189 lines
8.2 KiB
PHP
189 lines
8.2 KiB
PHP
<?php
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/*
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* LibreNMS
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*
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* Copyright (c) 2015 Vitali Kari <vitali.kari@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version. Please see LICENSE.txt at the top level of
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* the source code distribution for details.
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*
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* Based on IEEE-802.1D-2004, (STP, RSTP)
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* needs RSTP-MIB
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*/
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// Pre-cache existing state of STP for this device from database
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$stp_db = dbFetchRow('SELECT * FROM `stp` WHERE `device_id` = ?', array($device['device_id']));
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$stpprotocol = snmp_get($device, 'dot1dStpProtocolSpecification.0', '-Oqv', 'RSTP-MIB');
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// FIXME I don't know what "unknown" means, perhaps MSTP? (saw it on some cisco devices)
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// But we can try to retrieve data
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if ($stpprotocol == 'ieee8021d' || $stpprotocol == 'unknown') {
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// set time multiplier to convert from centiseconds to seconds
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// all time values are stored in databese as seconds
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$tm = '0.01';
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// some vendors like PBN dont follow the 802.1D implementation and use seconds in SNMP
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if ($device['os'] == 'pbn') {
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preg_match('/^.* Build (?<build>\d+)/', $device['version'], $version);
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if ($version['build'] <= 16607) { // Buggy version :-(
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$tm = '1';
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}
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}
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// read the 802.1D subtree
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$stp_raw = snmpwalk_cache_oid($device, 'dot1dStp', array(), 'RSTP-MIB');
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d_echo($stp_raw);
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$stp = array(
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'protocolSpecification' => $stp_raw[0]['dot1dStpProtocolSpecification'],
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'priority' => $stp_raw[0]['dot1dStpPriority'],
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'topChanges' => $stp_raw[0]['dot1dStpTopChanges'],
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'rootCost' => $stp_raw[0]['dot1dStpRootCost'],
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'rootPort' => $stp_raw[0]['dot1dStpRootPort'],
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'maxAge' => $stp_raw[0]['dot1dStpMaxAge'] * $tm,
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'helloTime' => $stp_raw[0]['dot1dStpHelloTime'] * $tm,
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'holdTime' => $stp_raw[0]['dot1dStpHoldTime'] * $tm,
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'forwardDelay' => $stp_raw[0]['dot1dStpForwardDelay'] * $tm,
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'bridgeMaxAge' => $stp_raw[0]['dot1dStpBridgeMaxAge'] * $tm,
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'bridgeHelloTime' => $stp_raw[0]['dot1dStpBridgeHelloTime'] * $tm,
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'bridgeForwardDelay' => $stp_raw[0]['dot1dStpBridgeForwardDelay'] * $tm
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);
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// set device binding
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$stp['device_id'] = $device['device_id'];
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// read the 802.1D bridge address and set as MAC in database
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$mac_raw = snmp_get($device, 'dot1dBaseBridgeAddress.0', '-Oqv', 'RSTP-MIB');
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// read Time as timetics (in hundredths of a seconds) since last topology change and convert to seconds
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$time_since_change = snmp_get($device, 'dot1dStpTimeSinceTopologyChange.0', '-Ovt', 'RSTP-MIB');
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if ($time_since_change > '100') {
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$time_since_change = substr($time_since_change, 0, -2); // convert to seconds since change
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} else {
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$time_since_change = '0';
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}
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$stp['timeSinceTopologyChange'] = $time_since_change;
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// designated root is stored in format 2 octet bridge priority + MAC address, so we need to normalize it
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$dr = str_replace(array(' ', ':', '-'), '', strtolower($stp_raw[0]['dot1dStpDesignatedRoot']));
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$dr = substr($dr, -12); //remove first two octets
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$stp['designatedRoot'] = $dr;
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// normalize the MAC
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$mac_array = explode(':', $mac_raw);
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foreach ($mac_array as &$octet) {
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if (strlen($octet) < 2) {
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$octet = "0" . $octet; // add suppressed 0
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}
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}
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$stp['bridgeAddress'] = implode($mac_array);
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// I'm the boss?
