From owner-freebsd-net@FreeBSD.ORG Sun Apr 13 06:25:11 2008 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 29EF8106564A for ; Sun, 13 Apr 2008 06:25:11 +0000 (UTC) (envelope-from spawk@acm.poly.edu) Received: from acm.poly.edu (acm.poly.edu [128.238.9.200]) by mx1.freebsd.org (Postfix) with ESMTP id C956E8FC18 for ; Sun, 13 Apr 2008 06:25:10 +0000 (UTC) (envelope-from spawk@acm.poly.edu) Received: (qmail 4474 invoked from network); 13 Apr 2008 05:58:28 -0000 Received: from unknown (HELO ?192.168.0.2?) (spawk@69.123.45.64) by acm.poly.edu with AES256-SHA encrypted SMTP; 13 Apr 2008 05:58:28 -0000 Message-ID: <4801A0F8.1060002@acm.poly.edu> Date: Sun, 13 Apr 2008 01:58:16 -0400 From: Boris Kochergin User-Agent: Thunderbird 2.0.0.9 (X11/20071208) MIME-Version: 1.0 To: tmm References: <4800E2D5.20107@fastmail.fm> <480147C7.6090107@FreeBSD.org> <48017958.8020302@fastmail.fm> In-Reply-To: <48017958.8020302@fastmail.fm> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-net@freebsd.org Subject: Re: Howto send a limited broadcast? X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 13 Apr 2008 06:25:11 -0000 tmm wrote: > > > Bruce M. Simpson wrote: >> tmm wrote: >>> So, can anyone suggest how I can send a limited broadcast (on an >>> interface that has been initalized with an IP and a subnet)? >> >> Use the IP_ONESBCAST option and send to the network broadcast address >> for that subnet. The stack will change it into 255.255.255.255 on >> output. See man page ip(4) for details. >> >> It's a hack, but it's largely due to how the stack has worked >> historically. >> >> BMS > Thanks. I wasn't aware of that option. > > But now I find that this option is not present in my (eCos port of) > FreeBSD stack. Either it was removed during the port, or the ported > version is too old. > > Perhaps the best thing for me to do is to look at the 'normal' FreeBSD > stack (as opposed to the eCos one) and see how IP_ONESBCAST is > implemented. Then perhaps I could do the same thing in my FreeBSD stack. > > Is there a way for me to download the FreeBSD source code without > actually downloading, burning, and installing FreeBSD? Looking around > the FreeBSD website I don't see a source download link. > > thanks, > Tom. > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" You can get them via CVS: http://www.freebsd.org/doc/en/books/handbook/cvsup.html. Also, although it, too, may be considered hacky, if the system you're working on has pcap(3), you could just manually craft the broadcast frame and send it out the interface yourself. I can provide some sample code. -Boris