# SNMP::Info::Layer3::Netscreen
# Kent Hamilton
# $Id$
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package SNMP::Info::Layer3::Netscreen;
$VERSION = 1.05;
use strict;

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

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

use vars qw/$VERSION %FUNCS %GLOBALS %MIBS %MUNGE $AUTOLOAD $INIT $DEBUG/;
 
%MIBS    = ( 
	     %SNMP::Info::Layer3::MIBS,
	     'NETSCREEN-SMI'             => 'netscreenSetting',
             'NETSCREEN-PRODUCTS-MIB'    => 'netscreenGeneric',
	     'NETSCREEN-INTERFACE-MIB'   => 'nsIfIndex',
             'NETSCREEN-SET-GEN-MIB'     => 'nsSetGenSwVer',
           );

%GLOBALS = (
             %SNMP::Info::Layer3::GLOBALS,
	     'os_version'   =>  'nsSetGenSwVer',
           );

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

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

sub layers {
	return '01001100';
}

sub vendor {
    return 'netscreen';
}

sub os {
    return 'screenos';
}

sub os_ver {
    my $netscreen = shift;

    my $descr = $netscreen->description();
    if ( $descr =~ m/version (\d\S*) \(SN: /) {
      return $1;
    }
    return undef;
}

sub serial {
    my $netscreen = shift;

    my $e_serial = $netscreen->e_serial() || {};

    my $serial = $e_serial->{1} || undef;

    return $1 if (defined $serial and $serial =~ /(\d+)/);
    my $descr = $netscreen->description();
    if ( $descr =~ m/version .*\(SN: (\d\S*),/) {
        return $1;
    }
    return undef;
}

1;

__END__

=head1 NAME

SNMP::Info::Layer3::Netscreen - SNMP Interface to Juniper Netscreen Devices

=head1 AUTHOR

Kent Hamilton

=head1 SYNOPSIS

    #Let SNMP::Info determine the correct subclass for you.

    my $netscreen = new SNMP::Info(
                          AutoSpecify => 1,
                          Debug       => 1,
                          # These arguments are passed directly on to SNMP::Session
                          DestHost    => 'myswitch',
                          Community   => 'public',
                          Version     => 2
                        ) 

    or die "Can't connect to DestHost.\n";

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

=head1 DESCRIPTION

Provides abstraction to the configuration information obtainable from a 
Netscreen device through SNMP. See inherited classes' documentation for 
inherited methods.

my $netscreen = new SNMP::Info::Layer3::Netscreen(...);

=head2 Inherited Classes

=over

=item SNMP::Info::Layer3

=back

=head2 Required MIBs

=over

=item NETSCREEN-SMI

=item NETSCREEN-PRODUCTS-MIB

=item NETSCREEN-INTERFACE-MIB

=item NETSCREEN-SET-GEN-MIB

=item Inherited Classes

See L<SNMP::Info::Layer3/"Required MIBs"> and its inherited classes.

=back

=head1 GLOBALS

These are methods that return scalar value from SNMP

=over

=item $netscreen->vendor()

Returns 'netscreen'

=item $netscreen->os()

Returns 'screenos'

=item $netscreen->os_ver()

Extracts the OS version from the description string.

=item $netscreen->serial()

Returns serial number..

=back

=head2 Overrides

=over

=item $netscreen->layers()

Returns 01001100.  Device doesn't report layers properly, modified to reflect 
Layer3 functionality.

=back

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

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

=head1 TABLE ENTRIES

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

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

See L<SNMP::Info::Layer3/"TABLE ENTRIES"> for details.

=cut