a98e163c7c
qb_fw_mac, qb_fw_port, qb_fw_status. These can be used directly in place of fw_mac, fw_port, fw_status for devices that only populate dot1qFdbTable and not dot1dFdbTable.
656 lines
18 KiB
Perl
656 lines
18 KiB
Perl
# SNMP::Info::Bridge
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# Max Baker
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#
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# Changes since Version 0.7 Copyright (c) 2004 Max Baker
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# All rights reserved.
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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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#
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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::Bridge;
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$VERSION = '1.05';
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# $Id$
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use strict;
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use Exporter;
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use SNMP::Info;
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use vars qw/$VERSION $DEBUG %MIBS %FUNCS %GLOBALS %MUNGE $INIT/;
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@SNMP::Info::Bridge::ISA = qw/SNMP::Info Exporter/;
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@SNMP::Info::Bridge::EXPORT_OK = qw//;
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%MIBS = ('BRIDGE-MIB' => 'dot1dBaseBridgeAddress',
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'Q-BRIDGE-MIB' => 'dot1qPvid',
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);
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%GLOBALS = (
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'b_mac' => 'dot1dBaseBridgeAddress',
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'b_ports' => 'dot1dBaseNumPorts',
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'b_type' => 'dot1dBaseType',
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# Spanning Tree Protocol
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'stp_ver' => 'dot1dStpProtocolSpecification',
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'stp_time' => 'dot1dStpTimeSinceTopologyChange',
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'stp_root' => 'dot1dStpDesignatedRoot',
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# Q-BRIDGE-MIB
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'qb_vlans_max' => 'dot1qMaxSupportedVlans',
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'qb_vlans' => 'dot1qNumVlans',
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'qb_next_vlan_index' => 'dot1qNextFreeLocalVlanIndex',
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);
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%FUNCS = (
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# Forwarding Table: Dot1dTpFdbEntry
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'fw_mac' => 'dot1dTpFdbAddress',
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'fw_port' => 'dot1dTpFdbPort',
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'fw_status' => 'dot1dTpFdbStatus',
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# Bridge Port Table: Dot1dBasePortEntry
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'bp_index' => 'dot1dBasePortIfIndex',
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'bp_port' => 'dot1dBasePortCircuit',
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# Bridge Static (Destination-Address Filtering) Database
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'bs_mac' => 'dot1dStaticAddress',
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'bs_port' => 'dot1dStaticReceivePort',
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'bs_to' => 'dot1dStaticAllowedToGoTo',
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'bs_status' => 'dot1dStaticStatus',
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# Spanning Tree Protocol Table : dot1dStpPortTable
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'stp_p_id' => 'dot1dStpPort',
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'stp_p_priority' => 'dot1dStpPortPriority',
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'stp_p_state' => 'dot1dStpPortState',
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'stp_p_cost' => 'dot1dStpPortPathCost',
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'stp_p_root' => 'dot1dStpPortDesignatedRoot',
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'stp_p_bridge' => 'dot1dStpPortDesignatedBridge',
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'stp_p_port' => 'dot1dStpPortDesignatedPort',
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# Q-BRIDGE-MIB : dot1qPortVlanTable
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'qb_i_vlan' => 'dot1qPvid',
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'qb_i_vlan_type' => 'dot1qPortAcceptableFrameTypes',
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'qb_i_vlan_in_flt' => 'dot1qPortIngressFiltering',
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# Q-BRIDGE-MIB : dot1qVlanStaticTable
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'qb_v_name' => 'dot1qVlanStaticName',
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'qb_v_egress' => 'dot1qVlanStaticEgressPorts',
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'qb_v_fbdn_egress' => 'dot1qVlanForbiddenEgressPorts',
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'qb_v_untagged' => 'dot1qVlanStaticUntaggedPorts',
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'qb_v_stat' => 'dot1qVlanStaticRowStatus',
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# VLAN Forwarding Table: Dot1qTpFdbEntry
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'qb_fw_port' => 'dot1qTpFdbPort',
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'qb_fw_status' => 'dot1qTpFdbStatus',
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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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# Add ones for our class
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'b_mac' => \&SNMP::Info::munge_mac,
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'fw_mac' => \&SNMP::Info::munge_mac,
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'bs_mac' => \&SNMP::Info::munge_mac,
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'stp_root' => \&SNMP::Info::munge_mac,
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'stp_p_root' => \&SNMP::Info::munge_mac,
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'stp_p_bridge' => \&SNMP::Info::munge_mac,
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'stp_p_port' => \&SNMP::Info::munge_mac
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);
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# break up the Dot1qTpFdbEntry INDEX into FDB ID and MAC Address.
