snmp_checks return odd junk

[James Affeld]

Thanks - updating to plugins version 1.4.5 from 1.4.3 fixed.  

----- Original Message ----
From: Andreas Ericsson <ae at op5.se>
To: James Affeld <jamesaffeld at yahoo.com>
Cc: nagios-users at lists.sourceforge.net
Sent: Friday, November 3, 2006 3:16:10 AM
Subject: Re: [Nagios-users] snmp_checks return odd junk

James Affeld wrote:
> When I run just about any kind of SNMP check, I get suitable info at the beginning of the response, but a bunch of junk at the end.  It even runs into the next command line.  As you might gather, this is done via an ssh connection, using putty.
> 
> root at silmec2:/usr/local/nagios/libexec# ./check_snmp -H 10.139.7.1 -o .1.3.6.1.4.1.9.9.48.1.1.1.6.1 -C REDACTED -P 1
> SNMP OK - 17448296 | iso.3.6.1.4.1.9.9.48.1.1.1.6.1=17448296Üjú·ôB¿¹ÈÈÜjú·ÔB¿`B¿¨B¿¢é·;;;;
> root at silmec2:/usr/local/nagios/libexec# PuTTYPuTTYPuTTYPuTTYPuTTY
> 
> If I do an snmpwalk vs. that OID, it returns cleanly.  
> 
> root at silmec2:/usr/local/nagios/libexec# snmpwalk 10.139.7.1 iso.3.6.1.4.1.9.9.48.1.1.1.6.1 -c REDACTED -v 1
> SNMPv2-SMI::enterprises.9.9.48.1.1.1.6.1 = Gauge32: 17390392
> root at silmec2:/usr/local/nagios/libexec#
> 
> 
> I run into the same problem checking a Cisco Catalyst 6009 and HP 2524 switches.   Any clues?
> 

Sounds like the buffer used to contain the string gotten back from 
snmpget isn't NUL-terminated. I vaguely remember this as a bug in the 
runcmd functions in the plugins when they were first introduced (mea 
culpa). It was a pretty bizarre error and only appeared 
if(strlen(output) % sizeof(long) == 0), so it's not easily reproducable.

Try updating the plugin package at silmec2 and see if that fixes it.

-- 
Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231






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