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#! /usr/bin/perl -w -I ..
#
# Subagent for testing check_snmp
#
#use strict; # Doesn't work
use NetSNMP::OID qw(:all);
use NetSNMP::agent;
use NetSNMP::ASN qw(ASN_OCTET_STR ASN_COUNTER ASN_COUNTER64 ASN_INTEGER ASN_INTEGER64 ASN_UNSIGNED ASN_UNSIGNED64);
#use Math::Int64 qw(uint64); # Skip that module whie we don't need it
sub uint64 { return $_ }
if (!$agent) {
print "This program must run as an embedded NetSNMP agent\n";
exit 1;
}
my $baseoid = '.1.3.6.1.4.1.8072.3.2.67';
# Next are arrays of indexes (Type, initial value and increments)
# Undef miltipliers are randomized
my $multiline = 'Cisco Internetwork Operating System Software
IOS (tm) Catalyst 4000 "L3" Switch Software (cat4000-I9K91S-M), Version
12.2(20)EWA, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2004 by cisco Systems, Inc.
';
my $multilin2 = "Kisco Outernetwork Oserating Gystem Totware
Copyleft (c) 2400-2689 by kisco Systrems, Inc.";
my $multilin3 = 'This should not confuse check_snmp "parser"
into thinking there is no 2nd line';
my $multilin4 = 'It\'s getting even harder if the line
ends with with this: C:\\';
my $multilin5 = 'And now have fun with with this: "C:\\"
because we\'re not done yet!';
my @fields = (ASN_OCTET_STR, ASN_OCTET_STR, ASN_OCTET_STR, ASN_OCTET_STR, ASN_OCTET_STR, ASN_UNSIGNED, ASN_UNSIGNED, ASN_COUNTER, ASN_COUNTER64, ASN_UNSIGNED, ASN_COUNTER, ASN_OCTET_STR, ASN_OCTET_STR, ASN_OCTET_STR, ASN_OCTET_STR );
my @values = ($multiline, $multilin2, $multilin3, $multilin4, $multilin5, 4294965296, 1000, 4294965296, uint64("18446744073709351616"), int(rand(2**32)), 64000, "stringtests", "3.5", "87.4startswithnumberbutshouldbestring", '555"I said"' );
my @incrts = (undef, undef, undef, undef, undef, 1000, -500, 1000, 100000, undef, 666, undef, undef, undef, undef );
# Number of elements in our OID
my $oidelts;
{
my @oid = split(/\./, $baseoid);
$oidelts = scalar(@oid);
}
my $regoid = new NetSNMP::OID($baseoid);
$agent->register('check_snmp_agent', $regoid, \&my_snmp_handler);
sub my_snmp_handler {
my ($handler, $registration_info, $request_info, $requests) = @_;
for (my $request = $requests; $request; $request = $request->next) {
my $oid = $request->getOID();
my $index;
my $next_index;
# Validate the OID
my @numarray = $oid->to_array();
if (@numarray != $oidelts) {
if ($request_info->getMode() == MODE_GETNEXT && @numarray == ($oidelts - 1)) {
# GETNEXT for the base oid; set it to the first index
push(@numarray, 0);
$next_index = 0;
} else {
# We got a request for the base OID or with extra elements
$request->setError($request_info, SNMP_ERR_NOERROR);
next;
}
}
$index = pop(@numarray);
if ($index >= scalar(@fields)) {
# Index is out of bounds
$request->setError($request_info, SNMP_ERR_NOERROR);
next;
}
# Handle the request
if ($request_info->getMode() == MODE_GETNEXT) {
if (++$index >= scalar(@fields)) {
# Index will grow out of bounds
$request->setError($request_info, SNMP_ERR_NOERROR);
next;
}
$index = (defined($next_index) ? $next_index : $index);
$request->setOID("$baseoid.$index");
} elsif ($request_info->getMode() != MODE_GET) {
# Everything else is write-related modes
$request->setError($request_info, SNMP_ERR_READONLY);
next;
}
# Set the response... setValue is a bit touchy about the data type, but accepts plain strings.
my $value = sprintf("%s", $values[$index]);
$request->setValue($fields[$index], $value);
# And update the value
if (defined($incrts[$index])) {
$values[$index] += $incrts[$index];
} elsif ($fields[$index] != ASN_OCTET_STR) {
my $minus = int(rand(2))*-1;
$minus = 1 unless ($minus);
my $exp = 32;
$exp = 64 if ($fields[$index] == ASN_COUNTER64 || $fields[$index] == ASN_INTEGER64 || $fields[$index] == ASN_UNSIGNED64);
$values[$index] = int(rand(2**$exp));
}
}
}
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