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sub _qb_fdbtable_index {
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my $idx = shift;
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my @values = split(/\./, $idx);
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my $fdb_id = shift(@values);
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return ($fdb_id, join(':',map { sprintf "%02x",$_ } @values));
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}
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sub qb_fw_mac {
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my $bridge = shift;
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my $qb_fw_port = $bridge->qb_fw_port();
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my $qb_fw_mac = {};
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foreach my $idx (keys %$qb_fw_port) {
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my($fdb_id, $mac) = _qb_fdbtable_index($idx);
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$qb_fw_mac->{$idx} = $mac;
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}
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$qb_fw_mac;
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}
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sub qb_i_vlan_t {
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my $bridge = shift;
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my $qb_i_vlan = $bridge->qb_i_vlan();
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my $qb_i_vlan_type = $bridge->qb_i_vlan_type();
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my $i_vlan = {};
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foreach my $if (keys %$qb_i_vlan){
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my $vlan = $qb_i_vlan->{$if};
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my $tagged = $qb_i_vlan_type->{$if} || '';
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next unless defined $vlan;
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$i_vlan->{$if} = $tagged eq 'admitOnlyVlanTagged' ? 'trunk' : $vlan;
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}
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return $i_vlan;
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}
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sub i_stp_state {
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my $bridge = shift;
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my $bp_index = $bridge->bp_index();
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my $stp_p_state = $bridge->stp_p_state();
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my %i_stp_state;
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foreach my $index (keys %$stp_p_state){
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my $state = $stp_p_state->{$index};
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my $iid = $bp_index->{$index};
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next unless defined $iid;
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next unless defined $state;
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$i_stp_state{$iid}=$state;
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}
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return \%i_stp_state;
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}
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sub i_stp_port {
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my $bridge = shift;
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my $bp_index = $bridge->bp_index();
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my $stp_p_port = $bridge->stp_p_port();
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my %i_stp_port;
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foreach my $index (keys %$stp_p_port){
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my $bridge = $stp_p_port->{$index};
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my $iid = $bp_index->{$index};
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next unless defined $iid;
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next unless defined $bridge;
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$i_stp_port{$iid}=$bridge;
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}
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return \%i_stp_port;
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}
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sub i_stp_id {
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my $bridge = shift;
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my $bp_index = $bridge->bp_index();
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my $stp_p_id = $bridge->stp_p_id();
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my %i_stp_id;
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foreach my $index (keys %$stp_p_id){
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my $bridge = $stp_p_id->{$index};
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my $iid = $bp_index->{$index};
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next unless defined $iid;
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next unless defined $bridge;
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$i_stp_id{$iid}=$bridge;
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}
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return \%i_stp_id;
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}
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sub i_stp_bridge {
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my $bridge = shift;
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my $bp_index = $bridge->bp_index();
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my $stp_p_bridge = $bridge->stp_p_bridge();
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my %i_stp_bridge;
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foreach my $index (keys %$stp_p_bridge){
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my $bridge = $stp_p_bridge->{$index};
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my $iid = $bp_index->{$index};
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next unless defined $iid;
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next unless defined $bridge;
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$i_stp_bridge{$iid}=$bridge;
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}
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return \%i_stp_bridge;
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}
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#
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# These are internal methods and are not documented. Do not use directly.
