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Date: Wed, 30 Oct 1996 17:39:15 -0800
From: Julian Elischer <julian@whistle.com>
Organization: Whistle Communications
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To: Julian Assange <proff@suburbia.net>
CC: freebsd-hackers@freebsd.org
Subject: Re: FreeBSD and IP tunneling
References: <199610310046.LAA10960@suburbia.net>
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Julian Assange wrote:
> 
> > Packets sent on the tun* interfaces show up as data to be read on /dev/tun*.
> > Data written on /dev/tun* shows up as input packets on the tun* interfaces.
> > So, if you want to do UDP encapsulated tunnelling, you should do something like
> 
> Are there as yet no userland tools to do this? It seems like something that
> should be addressed. What about IPIP? Writing can be done easily enough with
> IP_HDRINCL, but how do you go about reading such packets short of bpf?
> 
For such things we use the divert sockets here..
:)