#!/usr/bin/perl
#
# make_snmpdata.pl
#
# Copyright (c) 2012 Eric Miller
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of the University of California, Santa Cruz nor the
# names of its contributors may be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR # ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
use strict;
use warnings;
use Carp;
use Getopt::Long;
use Pod::Usage;
use SNMP;
local $| = 1;
my $mibdirs = ['/usr/local/share/snmp/mibs'];
my $comm = 'public';
my $ver = '2c';
my $dev;
my $ignore = 0;
my $help = 0;
GetOptions(
'community=s' => \$comm,
'device=s' => \$dev,
'ignore' => \$ignore,
'mibdir=s' => \$mibdirs,
'version' => \$ver,
'help|?' => sub { pod2usage(2); },
) or pod2usage(2);
unless ( defined $dev && $ver =~ /[1|2c]/ ) {
pod2usage(1);
}
local $ENV{'SNMPCONFPATH'} = '' if $ignore;
local $ENV{'MIBDIRS'} = "$mibdirs" if $ignore;
SNMP::addMibDirs($mibdirs);
# Connect to Device
my $sess = SNMP::Session->new(
'UseEnums' => 1,
'RetryNoSuch' => 1,
'DestHost' => $dev,
'Community' => $comm,
'Version' => $ver,
'UseSprintValue' => 1
);
my $sysdescr = $sess->get('sysDescr.0');
unless ( defined $sysdescr ) {
die "Couldn't connect to $dev via snmp.\n";
}
SNMP::loadModules(@ARGV);
# Create a hash of MIB Modules for which we want results
my %mib_hash = map {$_ => 1} @ARGV;
# Add the common MIB Modules we always want
my @common_mibs = ('SNMPv2-MIB', 'IF-MIB');
foreach my $mib (@common_mibs) {
$mib_hash{$mib} = 1;
}
foreach my $key ( sort( keys %SNMP::MIB ) ) {
my $module = $SNMP::MIB{$key}{moduleID} || '';
# IMPORTS pulls in many modules we don't want to walk
# Only walk those we've specified
next unless (defined $mib_hash{$module});
my $access = $SNMP::MIB{$key}{'access'} || '';
next unless ( $access =~ /Read|Create/x );
my $label = SNMP::translateObj( $key, 0, 1 ) || '';
snmpwalk($label);
}
sub snmpwalk {
return unless defined $sess;
my $label = shift;
my $var = SNMP::Varbind->new( [$label] );
my $e = 0;
my $last_iid = '';
my %seen = ();
while ( !$e ) {
$sess->getnext($var);
$e = $sess->{ErrorNum};
return if $var->[0] ne $label;
my $iid = $var->[1];
my $val = $var->[2];
return unless defined $iid;
# Check to see if we've already seen this IID (looping)
if ( defined $seen{$iid} and $seen{$iid} ) {
warn "Looping on $label iid:$iid. Skipped.\n";
return;
}
else { $seen{$iid}++; }
# why is it looping?
return if $last_iid eq $iid;
$last_iid = $iid;
my $line = "$label.$iid = $val";
print "$line\n";
}
return;
}
__END__
=head1 NAME
make_snmpdata.pl - Tool to get SNMP data for the SNMP::Info testing framework
=head1 AUTHOR
Eric Miller
=head1 SYNOPSIS
make_snmpdata.pl [options] MIB-MODULE-1 MIB-MODULE-2
Options:
-community SNMP Community
-device IP Address to query
-ignore Ignore Net-SNMP configuration file
-mibdir Directory containing MIB Files
-version SNMP version to use
-help Brief help message
=head1 OPTIONS
=over 8
=item B<-community>
SNMP Community, either 1 or 2c. Defaults to version 2c
-community 2c
=item B<-device>
IP Address to query for the SNMP data. No default and a mandatory option.
-device 127.0.0.1
=item B<-ignore >
Ignore Net-SNMP configuration file snmp.conf. If this used mibdirs must be
provided
-ignore
=item B<-mibdir>
Directory containing MIB Files. Mutiple directories should be separated by a
colon ':'. Defaults to /usr/local/share/snmp/mibs.
-mibdir /usr/local/share/snmp/mibs/rfc:/usr/local/share/snmp/mibs/net-snmp
=item B<-version>
SNMP version to use. Only version 1 and 2c are supported. Defaults to 2c
-version 2c
=item B<-help>
Print help message and exits.
=back
=head1 DESCRIPTION
B<make_snmpdata.pl> will gather SNMP data by walking specified MIB files and
output the data to a file which can be used by the SNMP::Info testing
framework.
=cut