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<?php |
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/* |
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* LibreNMS - SNMP Functions |
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* |
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* Original Observium code by: Adam Armstrong, Tom Laermans |
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* Copyright (c) 2010-2012 Adam Armstrong. |
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* |
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* Additions for LibreNMS by Paul Gear |
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* Copyright (c) 2014-2015 Gear Consulting Pty Ltd <http://libertysys.com.au/> |
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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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use App\Models\Device; |
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use Illuminate\Support\Str; |
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use LibreNMS\Config; |
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use LibreNMS\Util\Debug; |
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use Symfony\Component\Process\Exception\ProcessTimedOutException; |
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function string_to_oid($string) |
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{ |
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$oid = strlen($string); |
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for ($i = 0; $i != strlen($string); $i++) { |
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$oid .= '.' . ord($string[$i]); |
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} |
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return $oid; |
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}//end string_to_oid() |
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function prep_snmp_setting($device, $setting) |
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{ |
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if (isset($device[$setting]) && is_numeric($device[$setting]) && $device[$setting] > 0) { |
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return $device[$setting]; |
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} |
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return Config::get("snmp.$setting"); |
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}//end prep_snmp_setting() |
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/** |
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* @param array $device |
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* @return array will contain a list of mib dirs |
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*/ |
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function get_mib_dir($device) |
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{ |
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$dirs = []; |
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if (file_exists(Config::get('mib_dir') . '/' . $device['os'])) { |
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$dirs[] = Config::get('mib_dir') . '/' . $device['os']; |
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} |
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if (isset($device['os_group'])) { |
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if (file_exists(Config::get('mib_dir') . '/' . $device['os_group'])) { |
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$dirs[] = Config::get('mib_dir') . '/' . $device['os_group']; |
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} |
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if ($group_mibdir = Config::get("os_groups.{$device['os_group']}.mib_dir")) { |
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if (is_array($group_mibdir)) { |
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foreach ($group_mibdir as $k => $dir) { |
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$dirs[] = Config::get('mib_dir') . '/' . $dir; |
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} |
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} |
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} |
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} |
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if ($os_mibdir = Config::get("os.{$device['os']}.mib_dir")) { |
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$dirs[] = Config::get('mib_dir') . '/' . $os_mibdir; |
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} |
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return $dirs; |
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} |
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/** |
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* Generate the mib search directory argument for snmpcmd |
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* If null return the default mib dir |
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* If $mibdir is empty '', return an empty string |
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* |
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* @param string $mibdir should be the name of the directory within \LibreNMS\Config::get('mib_dir') |
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* @param array|null $device |
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* @return string The option string starting with -M |
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*/ |
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function mibdir($mibdir = null, $device = null) |
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{ |
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$dirs = is_array($device) ? get_mib_dir($device) : []; |
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$base = Config::get('mib_dir'); |
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$dirs[] = "$base/$mibdir"; |
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// make sure base directory is included first |
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array_unshift($dirs, $base); |
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// remove trailing /, remove empty dirs, and remove duplicates |
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$dirs = array_unique(array_filter(array_map(function ($dir) { |
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return rtrim($dir, '/'); |
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}, $dirs))); |
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return implode(':', $dirs); |
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}//end mibdir() |
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/** |
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* Generate an snmpget command |
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* |
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* @param array $device the we will be connecting to |
