are there specific options that the Kernel must be compiled with? > * I know in Linux there is a IP_ROUTER_ALERT option that can be applied by > Root users to IP sockets to intercept all forwarded packets with the > Router Alert option. Does it work similarly for FreeBSD. Router alert is supported only in IPv6. Take a look at usr.sbin/{pim6sd,pim6dd} for how to use it. The advanced socket API for IPv6 router alert option is defined in http://www.ietf.org/internet-drafts/draft-ietf-ipngwg-rfc2292bis-02.txt There's no standard API for IPv4, though. -Kenjiro To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message