Initial Import. Ver 0.1
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Max Baker
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Info/Layer2.pm
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263
Info/Layer2.pm
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# SNMP::Info::Layer2 - SNMP Interface to Layer2 Devices
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# Max Baker <max@warped.org>
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#
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# Copyright (c) 2002, 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 notice,
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# this list of conditions and the following disclaimer in the documentation
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# 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" AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package SNMP::Info::Layer2;
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$VERSION = 0.1;
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use strict;
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use Exporter;
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use SNMP::Info;
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use SNMP::Info::Bridge;
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use SNMP::Info::CDP;
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use vars qw/$VERSION $DEBUG %GLOBALS %MIBS %FUNCS %PORTSTAT %MUNGE $INIT/;
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@SNMP::Info::Layer2::ISA = qw/SNMP::Info SNMP::Info::Bridge SNMP::Info::CDP Exporter/;
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@SNMP::Info::Layer2::EXPORT_OK = qw//;
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$DEBUG=0;
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$SNMP::debugging=$DEBUG;
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# See SNMP::Info for the details of these data structures and
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# the interworkings.
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$INIT = 0;
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%MIBS = ( %SNMP::Info::MIBS,
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%SNMP::Info::Bridge::MIBS,
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%SNMP::Info::CDP::MIBS,
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'CISCO-PRODUCTS-MIB' => 'sysName',
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'CISCO-STACK-MIB' => 'wsc1900sysID',
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'HP-ICF-OID' => 'hpSwitch4000',
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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::CDP::GLOBALS,
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);
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%FUNCS = (
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%SNMP::Info::FUNCS,
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%SNMP::Info::Bridge::FUNCS,
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%SNMP::Info::CDP::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::CDP::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);
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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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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 $descr =~ /hp/i) {
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return 'hp';
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}
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if ($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 i_ignore {
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my $l2 = shift;
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my $i_type = $l2->i_type();
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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|propvirtual|other|cpu)/i;
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}
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return \%i_ignore;
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}
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# By Default we'll use the description field
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sub interfaces {
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my $l2 = shift;
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my $interfaces = $l2->i_index();
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my $i_descr = $l2->i_description();
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my $i_name = $l2->i_name();
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my %if;
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foreach my $iid (keys %$interfaces){
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my $port = $i_descr->{$iid};
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my $name = $i_name->{$iid};
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$port = $name if (defined $name and $name !~ /^\s*$/);
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next unless defined $port;
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# Cisco 1900 has a space in some of its port descr.
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# get rid of any weird characters
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$port =~ s/[^\d\/,()\w]+//gi;
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# Translate Cisco 2926,etc. from 1/5 to 1.5
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$port =~ s/\//\./ if ($port =~ /^\d+\/\d+$/);
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$if{$iid} = $port;
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}
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return \%if
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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 - Perl5 Interface to Layer2 network devices.
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=head1 DESCRIPTION
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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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See super classes for descriptions of other available methods.
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Inherits from:
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SNMP::Info
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SNMP::Info::Bridge
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SNMP::Info::CDP
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MIBS:
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CISCO-PRODUCTS-MIB - Needed for ID of Cisco Products
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CISCO-STACK-MIB - Needed for ID of Cisco Products
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HP-ICF-OID - Needed for ID of HP Products
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MIBS listed in SNMP::Info::Bridge and SNMP::Info::CDP
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Cisco MIBs can be found at ftp://ftp.cisco.com/pub/mibs/v2/v2.tar.gz
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HP MIBs can be found at http://www.hp.com/rnd/software
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=head1 AUTHOR
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Max Baker (C<max@warped.org>)
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=head1 SYNOPSIS
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my $l2 = new SNMP::Info::Layer2(DestHost => 'mybridge' ,
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Community => 'public' );
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=head1 CREATING AN OBJECT
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=over
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=item new SNMP::Info::Layer2()
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Arguments passed to new() are passed on to SNMP::Session::new()
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my $l2 = new SNMP::Info::Layer2(
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DestHost => $host,
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Community => 'public',
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Version => 3,...
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)
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die "Couldn't connect.\n" unless defined $l2;
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=item $l2->session()
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Sets or returns the SNMP::Session object
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# Get
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my $sess = $l2->session();
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# Set
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my $newsession = new SNMP::Session(...);
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$l2->session($newsession);
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=back
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=head1 GLOBALS
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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 and HP specific MIBs.
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For HP devices, removes 'hpswitch' from the name
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For Cisco devices, removes 'sysid' from the name
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=item $l2->vendor()
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Trys to discover the vendor from $l2->model() and $l2->vendor()
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=back
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=head1 TABLE ENTRIES
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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 name.
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Defaults to B<ifDescr> but checks and overrides with B<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 B<ifType> of loopback,propvirtual,other, and cpu
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=back
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=cut
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