From owner-freebsd-arch  Mon Jan 29 16:11:49 2001
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From: Luigi Rizzo <rizzo@aciri.org>
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Subject: Re: Is anybody working on bridging code & a question for -arch on  userland/kernel
In-Reply-To: <4.3.2.7.0.20010130002432.00b5f100@mail.drwilco.net> from "Rogier R. Mulhuijzen" at "Jan 30, 2001  0:31:38 am"
To: drwilco@drwilco.net (Rogier R. Mulhuijzen)
Date: Mon, 29 Jan 2001 16:11:13 -0800 (PST)
Cc: freebsd-net@FreeBSD.ORG, freebsd-arch@FreeBSD.ORG
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> 1) Is anyone working on the bridging code? I'm going to extend the 
> ng_bridge node with Spanning Tree Protocol and I wouldn't want to be 
> duplicating work. I checked in -current, but I thought I'd check on -net as 
> well. (And -arch because of my next question)

i am doing some minor fixes to the non-netgraph version of
the bridging code.

> 2) Where does one draw the line at handling stuff in the kernel or 
> userspace. The algorithms that are used in the Spanning Tree Protocol 
> aren't very complicated, and I'm pretty sure I could contain everything in 
> kernel space, but what is the Right Thing to do? Everything in kernelspace, 
> or running a userland daemon that does all the calculating, decision making 
> and time tracking?

i'd rather do as much as possible in userspace, and issue appropriate
calls (basically sysctl or similar to enable/disable forwarding
on some of the bridged interfaces) when necessary.
If you need a specific control interface i will be glad to
implement it, and your spanningTreed will be much much easier
to implement, test, maintain and reuse for different bridging things
(not to mention that a single box can act as multiple independent
bridges for which you want multiple spanning trees).

let me know if you have some spanning tree code that you want to
test/integrate.

	cheers
	luigi
----------------------------------+-----------------------------------------
 Luigi RIZZO, luigi@iet.unipi.it  . ACIRI/ICSI (on leave from Univ. di Pisa)
 http://www.iet.unipi.it/~luigi/  . 1947 Center St, Berkeley CA 94704
 Phone: (510) 666 2927
----------------------------------+-----------------------------------------


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