#!/usr/bin/perl

#

# Copyright (c) IBM Corp. 2009, 2010, All Rights Reserved

#

# Author(s):	Vasileios Pappas <vpappas@us.ibm.com>

#		Jens Osterkamp <jens@linux.vnet.ibm.com>

#

# Permission is hereby granted, free of charge, to any person obtaining a copy

# of this software and associated documentation files (the "Software"), to

# deal

# in the Software without restriction, including without limitation the rights

# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

# copies of the Software, and to permit persons to whom the Software is

# furnished to do so, subject to the following conditions:

#

# The above copyright notice and this permission notice shall be included in

# all copies or substantial portions of the Software.

#

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

# FROM,

# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

# THE SOFTWARE.

use NetSNMP::OID (':all');

use NetSNMP::ASN (':all');

use NetSNMP::agent (':all');

sub STP_PROP_VALUE() { 0x01}

sub STP_PROP_FILE() { 0x02}

sub STP_PROP_DEC() { 0x04}

sub STP_PROP_HEX() { 0x08}

sub FDB_STATUS_OTHER { 1 }

sub FDB_STATUS_INVALID { 2 }

sub FDB_STATUS_LEARNED { 3 }

sub FDB_STATUS_SELF { 4 }

sub FDB_STATUS_MGMT { 5 }

my %oid_value;

my %oid_type;

my %oid_next;

my (%indexes, %interfaces, %macs, %ages, %locals, %vlans, %tagged);

my $oid;

$subagent=0;

my $netdir="/sys/class/net/";

my $targetbridge;

$cache_timout=60;

$last_populated=0;

my $regoid = ".1.3.6.1.2.1.17";

# are we running embedded ? If not, register as subagent

if (!$agent) {

    $agent = new NetSNMP::agent('Name' => 'dot1qbridge',

				'AgentX' => 1);

    $subagent = 1;

    if ( $#ARGV != 0) {

	usage($0);

	exit();

    }

    $targetbridge = $ARGV[0];

} else {

    if (!defined($bridge)) {

	usage($0);

	exit();

    }

    $targetbridge = $bridge;

}

$agent->register("dot1qbridge", ".1.3.6.1.2.1.17", \&request_handler) or die "registration of handler failed !\n";

if ($subagent) {

	# register handler for graceful shutdown

	$SIG{'INT'} = \&shutdown;

	$SIG{'QUIT'} = \&shutdown;

	$running = 1;

	while($running) {

		$agent->agent_check_and_process(1);

	}

	$agent->shutdown();

}

sub usage {

	my $name = shift;

	if ($subagent) {

		print $name."\n\n";

		print "usage: \t$name <bridge>	start snmp bridge module".

			" for bridge <bridge>\n\n";

		print "arguments:	bridge		name of the Linux bridge".

			" which you want to provide info via snmp for.\n\n";

	} else {

		print 'usage in snmpd.conf: perl $bridge="br0"; perl do <path to $name>\n';

	}

	print "number of arguments given $#ARGV\n\n";

}

sub request_handler {

	my ($handler, $registration_info, $request_info, $requests)=@_;

	my $request;

	populate_mib($targetbridge);

	for($request = $requests; $request; $request = $request->next()) {

		if($request_info->getMode() == MODE_GET) {

			mode_get($request);

		} elsif($request_info->getMode() == MODE_GETNEXT) {

			mode_get_next($request);

		} else {

			print STDERR "mode not implemented.\n";

		}

	}

}

sub mode_get{

	my ($request)=@_;

	my $oid=$request->getOID();

	$SNMP::use_numeric = 1;

	my $noid=SNMP::translateObj($oid);

	reply($request, $noid) if (exists $oid_value{$noid});

}

sub find_next{

	my ($noid) = @_;

	my $nextoid = $oid_next{$noid};

	if(!defined($nextoid) || !defined($oid_value{$nextoid})) {

		# find the lowest OID whis is higher than $noid

		$prev = ".1.3.6.1.2.1.18";

		$prev_oid = new NetSNMP::OID($prev);

		$noid_oid = new NetSNMP::OID($noid);

		#print "looking for next of $noid\n";

		for my $candidate (keys %oid_value) {

			#print "evaluating $candidate\n";

