Date: Wed, 15 Nov 1995 01:30:45 +0800 (WST) From: Peter Wemm <peter@jhome.DIALix.COM> To: Joe Greco <jgreco@brasil.moneng.mei.com> Cc: hackers@freebsd.org Subject: Re: if_mux hack? Message-ID: <Pine.BSF.3.91.951115011302.309B-100000@jhome.DIALix.COM> In-Reply-To: <199511141625.KAA28744@brasil.moneng.mei.com>
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On Tue, 14 Nov 1995, Joe Greco wrote: > > Sound interesting? Is it a "worthy hack"? (especially since Linux has > > something like it.. :-) > > I had been intending to play with this under iijppp but never did. Since > the "tun" device brings an IP interface into userland, one should be able to > do whatever one pleases at that level... including writing alternative > transport mechanisms that do load balancing. > > :-) Yep.. I'd thought about this too. I also had an evil idea on how to get around lossy/saturated international internet links. Use if_tun to get datagrams out to userspace, and encapsulate them in UDP packets for transmission to a daemon on freefall, redundantly transmitting each UDP packet two or three times, or with a non-backoff retransmission algorithm... Desperate things for desperate times... Quite anti-social I know, but doing interactive work over a link that's doing 70% packet drop is extremely painful. :-( TCP is doing so much backoff that it's practically useless. (BTW: if there's an easy way to violate the RFC's by clamp the maximum TCP retransmission values I'd love to know...) -Peter > ... Joe > > ------------------------------------------------------------------------------- > Joe Greco - Systems Administrator jgreco@ns.sol.net > Solaria Public Access UNIX - Milwaukee, WI 414/342-4847 >
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