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* @param array|string $oids the oids to fetch, separated by spaces |
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* @param array|string $options extra snmp command options, usually this is output options |
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* @param string $mib an additional mib to add to this command |
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* @param string $mibdir a mib directory to search for mibs, usually prepended with + |
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* @return array the fully assembled command, ready to run |
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*/ |
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function gen_snmpget_cmd($device, $oids, $options = null, $mib = null, $mibdir = null) |
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{ |
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$snmpcmd = [Config::get('snmpget')]; |
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return gen_snmp_cmd($snmpcmd, $device, $oids, $options, $mib, $mibdir); |
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} // end gen_snmpget_cmd() |
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/** |
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* Generate an snmpwalk command |
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* |
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* @param array $device the we will be connecting to |
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* @param array|string $oids the oids to fetch, separated by spaces |
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* @param array|string $options extra snmp command options, usually this is output options |
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* @param string $mib an additional mib to add to this command |
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* @param string $mibdir a mib directory to search for mibs, usually prepended with + |
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* @return array the fully assembled command, ready to run |
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*/ |
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function gen_snmpwalk_cmd($device, $oids, $options = null, $mib = null, $mibdir = null, $strIndexing = null) |
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{ |
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if ($device['snmpver'] == 'v1' || (isset($device['os']) && Config::getOsSetting($device['os'], 'snmp_bulk', true) == false)) { |
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$snmpcmd = [Config::get('snmpwalk')]; |
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} else { |
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$snmpcmd = [Config::get('snmpbulkwalk')]; |
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$max_repeaters = get_device_max_repeaters($device); |
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if ($max_repeaters > 0) { |
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$snmpcmd[] = "-Cr$max_repeaters"; |
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} |
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} |
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return gen_snmp_cmd($snmpcmd, $device, $oids, $options, $mib, $mibdir, $strIndexing); |
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} //end gen_snmpwalk_cmd() |
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/** |
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* Generate an snmp command |
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* |
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* @param array $cmd the snmp command to run, like snmpget plus any additional arguments in an array |
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* @param array $device the we will be connecting to |
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* @param array|string $oids the oids to fetch, separated by spaces |
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* @param array|string $options extra snmp command options, usually this is output options |
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* @param string $mib an additional mib to add to this command |
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* @param string $mibdir a mib directory to search for mibs, usually prepended with + |
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* @return array the fully assembled command, ready to run |
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*/ |
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function gen_snmp_cmd($cmd, $device, $oids, $options = null, $mib = null, $mibdir = null, $strIndexing = null) |
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{ |
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if (! isset($device['transport'])) { |
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$device['transport'] = 'udp'; |
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} |
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$cmd = snmp_gen_auth($device, $cmd, $strIndexing); |
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$cmd = $options ? array_merge($cmd, (array) $options) : $cmd; |
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if ($mib) { |
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array_push($cmd, '-m', $mib); |
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} |
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array_push($cmd, '-M', mibdir($mibdir, $device)); |
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$timeout = prep_snmp_setting($device, 'timeout'); |
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if ($timeout && $timeout !== 1) { |
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array_push($cmd, '-t', $timeout); |
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} |
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$retries = prep_snmp_setting($device, 'retries'); |
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if ($retries && $retries !== 5) { |
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array_push($cmd, '-r', $retries); |
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} |
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$pollertarget = \LibreNMS\Util\Rewrite::addIpv6Brackets(Device::pollerTarget($device)); |
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$cmd[] = $device['transport'] . ':' . $pollertarget . ':' . $device['port']; |
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$cmd = array_merge($cmd, (array) $oids); |
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return $cmd; |
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} // end gen_snmp_cmd() |
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function snmp_get_multi($device, $oids, $options = '-OQUs', $mib = null, $mibdir = null, $array = []) |
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{ |
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$time_start = microtime(true); |
