[Xymon] FreeBSD [ifstat] processing

[Jeremy Laidman]

On 17 February 2014 23:24, Jeremy Laidman <jlaidman at rebel-it.com.au> wrote:

> On 17 February 2014 18:48, Jeremy Laidman <jlaidman at rebel-it.com.au>wrote:
>
>> For this reason, it seems to make sense that the "link" lines are
>> probably the best for this, as I would think that they would show packets
>> contained only in physical frames (ethernet or some other medium).
>>
>

> So I'm proposing that the FreeBSD client be adjusted from this:
>

> echo "[ifstat]"
> netstat -i -b -n | egrep -v "^lo|<Link"
>
> To this:
>
> echo "[ifstat]"
> netstat -i -b -n | egrep "<Link"
>


> Seem reasonable?  Would anyone be adversely impacted by this suggested
> change?
>

Anyone?  Nobody else using FreeBSD?

I've implemented a work-around that works for me, by using the following
line in xymonclient-freebsd.sh:

netstat -ibn|egrep "<Link|Name"| grep -v ^lo | while read A B C D E F G; do
[ $A = "Name" ] || { C=0.0.0.0/0; D=0.0.0.0; }; printf "%-5s %5s %-13s
%-17s %12s %6s %14s %14s %6s %14s %6s\n" $A $B $C $D $E $F $G; done

The output now only includes interface lines with "<Link" that are not
loopback devices (thus ignoring all the non-physical entries), and the
"<Link#1>" and MAC address lines have been replaced with dummy values that
parse correctly on the server.  I now have useful interface graphs for my
FreeBSD systems.

This is an ugly hack, and I only want this in place until a proper solution
can be implemented.

So, I'm proposing that the xymonclient-freebsd.sh script be modified to use
this line for [ifstat]:

  netstat -ibn | egrep "<Link|Name"|grep -v ^lo

(This could leave the loopback addresses in place, and I don't think anyone
would mind.)

Then, the following (untested) patch to do_ifstat.c.

What say ye all?

Cheers
Jeremy

--- do_ifstat.c.orig    2014-02-20 13:35:33.000000000 +1100
+++ do_ifstat.c 2014-02-20 13:42:32.000000000 +1100
@@ -27,8 +27,10 @@

 /* Name MTU  Network        IP            Ipkts Ierrs Ibytes Opkts Oerrs
Obytes Coll */
 /* lnc0 1500 172.16.10.0/24 172.16.10.151 26    -     1818   26    -
1802   -    */
+/* Name MTU  Network  Address             Ipkts Ierrs Ibytes Opkts Oerrs
Obytes Coll */
+/* em0  1500 <Link#1> 00:11:22:33:44:55   26    -     1818   26    -
1802   -    */
 static const char *ifstat_freebsd_exprs[] = {
-
"^([a-z0-9]+)\\s+\\d+\\s+[0-9.\\/]+\\s+[0-9.]+\\s+\\d+\\s+[0-9-]+\\s+(\\d+)\\s+\\d+\\s+[0-9-]+\\s+(\\d+)\\s+[0-9-]+"
+
"^([a-z0-9]+)\\s+\\d+\\s+<Link#\\d+>\\s+[:0-9]+\\s+\\d+\\s+[0-9-]+\\s+(\\d+)\\s+\\d+\\s+[0-9-]+\\s+(\\d+)\\s+[0-9-]+"
 };

 /* Name    Mtu Network       Address         Ipkts Ierrs Idrop     Ibytes
   Opkts Oerrs     Obytes  Coll */
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