# SNMP::Info::Layer2::Catalyst
#
# Copyright (c) 2002,2003 Regents of the University of California
# Copyright (c) 2008 Max Baker changes from version 0.8 and beyond
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#     * Redistributions of source code must retain the above copyright notice,
#       this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * Neither the name of the University of California, Santa Cruz nor the
#       names of its contributors may be used to endorse or promote products
#       derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR # ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.

package SNMP::Info::Layer2::Catalyst;

use strict;
use warnings;
use Exporter;
use SNMP::Info::CiscoStack;
use SNMP::Info::Layer2::Cisco;

@SNMP::Info::Layer2::Catalyst::ISA
    = qw/SNMP::Info::CiscoStack SNMP::Info::Layer2::Cisco Exporter/;
@SNMP::Info::Layer2::Catalyst::EXPORT_OK = qw//;

our ($VERSION, %GLOBALS, %MIBS, %FUNCS, %MUNGE);

$VERSION = '3.975000';

%MIBS = (
    %SNMP::Info::Layer2::Cisco::MIBS,
    %SNMP::Info::CiscoStack::MIBS,
);

%GLOBALS = (
    %SNMP::Info::Layer2::Cisco::GLOBALS,
    %SNMP::Info::CiscoStack::GLOBALS,
);

%FUNCS = (
    %SNMP::Info::Layer2::Cisco::FUNCS,
    %SNMP::Info::CiscoStack::FUNCS,
);

%MUNGE = (
    %SNMP::Info::Layer2::Cisco::MUNGE,
    %SNMP::Info::CiscoStack::MUNGE,
);

# Overridden Methods

# i_physical sets a hash entry as true if the iid is a physical port
sub i_physical {
    my $cat = shift;

    my $p_port = $cat->p_port() || {};

    my %i_physical;
    foreach my $port ( keys %$p_port ) {
        my $iid = $p_port->{$port};
        $i_physical{$iid} = 1;
    }
    return \%i_physical;
}

sub vendor {
    return 'cisco';
}

sub os {
    return 'catalyst';
}

sub os_ver {
    my $cat    = shift;
    my $os_ver = $cat->SUPER::os_ver();
    return $os_ver if defined $os_ver;

    my $m_swver = $cat->m_swver();
    return unless defined $m_swver;

    # assume .1 entry is the chassis and the sw version we want.
    return $m_swver->{1} if defined $m_swver->{1};
    return;
}

# Workaround for incomplete bp_index
sub bp_index {
    my $cat     = shift;
    my $p_index = $cat->p_port() || {};
    my $b_index = $cat->p_oidx() || {};

    my %bp_index;
    foreach my $iid ( keys %$p_index ) {
        my $ifidx = $p_index->{$iid};
        next unless defined $ifidx;
        my $bpidx = $b_index->{$iid} || 0;

        $bp_index{$bpidx} = $ifidx;
    }
    return \%bp_index;
}

sub cisco_comm_indexing {
    return 1;
}

sub interfaces {
    my $cat     = shift;
    my $partial = shift;

    my $i_index   = $cat->i_index($partial);
    my $portnames = $cat->p_port() || {};
    my %portmap   = reverse %$portnames;

    my %interfaces = ();
    foreach my $iid ( keys %$i_index ) {
        next unless defined $iid;
        my $if   = $i_index->{$iid};
        $if =~ s/\./\// if $if;
        my $port = $portmap{$iid};
        $port =~ s/\./\// if $port;
        $interfaces{$iid} = $port || $if;
    }
    return \%interfaces;
}

sub i_name {
    my $cat     = shift;
    my $partial = shift;

    my $p_port = $cat->p_port() || {};
    my $p_name = $cat->p_name() || {};

    my %i_name;
    foreach my $port ( keys %$p_name ) {
        my $iid = $p_port->{$port};
        next unless defined $iid;
        next if ( defined $partial and $iid !~ /^$partial$/ );
        $i_name{$iid} = $p_name->{$port};
    }
    return \%i_name;
}

1;
__END__

=head1 NAME

SNMP::Info::Layer2::Catalyst - SNMP Interface to Cisco Catalyst devices
running Catalyst OS.