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if (! is_array($oids)) { |
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$oids = explode(' ', $oids); |
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} |
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$cmd = gen_snmpget_cmd($device, $oids, $options, $mib, $mibdir); |
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$data = trim(external_exec($cmd)); |
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foreach (explode("\n", $data) as $entry) { |
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[$oid,$value] = explode('=', $entry, 2); |
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$oid = trim($oid); |
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$value = trim($value, "\" \n\r"); |
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[$oid, $index] = explode('.', $oid, 2); |
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if (! Str::contains($value, 'at this OID')) { |
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if (is_null($index)) { |
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if (empty($oid)) { |
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continue; // no index or oid |
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} |
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$array[$oid] = $value; |
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} else { |
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$array[$index][$oid] = $value; |
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} |
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} |
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} |
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recordSnmpStatistic('snmpget', $time_start); |
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return $array; |
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}//end snmp_get_multi() |
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function snmp_get_multi_oid($device, $oids, $options = '-OUQn', $mib = null, $mibdir = null) |
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{ |
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$time_start = microtime(true); |
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$oid_limit = get_device_oid_limit($device); |
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if (! is_array($oids)) { |
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$oids = explode(' ', $oids); |
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} |
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$data = []; |
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foreach (array_chunk($oids, $oid_limit) as $chunk) { |
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$output = external_exec(gen_snmpget_cmd($device, $chunk, $options, $mib, $mibdir)); |
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$result = trim(str_replace('Wrong Type (should be OBJECT IDENTIFIER): ', '', $output)); |
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if ($result) { |
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$data = array_merge($data, explode("\n", $result)); |
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} |
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} |
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$array = []; |
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$oid = ''; |
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foreach ($data as $entry) { |
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if (Str::contains($entry, '=')) { |
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[$oid,$value] = explode('=', $entry, 2); |
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$oid = trim($oid); |
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$value = trim($value, "\\\" \n\r"); |
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if (! strstr($value, 'at this OID') && isset($oid)) { |
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$array[$oid] = $value; |
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} |
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} else { |
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if (isset($array[$oid])) { |
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// if appending, add a line return |
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$array[$oid] .= PHP_EOL . $entry; |
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} else { |
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$array[$oid] = $entry; |
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} |
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} |
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} |
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recordSnmpStatistic('snmpget', $time_start); |
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return $array; |
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}//end snmp_get_multi_oid() |
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/** |
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* Simple snmpget, returns the output of the get or false if the get failed. |
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* |
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* @param array $device |
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* @param array|string $oid |
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* @param array|string $options |
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* @param string $mib |
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* @param string $mibdir |
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* @return bool|string |
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*/ |
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function snmp_get($device, $oid, $options = null, $mib = null, $mibdir = null) |
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{ |
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$time_start = microtime(true); |
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if (strstr($oid, ' ')) { |
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throw new Exception("snmp_get called for multiple OIDs: $oid"); |
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} |
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$output = external_exec(gen_snmpget_cmd($device, $oid, $options, $mib, $mibdir)); |
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$output = str_replace('Wrong Type (should be OBJECT IDENTIFIER): ', '', $output); |
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$data = trim($output, "\\\" \n\r"); |
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recordSnmpStatistic('snmpget', $time_start); |
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if (preg_match('/(No Such Instance|No Such Object|No more variables left|Authentication failure)/i', $data)) { |
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return false; |
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} elseif ($data || $data === '0') { |