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#
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sub check_forbidden_ports {
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my $bridge = shift;
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my ($vlan_id, $ifindex) = @_;
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return undef unless ($vlan_id =~ /\d+/ and $ifindex =~ /\d+/);
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my $iv_forbidden = $bridge->qb_v_fbdn_egress($vlan_id);
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my @forbidden_ports = split(//, unpack("B*", $iv_forbidden->{$vlan_id}));
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print "Forbidden ports: @forbidden_ports\n" if $bridge->debug();
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if ( defined($forbidden_ports[$ifindex]) and ($forbidden_ports[$ifindex] eq "1")) {
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print "Error: IfIndex: $ifindex in forbidden list for VLAN: $vlan_id unable to add\n" if $bridge->debug();
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return undef;
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}
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return 1;
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}
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sub add_to_egress_portlist {
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my $bridge = shift;
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my ($vlan_id, $ifindex) = @_;
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return undef unless ($vlan_id =~ /\d+/ and $ifindex =~ /\d+/);
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my $iv_members = $bridge->qb_v_egress($vlan_id);
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my @egress_list = split(//, unpack("B*", $iv_members->{$vlan_id}));
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print "Original egress list for VLAN: $vlan_id: @egress_list \n" if $bridge->debug();
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$egress_list[$ifindex] = '1';
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# Some devices do not populate the portlist with all possible ports.
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# If we have lengthened the list fill all undefined elements with zero.
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foreach my $item (@egress_list) {
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$item = '0' unless (defined($item));
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}
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print "Modified egress list for VLAN: $vlan_id: @egress_list \n" if $bridge->debug();
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my $new_egress = pack("B*", join('', @egress_list));
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my $egress_rv = $bridge->set_qb_v_egress($new_egress, $vlan_id);
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unless ($egress_rv) {
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print "Error: Unable to add VLAN: $vlan_id to IfIndex: $ifindex egress list\n" if $bridge->debug();
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return undef;
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}
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return 1;
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}
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sub remove_from_egress_portlist {
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my $bridge = shift;
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my ($vlan_id, $ifindex) = @_;
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return undef unless ($vlan_id =~ /\d+/ and $ifindex =~ /\d+/);
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my $iv_members = $bridge->qb_v_egress($vlan_id);
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my @egress_list = split(//, unpack("B*", $iv_members->{$vlan_id}));
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print "Original egress list for VLAN: $vlan_id: @egress_list \n" if $bridge->debug();
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# Some devices may remove automatically, so check state before set
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if ( defined($egress_list[$ifindex]) and ($egress_list[$ifindex] eq "1")) {
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$egress_list[$ifindex] = '0';
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print "Modified egress list for VLAN: $vlan_id: @egress_list \n" if $bridge->debug();
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my $new_egress = pack("B*", join('', @egress_list));
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my $egress_rv = $bridge->set_qb_v_egress($new_egress, $vlan_id);
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unless ($egress_rv) {
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print "Warning: Unable to remove IfIndex: $ifindex from VLAN: $vlan_id egress list\n" if $bridge->debug();
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return undef;
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}
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}
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return 1;
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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::Bridge - SNMP Interface to SNMP data available through the
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BRIDGE-MIB (RFC1493)
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=head1 AUTHOR
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Max Baker
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=head1 SYNOPSIS
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my $bridge = new SNMP::Info (
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AutoSpecify => 1,
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Debug => 1,
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DestHost => 'switch',
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Community => 'public',
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Version => 2
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);
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my $class = $bridge->class();
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print " Using device sub class : $class\n";
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# Grab Forwarding Tables
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my $interfaces = $bridge->interfaces();
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my $fw_mac = $bridge->fw_mac();
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my $fw_port = $bridge->fw_port();
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my $bp_index = $bridge->bp_index();
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foreach my $fw_index (keys %$fw_mac){
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my $mac = $fw_mac->{$fw_index};
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my $bp_id = $fw_port->{$fw_index};
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my $iid = $bp_index->{$bp_id};
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my $port = $interfaces->{$iid};
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print "Port:$port forwarding to $mac\n";
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}
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=head1 DESCRIPTION
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BRIDGE-MIB is used by most Layer 2 devices, and holds information like the
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MAC Forwarding Table and Spanning Tree Protocol info.
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Q-BRIDGE-MIB holds 802.11q information -- VLANs and Trunking. Cisco tends not
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to use this MIB, but some proprietary ones. HP and some nicer vendors use
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this. This is from C<RFC2674_q>.
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Create or use a subclass of SNMP::Info that inherits this class. Do not use directly.
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For debugging you can call new() directly as you would in SNMP::Info
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my $bridge = new SNMP::Info::Bridge(...);
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=head2 Inherited Classes
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None.
