317 lines
8.1 KiB
Perl
317 lines
8.1 KiB
Perl
# SNMP::Info::Layer2 - SNMP Interface to Layer2 Devices
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# $Id$
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#
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# Copyright (c) 2008 Max Baker -- All changes from Version 0.7 on
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#
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# Copyright (c) 2002,2003 Regents of the University of California
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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::Layer2;
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use strict;
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use Exporter;
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use SNMP::Info;
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use SNMP::Info::Bridge;
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use SNMP::Info::Entity;
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use SNMP::Info::PowerEthernet;
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@SNMP::Info::Layer2::ISA
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= qw/SNMP::Info SNMP::Info::Bridge SNMP::Info::Entity SNMP::Info::PowerEthernet Exporter/;
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@SNMP::Info::Layer2::EXPORT_OK = qw//;
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use vars qw/$VERSION %GLOBALS %MIBS %FUNCS %PORTSTAT %MUNGE/;
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$VERSION = '2.06';
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%MIBS = (
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%SNMP::Info::MIBS, %SNMP::Info::Bridge::MIBS,
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%SNMP::Info::Entity::MIBS, %SNMP::Info::PowerEthernet::MIBS,
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);
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%GLOBALS = (
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%SNMP::Info::GLOBALS,
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%SNMP::Info::Bridge::GLOBALS,
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%SNMP::Info::Entity::GLOBALS,
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%SNMP::Info::PowerEthernet::GLOBALS,
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'serial1' =>
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'.1.3.6.1.4.1.9.3.6.3.0', # OLD-CISCO-CHASSIS-MIB::chassisId.0
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);
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%FUNCS = (
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%SNMP::Info::FUNCS, %SNMP::Info::Bridge::FUNCS,
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%SNMP::Info::Entity::FUNCS, %SNMP::Info::PowerEthernet::FUNCS,
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);
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%MUNGE = (
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# Inherit all the built in munging
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%SNMP::Info::MUNGE,
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%SNMP::Info::Bridge::MUNGE,
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%SNMP::Info::Entity::MUNGE,
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%SNMP::Info::PowerEthernet::MUNGE,
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);
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# Method OverRides
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# $l2->model() - Looks at sysObjectID which gives the oid of the system
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# name, contained in a propriatry MIB.
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sub model {
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my $l2 = shift;
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my $id = $l2->id();
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my $model = &SNMP::translateObj($id) || $id || '';
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# HP
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$model =~ s/^hpswitch//i;
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# Cisco
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$model =~ s/sysid$//i;
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$model =~ s/^(cisco|catalyst)//i;
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$model =~ s/^cat//i;
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return $model;
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}
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sub vendor {
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my $l2 = shift;
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my $model = $l2->model();
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my $descr = $l2->description();
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if ( $model =~ /hp/i or $descr =~ /\bhp\b/i ) {
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return 'hp';
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}
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if ( $model =~ /catalyst/i or $descr =~ /(catalyst|cisco)/i ) {
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return 'cisco';
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}
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}
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sub serial {
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my $l2 = shift;
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my $serial1 = $l2->serial1();
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my $e_descr = $l2->e_descr() || {};
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my $e_serial = $l2->e_serial() || {};
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my $serial2 = $e_serial->{1} || undef;
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my $chassis = $e_descr->{1} || undef;
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# precedence
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# serial2,chassis parse,serial1
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return $serial2 if ( defined $serial2 and $serial2 !~ /^\s*$/ );
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return $1
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if ( defined $chassis and $chassis =~ /serial#?:\s*([a-z0-9]+)/i );
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return $serial1 if ( defined $serial1 and $serial1 !~ /^\s*$/ );
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return;
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}
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sub i_ignore {
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my $l2 = shift;
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my $partial = shift;
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my $i_type = $l2->i_type($partial) || {};
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my %i_ignore = ();
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foreach my $if ( keys %$i_type ) {
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my $type = $i_type->{$if};
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$i_ignore{$if}++
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if $type =~ /(loopback|other|cpu)/i;
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}
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return \%i_ignore;
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}
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sub interfaces {
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my $l2 = shift;
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my $partial = shift;
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my $interfaces = $l2->i_index($partial) || {};
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my $i_descr = $l2->i_description($partial) || {};
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# Replace the Index with the ifDescr field.
