Date: Sat, 07 Mar 1998 12:22:26 +0000 From: Brian Somers <brian@Awfulhak.org> To: Peter van Heusden <pvh@leftside.wcape.school.za> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Detecting state of PPP Message-ID: <199803071222.MAA10028@awfulhak.org> In-Reply-To: Your message of "Sat, 05 Mar 1998 07:16:09 %2B0200." <Pine.BSF.3.95.980305071307.15655F-100000@leftside.wcape.school.za>
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> Hi
>
> How does one go about writing a program to check if a PPP link is up or
> down? I'm running PPP in -auto mode, and I'd like to be able to tell
> whether the PPP link is actually up (i.e. the modem connection is in
> place) at any particular time. Unfortunately, the flags on tun0 stay the
> same (0x8051 on my system) whether the modem is connected or not. What
> should I be looking at?
Wow, what a range of answers.
The ifconfig | fgrep UP answer is wrong as ppp -auto will keep the
interface UP so that it can detect traffic that'll bring the line
up.
The correct answer is the one about the PPP prompt (it's mentioned in
the pppctl man page).
The problem of course is that ppp will only accept one diagnostic
connection, so if someone else is already talking to ppp, you get no
answer :-|
I plan to facilitate ``status'' connections soon. This ``status''
socket will be like a read-only diagnostic socket that pumps out
information about the state of ppp periodically. It will allow a
configurable number of connections. I'll probably do a little
tcl program to show how it works too (but my tcl's not too good).
> Thanks,
> Peter
> --
> Peter van Heusden | Computers Networks Reds Greens Justice Peace Beer Africa
> pvh@leftside.wcape.school.za | Support the SAMWU 50 litres campaign!
--
Brian <brian@Awfulhak.org>, <brian@FreeBSD.org>, <brian@OpenBSD.org>
<http://www.Awfulhak.org>;
Don't _EVER_ lose your sense of humour....
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