From owner-freebsd-hackers Sun Dec 7 19:45:01 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id TAA23727 for hackers-outgoing; Sun, 7 Dec 1997 19:45:01 -0800 (PST) (envelope-from owner-freebsd-hackers) Received: from anlsun.ebr.anlw.anl.gov (anlsun.ebr.anlw.anl.gov [141.221.1.2]) by hub.freebsd.org (8.8.7/8.8.7) with SMTP id TAA23689 for ; Sun, 7 Dec 1997 19:44:49 -0800 (PST) (envelope-from cmott@srv.net) Received: from darkstar.home (ras537.srv.net [205.180.127.37]) by anlsun.ebr.anlw.anl.gov (8.6.11/8.6.11) with SMTP id UAA10510; Sun, 7 Dec 1997 20:44:40 -0700 Date: Sun, 7 Dec 1997 20:44:06 -0700 (MST) From: Charles Mott X-Sender: cmott@darkstar.home To: Brad Karp cc: pst@shockwave.com, freebsd-hackers@FreeBSD.ORG, karp@dominator.eecs.harvard.edu Subject: Re: FreeBSD Metricom driver: I wrote one in September... In-Reply-To: <199712080258.VAA19022@dominator.eecs.harvard.edu> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk On Sun, 7 Dec 1997, Brad Karp wrote: > My driver is written over the IP tunnel (tun), and is completely portable > (no #ifdefs, even) between FreeBSD and NetBSD (I use it on both systems). It > does neighbor discovery, dynamically handles IP-to-MAC mapping for the radios > (with no centralized ARP server, despite the non-broadcast nature of Metricom's > radios), and works very well, overall. I'd be curious to hear how your IP-MAC mapping works. Is it some sort of stochastic token passing between neighbors? To what size networks can it scale? Some obscure questions, since you've seriously worked with the metricom hardware: how intrinsically doppler tolerant is the communications waveform? What modulation scheme? What chip rate? Charles Mott