			$candidate_oid = new NetSNMP::OID($candidate);

			if ($noid_oid < $candidate_oid && $prev_oid > $candidate_oid) {

				#print "found candidate $candidate\n";

				$prev = $candidate;

				$prev_oid = $candidate_oid;

			}

		}

		if ($prev eq ".1.3.6.1.2.1.18") {

			return; # no OID higher than $noid found

		}

		$nextoid = $prev;

	}

	return $nextoid;

}

sub mode_get_next{

	my ($request)=@_;

	my $oid=$request->getOID();

	$SNMP::use_numeric = 1;

	my $noid=SNMP::translateObj($oid);

	my $nextoid = find_next($noid);

	#print "found $nextoid\n";

	if(defined($nextoid)) {

		my $type = $oid_type{$nextoid};

		my $value = $oid_value{$nextoid};

		if (defined($type) and defined($value)) {

			reply($request,	$nextoid);

		}

	}

}

sub reply{

	my ($request, $oid)=@_;

	my $type=$oid_type{$oid};

	my $value=$oid_value{$oid};

	$request->setOID(new NetSNMP::OID($oid));

	$request->setValue($type, $value);

}

# Populated MIB OID

#

## dot1dBasePort:	1.3.6.1.2.1.17.1.4.1.1.<dot1dBasePort>

#			INTEGER32

#

# dot1dBasePortIfIndex:	1.3.6.1.2.1.17.1.4.1.2.<dot1dBasePort>

#			INTEGER32

#

# dot1dStp*:		1.3.6.1.2.1.17.2.<1-14>

#			INTEGER, OCTET STRING

#

# dot1dTpFdbAddress:	1.3.6.1.2.1.17.4.3.1.1.<dot1dTpFdbAddress>

#			OCTET STRING (SIZE (6))

#

# dot1dTpFdbPort:	1.3.6.1.2.1.17.4.3.1.2.<dot1dTpFdbAddress>

#			INTEGER32

#

# dot1dTpFdbStatus:	1.3.6.1.2.1.17.4.3.1.3.<dot1dTpFdbAddress>

#			INTEGER

#			1 : other

#			2 : invalid

#			3 : learned

#			4 : self

#			5 : mgmt

#

sub populate_mib {

	my $now;

	my $bridge = shift;

	my $seconds_passed;

	$ports=0;

	$oid="";

        $now=time();

	$seconds_passed=$now-$last_populated;

        return if($seconds_passed <= $cache_timout);

        $last_populated=$now;

	%oid_value=();

	%oid_type=();

	%oid_next=();

	%indexes=();

	%interfaces=();

	%macs=();

	%ages=();

	%locals=();

	%vlans=();

	%tagged=();

	# first populated oid

	$oid_next{".1.3.6.1.2.1.17"}=".1.3.6.1.2.1.17.1.1";

	createbaseinfo($bridge);

	readindexes($bridge);

	readforwards($bridge);

	readvlans($bridge);

	createports($bridge);

	stpproperties($bridge);

	stpportproperties($bridge);

	dot1dTpproperties();

	my $prevoid = $oid;

	my $curroid = createmacs($bridge);

	$oid_next{$prevoid} = $curroid;

	portproperties($bridge);

	dot1qbase($bridge);

	dot1qfdb($bridge);

	dot1qcurrentvlans($bridge);

	return 0;

}

sub findbridges()

{

	my @bridges;

	opendir(DIR, $netdir) or die "unable to open $netdir !\n";

	while(my $br=readdir(DIR)){

		next if $br eq ".";

		next if $br eq "..";

		next unless -d $netdir.$br."/bridge";

		push @bridges, $br;

	}

	close(DIR);

	return @bridges;

}

sub createbaseinfo()

{

	my $bridge = shift;

	$oid=".1.3.6.1.2.1.17.1.1";

	$oid_value{$oid}=mac2hex(readfile($netdir.$bridge."/address", 0));

	$oid_type{$oid}=ASN_OCTET_STR;

	$oid_next{$oid}=".1.3.6.1.2.1.17.1.2";

	opendir(DIR, $netdir.$bridge."/brif/") or die "Could not open ".$netdir.$bridge."brif !\n";

	foreach $entry (readdir(DIR)) {

		next if $entry eq ".";

		next if $entry eq "..";

