# SNMP::Info::Layer2::Ubiquiti - SNMP Interface to Ubiquiti Devices
#
# Copyright (c) 2019 by The Netdisco Developer Team.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
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package SNMP::Info::Layer2::Ubiquiti;

use strict;
use warnings;
use Exporter;
use SNMP::Info::IEEE802dot11;
use SNMP::Info::Layer2;
use SNMP::Info::Layer3;  # only used in sub mac()



@SNMP::Info::Layer2::Ubiquiti::ISA
    = qw/SNMP::Info::IEEE802dot11 SNMP::Info::Layer2 Exporter/;
@SNMP::Info::Layer2::Ubiquiti::EXPORT_OK = qw//;

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

$VERSION = '3.975000';

%MIBS = (
    %SNMP::Info::Layer2::MIBS,
    %SNMP::Info::IEEE802dot11::MIBS,
);

%GLOBALS = (
  %SNMP::Info::Layer2::GLOBALS,
  %SNMP::Info::IEEE802dot11::GLOBALS,
);

%FUNCS = (
    %SNMP::Info::Layer2::FUNCS,
    %SNMP::Info::IEEE802dot11::FUNCS,
);

%MUNGE = ( %SNMP::Info::Layer2::MUNGE, %SNMP::Info::IEEE802dot11::MUNGE, );

sub os {
    my $ubnt = shift;

    my $names = $ubnt->dot11_prod_name();

    foreach my $iid ( keys %$names ) {
        my $prod = $names->{$iid};
        next unless defined $prod;
        # Product names that match AirOS products
        if((lc $prod) =~ /station/ or (lc $prod) =~ /beam/ or (lc $prod) =~ /grid/){
                return 'AirOS';
        # Product names that match UAP
        }elsif((lc $prod) =~ /uap/){
                return 'UniFi';
        }else{
            # Continue below to find OS name
        }
    }

    ## EdgeMAX OS (EdgeSwitch and EdgeRouter) name is first field split by space
    my $ver = $ubnt->description() || '';

    my @myver = split(/ /, $ver);

    return $myver[0];
}

sub os_ver {
    my $ubnt = shift;

    my $versions = $ubnt->dot11_prod_ver();

    foreach my $iid ( keys %$versions ) {
        my $ver = $versions->{$iid};
        next unless defined $ver;
        my $os = $ubnt->os;
        if($os == 'AirOS'){
            ## pretty up the version reporting for AirOS to include hardware (XW, XM, etc) and three major groups of firmware
            my @firmware =  split(/v/, $ver);
            my @firmwareSplit = split(/\./, $firmware[1]);
            my @prefix = split(/\./, $ver);
            $ver = $prefix[0] . '-v' . join('.', @firmwareSplit[0,1,2]);
        }
        return $ver;
        ## Not sure what this function does, it seems to be extraneous being in the same code block after a return statement?
        #if ( $ver =~ /([\d\.]+)/ ) {
        #    return $1;
        #}
    }

    my $ver = $ubnt->description() || '';
    if((lc $ver) =~ /^edgeswitch/){
        ## EdgeSwitch OS version is second field split by comma and bootcode version is last
        my @myver = split(/, /, $ver);
        my @firmware = split(/\./, $myver[1]);
        my @bootcode = split(/\./, $myver[-1]);

        ## Return only three major version groupings and include bootcode version
        return join('.', @firmware[0,1,2]) . '.-b' . join('.', @bootcode[0,1,2]);

    }

    ## EdgeRouter OS version is second field split by space
    my @myver = split(/ /, $ver);
    my @firmware = split(/\./, $myver[1]);

    if($firmware[2] =~ /hotfix$/){
        # edge case where EdgeOS has hotfix versions in format "EdgeOS v1.9.7+hotfix.4.5024004.171005.0403"
        $firmware[2] = $firmware[2] . '.' . $firmware[3]
    }
    ## Return only three major version groupings
    return join('.', @firmware[0,1,2]);
}

sub vendor {
    return 'ubiquiti';
}

sub model {
    my $ubnt = shift;

    my $names = $ubnt->dot11_prod_name();

    foreach my $iid ( keys %$names ) {
        my $prod = $names->{$iid};
        next unless defined $prod;
        return $prod;
    }

    my $desc = $ubnt->description() || '';

    ## Pull Model from beginning of description, separated by comma (EdgeSwitch)
    if((lc $desc) =~ /^edgeswitch/){
        my @mydesc = split(/, /, $desc);
        return $mydesc[0];
    }

    if(!((lc $desc) =~ /edgeos/)){
        # Not sure what type of device this is to get Model
        # Wireless devices report dot11_prod_name
        # EdgeSwitch includes model directly and edgeos logic is in else statement
        return ;
    }else{
        ## do some logic to determine ER model based on tech specs from ubnt:
        ## https://help.ubnt.com/hc/en-us/articles/219652227--EdgeRouter-Which-EdgeRouter-Should-I-Use-#tech%20specs
        ## Would be nice if UBNT simply adds the model string to their SNMP daemon directly
        my $ethCount = 0;
        my $switchCount = 0;
        #my $sfpCount = 0;
        #my $poeCount = 0;
        my $memTotalReal = $ubnt->memTotalReal;
        my $cpuLoad = $ubnt->hrProcessorLoad;
        my $cpuCount = 0;
        ## My perl is lacking. Not sure if there's a more efficient way to find the cpu count
        foreach my $iid ( keys %$cpuLoad ) {
            $cpuCount++;
        }

        my $ifDescs = $ubnt->ifDescr;
        foreach my $iid ( keys %$ifDescs ) {
            my $ifDesc = $ifDescs->{$iid};
            next unless defined $ifDesc;

            if((lc $ifDesc) =~ /^eth\d+$/){ # exclude vlan interfaces. Ex: eth1.5
                $ethCount++;
            }elsif((lc $ifDesc) =~ /^switch/){
                $switchCount++;
            }
        }