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=head2 Required MIBs
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=over
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=item BRIDGE-MIB
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=item Q-BRIDGE-MIB
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F<rfc2674_q.mib>
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=back
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BRIDGE-MIB needs to be extracted from ftp://ftp.cisco.com/pub/mibs/v1/v1.tar.gz
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=head1 GLOBAL METHODS
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These are methods that return scalar values from SNMP
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=over
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=item $bridge->b_mac()
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Returns the MAC Address of the root bridge port
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(B<dot1dBaseBridgeAddress>)
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=item $bridge->b_ports()
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Returns the number of ports in device
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(B<dot1dBaseNumPorts>)
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=item $bridge->b_type()
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Returns the type of bridging this bridge can perform, transparent and/or
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sourceroute.
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(B<dot1dBaseType>)
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=item $bridge->stp_ver()
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Returns what version of STP the device is running. Either decLb100 or ieee8021d.
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(B<dot1dStpProtocolSpecification>)
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=item $bridge->stp_time()
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Returns time since last topology change detected. (100ths/second)
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(B<dot1dStpTimeSinceTopologyChange>)
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=item $bridge->stp_root()
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Returns root of STP.
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(B<dot1dStpDesignatedRoot>)
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=item $bridge->qb_vlans_max()
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Maximum number of VLANS supported on this device.
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(B<dot1qMaxSupportedVlans>)
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=item $bridge->qb_vlans()
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Current number of VLANs that are configured in this device.
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(B<dot1qNumVlans>)
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=item $bridge->qb_next_vlan_index()
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The next available value for B<dot1qVlanIndex> of a local VLAN entry in
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B<dot1qVlanStaticTable>
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(B<dot1qNextFreeLocalVlanIndex>)
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=back
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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 Forwarding Table (dot1dTpFdbEntry)
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=over
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=item $bridge->fw_mac()
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Returns reference to hash of forwarding table MAC Addresses
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(B<dot1dTpFdbAddress>)
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=item $bridge->fw_port()
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Returns reference to hash of forwarding table entries port interface
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identifier (iid)
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(B<dot1dTpFdbPort>)
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=item $bridge->fw_status()
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Returns reference to hash of forwading table entries status
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(B<dot2dTpFdbStatus>)
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=back
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=head2 Bridge Port Table (dot1dBasePortEntry)
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=over
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=item $bridge->bp_index()
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Returns reference to hash of bridge port table entries map back to interface
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identifier (iid)
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(B<dot1dBasePortIfIndex>)
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=item $bridge->bp_port()
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Returns reference to hash of bridge port table entries for a port which
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(potentially) has the same value of B<dot1dBasePortIfIndex> as another port
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on the same bridge, this object contains the name of an object instance unique
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to this port.
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(B<dot1dBasePortCircuit>)
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=back
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=head2 Spanning Tree Protocol Table (dot1dStpPortTable)
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Descriptions are lifted straight from F<BRIDGE-MIB.my>
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=over
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=item $bridge->stp_p_id()
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"The port number of the port for which this entry contains Spanning Tree
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Protocol management information."
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(B<dot1dStpPort>)
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=item $bridge->stp_p_priority()
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"The value of the priority field which is contained in the first
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(in network byte order) octet of the (2 octet long) Port ID. The other octet
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of the Port ID is given by the value of dot1dStpPort."
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(B<dot1dStpPortPriority>)
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=item $bridge->stp_p_state()
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"The port's current state as defined by application of the Spanning Tree
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Protocol. This state controls what action a port takes on reception of a
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frame. If the bridge has detected a port that is malfunctioning it will place
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that port into the broken(6) state. For ports which are disabled
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(see dot1dStpPortEnable), this object will have a value of disabled(1)."
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disabled(1)
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blocking(2)
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listening(3)
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learning(4)
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forwarding(5)
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broken(6)
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(B<dot1dStpPortState>)
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=item $bridge->stp_p_cost()
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"The contribution of this port to the path cost of paths towards the spanning
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|
tree root which include this port. 802.1D-1990 recommends that the default
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|
value of this parameter be in inverse proportion to the speed of the attached
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|
LAN."