		# only count non-vlan interfaces

		next if $entry =~ /\.[0-9]*/;

		$ports++;

	}

	closedir(DIR);

	$oid=".1.3.6.1.2.1.17.1.2";

	$oid_value{$oid}=$ports;

	$oid_type{$oid}=ASN_INTEGER;

	$oid_next{$oid}=".1.3.6.1.2.1.17.1.3";

	$oid=".1.3.6.1.2.1.17.1.3";

	$oid_value{$oid}="2";	# transparent only

	$oid_type{$oid}=ASN_INTEGER;

	$oid_next{$oid}=".1.3.6.1.2.1.17.1.4.1.1.1";

}

sub createmacs()

{

	my $bridge = shift;

        my $start_oid = $oid = ".1.3.6.1.2.1.17.4.3.1";

	foreach my $mac (sort {$a cmp $b} keys %macs) {

		my $mac_oid=mac2oid($mac);

		unless(defined($first_mac_oid)){

			$first_mac_oid=$mac_oid;

			$oid_next{$oid.".1"}=$oid.".1".$mac_oid;

			$oid_next{$oid.".2"}=$oid.".2".$mac_oid;

			$oid_next{$oid.".3"}=$oid.".3".$mac_oid;

		}

		my $port=$macs{$mac}{$bridge};

		my $baseport=$baseports{$bridge}{$port};

		my $status=$locals{$mac}{$bridge};

		my $age=$ages{$mac}{$bridge};

		$oid_value{$oid.".1".$mac_oid}=mac2hex($mac);

		$oid_type{$oid.".1".$mac_oid}=ASN_OCTET_STR;

		if(defined($prv_mac_oid)){

			$oid_next{$oid.".1".$prv_mac_oid}=

				$oid.".1".$mac_oid;

		}

		$oid_value{$oid.".2".$mac_oid}=$baseport;

		$oid_type{$oid.".2".$mac_oid}=ASN_INTEGER;

		if(defined($prv_mac_oid)){

			$oid_next{$oid.".2".$prv_mac_oid}=

				$oid.".2".$mac_oid;

		}

		$oid_value{$oid.".3".$mac_oid}=$status;

		$oid_type{$oid.".3".$mac_oid}=ASN_INTEGER;

		if(defined($prv_mac_oid)){

			$oid_next{$oid.".3".$prv_mac_oid}=

				$oid.".3".$mac_oid;

		}

		$prv_mac_oid=$mac_oid;

	}

	if ($prv_mac_oid and $first_mac_oid) {

		$oid_next{$oid.".1".$prv_mac_oid}=$oid.".2".$first_mac_oid;

		$oid_next{$oid.".2".$prv_mac_oid}=$oid.".3".$first_mac_oid;

		$oid_next{$oid.".3".$prv_mac_oid}=".1.3.6.1.2.1.17.4.4.1.1.1";

	}

	undef $prv_mac_oid;

	undef $first_mac_oid;

	return $start_oid.".1".$first_mac_oid;

}

# TODO: is this sequence complete ?

sub createports()

{

	my $bridge = shift;

	my ($baseport, $prev_baseport, $first_baseport);

	$baseport=1;

	my $oid= '.1.3.6.1.2.1.17.1.4.1';

	foreach my $port (keys %{$interfaces{$bridge}}) {

		unless(defined($first_baseport)){

			$first_baseport=$baseport;

			$oid_next{$oid.".1"}=$oid.".1.".$baseport;

			$oid_next{$oid.".2"}=$oid.".2.".$baseport;

		}

		my $index=$indexes{$bridge}{$port};

		$baseports{$bridge}{$port}=$baseport;

		$oid_value{$oid.".1.".$baseport}=$baseport;

		$oid_type{$oid.".1.".$baseport}=ASN_INTEGER;

		if(defined($prv_baseport)){

			$oid_next{$oid.".1.".$prv_baseport}=

				$oid.".1.".$baseport;

		}

		$oid_value{$oid.".2.".$baseport}=$index;

		$oid_type{$oid.".2.".$baseport}=ASN_INTEGER;

		if(defined($prv_baseport)){

			$oid_next{$oid.".2.".$prv_baseport}=

				$oid.".2.".$baseport;

		}

		$prv_baseport=$baseport;

		$baseport++;

