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Date: Sat, 15 Jun 1996 23:43:19 +1000 (EST)
From: Carey Nairn <cp_nairn@cc.utas.edu.au>
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To: Gary Palmer <gpalmer@FreeBSD.ORG>
cc: Branson Matheson <branson@widomaker.com>, FreeBSD-Questions@FreeBSD.ORG
Subject: Re: User PPP question 
In-Reply-To: <9894.834774881@palmer.demon.co.uk>
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On Fri, 14 Jun 1996, Gary Palmer wrote:

> Branson Matheson wrote in message ID
> <199606141136.HAA07912@garion.hq.ferg.com>:
> > >is there a way of determining whether an interface is connected 
> > >(particularly tun0) without trying to send something (e.g. ping 
> > >packets) across the interface ?  What I want to do is find out if the 
> > >interface is currently connected and iff it is then download mail from my 
> > >ISP.  
> 
> >  ifconfig -u | grep tun0 
> 
> root@palmer:/> ifconfig -au
> [--SNIP--]
> tun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1524
>         inet 158.152.50.150 --> 158.152.1.222 netmask 0xffff0000 
> [--SNIP--]
> 
> The interface is always `up' and `running' while the `ppp' program is
> attached to the device as otherwise the ppp program won't get any
> packets sent to it and it won't know when to auto dial.
> 
> There is *NO* automated way of doing this that I know of, short of
> writing a program which interrogates port 3000, which will need some
> smarts to do the parsing of the prompt(s) that you get presented with.

my thoughts as well.. I will have a look at that in a couple of weeks 
when I have finally finished my exams :)

thanks,
Carey

=========================================================================     
Carey Nairn                     ! email : Carey.Nairn@its.utas.edu.au
Networks and Communications     ! phone : (002) 20 7419
Information Technology Services ! fax   : (002) 20 7898
University of Tasmania.         !
=========================================================================