Date: Wed, 8 Mar 2000 12:06:48 +0100 (MET) From: hm@hcs.de (Hellmuth Michaelis) To: archie@whistle.com (Archie Cobbs) Cc: freebsd-isdn@FreeBSD.ORG, freebsd-hackers@FreeBSD.ORG Subject: Re: ijppp for isdn, ppp compression, and netgraph (also: load balancing) Message-ID: <20000308110649.3674A3A34@hcswork.hcs.de> In-Reply-To: <200003071834.KAA41887@bubba.whistle.com> from Archie Cobbs at "Mar 7, 0 10:34:40 am"
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(CC: stripped) From the keyboard of Archie Cobbs: > Here is my list of things that 'should be done' at some point: > > 1. Implement the various PPP compression types as netgraph nodes, > starting with Deflate, then maybe predictor-1, STAC (if we can > do it legally), and MPPC (same thing). Sounds good. The link in the original mail points to a Linux (GPL) implementation of the STAC compression. Since i was under the impression that STAC is patented, i've contacted the author about this and it seems that STAC either did not notice his implementation, does not care about it, or that it is legal to reimplement it here in Germany or Europe. Perhaps it might be possible to use this somehow, or at least provide hooks to use it ... > 2. We should come up with a 'standard' netgraph control message > API for an ISDN basic rate interface, and have i4b implement > this interface. Then mpd/ppp/etc can "know" this interface > and therefore work automatically with any ISDN BRI device. > Here is the interface that we use at Whistle: > ftp://ftp.whistle.com/pub/archie/netgraph/ng_tn.h > (note: the switch types are #defined in another file but include > all of the usual suspects: ETSI, NI-1, AT&T, DMS100, etc.) The problem here is, that the Whistle ISDN stack has a fundamentally different view of the world than i4b has :-) As far as i understood it, the Whistle ISDN stack is almost completely configurable by using netgraph messages whereas i4b is configured by its isdnd config file. I have made some experiments with mppd over the i4b netgraph b-channel interface and it works beautifully here without any additional configuration messages necessary. But i have no idea, if the real world demands some control messages, such as dial, dial a number, hangup etc. Any ideas how to proceed with this ? hellmuth -- Hellmuth Michaelis Tel +49 40 55 97 47-70 HCS Hanseatischer Computerservice GmbH Fax +49 40 55 97 47-77 Oldesloer Strasse 97-99 Mail hm [at] hcs.de D-22457 Hamburg WWW http://www.hcs.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isdn" in the body of the message
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