	}

	if ( $prv_baseport and $first_baseport ) {

		$oid_next{$oid.".1.".$prv_baseport}=$oid.".2.".$first_baseport;

		$oid_next{$oid.".2.".$prv_baseport}=".1.3.6.1.2.1.17.2.1";

	}

	undef $prv_baseport;

	undef $first_baseport;

}

sub stpproperties()

{

	my $bridge = shift;

	my $dir = $netdir.$bridge."/bridge/";

	@stpprops = ( { oid => ".1.3.6.1.2.1.17.2.1",

			flags => STP_PROP_VALUE,

			value => "3",

			type => ASN_INTEGER,

			nextoid => ".1.3.6.1.2.1.17.2.2" },

			{ oid => ".1.3.6.1.2.1.17.2.2",

			flags => STP_PROP_FILE | STP_PROP_DEC,

			value => $dir."priority",

			type => ASN_INTEGER,

			nextoid => ".1.3.6.1.2.1.17.2.3" },

			{ oid => ".1.3.6.1.2.1.17.2.3",

			flags => STP_PROP_FILE | STP_PROP_DEC,

			value => $dir."topology_change_timer",

			type => ASN_TIMETICKS,

			nextoid => ".1.3.6.1.2.1.17.2.4" },

			{ oid => ".1.3.6.1.2.1.17.2.4",

			flags => STP_PROP_FILE | STP_PROP_DEC,

			value => $dir."topology_change",

			type => ASN_COUNTER,

			nextoid => ".1.3.6.1.2.1.17.2.5" },

			{ oid => ".1.3.6.1.2.1.17.2.5",

			flags => STP_PROP_FILE | STP_PROP_DEC,

			value => $dir."root_id",

			type => ASN_OCTET_STR,

			nextoid => ".1.3.6.1.2.1.17.2.6" },

			{ oid => ".1.3.6.1.2.1.17.2.6",

			flags => STP_PROP_FILE | STP_PROP_DEC,

			value => $dir."root_path_cost",

			type => ASN_INTEGER,

			nextoid => ".1.3.6.1.2.1.17.2.7" },

			{ oid => ".1.3.6.1.2.1.17.2.7",

			flags => STP_PROP_FILE | STP_PROP_DEC,

			value => $dir."root_port",

			type => ASN_INTEGER,

			nextoid => ".1.3.6.1.2.1.17.2.8" },

			{ oid => ".1.3.6.1.2.1.17.2.8",

			flags => STP_PROP_FILE | STP_PROP_DEC,

			value => $dir."max_age",

			type => ASN_INTEGER,

			nextoid => ".1.3.6.1.2.1.17.2.9" },

			{ oid => ".1.3.6.1.2.1.17.2.9",

			flags => STP_PROP_FILE | STP_PROP_DEC,

			value => $dir."hello_time",

			type => ASN_INTEGER,

			nextoid => ".1.3.6.1.2.1.17.2.11" },

			# TODO ...17.2.10

			{ oid => ".1.3.6.1.2.1.17.2.11",

			flags => STP_PROP_FILE | STP_PROP_DEC,

			value => $dir."forward_delay",

			type => ASN_INTEGER,

			nextoid => ".1.3.6.1.2.1.17.2.12" },

			{ oid => ".1.3.6.1.2.1.17.2.12",

			flags => STP_PROP_FILE | STP_PROP_DEC,

			value => $dir."max_age",

			type => ASN_INTEGER,

			nextoid => ".1.3.6.1.2.1.17.2.13" },

			{ oid => ".1.3.6.1.2.1.17.2.13",

			flags => STP_PROP_FILE | STP_PROP_DEC,

			value => $dir."hello_time",

			type => ASN_INTEGER,

			nextoid => ".1.3.6.1.2.1.17.2.14" },

			{ oid => ".1.3.6.1.2.1.17.2.14",

			flags => STP_PROP_FILE | STP_PROP_DEC,

			value => $dir."forward_delay",

			type => ASN_INTEGER,

			nextoid => ".1.3.6.1.2.1.17.2.15.1.1.1" },

			);

	for ($i=0; $i <= $#stpprops; $i++) {

		my %props = %{$stpprops[$i]};

		$oid = $props{'oid'};

		if ( $props{'flags'} & STP_PROP_VALUE,) {

			$oid_value{$oid} = $props{'value'};