=head1 AUTHOR

Max Baker

=head1 SYNOPSIS

 # Let SNMP::Info determine the correct subclass for you.
 my $cat = new SNMP::Info(
                          AutoSpecify => 1,
                          Debug       => 1,
                          DestHost    => 'myswitch',
                          Community   => 'public',
                          Version     => 2
                        )
    or die "Can't connect to DestHost.\n";

 my $class      = $cat->class();
 print "SNMP::Info determined this device to fall under subclass : $class\n";

=head1 DESCRIPTION

SNMP::Info subclass to provide information for Cisco Catalyst series switches
running CatOS.

This class includes the Catalyst 2920, 4000, 5000, 6000 (hybrid mode)
families.

This subclass is not for all devices that have the name Catalyst.  Note that
some Catalyst switches run IOS, like the 2900 and 3550 families.  Cisco
Catalyst 1900 switches use their own MIB and have a separate subclass.  Use
the method above to have SNMP::Info determine the appropriate subclass before
using this class directly.

See SNMP::Info::device_type() for specifics.

Note:  Some older Catalyst switches will only talk SNMP version 1.  Some
newer ones will not return all their data if connected via Version 1.

For speed or debugging purposes you can call the subclass directly, but not
after determining a more specific class using the method above.

 my $cat = new SNMP::Info::Layer2::Catalyst(...);

=head2 Inherited Classes

=over

=item SNMP::Info::Layer2::Cisco

=item SNMP::Info::CiscoStack

=back

=head2 Required MIBs

=over

=item Inherited Classes' MIBs

See L<SNMP::Info::Layer2::Cisco/"Required MIBs"> for its own MIB requirements.

See L<SNMP::Info::CiscoStack/"Required MIBs"> for its own MIB requirements.

=back

These MIBs are found in the standard v2 MIBs from Cisco.

=head1 GLOBALS

These are methods that return scalar value from SNMP

=over

=item $cat->os()

Returns 'catalyst'

=item $cat->os_ver()

Tries to use the value from SNMP::Info::CiscoStats->os_ver() and if it fails
it grabs $cat->m_swver()->{1} and uses that.

=item $cat->vendor()

Returns 'cisco'

=item $cat->cisco_comm_indexing()

Returns 1.  Use vlan indexing.

=back

=head2 Global Methods imported from SNMP::Info::Layer2::Cisco

See documentation in L<SNMP::Info::Layer2::Cisco/"GLOBALS"> for details.

=head2 Global Methods imported from SNMP::Info::CiscoStack

See documentation in L<SNMP::Info::CiscoStack/"GLOBALS"> for details.

=head1 TABLE METHODS

These are methods that return tables of information in the form of a reference
to a hash.

=head2 Overrides

=over

=item $cat->interfaces()

Returns the map between SNMP Interface Identifier (iid) and physical port
name.

=item $cat->i_name()

Returns reference to hash of iid to human set name.

C<portName>

=item $cat->i_physical()

Returns a map to IID for ports that are physical ports, not vlans, etc.

=item $cat->bp_index()

Returns reference to hash of bridge port table entries map back to interface
identifier (iid)

Crosses (C<portCrossIndex>) to (C<portIfIndex>) since some devices seem to
have problems with F<BRIDGE-MIB>

=back

=head2 Table Methods imported from SNMP::Info::Layer2::Cisco

See documentation in L<SNMP::Info::Layer2::Cisco/"TABLE METHODS"> for details.

=head2 Table Methods imported from SNMP::Info::CiscoStack

See documentation in L<SNMP::Info::CiscoStack/"TABLE METHODS"> for details.

=cut
