378 lines
9.2 KiB
Perl
378 lines
9.2 KiB
Perl
# SNMP::Info::Layer3 - SNMP Interface to Layer3 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::Layer3;
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$VERSION = 0.1;
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use strict;
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use Exporter;
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use SNMP::Info;
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use SNMP::Info::CDP;
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use SNMP::Info::Bridge;
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use SNMP::Info::EtherLike;
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use vars qw/$VERSION $DEBUG %GLOBALS %FUNCS $INIT %MIBS %MUNGE/;
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@SNMP::Info::Layer3::ISA = qw/SNMP::Info SNMP::Info::CDP SNMP::Info::Bridge SNMP::Info::EtherLike Exporter/;
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@SNMP::Info::Layer3::EXPORT_OK = qw//;
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$DEBUG=0;
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$SNMP::debugging=$DEBUG;
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$INIT = 0;
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%MIBS = ( %SNMP::Info::MIBS,
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%SNMP::Info::CDP::MIBS,
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%SNMP::Info::Bridge::MIBS,
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%SNMP::Info::EtherLike::MIBS,
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'ENTITY-MIB' => 'entPhysicalName',
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'HP-ICF-OID' => 'hpSwitch4000',
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'CISCO-PRODUCTS-MIB' => 'sysName',
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'OSPF-MIB' => 'ospfRouterId',
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);
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%GLOBALS = (
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# Inherit the super class ones
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%SNMP::Info::GLOBALS,
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%SNMP::Info::CDP::GLOBALS,
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%SNMP::Info::Bridge::GLOBALS,
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%SNMP::Info::EtherLike::GLOBALS,
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'mac' => 'ifPhysAddress.1',
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'chassis' => 'entPhysicalDescr.1',
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'router_ip' => 'ospfRouterId.0',
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);
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%FUNCS = (
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%SNMP::Info::FUNCS,
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%SNMP::Info::CDP::FUNCS,
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%SNMP::Info::Bridge::FUNCS,
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%SNMP::Info::EtherLike::FUNCS,
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# IFMIB
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'i_name2' => 'ifName',
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# Address Translation Table (ARP Cache)
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'at_index' => 'atIfIndex',
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'at_paddr' => 'atPhysAddress',
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'at_netaddr' => 'atNetAddress',
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'ospf_ip' => 'ospfHostIpAddress'
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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::CDP::MUNGE,
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%SNMP::Info::Bridge::MUNGE,
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%SNMP::Info::EtherLike::MUNGE,
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'at_paddr' => \&SNMP::Info::munge_mac,
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);
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# Method OverRides
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sub root_ip {
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my $l3 = shift;
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my $router_ip = $l3->router_ip();
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my $ospf_ip = $l3->ospf_ip();
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# return the first one found here (should be only)
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if (defined $ospf_ip and scalar(keys %$ospf_ip)){
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foreach my $key (keys %$ospf_ip){
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my $ip = $ospf_ip->{$key};
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print " SNMP::Layer3::root_ip() using $ip\n" if $DEBUG;
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return $ip;
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}
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}
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return $router_ip if defined $router_ip;
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return undef;
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}
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sub i_ignore {
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my $l3 = shift;
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my $interfaces = $l3->interfaces();
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my %i_ignore;
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foreach my $if (keys %$interfaces) {
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# lo -> cisco aironet 350 loopback
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if ($interfaces->{$if} =~ /(tunnel|loopback|lo|null)/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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sub serial {
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my $l3 = shift;
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my $chassis = $l3->chassis();
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return $1 if (defined $chassis and $chassis =~ /serial#?:\s*([a-z0-9]+)/i);
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}
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# $l3->model() - the sysObjectID returns an IID to an entry in
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# the CISCO-PRODUCT-MIB. Look it up and return it.
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sub model {
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my $l3 = shift;
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my $id = $l3->id();
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my $model = &SNMP::translateObj($id);
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$model =~ s/^cisco//i;
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return $model;
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}
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sub i_name {
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my $l3 = shift;
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my $i_index = $l3->i_index();
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my $i_alias = $l3->i_alias();
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my $i_name2 = $l3->i_name2();
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my %i_name;
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foreach my $iid (keys %$i_name2){
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my $name = $i_name2->{$iid};
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my $alias = $i_alias->{$iid};
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$i_name{$iid} = (defined $alias and $alias !~ /^\s*$/) ?