		}

		if ( $props{'flags'} & STP_PROP_FILE,) {

			$oid_value{$oid} =

			readfile($props{'value'},

			$props{'flags'});

		}

		$oid_type{$oid} = $props{'type'};

		$oid_next{$oid} = $props{'nextoid'};

	}

}

sub stpportproperties

{

	my $bridge = shift;

	my $brifdir = $netdir.$bridge."/brif/";

	my ($baseport, $first_baseport, $prev_baseport);

	$oid='.1.3.6.1.2.1.17.2.15.1';

	foreach my $port (keys %{$interfaces{$bridge}}) {

		$baseport = $baseports{$bridge}{$port};

		unless(defined($first_baseport)){

			$first_baseport=$baseport;

			$oid_next{$oid.".1"}=$oid.".1.".$baseport;

			$oid_next{$oid.".2"}=$oid.".2.".$baseport;

		}

		my $interface = $interfaces{$bridge}{$port};

		my $ifdir = $brifdir.$interface;

		# dot1dStpPort

		$oid_value{$oid.".1.".$baseport}=$baseport;

		$oid_type{$oid.".1.".$baseport}=ASN_INTEGER;

		if(defined($prev_baseport)){

			$oid_next{$oid.".1.".$prev_baseport}=

				$oid.".1.".$baseport;

		}

		# dot1dStpPortPriority

		$oid_value{$oid.".2.".$baseport}=readfile($ifdir."/priority", 0);

		$oid_type{$oid.".2.".$baseport}=ASN_INTEGER;

		if(defined($prev_baseport)){

			$oid_next{$oid.".2.".$prev_baseport}=

				$oid.".2.".$baseport;

		}

		# dot1dStpPortState

		my @translation = (1, 3, 4, 5, 2);

		my $state = readfile($ifdir."/state", 0);

		$oid_value{$oid.".3.".$baseport}=$translation[$state];

		$oid_type{$oid.".3.".$baseport}=ASN_INTEGER;

		if(defined($prev_baseport)){

			$oid_next{$oid.".3.".$prev_baseport}=

				$oid.".3.".$baseport;

		}

		# dot1dStpPortEnable

		@translation = (2, 1, 1, 1, 1);

		$oid_value{$oid.".4.".$baseport}=$translation[$state];

		$oid_type{$oid.".4.".$baseport}=ASN_INTEGER;

		if(defined($prev_baseport)){

			$oid_next{$oid.".4.".$prev_baseport}=

				$oid.".4.".$baseport;

		}

		# dot1dStpPortPathCost

		$oid_value{$oid.".5.".$baseport}=readfile($ifdir."/path_cost", 0);

		$oid_type{$oid.".5.".$baseport}=ASN_INTEGER;

		if(defined($prev_baseport)){

			$oid_next{$oid.".5.".$prev_baseport}=

				$oid.".5.".$baseport;

		}

		# dot1dStpPortDesignatedRoot

		$oid_value{$oid.".6.".$baseport}=readfile($ifdir."/designated_root", 0);

		$oid_type{$oid.".6.".$baseport}=ASN_OCTET_STR;

		if(defined($prev_baseport)){

			$oid_next{$oid.".6.".$prev_baseport}=

				$oid.".6.".$baseport;

		}

		# dot1dStpPortDesignatedCost

		$oid_value{$oid.".7.".$baseport}=readfile($ifdir."/designated_cost", 0);

		$oid_type{$oid.".7.".$baseport}=ASN_INTEGER;

		if(defined($prev_baseport)){

			$oid_next{$oid.".7.".$prev_baseport}=

				$oid.".7.".$baseport;

		}

		# dot1dStpPortDesignatedBridge

		$oid_value{$oid.".8.".$baseport}=readfile($ifdir."/designated_bridge", 0);

		$oid_type{$oid.".8.".$baseport}=ASN_OCTET_STR;

		if(defined($prev_baseport)){

			$oid_next{$oid.".8.".$prev_baseport}=

				$oid.".8.".$baseport;

		}

		# dot1dStpPortDesignatedPort

		$oid_value{$oid.".9.".$baseport}=readfile($ifdir."/designated_port", 0);