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foreach my $iid ( keys %$i_descr ) {
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my $port = $i_descr->{$iid};
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next unless defined $port;
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$interfaces->{$iid} = $port;
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}
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return $interfaces;
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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::Layer2 - SNMP Interface to network devices serving Layer2 only.
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=head1 AUTHOR
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Max Baker
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=head1 SYNOPSIS
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# Let SNMP::Info determine the correct subclass for you.
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my $l2 = new SNMP::Info(
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AutoSpecify => 1,
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Debug => 1,
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DestHost => 'myswitch',
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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 = $l2->class();
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print "SNMP::Info determined this device to fall under subclass : $class\n";
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# Let's get some basic Port information
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my $interfaces = $l2->interfaces();
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my $i_up = $l2->i_up();
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my $i_speed = $l2->i_speed();
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foreach my $iid (keys %$interfaces) {
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my $port = $interfaces->{$iid};
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my $up = $i_up->{$iid};
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my $speed = $i_speed->{$iid}
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print "Port $port is $up. Port runs at $speed.\n";
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}
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=head1 DESCRIPTION
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This class is usually used as a superclass for more specific device classes
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listed under SNMP::Info::Layer2::* Please read all docs under SNMP::Info
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first.
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Provides abstraction to the configuration information obtainable from a
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Layer2 device through SNMP. Information is stored in a number of MIBs.
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For speed or debugging purposes you can call the subclass directly, but not
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after determining a more specific class using the method above.
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my $l2 = new SNMP::Info::Layer2(...);
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=head2 Inherited Classes
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=over
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=item SNMP::Info
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=item SNMP::Info::Bridge
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=item SNMP::Info::Entity
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=back
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=head2 Required MIBs
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=over
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=item Inherited Classes
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MIBs required by the inherited classes listed above.
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=back
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MIBs can be found in netdisco-mibs package.
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=head1 GLOBALS
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These are methods that return scalar value from SNMP
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=head2 Overrides
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=over
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=item $l2->model()
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Cross references $l2->id() with product IDs in the
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Cisco MIBs.
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For HP devices, removes C<'hpswitch'> from the name
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For Cisco devices, removes c<'sysid'> from the name
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=item $l2->vendor()
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Tries to discover the vendor from $l2->model() and $l2->description()
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=item $l2->serial()
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Returns serial number if available through SNMP
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=back
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=head2 Globals imported from SNMP::Info
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See documentation in L<SNMP::Info/"GLOBALS"> for details.
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=head2 Globals imported from SNMP::Info::Bridge
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See documentation in L<SNMP::Info::Bridge/"GLOBALS"> for details.
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=head2 Globals imported from SNMP::Info::Entity
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See documentation in L<SNMP::Info::Entity/"GLOBALS"> for details.
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=head1 TABLE METHODS
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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 $l2->interfaces()
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Creates a map between the interface identifier (iid) and the physical port
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name.
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Defaults to C<ifDescr> but checks and overrides with C<ifName>
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=item $l2->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 ports with C<ifType> of loopback, propvirtual, other, and cpu
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=back
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=head2 Table Methods imported from SNMP::Info
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See documentation in L<SNMP::Info/"TABLE METHODS"> for details.
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=head2 Table Methods imported from SNMP::Info::Bridge
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See documentation in L<SNMP::Info::Bridge/"TABLE METHODS"> for details.
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=head2 Table Methods imported from SNMP::Info::Entity
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See documentation in L<SNMP::Info::Entity/"TABLE METHODS"> for details.
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=cut
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