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$alias :
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$name;
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}
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return \%i_name;
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}
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sub i_duplex {
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my $l3 = shift;
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my $el_index = $l3->el_index();
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my $el_duplex = $l3->el_duplex();
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my %i_index;
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foreach my $el_port (keys %$el_duplex){
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my $iid = $el_index->{$el_port};
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next unless defined $iid;
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my $duplex = $el_duplex->{$el_port};
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next unless defined $duplex;
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$i_index{$iid} = 'half' if $duplex =~ /half/i;
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$i_index{$iid} = 'full' if $duplex =~ /full/i;
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$i_index{$iid} = 'auto' if $duplex =~ /auto/i;
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}
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return \%i_index;
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}
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# $l3->interfaces() - Map the Interfaces to their physical names
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sub interfaces {
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my $l3 = shift;
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my $interfaces = $l3->i_index();
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my $descriptions = $l3->i_description();
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my %interfaces = ();
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foreach my $iid (keys %$interfaces){
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my $desc = $descriptions->{$iid};
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next unless defined $desc;
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$interfaces{$iid} = $desc;
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}
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return \%interfaces;
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}
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sub vendor {
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my $l3 = shift;
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my $descr = $l3->description();
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return 'cisco' if ($descr =~ /(cisco|ios)/i);
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return 'foundry' if ($descr =~ /foundry/i);
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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 - Perl5 Interface to network devices using Layer3
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=head1 DESCRIPTION
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Provides generic methods for accessing SNMP data for Layer 3 network devices.
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Includes support for Layer2+3 devices. See super classes for other inherited
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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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SNMP::Info::EtherLike
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Required MIBs:
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ENTITY-MIB - For model identification
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CISCO-PRODUCTS-MIB - For model identification
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HP-ICF-OID - For model identification
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MIBS listed in SNMP::Info::CDP, SNMP::Info::Bridge, and SNMP::Info::Etherlike
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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 $l3 = new SNMP::Info::Layer3(DestHost => 'router' ,
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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::Layer3()
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Arguments passed to new() are passed on to SNMP::Session::new()
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my $l3 = new SNMP::Info::Layer3(
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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 $l3;
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=item $l3->session()
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Sets or returns the SNMP::Session object
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# Get
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my $sess = $l3->session();
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# Set
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my $newsession = new SNMP::Session(...);
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$l3->session($newsession);
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=back
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=head1 GLOBALS
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=over
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=item $l3->mac()
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Returns root port mac address
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(B<ifPhysAddress.1>)
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=item $l3->chassis()
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Returns Chassis type (model).
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(B<entPhysicalDescr.1>)
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=item $l3->serial()
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Trys to cull a serial number from $l3->chassis()
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=item $l3->model()
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Trys to reference $l3->id() to one of the product MIBs listed above
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Removes 'cisco' from cisco devices for readability.
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=item $l3->vendor()
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Trys to cull a Vendor name from B<sysDescr>
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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 $l3->interfaces()
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Returns the map between SNMP Interface Identifier (iid) and physical port name.
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Only returns those iids that have a description listed in $l3->i_description()
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=item $l3->i_ignore()
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Returns reference to hash. Creates a key for each IID that should be ignored.
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Currently looks for tunnel,loopback,lo,null from $l3->interfaces()
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=item $l3->i_name()
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Returns reference to hash of iid to human set name.
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Defaults to B<ifName>, but checks for an B<ifAlias>
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=item $l3->i_duplex()
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Returns reference to hash of iid to current link duplex setting.
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Maps $l3->el_index() to $l3->el_duplex, then culls out
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full,half, or auto and sets the map to that value.
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see SNMP::Info::Etherlike for the el_index() and el_duplex() methods.
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=back
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=head2 ARP Cache Entries
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=over
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=item $l3->at_index()
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Returns reference to map of IID to Arp Cache Entry
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(B<atIfIndex>)
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=item $l3->at_paddr()
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Returns reference to hash of Arp Cache Entries to MAC address
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(B<atPhysAddress>)
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=item $l3->at_netaddr()
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Returns reference to hash of Arp Cache Entries to IP Address
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(B<atNetAddress>)
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=back
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=cut
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