# SNMP::Info::Layer3::Dell - SNMP Interface to Dell devices
# $Id$
#
# Copyright (c) 2008 Eric Miller
# 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
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# 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::Layer3::Dell;

use strict;
use Exporter;
use SNMP::Info::Layer3;

@SNMP::Info::Layer3::Dell::ISA       = qw/SNMP::Info::Layer3 Exporter/;
@SNMP::Info::Layer3::Dell::EXPORT_OK = qw//;

use vars qw/$VERSION %GLOBALS %FUNCS %MIBS %MUNGE/;

$VERSION = '2.06';

%MIBS = (
    %SNMP::Info::Layer3::MIBS,
    'RADLAN-Physicaldescription-MIB' => 'rlPhdStackReorder',
    'RADLAN-rlInterfaces'            => 'rlIfNumOfLoopbackPorts',
    'RADLAN-HWENVIROMENT'            => 'rlEnvPhysicalDescription',
    'Dell-Vendor-MIB'                => 'productIdentificationVersion',
);

%GLOBALS = (
    %SNMP::Info::Layer3::GLOBALS,
    'os_ver'       => 'productIdentificationVersion',
    'dell_id_name' => 'productIdentificationDisplayName',
);

%FUNCS = (
    %SNMP::Info::Layer3::FUNCS,

    # RADLAN-rlInterfaces:swIfTable
    'dell_duplex_admin' => 'swIfDuplexAdminMode',
    'dell_duplex'       => 'swIfDuplexOperMode',
    'dell_tag_mode'     => 'swIfTaggedMode',
    'dell_i_type'       => 'swIfType',
    'dell_fc_admin'     => 'swIfFlowControlMode',
    'dell_speed_admin'  => 'swIfSpeedAdminMode',
    'dell_auto'         => 'swIfSpeedDuplexAutoNegotiation',
    'dell_fc'           => 'swIfOperFlowControlMode',

    # RADLAN-Physicaldescription-MIB:rlPhdUnitGenParamTable
    'dell_unit'      => 'rlPhdUnitGenParamStackUnit',
    'dell_sw_ver'    => 'rlPhdUnitGenParamSoftwareVersion',
    'dell_fw_ver'    => 'rlPhdUnitGenParamFirmwareVersion',
    'dell_hw_ver'    => 'rlPhdUnitGenParamHardwareVersion',
    'dell_serial_no' => 'rlPhdUnitGenParamSerialNum',
    'dell_asset_no'  => 'rlPhdUnitGenParamAssetTag',

    # RADLAN-COPY-MIB:rlCopyTable
    'dell_cp_idx'     => 'rlCopyIndex',
    'dell_cp_sloc'    => 'rlCopySourceLocation',
    'dell_cp_sip'     => 'rlCopySourceIpAddress',
    'dell_cp_sunit'   => 'rlCopySourceUnitNumber',
    'dell_cp_sfile'   => 'rlCopySourceFileName',
    'dell_cp_stype'   => 'rlCopySourceFileType',
    'dell_cp_dloc'    => 'rlCopyDestinationLocation',
    'dell_cp_dip'     => 'rlCopyDestinationIpAddress',
    'dell_cp_dunit'   => 'rlCopyDestinationUnitNumber',
    'dell_cp_dfile'   => 'rlCopyDestinationFileName',
    'dell_cp_dtype'   => 'rlCopyDestinationFileType',
    'dell_cp_state'   => 'rlCopyOperationState',
    'dell_cp_bkgnd'   => 'rlCopyInBackground',
    'dell_cp_rstatus' => 'rlCopyRowStatus',

    # RADLAN-HWENVIROMENT:rlEnvMonSupplyStatusTable
    'dell_pwr_src'   => 'rlEnvMonSupplySource',
    'dell_pwr_state' => 'rlEnvMonSupplyState',
    'dell_pwr_desc'  => 'rlEnvMonSupplyStatusDescr',

    # RADLAN-HWENVIROMENT:rlEnvMonFanStatusTable
    'dell_fan_state' => 'rlEnvMonFanState',
    'dell_fan_desc'  => 'rlEnvMonFanStatusDescr',
);

%MUNGE = ( %SNMP::Info::Layer3::MUNGE, );

# Method OverRides

sub model {
    my $dell = shift;

    my $name  = $dell->dell_id_name();
    my $descr = $dell->description();

    if ( defined $name and $name =~ m/(\d+)/ ) {
        return $1;
    }

    # Don't have a vendor MIB for D-Link
    else {
        return $descr;
    }
}

sub vendor {
    my $dell = shift;

    return $dell->_vendor();
}

sub os {
    my $dell = shift;

    return $dell->_vendor();
}

sub serial {
    my $dell = shift;

    my $numbers = $dell->dell_serial_no();

    foreach my $key ( keys %$numbers ) {
        my $serial = $numbers->{$key};
        return $serial if ( defined $serial and $serial !~ /^\s*$/ );
        next;
    }

    # Last resort
    return $dell->SUPER::serial();
}

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

    my $i_descr = $dell->i_description($partial) || {};
    my $i_name  = $dell->orig_i_name($partial)   || {};

    # Descriptions are all the same on some Dells, so use name instead if
    # available
    foreach my $iid ( keys %$i_name ) {
        my $name = $i_name->{$iid};
        next unless defined $name;
        $i_descr->{$iid} = $name;
    }

    return $i_descr;
}

sub i_duplex_admin {
    my $dell    = shift;
    my $partial = shift;

    my $interfaces  = $dell->interfaces($partial)        || {};
    my $dell_duplex = $dell->dell_duplex_admin($partial) || {};
    my $dell_auto   = $dell->dell_auto($partial)         || {};

    my %i_duplex_admin;
    foreach my $if ( keys %$interfaces ) {
        my $duplex = $dell_duplex->{$if};
        next unless defined $duplex;
        my $auto = $dell_auto->{$if} || 'false';

