Date: Tue, 22 May 2007 14:49:12 +0530 From: Sastry Tumuluri <sas3@tumuluri.name> To: "'Tom Judge'" <tom@tomjudge.com> Cc: freebsd-net@freebsd.org Subject: RE: Detecting LINK_UP / LINK_DOWN events Message-ID: <003c01c79c52$476214d0$7b9ba8c0@HarryPurvis> In-Reply-To: <4651E556.9020602@tomjudge.com> References: <c315f8d20705211038s52f83ff5o14486a3a8b40fac3@mail.gmail.com> <4651E556.9020602@tomjudge.com>
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> -----Original Message-----
> From: Tom Judge [mailto:tom@tomjudge.com]
> Sent: Tuesday, May 22, 2007 12:01 AM
> To: Sastry Tumuluri
> Cc: freebsd-net@freebsd.org
> Subject: Re: Detecting LINK_UP / LINK_DOWN events
>
> Sastry Tumuluri wrote:
> > Friends,
> >
> > I am trying to catch and do some extra processing on LINK_UP and
> > LINK_DOWN events for my net interfaces (e.g., notify my
> admin, log the event, ...).
> > Tried this on both FreeBSD 6.1 and on FreeBSD 6.2.
> >
> > I tried using the devd.conf file with the following code (shows
> > LINK_DOWN; wrote similar stuff for LINK_UP):
> >
> > notify 10 {
> > match "type" "LINK_DOWN";
> > action "logger -s alert: Caught LINK_DOWN on dev: $device-name
> > subsys: $subsystem";
> > };
> >
> > Didn't work. I tried the above with both strict match conditions
> > (using vendor, device and class matches) as well as very
> general (like the above).
> > Didn't work.
> > I ran killed devd and ran it in the foreground with "devd
> -dD". Then I
> > logged into a different pty and used
> > ifconfig lnc0 down #(lnc0 is my ethernet device).
> > devd doesn't even seem to catch the event (no output at all
> - both on
> > screen and in syslog).
> >
> >
> > On the other hand, "nomatch" and "attach" messages do seem to get
> > through (I wrote similar stuff for nomatch & attach, and they are
> > showing up at bootup and in syslog).
> > What could I be doing wrong?
> >
>
> Have you had a look at net/ifstated in ports?
>
> Tom
>
Thanks, Tom! Though I had not heard of ifstated before this, it looks
interesting. I've managed to quickly get the latest port and install it
without any hassles - but am still a bit short on documentation - esp., how
the .conf file works, and how to make ifstated work for me. I haven't used
carp so far; and am not sure whether I need to, if all I want is a simple
"notification / logging". Any suggestions?
On the other hand, I am still curious why devd didn't work in the first
place. Is it a "futuristic" feature already advertised (in the devd.conf
file, there are examples of LINK_UP/LINK_DOWN that make it look like it
should work)? Or a case for better documentation?
Regards,
==Sas3==
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