Date: Mon, 04 Feb 2002 15:43:10 +0100 From: Marko Zec <zec@tel.fer.hr> To: Julian Elischer <julian@elischer.org>, freebsd-net@freebsd.org Subject: Re: ng_dummy - netgraph traffic shaping node Message-ID: <3C5E9DFE.4AEB55BE@tel.fer.hr> References: <Pine.BSF.4.21.0202011012400.67160-100000@InterJet.elischer.org>
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Julian Elischer wrote: > hmm interesting... > > any docs? > (we always include a man page when we commit a new node type.) As the code is still work in progress, writing manpages doesn't make too much sense before reaching a mature code state. Until then, I hope a basic howto included on the web page will do the job. > Any comments on netgraph in general I'm still catching the impressions right now, though I must admit the first banal thing I noticed I don't like is somewhat unconsistent hook naming (left/right, upper/lower, downstream/upstream etc.). Btw, where could I find some examples on parsing setsockopt() calls to selected nodes, if such thing is possible at all? Marko > On Fri, 1 Feb 2002, Marko Zec wrote: > > > The result of an innocent netgraph programming exercise can be found at: > > > > http://www.tel.fer.hr/zec/BSD/ng_dummy/ > > > > "ng_dummy" is a simple traffic shaper node that implements control of > > traffic flow in both upstream and downstream direction. In each > > direction, the traffic flows through the sequence of two FIFO-type > > queues, which implement different queuing policies. The "inbound" queue > > is rate limited, and emulates an interface output buffer. On "outbound" > > queue, frames are dequeued based on preconfigured delay, thus emulating > > propagation effects on a transmission link. Additional features include > > random frame discarding based on BER; and emulation of phantom traffic, > > which competes for available bandwidth, and thereby introduces inbound > > queue congestions and delay jitter. > > > > Have fun! > > > > Marko > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-net" in the body of the message > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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