plugins/tests/check_snmp_agent.pl

   1 #! /usr/bin/perl -w -I ..
   2 #
   3 # Subagent for testing check_snmp
   4 #
   5
   6 #use strict; # Doesn't work
   7 use NetSNMP::OID qw(:all);
   8 use NetSNMP::agent;
   9 use NetSNMP::ASN qw(ASN_OCTET_STR ASN_COUNTER ASN_COUNTER64 ASN_INTEGER ASN_INTEGER64 ASN_UNSIGNED ASN_UNSIGNED64);
  10 #use Math::Int64 qw(uint64); # Skip that module whie we don't need it
  11 sub uint64 { return $_ }
  12
  13 if (!$agent) {
  14         print "This program must run as an embedded NetSNMP agent\n";
  15         exit 1;
  16 }
  17
  18 my $baseoid = '.1.3.6.1.4.1.8072.3.2.67';
  19 # Next are arrays of indexes (Type, initial value and increments)
  20 # Undef miltipliers are randomized
  21 my $multiline = 'Cisco Internetwork Operating System Software
  22 IOS (tm) Catalyst 4000 "L3" Switch Software (cat4000-I9K91S-M), Version
  23 12.2(20)EWA, RELEASE SOFTWARE (fc1)
  24 Technical Support: http://www.cisco.com/techsupport
  25 Copyright (c) 1986-2004 by cisco Systems, Inc.
  26 ';
  27 my $multilin2 = "Kisco Outernetwork Oserating Gystem Totware
  28 Copyleft (c) 2400-2689 by kisco Systrems, Inc.";
  29 my $multilin3 = 'This should not confuse check_snmp "parser"
  30 into thinking there is no 2nd line';
  31 my $multilin4 = 'It\'s getting even harder if the line
  32 ends with with this: C:\\';
  33 my $multilin5 = 'And now have fun with with this: "C:\\"
  34 because we\'re not done yet!';
  35
  36 # 0..15 <---- please update comment when adding/removing fields
  37 my @fields = (ASN_OCTET_STR, ASN_OCTET_STR, ASN_OCTET_STR, ASN_OCTET_STR, ASN_OCTET_STR, ASN_UNSIGNED, ASN_UNSIGNED, ASN_COUNTER, ASN_COUNTER64, ASN_UNSIGNED, ASN_COUNTER, ASN_OCTET_STR, ASN_OCTET_STR, ASN_OCTET_STR, ASN_OCTET_STR, ASN_OCTET_STR );
  38 my @values = ($multiline, $multilin2, $multilin3, $multilin4, $multilin5, 4294965296, 1000, 4294965296, uint64("18446744073709351616"), int(rand(2**32)), 64000, "stringtests", "3.5", "87.4startswithnumberbutshouldbestring", '555"I said"', 'CUSTOM CHECK OK: foo is 12345' );
  39 my @incrts = (undef, undef, undef, undef, undef, 1000, -500, 1000, 100000, undef, 666, undef, undef, undef, undef, undef );
  40
  41 # Number of elements in our OID
  42 my $oidelts;
  43 {
  44         my @oid = split(/\./, $baseoid);
  45         $oidelts = scalar(@oid);
  46 }
  47
  48 my $regoid = new NetSNMP::OID($baseoid);
  49 $agent->register('check_snmp_agent', $regoid, \&my_snmp_handler);
  50
  51 sub my_snmp_handler {
  52         my ($handler, $registration_info, $request_info, $requests) = @_;
  53
  54         for (my $request = $requests; $request; $request = $request->next) {
  55                 my $oid = $request->getOID();
  56                 my $index;
  57                 my $next_index;
  58
  59                 # Validate the OID
  60                 my @numarray = $oid->to_array();
  61                 if (@numarray != $oidelts) {
  62                         if ($request_info->getMode() == MODE_GETNEXT && @numarray == ($oidelts - 1)) {
  63                                 # GETNEXT for the base oid; set it to the first index
  64                                 push(@numarray, 0);
  65                                 $next_index = 0;
  66                         } else {
  67                                 # We got a request for the base OID or with extra elements
  68                                 $request->setError($request_info, SNMP_ERR_NOERROR);
  69                                 next;
  70                         }
  71                 }
  72
  73                 $index = pop(@numarray);
  74                 if ($index >= scalar(@fields)) {
  75                         # Index is out of bounds
  76                         $request->setError($request_info, SNMP_ERR_NOERROR);
  77                         next;
  78                 }
  79
  80                 # Handle the request
  81                 if ($request_info->getMode() == MODE_GETNEXT) {
  82                         if (++$index >= scalar(@fields)) {
  83                                 # Index will grow out of bounds
  84                                 $request->setError($request_info, SNMP_ERR_NOERROR);
  85                                 next;
  86                         }
  87                         $index = (defined($next_index) ? $next_index : $index);
  88                         $request->setOID("$baseoid.$index");
  89                 } elsif ($request_info->getMode() != MODE_GET) {
  90                         # Everything else is write-related modes
  91                         $request->setError($request_info, SNMP_ERR_READONLY);
  92                         next;
  93                 }
  94
  95                 # Set the response... setValue is a bit touchy about the data type, but accepts plain strings.
  96                 my $value = sprintf("%s", $values[$index]);
  97                 $request->setValue($fields[$index], $value);
  98
  99                 # And update the value
 100                 if (defined($incrts[$index])) {
 101                         $values[$index] += $incrts[$index];
 102                 } elsif ($fields[$index] != ASN_OCTET_STR) {
 103                         my $minus = int(rand(2))*-1;
 104                         $minus = 1 unless ($minus);
 105                         my $exp = 32;
 106                         $exp = 64 if ($fields[$index]  == ASN_COUNTER64 || $fields[$index] == ASN_INTEGER64 || $fields[$index] == ASN_UNSIGNED64);
 107                         $values[$index] = int(rand(2**$exp));
 108                 }
 109         }
 110 }
 111