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if ($stp['bridgeAddress'] == $stp['designatedRoot']) {
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$stp['rootBridge'] = '1';
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} else {
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$stp['rootBridge'] = '0';
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}
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d_echo($stp);
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if ($stp_db['bridgeAddress'] && $stp['bridgeAddress']) {
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// Logging if designated root changed since last db update
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if ($stp_db['designatedRoot'] != $stp['designatedRoot']) {
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log_event('STP designated root changed: ' . $stp_db['designatedRoot'] . ' > ' . $stp['designatedRoot'], $device, 'stp', 4);
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}
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// Logging if designated root port changed since last db update
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if (isset($stp['rootPort']) && $stp_db['rootPort'] != $stp['rootPort']) {
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log_event('STP root port changed: ' . $stp_db['rootPort'] . ' > ' . $stp['rootPort'], $device, 'stp', 4);
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}
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// Logging if topology changed since last db update
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if ($stp_db['timeSinceTopologyChange'] > $stp['timeSinceTopologyChange']) {
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// FIXME log_event should log really changing time, not polling time
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// but upstream function do not care about this at the moment.
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//
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// saw same problem with this line librenms/includes/polling/system.inc.php
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// log_event('Device rebooted after '.formatUptime($device['uptime']), $device, 'reboot', $device['uptime']);
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// ToDo fix log_event()
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//
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//log_event('STP topology changed after: '.formatUptime($stp['timeSinceTopologyChange']), $device, 'stp', $stp['timeSinceTopologyChange']);
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log_event('STP topology changed after: ' . formatUptime($stp['timeSinceTopologyChange']), $device, 'stp', 4);
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}
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// Write to db
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dbUpdate($stp, 'stp', 'device_id = ?', array($device['device_id']));
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echo '.';
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}
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// STP port related stuff
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foreach ($stp_raw as $port => $value) {
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if ($port) { // $stp_raw[0] ist not port related so we skip this one
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$stp_port = array(
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'priority' => $stp_raw[$port]['dot1dStpPortPriority'],
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'state' => $stp_raw[$port]['dot1dStpPortState'],
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'enable' => $stp_raw[$port]['dot1dStpPortEnable'],
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'pathCost' => $stp_raw[$port]['dot1dStpPortPathCost'],
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'designatedCost' => $stp_raw[$port]['dot1dStpPortDesignatedCost'],
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'designatedPort' => $stp_raw[$port]['dot1dStpPortDesignatedPort'],
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'forwardTransitions' => $stp_raw[$port]['dot1dStpPortForwardTransitions']
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);
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// set device binding
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$stp_port['device_id'] = $device['device_id'];
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// set port binding
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$stp_port['port_id'] = dbFetchCell('SELECT port_id FROM `ports` WHERE `device_id` = ? AND `ifIndex` = ?', array($device['device_id'], $stp_raw[$port]['dot1dStpPort']));
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$dr = str_replace(array(' ', ':', '-'), '', strtolower($stp_raw[$port]['dot1dStpPortDesignatedRoot']));
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$dr = substr($dr, -12); //remove first two octets
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$stp_port['designatedRoot'] = $dr;
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$db = str_replace(array(' ', ':', '-'), '', strtolower($stp_raw[$port]['dot1dStpPortDesignatedBridge']));
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$db = substr($db, -12); //remove first two octets
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$stp_port['designatedBridge'] = $db;
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if ($device['os'] == 'pbn') {
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// It seems that PBN guys don't care about ieee 802.1d :-(
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// So try to find the right port with some crazy conversations
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$dp_value = dechex($stp_port['priority']);
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$dp_value = $dp_value.'00';
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$dp_value = hexdec($dp_value);
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if ($stp_raw[$port]['dot1dStpPortDesignatedPort']) {
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$dp = $stp_raw[$port]['dot1dStpPortDesignatedPort'] - $dp_value;
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$stp_port['designatedPort'] = $dp;
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}
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} else {
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// Port saved in format priority+port (ieee 802.1d-1998: clause 8.5.5.1)
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$dp = substr($stp_raw[$port]['dot1dStpPortDesignatedPort'], -2); //discard the first octet (priority part)
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$stp_port['designatedPort'] = hexdec($dp);
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}
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//d_echo($stp_port);
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// Update db
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dbUpdate($stp_port, 'ports_stp', '`device_id` = ? AND `port_id` = ?', array($device['device_id'], $stp_port['port_id']));
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echo '.';
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}
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}
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}
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unset(
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$stp_raw,
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$stp,
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$stp_db,
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$stp_port,
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$mac_array,
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$stpprotocol,
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$tm,
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$mac_raw,
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$time_since_change,
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$dr,
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$octet,
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$port,
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$db,
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$dp
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);
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echo "\n";
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