Date: Tue, 22 Feb 2000 18:53:46 -0800 From: Julian Elischer <julian@elischer.org> To: Archie Cobbs <archie@whistle.com> Cc: Yevmenkin Maksim N CSCIO <myevmenkin@att.com>, freebsd-current@freebsd.org, freebsd-hackers@freebsd.org Subject: Re: NETGRAPH patches (proposal) Message-ID: <38B34BBA.41C67EA6@elischer.org> References: <200002222225.OAA42237@bubba.whistle.com>
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Archie Cobbs wrote: > > Yevmenkin, Maksim N, CSCIO writes: > > > > Here is the description. ng_ether node has two hooks ``divert'' and > > > > ``orphan''. > > > > It is possible to connect to the one of the hooks and > > > intercept row Ethernet > > > > frames. But there is no clean way to intercept frame, do > > > something and > > > > return it back to kernel. > > > > > > > > This patch provides additional hook ``divertin'' (mmm... > > > name is not good, > > > > i think) for each ng_ether node. > > > > > > > > Implementation issues > > > > > > > > This will not work for ``orphan'' frames. Since kernel > > > drops it anyway, i > > > > decided to leave it as it is. But is is possible to > > > intercept ``orphan'' > > > > packets, change it, and write back to ``divertin''. > > > > > > The "divertin" hook is a useful idea.. after 4.0-REL we can check > > > something in based on your patches... > > > > > > > ok. i just have a dumb question. what is the big deal with updating > > ether_shost > > in ethernet header in ngether_rcvdata. since we are passing raw ethernet > > frame, > > why should we update ether_shost? wouldn't it be nice to make it optional? > > just another control message? > > I agree.. you should have to set the host address manually. > > -Archie It's because all packets sent by this node should have the node's address. If you don't have it then PPPoE cannot send a packet "FROM" thia node, as it has no idea of what this node's address is. > > ___________________________________________________________________________ > Archie Cobbs * Whistle Communications, Inc. * http://www.whistle.com > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message -- __--_|\ Julian Elischer / \ julian@elischer.org ( OZ ) World tour 2000 ---> X_.---._/ presently in: Perth v To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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