        ## If people have other models to further fine-tune this logic that would be great.
        if($ethCount eq 9){
            ## Should be ER Infinity
            return "EdgeRouter Infinity"
        }if($ethCount eq 8){
            ## Could be ER-8 Pro, ER-8, or EP-R8
            return "EdgeRouter 8-Port"
        }if($ethCount eq 12){
            ## ER-12
            return "EdgeRouter 12-Port"
        }elsif($ethCount eq 5 and $cpuCount eq 4){
            ## Could be ER-X or ER-X-SFP
            return "EdgeRouter X 5-Port"
        }elsif($ethCount eq 5){
            return "EdgeRouter PoE 5-Port"
        }elsif($ethCount eq 3 and $cpuCount eq 2){
            return "EdgeRouter LITE 3-Port"
        }else{
            ## failback string
            return "EdgeRouter eth-$ethCount switch-$switchCount mem-$memTotalReal cpuNum-$cpuCount";
        }

    }
}

## simply take the MAC and clean it up
sub serial {
    my $ubnt = shift;

    my $serial = $ubnt->mac();
    if($serial){
        $serial =~ s/://g;
        return uc $serial;
    }
    return ;
}

## UBNT doesn't put the primary-mac interface at index 1
sub mac {
    my $ubnt = shift;
    my $ifDescs = $ubnt->ifDescr;
    my $erModel = $ubnt->model;

    foreach my $iid ( keys %$ifDescs ) {
        my $ifDesc = $ifDescs->{$iid};
        next unless defined $ifDesc;
        ## CPU Interface will have the primary MAC for EdgeSwitch
        ## eth0 will have primary MAC for linux-based UBNT devices, except ER-12 which is eth11
        if($ifDesc =~ /CPU/ or ($ifDesc eq 'eth0' and !($erModel =~ /EdgeRouter 12/)) or ($ifDesc eq 'eth11' and ($erModel =~ /EdgeRouter 12/))){
            my $mac = $ubnt->ifPhysAddress->{$iid};

            # syntax stolen from sub munge_mac in SNMP::Info
            $mac = lc join( ':', map { sprintf "%02x", $_ } unpack( 'C*', $mac ) );
            return $mac if $mac =~ /^([0-9A-F][0-9A-F]:){5}[0-9A-F][0-9A-F]$/i;
        }
    }

    # MAC malformed or missing
    return;
}

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

    my $interfaces = $ubnt->i_index($partial)       || {};
    my $i_descr    = $ubnt->i_description($partial) || {};
    my $return = {};

    foreach my $iid ( keys %$i_descr ) {
        # Slot: 0 Port: 4 Gigabit - Level
        if ($i_descr->{$iid} =~ m/([0-9]+)[^0-9]+([0-9]+)/) {
            $return->{$iid} = $1 .'/'. $2;
            next;
        }
        # Link Aggregate 4
        if ($i_descr->{$iid} =~ m/Link Aggregate (\d+)/) {
            $return->{$iid} = '3/'. $1;
            next;
        }
        # else
        $return->{$iid} = $i_descr->{$iid};
    }

    return $return;
}

sub i_ignore {
    my $l2      = shift;
    my $partial = shift;

    my $interfaces = $l2->interfaces($partial) || {};
    my $i_descr    = $l2->i_description($partial) || {};

    my %i_ignore;
    foreach my $if ( keys %$interfaces ) {

        # CPU Interface
        if ( $i_descr->{$if} =~ /CPU Interface/i ) {
            $i_ignore{$if}++;
        }
    }
    return \%i_ignore;
}

1;
__END__

=head1 NAME

SNMP::Info::Layer2::Ubiquiti - SNMP Interface to Ubiquiti Access Points

=head1 AUTHOR

Max Kosmach

=head1 SYNOPSIS

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

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

=head1 DESCRIPTION

Provides abstraction to the configuration information obtainable from
Ubiquiti Access Point through SNMP.

=head2 Inherited Classes

=over

=item SNMP::Info::Layer2

=item SNMP::Info::IEEE802dot11

=back

=head2 Required MIBs

None.

=head2 Inherited MIBs

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

See L<SNMP::Info::IEEE802dot11/"Required MIBs"> for its MIB requirements.

=head1 GLOBALS

These are methods that return scalar value from SNMP

=over

=item $ubnt->vendor()

Returns 'ubiquiti'

=item $ubnt->model()

Returns the model extracted from C<dot11manufacturerProductName>, with fallback to some complex logic for EdgeMax devices

=item $ubnt->serial()

Serial Number.

=item $ubnt->mac()

Bridge MAC address.

=item $ubnt->os()

Returns C<AirOS>, C<UniFi> or C<EdgeOS> depending on model.

=item $ubnt->os_ver()

Returns the software version extracted from C<dot11manufacturerProductVersion>, with fallback to description splitting for EdgeMax devices

=back

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

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

=head2 Global Methods imported from SNMP::Info::IEEE802dot11

See L<SNMP::Info::IEEE802dot11/"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 $ubnt->interfaces()

Uses the i_name() field.

=item $ubnt->i_ignore()

Ignores interfaces with "CPU Interface" in them.

=back

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

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

=head2 Table Methods imported from SNMP::Info::IEEE802dot11

See L<SNMP::Info::IEEE802dot11/"TABLE METHODS"> for details.

=cut
