# SNMP::Info::Layer3::NetSNMP
# $Id$
#
# Copyright (c) 2008 Bill Fenner
# 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.
package SNMP::Info::Layer3::NetSNMP;
use strict;
use Exporter;
use SNMP::Info::Layer3;
use SNMP::Info::LLDP;
@SNMP::Info::Layer3::NetSNMP::ISA = qw/SNMP::Info::LLDP SNMP::Info::Layer3 Exporter/;
@SNMP::Info::Layer3::NetSNMP::EXPORT_OK = qw//;
use vars qw/$VERSION %GLOBALS %MIBS %FUNCS %MUNGE/;
$VERSION = '3.38';
%MIBS = (
%SNMP::Info::Layer3::MIBS,
%SNMP::Info::LLDP::MIBS,
'UCD-SNMP-MIB' => 'versionTag',
'NET-SNMP-TC' => 'netSnmpAgentOIDs',
'HOST-RESOURCES-MIB' => 'hrSystem',
);
%GLOBALS = (
%SNMP::Info::Layer3::GLOBALS,
%SNMP::Info::LLDP::GLOBALS,
'netsnmp_vers' => 'versionTag',
'hrSystemUptime' => 'hrSystemUptime',
);
%FUNCS = (
%SNMP::Info::Layer3::FUNCS,
%SNMP::Info::LLDP::FUNCS,
);
%MUNGE = (
%SNMP::Info::Layer3::MUNGE,
%SNMP::Info::LLDP::MUNGE,
);
sub vendor {
return 'Net-SNMP';
}
sub os {
my $netsnmp = shift;
my $descr = $netsnmp->description();
return $1 if ( $descr =~ /^(\S+)\s+/ );
return;
}
sub os_ver {
my $netsnmp = shift;
my $descr = $netsnmp->description();
my $vers = $netsnmp->netsnmp_vers();
my $os_ver = undef;
$os_ver = $1 if ( $descr =~ /^\S+\s+\S+\s+(\S+)\s+/ );
if ($vers) {
$os_ver = "???" unless defined($os_ver);
$os_ver .= " / Net-SNMP " . $vers;
}
return $os_ver;
}
sub serial {
return '';
}
# sysUptime gives us the time since the SNMP daemon has restarted,
# so return the system uptime since that's probably what the user
# wants. (Caution: this could cause trouble if using
# sysUptime-based discontinuity timers or other TimeStamp
# objects.
sub uptime {
my $netsnmp = shift;
my $uptime;
$uptime = $netsnmp->hrSystemUptime();
return $uptime if defined $uptime;
return $netsnmp->SUPER::uptime();
}
sub i_ignore {
my $l3 = shift;
my $partial = shift;
my $interfaces = $l3->interfaces($partial) || {};
my %i_ignore;
foreach my $if ( keys %$interfaces ) {
# lo0 etc
if ( $interfaces->{$if} =~ /\blo\d*\b/i ) {
$i_ignore{$if}++;
}
}
return \%i_ignore;
}
1;
__END__
=head1 NAME
SNMP::Info::Layer3::NetSNMP - SNMP Interface to L3 Net-SNMP Devices
=head1 AUTHORS
Bradley Baetz and Bill Fenner
=head1 SYNOPSIS
# Let SNMP::Info determine the correct subclass for you.
my $netsnmp = new SNMP::Info(
AutoSpecify => 1,
Debug => 1,
DestHost => 'myrouter',
Community => 'public',
Version => 2
)
or die "Can't connect to DestHost.\n";
my $class = $netsnmp->class();
print "SNMP::Info determined this device to fall under subclass : $class\n";
=head1 DESCRIPTION
Subclass for Generic Net-SNMP devices
=head2 Inherited Classes
=over
=item SNMP::Info::Layer3
=back
=head2 Required MIBs
=over
=item F<UCD-SNMP-MIB>
=item F<NET-SNMP-TC>
=item F<HOST-RESOURCES-MIB>
=item Inherited Classes' MIBs
See L<SNMP::Info::Layer3> for its own MIB requirements.
See L<SNMP::Info::LLDP> for its own MIB requirements.
=back
=head1 GLOBALS
These are methods that return scalar value from SNMP
=over
=item $netsnmp->vendor()
Returns 'Net-SNMP'.
=item $netsnmp->os()
Returns the OS extracted from C<sysDescr>.
=item $netsnmp->os_ver()
Returns the software version extracted from C<sysDescr>, along
with the Net-SNMP version.
=item $netsnmp->uptime()
Returns the system uptime instead of the agent uptime.
NOTE: discontinuity timers and other Time Stamp based objects
are based on agent uptime, so use orig_uptime().
=item $netsnmp->serial()
Returns ''.
=back
=head2 Globals imported from SNMP::Info::Layer3
See documentation in L<SNMP::Info::Layer3> for details.
=head2 Globals imported from SNMP::Info::LLDP
See documentation in L<SNMP::Info::LLDP> for details.
=head1 TABLE ENTRIES
These are methods that return tables of information in the form of a reference
to a hash.
=head2 Overrides
=over
=item $netsnmp->i_ignore()
Returns reference to hash. Increments value of IID if port is to be ignored.
Ignores loopback
=back
=head2 Table Methods imported from SNMP::Info::Layer3
See documentation in L<SNMP::Info::Layer3> for details.
=head2 Table Methods imported from SNMP::Info::LLDP
See documentation in L<SNMP::Info::LLDP> for details.
=head1 NOTES
In order to cause SNMP::Info to classify your device into this class, it
may be necessary to put a configuration line into your F<snmpd.conf>
similar to
sysobjectid .1.3.6.1.4.1.8072.3.2.N
where N is the object ID for your OS from the C<NET-SNMP-TC> MIB (or
255 if not listed). Some Net-SNMP installations default to an
incorrect return value for C<system.sysObjectId>.
In order to recognize a Net-SNMP device as Layer3, it may be necessary
to put a configuration line similar to
sysservices 76
in your F<snmpd.conf>.
=cut