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(B<dot1dStpPortPathCost>)
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=item $bridge->stp_p_root()
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|
|
"The unique Bridge Identifier of the Bridge recorded as the Root in the
|
|
Configuration BPDUs transmitted by the Designated Bridge for the segment to
|
|
which the port is attached."
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(B<dot1dStpPortDesignatedRoot>)
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=item $bridge->stp_p_bridge()
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|
|
|
"The Bridge Identifier of the bridge which this port considers to be the
|
|
Designated Bridge for this port's segment."
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(B<dot1dStpPortDesignatedBridge>)
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|
|
|
=item $bridge->stp_p_port()
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|
|
|
(B<dot1dStpPortDesignatedPort>)
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|
|
|
"The Port Identifier of the port on the Designated Bridge for this port's
|
|
segment."
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|
|
|
=item $bridge->i_stp_port()
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|
|
|
Returns the mapping of (B<dot1dStpPortDesignatedPort>) to the interface
|
|
index (iid).
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|
=item $bridge->i_stp_id()
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|
|
|
Returns the mapping of (B<dot1dStpPort>) to the interface index (iid).
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|
|
|
=item $bridge->i_stp_bridge()
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|
|
|
Returns the mapping of (B<dot1dStpPortDesignatedBridge>) to the interface
|
|
index (iid).
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|
|
|
=back
|
|
|
|
=head2 Q-BRIDGE Port VLAN Table (dot1qPortVlanTable)
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|
|
|
=over
|
|
|
|
=item $bridge->qb_i_vlan()
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|
|
|
The PVID, the VLAN ID assigned to untagged frames or Priority-Tagged frames
|
|
received on this port.
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|
|
|
(B<dot1qPvid>)
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|
|
|
=item $bridge->qb_i_vlan_type()
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|
|
|
Either C<admitAll> or C<admitOnlyVlanTagged>. This is a good spot to find
|
|
trunk ports.
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|
|
|
(B<dot1qPortAcceptableFrameTypes>)
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|
|
|
=item $bridge->qb_i_vlan_in_flt()
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|
|
|
When this is C<true> the device will discard incoming frames for VLANs which
|
|
do not include this Port in its Member set. When C<false>, the port will
|
|
accept all incoming frames.
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|
|
|
(B<dot1qPortIngressFiltering>)
|
|
|
|
=back
|
|
|
|
=head2 Q-BRIDGE VLAN Static Table (dot1qVlanStaticTable)
|
|
|
|
=over
|
|
|
|
=item $bridge->qb_v_name()
|
|
|
|
Human-entered name for vlans.
|
|
|
|
(B<dot1qVlanStaticName>)
|
|
|
|
=item $bridge->qb_v_egress()
|
|
|
|
The set of ports which are assigned to the egress list for this VLAN.
|
|
|
|
(B<dot1qVlanStaticEgressPorts>)
|
|
|
|
=item $bridge->qb_v_fbdn_egress()
|
|
|
|
The set of ports which are prohibited from being included in the egress list
|
|
for this VLAN.
|
|
|
|
(B<dot1qVlanForbiddenEgressPorts>)
|
|
|
|
=item $bridge->qb_v_untagged()
|
|
|
|
The set of ports which should transmit egress packets for this VLAN as
|
|
untagged.
|
|
|
|
(B<dot1qVlanStaticUntaggedPorts>)
|
|
|
|
=item $bridge->qb_v_stat()
|
|
|
|
uhh. C<active> !
|
|
|
|
(B<dot1qVlanStaticRowStatus>)
|
|
|
|
=back
|
|
|
|
=head2 Q-BRIDGE Filtering Database Table (dot1qFdbTable)
|
|
|
|
=over
|
|
|
|
=item $bridge->qb_fw_mac()
|
|
|
|
Returns reference to hash of forwarding table MAC Addresses
|
|
|
|
(B<dot1qTpFdbAddress>)
|
|
|
|
=item $bridge->qb_fw_port()
|
|
|
|
Returns reference to hash of forwarding table entries port interface
|
|
identifier (iid)
|
|
|
|
(B<dot1qTpFdbPort>)
|
|
|
|
=item $bridge->qb_fw_status()
|
|
|
|
Returns reference to hash of forwading table entries status
|
|
|
|
(B<dot1qTpFdbStatus>)
|
|
|
|
=back
|
|
|
|
=cut
|