		$oid_type{$oid.".9.".$baseport}=ASN_OCTET_STR;

		if(defined($prev_baseport)){

			$oid_next{$oid.".9.".$prev_baseport}=

				$oid.".9.".$baseport;

		}

		# dot1dStpPortForwardTransitions (no value in bridge module)

		# dot1dStpPortPathCost32

		$oid_value{$oid.".11.".$baseport}=readfile($ifdir."/path_cost", 0);

		$oid_type{$oid.".11.".$baseport}=ASN_INTEGER;

		if(defined($prev_baseport)){

			$oid_next{$oid.".11.".$prev_baseport}=

				$oid.".11.".$baseport;

		}

		$prev_baseport=$baseport;

	}

	if ( $prev_baseport and $first_baseport ) {

		$oid_next{$oid.".1.".$prev_baseport}=$oid.".2.".$first_baseport;

		$oid_next{$oid.".2.".$prev_baseport}=$oid.".3.".$first_baseport;

		$oid_next{$oid.".3.".$prev_baseport}=$oid.".4.".$first_baseport;

		$oid_next{$oid.".4.".$prev_baseport}=$oid.".5.".$first_baseport;

		$oid_next{$oid.".5.".$prev_baseport}=$oid.".6.".$first_baseport;

		$oid_next{$oid.".6.".$prev_baseport}=$oid.".7.".$first_baseport;

		$oid_next{$oid.".7.".$prev_baseport}=$oid.".8.".$first_baseport;

		$oid_next{$oid.".8.".$prev_baseport}=$oid.".9.".$first_baseport;

		$oid_next{$oid.".9.".$prev_baseport}=$oid.".11.".$first_baseport;

		$oid_next{$oid.".11.".$prev_baseport}=".1.3.6.1.2.1.17.4.1";

	}

	$oid = $oid.".11.".$prev_baseport;

	undef $prev_baseport;

	undef $first_baseport;

}

sub dot1dTpproperties()

{

	@stpprops = ( { oid => ".1.3.6.1.2.1.17.4.1",

			flags => STP_PROP_VALUE,

			value => "0",

			type => ASN_COUNTER,

			nextoid => ".1.3.6.1.2.1.17.4.2" },

			{ oid => ".1.3.6.1.2.1.17.4.2",

			flags => STP_PROP_VALUE,

			value => "300",

			type => ASN_INTEGER,

			nextoid => ".1.3.6.1.2.1.17.4.3" },

			);

	for ($i=0; $i <= $#stpprops; $i++) {

		my %props = %{$stpprops[$i]};

		$oid = $props{'oid'};

		if ( $props{'flags'} & STP_PROP_VALUE,) {

			$oid_value{$oid} = $props{'value'};

		}

		if ( $props{'flags'} & STP_PROP_FILE,) {

			$oid_value{$oid} =

			readfile($props{'value'},

			$props{'flags'});

		}

		$oid_type{$oid} = $props{'type'};

		$oid_next{$oid} = $props{'nextoid'};

	}

}

sub portproperties

{

	my $bridge = shift;

	my ($baseport, $first_baseport, $prev_baseport);

	$oid='.1.3.6.1.2.1.17.4.4.1';

	foreach my $port (keys %{$interfaces{$bridge}}) {

		$baseport = $baseports{$bridge}{$port};

		unless(defined($first_baseport)){

			$first_baseport=$baseport;

			$oid_next{$oid.".1"}=$oid.".1.".$baseport;

			$oid_next{$oid.".2"}=$oid.".2.".$baseport;

		}

		my $interface = $interfaces{$bridge}{$port};

		my $ifdir = $netdir.$interface;

		# dot1dTpPort

		$oid_value{$oid.".1.".$baseport}=$baseport;

		$oid_type{$oid.".1.".$baseport}=ASN_INTEGER;

		if(defined($prev_baseport)){

			$oid_next{$oid.".1.".$prev_baseport}=

				$oid.".1.".$baseport;

		}

		# dot1dTpPortMaxInfo

		$oid_value{$oid.".2.".$baseport}=readfile($ifdir."/mtu", 0);

		$oid_type{$oid.".2.".$baseport}=ASN_INTEGER;

		if(defined($prev_baseport)){

			$oid_next{$oid.".2.".$prev_baseport}=

				$oid.".2.".$baseport;

