Date: Fri, 24 Apr 1998 21:08:52 +0200 (MET DST) From: Luigi Rizzo <luigi@labinfo.iet.unipi.it> To: julian@whistle.com (Julian Elischer) Cc: kjc@csl.sony.co.jp, current@FreeBSD.ORG Subject: Re: Bandwidth throttling etc. Message-ID: <199804241908.VAA21907@labinfo.iet.unipi.it> In-Reply-To: <3540D3AE.52BFA1D7@whistle.com> from "Julian Elischer" at Apr 24, 98 11:02:03 am
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> Luigi Rizzo wrote:
...
> I notice that teh mpath module released the other day
what is this module and who released it ?
> works for him so I guess it should work for us.. :-)
it's not much that it works or not, it is being useful or not.
> Also, on the topic of BPF for ip filter descriptions.
...
> Having spent a while looking at it yesterday, I think that our
> knowledge that the filter is working with an IP packet can be used
> to produce a much more efficient filter than BPF. As a 'language',
> ipfilter or ipfw would each be a better place to start.
right... and in any case, for initial experiments probably ipfw can be
enough. A simple optimization could be to split the inbound and
outbound rules since this is tested on each rule.
I have already added the flow_id field to the mbuf header and things
seem to work (this is on a diskless machine so you bet the code is
exercised).
I am also working on extending the ipfw interface to add more actions.
I have added one:
ipfw add [number] pipe X ...filtering option...
which passes traffic through a "pipe" module with given delay, bw and
buffers. Another command will be necessary to configure a "pipe":
ipfw pipe {add|get|configure|delete} bw XX delay YY buffers ZZ
and this way you should be able to do class-based throttling.
If everything goes well, the bandwidth limiting code (dummynet)
should be working under ipfw control in a week or so.
cheers
luigi
-----------------------------+--------------------------------------
Luigi Rizzo | Dip. di Ingegneria dell'Informazione
email: luigi@iet.unipi.it | Universita' di Pisa
tel: +39-50-568533 | via Diotisalvi 2, 56126 PISA (Italy)
fax: +39-50-568522 | http://www.iet.unipi.it/~luigi/
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