Thread View: comp.protocols.ppp
6 messages
6 total messages
Started by David Clunie
Sat, 26 Sep 1992 11:48
Dial on demand ppp & slip together ?
Author: David Clunie
Date: Sat, 26 Sep 1992 11:48
Date: Sat, 26 Sep 1992 11:48
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I am about to set up a dial-on-demand style ppp link (you know - when a tcp/ip packet or whatever comes along it gets queued until the phone link is dial, which later times out if not needed). I am planning on using "dp.2.0.tar.Z" to do the job, which seems easy enough to install. However some of the sites I want to connect to want to use slip not ppp, so then I thought fine, I'll just install "dialupip2.0.tar.Z" as well. Then I thought, this is silly, duplicating all that functionality, and there is bound to be a conflict somewhere, so I thought I'd get the ppp one going and later hack it do both ppp and slip depending on some configuartion parameter. Before I start, I thought I'd just ask if anyone else had done this before and had any success ! -- David Clunie (dclunie@itd.adelaide.edu.au)
Re: Dial on demand ppp & slip together ?
Author: Bob Sutterfield
Date: Sat, 26 Sep 1992 23:05
Date: Sat, 26 Sep 1992 23:05
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In article <1a1imaINNbdo@huon.itd.adelaide.edu.au> dclunie@sirius.ucs.adelaide.edu.au (David Clunie) writes: ...I thought I'd get the ppp one going and later hack it do both ppp and slip depending on some configuartion parameter. Before I start, I thought I'd just ask if anyone else had done this before and had any success ! When we released v1.0 of Morning Star PPP, it did only PPP. We stuck our noses in the air and proclaimed that we were such purists that we wouldn't bother supporting the ancient, ill-defined, less-functional, nonstandard SLIP. But then we kept hearing from customers who had to talk to hosts that talked only SLIP, and the protocol purity party line seemed to make less and less capitalistic sense. So I spent a morning experimenting, and found that once the on-demand dialing, idle-line hangup, packet filtering, IP interface, VJ compression, and all that other work has been done, it's really pretty simple to short-circuit the FCS generation and checking, the asyncmap handling, and all of PPP's other useful features. I hot-wired the finite state machine to "Opened", since SLIP has no negotiation phase. So our PPP daemon quickly had a "slip" command line option. Since it was already there, it was easier to delta it into our SCCS'd sources than to rip it out again. Maybe another half-day total since then has been spent debugging and documenting it, and adding a convenient peer-CSLIP-capability-detection feature. So it shipped in v1.1, and now the marketing folks have another feature for their bullet list. Our source is probably significantly different from source of the Purdue on-demand dialing implementation you said you were about to try, but I don't know how different because I haven't looked at the Purdue code. I know for sure that our product is quite a bit different from the other popular free Sun-based PPP code. But you still shouldn't have too much trouble making any existing PPP implementation do SLIP, since SLIP is such a simple protocol.
Re: Dial on demand ppp & slip together ?
Author: Brian Glendenning
Date: Mon, 28 Sep 1992 15:16
Date: Mon, 28 Sep 1992 15:16
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In article <1a1imaINNbdo@huon.itd.adelaide.edu.au> dclunie@sirius.ucs.adelaide.edu.au (David Clunie) writes:
I am about to set up a dial-on-demand style ppp link (you know - when
a tcp/ip packet or whatever comes along it gets queued until the
phone link is dial, which later times out if not needed). I am
planning on using "dp.2.0.tar.Z" to do the job, which seems easy
enough to install.
[...]
The copy of this I have doesn't have any documentation on how to
actually use the programs that get made (the README says what the
various directories contain in a very general way). While I can
probably figure it out from the etc/* samples, I thought I'd ask for
documentation first.
Brian
--
Brian Glendenning - National Radio Astronomy Observatory
bglenden@nrao.edu Charlottesville Va. (804) 296-0286
Re: Dial on demand ppp & slip together ?
Author: Ignatios Souvatzis
Date: Mon, 28 Sep 1992 19:11
Date: Mon, 28 Sep 1992 19:11
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Err... get dp-2.2-beta.tar.Z, there are only two swall typos in the
Makefile (I can send you the patches), and it's much better documented
and usable than -2.0.
--
Paper mail: Ignatios Souvatzis, Radioastronomisches Institut der
Universitaet Bonn, Auf dem Huegel 71, D-5300 Bonn 1, FRG
Internet: souva@babsy.mpifr-bonn.mpg.de ignatios@cs.uni-bonn.de
which dp-2* version to use (Was: Re: Dial on demand ppp & slip together ?)
Author: Ignatios Souvatzis
Date: Mon, 28 Sep 1992 19:12
Date: Mon, 28 Sep 1992 19:12
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Err... get dp-2.2-beta.tar.Z, there are only two swall typos in the
Makefile (I can send you the patches), and it's much better documented
and usable than -2.0.
--
Paper mail: Ignatios Souvatzis, Radioastronomisches Institut der
Universitaet Bonn, Auf dem Huegel 71, D-5300 Bonn 1, FRG
Internet: souva@babsy.mpifr-bonn.mpg.de ignatios@cs.uni-bonn.de
Re: Dial on demand ppp & slip together ?
Author: David Clunie
Date: Tue, 29 Sep 1992 09:42
Date: Tue, 29 Sep 1992 09:42
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> The copy of this I have doesn't have any documentation ... No. A pity ... but I have found lots of useful and relevant advice by reviewing the documentation with dialupip - the slip predeccessor of dp.2.0. This is particlularly true of the scripts, though there are small "enhancements" ! Maybe if I learn enough about the program while I am hacking at it I will write some docs ! No promises. david -- David Clunie (dclunie@itd.adelaide.edu.au)
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