		}

		# dot1dTpPortInFrames

		$oid_value{$oid.".3.".$baseport}=readfile($ifdir."/statistics/rx_packets", 0);

		$oid_type{$oid.".3.".$baseport}=ASN_COUNTER;

		if(defined($prev_baseport)){

			$oid_next{$oid.".3.".$prev_baseport}=

				$oid.".3.".$baseport;

		}

		# dot1dTpPortOutFrames

		$oid_value{$oid.".4.".$baseport}=readfile($ifdir."/statistics/tx_packets", 0);

		$oid_type{$oid.".4.".$baseport}=ASN_COUNTER;

		if(defined($prev_baseport)){

			$oid_next{$oid.".4.".$prev_baseport}=

				$oid.".4.".$baseport;

		}

		# dot1dTpPortInDiscards

		$oid_value{$oid.".5.".$baseport}=readfile($ifdir."/statistics/rx_dropped", 0);

		$oid_type{$oid.".5.".$baseport}=ASN_COUNTER;

		if(defined($prev_baseport)){

			$oid_next{$oid.".5.".$prev_baseport}=

				$oid.".5.".$baseport;

		}

		$prev_baseport=$baseport;

	}

	if ( $prev_baseport and $first_baseport ) {

		$oid_next{$oid.".1.".$prev_baseport}=$oid.".2.".$first_baseport;

		$oid_next{$oid.".2.".$prev_baseport}=$oid.".3.".$first_baseport;

		$oid_next{$oid.".3.".$prev_baseport}=$oid.".4.".$first_baseport;

		$oid_next{$oid.".4.".$prev_baseport}=$oid.".5.".$first_baseport;

		$oid_next{$oid.".5.".$prev_baseport}=".1.3.6.1.2.1.17.5.1";

	}

	$oid = $oid.".5.".$prev_baseport;

	undef $prev_baseport;

	undef $first_baseport;

}

sub dot1qbase()

{

	my $bridge = shift;

	my $oid=".1.3.6.1.2.1.17.7.1.1";

	$oid_next{".1.3.6.1.2.1.17.7"}=$oid.".1";

	$oid_next{".1.3.6.1.2.1.17.7.1"}=$oid.".1";

	$oid_value{$oid.".1"}=1;

	$oid_type{$oid.".1"}=ASN_INTEGER;

	$oid_next{$oid.".1"}=$oid.".2";

	$oid_value{$oid.".2"}=4094;

	$oid_type{$oid.".2"}=ASN_UNSIGNED;

	$oid_next{$oid.".2"}=$oid.".3";

	$oid_value{$oid.".3"}=4094;

	$oid_type{$oid.".3"}=ASN_UNSIGNED;

	$oid_next{$oid.".3"}=$oid.".4";

	$oid_value{$oid.".4"}=0; # filled in by currentvlans

	$oid_type{$oid.".4"}=ASN_UNSIGNED;

	$oid_next{$oid.".4"}=$oid.".5";

	$oid_value{$oid.".5"}=2;

	$oid_type{$oid.".5"}=ASN_INTEGER;

	$oid_next{$oid.".5"}=0;  # filled in by dot1qfdb

}

sub dot1qfdb()

{

	my $bridge = shift;

	my $oid=".1.3.6.1.2.1.17.7.1.2";

	foreach my $vlan (sort {$a<=>$b} keys %vlans){

		unless(defined($first_vlan)){

			$first_vlan=$vlan;

			$oid_next{".1.3.6.1.2.1.17.7.1.1.5"}=$oid.".1.1.".$vlan;

			$oid_next{$oid}=$oid.".1.1.".$vlan;

			$oid_next{$oid.".1"}=$oid.".1.1.".$vlan;

			$oid_next{$oid.".1.1"}=$oid.".1.1.".$vlan;

			$oid_next{$oid.".1.2"}=$oid.".1.2.".$vlan;

		}

		$oid_value{$oid.".1.1.".$vlan}=$vlan;

		$oid_type{$oid.".1.1.".$vlan}=ASN_UNSIGNED;

		if(defined($prv_vlan)){

			$oid_next{$oid.".1.1.".$prv_vlan}=$oid.".1.1.".$vlan;