        $duplex = 'half' if ( $duplex =~ /half/i and $auto =~ /false/i );
        $duplex = 'full' if ( $duplex =~ /half/i and $auto =~ /false/i );
        $duplex = 'auto' if $auto =~ /true/i;
        $i_duplex_admin{$if} = $duplex;
    }
    return \%i_duplex_admin;
}

# Use same methods as netgear.  Some device didn't implement the bridge MIB
# forwarding table and some don't return MACs for VLANs other than default yet
# don't support community indexing, so we use the Q-BRIDGE-MIB forwarding
# table.  Fall back to the orig functions if the qb versions don't
# return anything.
sub fw_mac {
    my $dell = shift;
    my $ret  = $dell->qb_fw_mac();
    $ret = $dell->orig_fw_mac() if ( !defined($ret) );
    return $ret;
}

sub fw_port {
    my $dell = shift;
    my $ret  = $dell->qb_fw_port();
    $ret = $dell->orig_fw_port() if ( !defined($ret) );
    return $ret;
}

sub _vendor {
    my $dell = shift;

    my $id = $dell->id() || 'undef';
    my %oidmap = (
        2    => 'ibm',
        171  => 'dlink',
        674  => 'dell',
        3955 => 'linksys',
    );
    $id = $1 if ( defined($id) && $id =~ /^\.1\.3\.6\.1\.4\.1\.(\d+)/ );

    if ( defined($id) and exists( $oidmap{$id} ) ) {
        return $oidmap{$id};
    }
    else {
        return 'dlink';
    }
}

1;
__END__

=head1 NAME

SNMP::Info::Layer3::Dell - SNMP Interface to Dell Power Connect Network
Devices

=head1 AUTHOR

Eric Miller

=head1 SYNOPSIS

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

 my $class = $dell->class();

 print "SNMP::Info determined this device to fall under subclass : $class\n";

=head1 DESCRIPTION

Provides abstraction to the configuration information obtainable from an 
Dell Power Connect device through SNMP.  D-Link and the IBM BladeCenter
Gigabit Ethernet Switch Module also use this module based upon MIB support. 

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

my $dell = new SNMP::Info::Layer3::Dell(...);

=head2 Inherited Classes

=over

=item SNMP::Info::Layer3

=back

=head2 Required MIBs

=over

=item F<Dell-Vendor-MIB>

=item F<RADLAN-Physicaldescription-MIB>

=item F<RADLAN-rlInterfaces>

=item F<RADLAN-HWENVIROMENT>

=item Inherited Classes' MIBs

See classes listed above for their required MIBs.

=back

=head1 GLOBALS

These are methods that return scalar value from SNMP

=over

=item $dell->os_ver()

(C<productIdentificationVersion>)

=item $dell->dell_id_name()

(C<productIdentificationDisplayName>)

=item $dell->model()

Returns model type.  Returns numeric from
(C<productIdentificationDisplayName>) if available, otherwise if returns
description().

=item $dell->vendor()

Returns 'dell', 'dlink', or 'ibm' based upon the IANA enterprise number in
id().  Defaults to 'dlink'.

=item $dell->os()

Returns 'dell', 'dlink', or 'ibm' based upon the IANA enterprise number in
id().  Defaults to 'dlink'.

=back

=head2 Overrides

=over

=item $dell->serial()

Returns serial number. Returns (C<rlPhdUnitGenParamSerialNum>) if available,
otherwise uses the Layer3 serial method.

=back

=head2 Globals imported from SNMP::Info::Layer3

See documentation in L<SNMP::Info::Layer3/"GLOBALS"> for details.

=head1 TABLE METHODS

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

=head2 RADLAN Interface Table (C<swIfTable>)

=over

=item $dell->dell_duplex_admin()

(C<swIfDuplexAdminMode>)

=item $dell->dell_duplex()

(C<swIfDuplexOperMode>)

=item $dell->dell_tag_mode()

(C<swIfTaggedMode>)

=item $dell->dell_i_type()

(C<swIfType>)

=item $dell->dell_fc_admin()

(C<swIfFlowControlMode>)

=item $dell->dell_speed_admin()

(C<swIfSpeedAdminMode>)

=item $dell->dell_auto()

(C<swIfSpeedDuplexAutoNegotiation>)

=item $dell->dell_fc()

(C<swIfOperFlowControlMode>)

=back

=head2 Overrides

=over

=item $dell->interfaces()

Returns the map between SNMP Interface Identifier (iid) and physical port
name.  Uses name if available instead of description since descriptions are 
sometimes not unique.

=item $dell->i_duplex_admin()

Returns reference to hash of iid to current link administrative duplex
setting.

=item $dell->fw_mac()

Returns reference to hash of forwarding table MAC Addresses.

Some devices don't implement the C<BRIDGE-MIB> forwarding table, so we use
the C<Q-BRIDGE-MIB> forwarding table.  Fall back to the C<BRIDGE-MIB> if
C<Q-BRIDGE-MIB> doesn't return anything.

=item $dell->fw_port()

Returns reference to hash of forwarding table entries port interface
identifier (iid)

Some devices don't implement the C<BRIDGE-MIB> forwarding table, so we use
the C<Q-BRIDGE-MIB> forwarding table.  Fall back to the C<BRIDGE-MIB> if
C<Q-BRIDGE-MIB> doesn't return anything.

=back

=head2 Table Methods imported from SNMP::Info::Layer3

See documentation in L<SNMP::Info::Layer3/"TABLE METHODS"> for details.

=cut
