mirror of
https://github.com/librenms/librenms.git
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119 lines
4.4 KiB
PHP
119 lines
4.4 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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echo "Spanning Tree: ";
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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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//d_echo($stp_db);
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$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($device, 'dot1dStp', array(), 'RSTP-MIB');
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$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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}
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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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}
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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 ($stp_raw[0]['version'] == '3') {
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echo "RSTP ";
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}
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else {
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echo "STP ";
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}
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if (!$stp_db['bridgeAddress'] && $stp['bridgeAddress']) {
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dbInsert($stp,'stp');
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log_event('STP added, bridge address: '.$stp['bridgeAddress'], $device, 'stp');
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echo '+';
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}
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if ($stp_db['bridgeAddress'] && !$stp['bridgeAddress']) {
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dbDelete('stp','device_id = ?', array($device['device_id']));
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log_event('STP removed', $device, 'stp');
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echo '-';
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}
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}
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unset($stp_raw, $stp, $stp_db);
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echo "\n";
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