		}

		$oid_value{$oid.".1.2.".$vlan}=0; # to be filled later

		$oid_type{$oid.".1.2.".$vlan}=ASN_COUNTER;

		if(defined($prv_vlan)){

			$oid_next{$oid.".1.2.".$prv_vlan}=$oid.".1.2.".$vlan;

		}

		$prv_vlan=$vlan;

	}

	if($prv_vlan and $first_vlan){

		$oid_next{$oid.".1.1.".$prv_vlan}=$oid.".1.2.".$first_vlan;

		$oid_next{$oid.".1.2.".$prv_vlan}=0; # to be filled later

	}

	my %macvlan=();

	my %vlanmac=();

	foreach my $vlan (sort {$a<=>$b} keys %vlans){

		my $count=0;

		foreach my $mac (sort {$a cmp $b} keys %macs) {

			my $vbridge=$bridge."_vlan".$vlan;

			next unless(defined($macs{$mac}{$vbridge}));

			$count++;

			my $mac_oid=mac2oid($mac);

			$macvlan{$vlan.$mac_oid}=$mac;

			$vlanmac{$vlan.$mac_oid}=$vlan;

		}

		$oid_value{$oid.".1.2.".$vlan}=$count;

	}

	foreach my $vmac_oid (sort {$a cmp $b} keys %vlanmac){

		my $mac=$macvlan{$vmac_oid};

		my $vlan=$vlanmac{$vmac_oid};

		#print "VMAC: $vmac_oid ($vlan:$mac)\n";

		unless(defined($first_vmac_oid)){

			$first_vmac_oid=$vmac_oid;

			$oid_next{$oid.".1.2.".$prv_vlan}=$oid.".2.1.".$vmac_oid;

			$oid_next{$oid.".2"}=$oid.".2.1.".$vmac_oid;

			$oid_next{$oid.".2.1"}=$oid.".2.1.".$vmac_oid;

			$oid_next{$oid.".2.2"}=$oid.".2.2.".$vmac_oid;

			$oid_next{$oid.".2.3"}=$oid.".2.3.".$vmac_oid;

		}

		my $port=$macs{$mac}{$bridge};

		my $baseport=$baseports{$bridge}{$port};

		my $status=$locals{$mac}{$bridge};

		my $age=$ages{$mac}{$bridge};

		print "VLAN $vlan: $mac -> $port:$baseport ($status, $age)\n"; 

		$oid_value{$oid.".2.1.".$vmac_oid}=mac2hex($mac);

		$oid_type{$oid.".2.1.".$vmac_oid}=ASN_OCTET_STR;

		if(defined($prv_vmac_oid)){

			$oid_next{$oid.".2.1.".$prv_vmac_oid}=$oid.".2.1.".$vmac_oid;

		}

		$oid_value{$oid.".2.2.".$vmac_oid}=$baseport;

		$oid_type{$oid.".2.2.".$vmac_oid}=ASN_INTEGER;

		if(defined($prv_vmac_oid)){

			$oid_next{$oid.".2.2.".$prv_vmac_oid}=$oid.".2.2.".$vmac_oid;

		}

		$oid_value{$oid.".2.3.".$vmac_oid}=$status;

		$oid_type{$oid.".2.3.".$vmac_oid}=ASN_INTEGER;

		if(defined($prv_vmac_oid)){

			$oid_next{$oid.".2.3.".$prv_vmac_oid}=$oid.".2.3.".$vmac_oid;

		}

		$prv_vmac_oid=$vmac_oid;

	}

	if ($prv_vmac_oid and $first_vmac_oid) {

		$oid_next{$oid.".2.1.".$prv_vmac_oid}=$oid.".2.2.".$first_vmac_oid;

		$oid_next{$oid.".2.2.".$prv_vmac_oid}=$oid.".2.3.".$first_vmac_oid;

		$oid_next{$oid.".2.3.".$prv_vmac_oid}=".1.3.6.1.2.1.17.7.1.4.1";

	}

	undef $first_vmac_oid;

	undef $prv_vmac_oid;

	undef $first_vlan;

	undef $prv_vlan;

}

sub dot1qcurrentvlans()

{

	my $bridge = shift;

	my $oid=".1.3.6.1.2.1.17.7.1.4.1";

	$oid_next{".1.3.6.1.2.1.17.7.1.4"}=$oid;