From owner-freebsd-net Fri Aug 18 22: 1:37 2000 Delivered-To: freebsd-net@freebsd.org Received: from shuttle.wide.toshiba.co.jp (shuttle.wide.toshiba.co.jp [202.249.10.124]) by hub.freebsd.org (Postfix) with ESMTP id 1250437B423 for ; Fri, 18 Aug 2000 22:01:34 -0700 (PDT) Received: from localhost (shuttle.sixyards.wide.toshiba.co.jp [3ffe:501:100f:0:200:f8ff:fe01:61cf]) by shuttle.wide.toshiba.co.jp (8.9.1+3.1W/8.9.1) with ESMTP id NAA16270; Sat, 19 Aug 2000 13:47:16 +0900 (JST) Date: Sat, 19 Aug 2000 13:56:42 +0900 Message-ID: From: JINMEI Tatuya / =?ISO-2022-JP?B?GyRCP0BMQEMjOkgbKEI=?= To: gbnaidu@sasi.com Cc: freebsd-net@FreeBSD.ORG Subject: Re: multicast packets & tcpdump... In-Reply-To: In your message of "Thu, 17 Aug 2000 16:11:34 +0530 (IST)" References: User-Agent: Wanderlust/2.3.0 (Roam) Emacs/20.6 Mule/4.0 (HANANOEN) Organization: Research & Development Center, Toshiba Corp., Kawasaki, Japan. MIME-Version: 1.0 (generated by SEMI 1.13.7 - "Awazu") Content-Type: text/plain; charset=US-ASCII X-Dispatcher: imput version 980905(IM100) Lines: 19 Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org >>>>> On Thu, 17 Aug 2000 16:11:34 +0530 (IST), >>>>> "G.B.Naidu" said: > Thanks to all who responded. The source socket was bound to multicast > group address rather than to the INADDR_ANY address. Surprisingly linux > works even with the multicast group address. I don't think it's so surprising. Binding a socket to a multicast address is not fully documented, and thus the semantics just varies over implementations. (however, I admit the current BSD's behavior is *worse* than one of linux. It simply allows normal user to send invalid packets to the wire.) JINMEI, Tatuya Communication Platform Lab. Corporate R&D Center, Toshiba Corp. jinmei@isl.rdc.toshiba.co.jp To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message