snmp_checks return odd junk
Andreas Ericsson
ae at op5.se
Fri Nov 3 12:16:10 CET 2006
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 55CC0000 -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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