273 lines
6.5 KiB
Perl
273 lines
6.5 KiB
Perl
# SNMP::Info::Layer3::NetSNMP
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# $Id$
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#
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# Copyright (c) 2008 Bill Fenner
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# * Neither the name of the University of California, Santa Cruz nor the
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# names of its contributors may be used to endorse or promote products
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# derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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# LIABLE FOR # ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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package SNMP::Info::Layer3::NetSNMP;
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use strict;
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use Exporter;
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use SNMP::Info::Layer3;
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use SNMP::Info::LLDP;
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@SNMP::Info::Layer3::NetSNMP::ISA = qw/SNMP::Info::LLDP SNMP::Info::Layer3 Exporter/;
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@SNMP::Info::Layer3::NetSNMP::EXPORT_OK = qw//;
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use vars qw/$VERSION %GLOBALS %MIBS %FUNCS %MUNGE/;
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$VERSION = '3.66';
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%MIBS = (
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%SNMP::Info::Layer3::MIBS,
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%SNMP::Info::LLDP::MIBS,
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'UCD-SNMP-MIB' => 'versionTag',
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'NET-SNMP-TC' => 'netSnmpAliasDomain',
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'HOST-RESOURCES-MIB' => 'hrSystem',
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);
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%GLOBALS = (
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%SNMP::Info::Layer3::GLOBALS,
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%SNMP::Info::LLDP::GLOBALS,
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'netsnmp_vers' => 'versionTag',
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'hrSystemUptime' => 'hrSystemUptime',
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);
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%FUNCS = (
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%SNMP::Info::Layer3::FUNCS,
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%SNMP::Info::LLDP::FUNCS,
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);
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%MUNGE = (
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%SNMP::Info::Layer3::MUNGE,
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%SNMP::Info::LLDP::MUNGE,
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);
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sub vendor {
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return 'Net-SNMP';
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}
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sub os {
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my $netsnmp = shift;
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my $descr = $netsnmp->description();
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return $1 if ( $descr =~ /^(\S+)\s+/ );
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return;
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}
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sub os_ver {
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my $netsnmp = shift;
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my $descr = $netsnmp->description();
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my $vers = $netsnmp->netsnmp_vers();
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my $os_ver = undef;
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$os_ver = $1 if ( $descr =~ /^\S+\s+\S+\s+(\S+)\s+/ );
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if ($vers) {
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$os_ver = "???" unless defined($os_ver);
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$os_ver .= " / Net-SNMP " . $vers;
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}
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return $os_ver;
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}
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sub serial {
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return '';
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}
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# sysUptime gives us the time since the SNMP daemon has restarted,
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# so return the system uptime since that's probably what the user
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# wants. (Caution: this could cause trouble if using
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# sysUptime-based discontinuity timers or other TimeStamp
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# objects.
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sub uptime {
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my $netsnmp = shift;
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my $uptime;
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$uptime = $netsnmp->hrSystemUptime();
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return $uptime if defined $uptime;
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return $netsnmp->SUPER::uptime();
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}
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sub i_ignore {
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my $l3 = shift;
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my $partial = shift;
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my $interfaces = $l3->interfaces($partial) || {};
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my %i_ignore;
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foreach my $if ( keys %$interfaces ) {
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# lo0 etc
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if ( $interfaces->{$if} =~ /\blo\d*\b/i ) {
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$i_ignore{$if}++;
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}
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}
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return \%i_ignore;
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}
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1;
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__END__
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=head1 NAME
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SNMP::Info::Layer3::NetSNMP - SNMP Interface to L3 Net-SNMP Devices
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=head1 AUTHORS
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Bradley Baetz and Bill Fenner
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=head1 SYNOPSIS
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# Let SNMP::Info determine the correct subclass for you.
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my $netsnmp = new SNMP::Info(
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AutoSpecify => 1,
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Debug => 1,
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DestHost => 'myrouter',
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Community => 'public',
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Version => 2
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)
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or die "Can't connect to DestHost.\n";
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my $class = $netsnmp->class();
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print "SNMP::Info determined this device to fall under subclass : $class\n";
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=head1 DESCRIPTION
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Subclass for Generic Net-SNMP devices
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=head2 Inherited Classes
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=over
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=item SNMP::Info::Layer3
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=back
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=head2 Required MIBs
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=over
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=item F<UCD-SNMP-MIB>
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=item F<NET-SNMP-TC>
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=item F<HOST-RESOURCES-MIB>
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=item Inherited Classes' MIBs
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See L<SNMP::Info::Layer3> for its own MIB requirements.
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See L<SNMP::Info::LLDP> for its own MIB requirements.
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=back
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=head1 GLOBALS
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These are methods that return scalar value from SNMP
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=over
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=item $netsnmp->vendor()
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Returns 'Net-SNMP'.
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=item $netsnmp->os()
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Returns the OS extracted from C<sysDescr>.
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=item $netsnmp->os_ver()
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Returns the software version extracted from C<sysDescr>, along
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with the Net-SNMP version.
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=item $netsnmp->uptime()
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Returns the system uptime instead of the agent uptime.
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NOTE: discontinuity timers and other Time Stamp based objects
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are based on agent uptime, so use orig_uptime().
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=item $netsnmp->serial()
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Returns ''.
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=back
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=head2 Globals imported from SNMP::Info::Layer3
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See documentation in L<SNMP::Info::Layer3> for details.
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=head2 Globals imported from SNMP::Info::LLDP
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See documentation in L<SNMP::Info::LLDP> for details.
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=head1 TABLE ENTRIES
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These are methods that return tables of information in the form of a reference
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to a hash.
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=head2 Overrides
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=over
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=item $netsnmp->i_ignore()
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Returns reference to hash. Increments value of IID if port is to be ignored.
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Ignores loopback
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=back
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=head2 Table Methods imported from SNMP::Info::Layer3
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See documentation in L<SNMP::Info::Layer3> for details.
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=head2 Table Methods imported from SNMP::Info::LLDP
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See documentation in L<SNMP::Info::LLDP> for details.
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=head1 NOTES
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In order to cause SNMP::Info to classify your device into this class, it
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may be necessary to put a configuration line into your F<snmpd.conf>
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similar to
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sysobjectid .1.3.6.1.4.1.8072.3.2.N
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where N is the object ID for your OS from the C<NET-SNMP-TC> MIB (or
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255 if not listed). Some Net-SNMP installations default to an
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incorrect return value for C<system.sysObjectId>.
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In order to recognize a Net-SNMP device as Layer3, it may be necessary
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to put a configuration line similar to
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sysservices 76
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in your F<snmpd.conf>.
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=cut
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