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return $data; |
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} else { |
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return false; |
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} |
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}//end snmp_get() |
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/** |
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* Calls snmpgetnext. Getnext returns the next oid after the specified oid. |
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* For example instead of get sysName.0, you can getnext sysName to get the .0 value. |
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* |
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* @param array $device Target device |
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* @param array|string $oid The oid to getnext |
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* @param array|string $options Options to pass to snmpgetnext (-Oqv for example) |
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* @param string $mib The MIB to use |
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* @param string $mibdir Optional mib directory to search |
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* @return string|false the output or false if the data could not be fetched |
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*/ |
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function snmp_getnext($device, $oid, $options = null, $mib = null, $mibdir = null) |
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{ |
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$time_start = microtime(true); |
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$snmpcmd = [Config::get('snmpgetnext', 'snmpgetnext')]; |
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$cmd = gen_snmp_cmd($snmpcmd, $device, $oid, $options, $mib, $mibdir); |
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$data = trim(external_exec($cmd), "\" \n\r"); |
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recordSnmpStatistic('snmpgetnext', $time_start); |
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if (preg_match('/(No Such Instance|No Such Object|No more variables left|Authentication failure)/i', $data)) { |
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return false; |
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} elseif ($data || $data === '0') { |
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return $data; |
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} |
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return false; |
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} |
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/** |
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* Calls snmpgetnext for multiple OIDs. Getnext returns the next oid after the specified oid. |
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* For example instead of get sysName.0, you can getnext sysName to get the .0 value. |
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* |
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* @param array $device Target device |
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* @param array $oids The oids to getnext |
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* @param string $options Options to pass to snmpgetnext (-OQUs for example) |
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* @param string $mib The MIB to use |
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* @param string $mibdir Optional mib directory to search |
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* @return array|false the output or false if the data could not be fetched |
334
|
|
|
*/ |
335
|
|
|
function snmp_getnext_multi($device, $oids, $options = '-OQUs', $mib = null, $mibdir = null, $array = []) |
336
|
|
|
{ |
337
|
|
|
$time_start = microtime(true); |
338
|
|
|
if (! is_array($oids)) { |
339
|
|
|
$oids = explode(' ', $oids); |
340
|
|
|
} |
341
|
|
|
$snmpcmd = [Config::get('snmpgetnext', 'snmpgetnext')]; |
342
|
|
|
$cmd = gen_snmp_cmd($snmpcmd, $device, $oids, $options, $mib, $mibdir); |
343
|
|
|
$data = trim(external_exec($cmd), "\" \n\r"); |
344
|
|
|
|
345
|
|
|
foreach (explode("\n", $data) as $entry) { |
346
|
|
|
[$oid,$value] = explode('=', $entry, 2); |
347
|
|
|
$oid = trim($oid); |
348
|
|
|
$value = trim($value, "\" \n\r"); |
349
|
|
|
[$oid, $index] = explode('.', $oid, 2); |
350
|
|
|
if (! Str::contains($value, 'at this OID')) { |
351
|
|
|
if (empty($oid)) { |
352
|
|
|
continue; // no index or oid |
353
|
|
|
} else { |
354
|
|
|
$array[$oid] = $value; |
355
|
|
|
} |
356
|
|
|
} |
357
|
|
|
} |
358
|
|
|
recordSnmpStatistic('snmpgetnext', $time_start); |
|
|
|
|
359
|
|
|
|
360
|
|
|
return $array; |
361
|
|
|
}//end snmp_getnext_multi() |
362
|
|
|
|
363
|
|
|
/** |
364
|
|
|
* @param $device |
365
|
|
|
* @return bool |
366
|
|
|
*/ |
367
|
|
|
function snmp_check($device) |
368
|
|
|
{ |
369
|
|
|
$time_start = microtime(true); |
370
|
|
|
|
371
|
|
|
try { |
372
|
|
|
$oid = '.1.3.6.1.2.1.1.2.0'; |
373
|
|
|
$cmd = gen_snmpget_cmd($device, $oid, '-Oqvn'); |
374
|
|
|
$proc = new \Symfony\Component\Process\Process($cmd); |
375
|
|
|
$proc->run(); |
376
|
|
|
$code = $proc->getExitCode(); |
377
|
|
|
Log::debug("SNMP Check response code: $code"); |
378
|
|
|
} catch (ProcessTimedOutException $e) { |
379
|
|
|
Log::debug("Device didn't respond to snmpget before {$e->getExceededTimeout()}s timeout"); |
380
|
|
|
} |
381
|
|
|
|
382
|
|
|
recordSnmpStatistic('snmpget', $time_start); |
383
|
|
|
|
384
|
|
|
if ($code === 0) { |
385
|
|
|
return true; |
386
|
|
|
} |
387
|
|
|
|
388
|
|
|
return false; |
389
|
|
|
}//end snmp_check() |
390
|
|
|
|
391
|
|
|
function snmp_walk($device, $oid, $options = null, $mib = null, $mibdir = null) |
392
|
|
|
{ |
393
|
|
|
$time_start = microtime(true); |
394
|
|
|
|
395
|
|
|
$cmd = gen_snmpwalk_cmd($device, $oid, $options, $mib, $mibdir); |
396
|
|
|
$data = trim(external_exec($cmd)); |
397
|
|
|
|
398
|
|
|
$data = str_replace('"', '', $data); |
399
|
|
|
$data = str_replace('End of MIB', '', $data); |
400
|
|
|
|
401
|
|
|
if (is_string($data) && preg_match('/No Such (Object|Instance)/i', $data)) { |
402
|
|
|
d_echo('Invalid snmp_walk() data = ' . print_r($data, true)); |
403
|
|
|
$data = false; |
404
|
|
|
} elseif (preg_match('/Wrong Type(.*)should be/', $data)) { |
405
|
|
|
$data = preg_replace('/Wrong Type \(should be .*\): /', '', $data); |
406
|
|
|
} else { |
407
|
|
|
if (Str::endsWith($data, '(It is past the end of the MIB tree)')) { |
408
|
|
|
$no_more_pattern = '/.*No more variables left in this MIB View \(It is past the end of the MIB tree\)[\n]?/'; |
409
|
|
|
$data = preg_replace($no_more_pattern, '', $data); |
410
|
|
|
} |
411
|
|
|
} |
412
|
|
|
|
413
|
|
|
recordSnmpStatistic('snmpwalk', $time_start); |
414
|
|
|
|
415
|
|
|
return $data; |
416
|
|
|
}//end snmp_walk() |
417
|
|
|
|
418
|
|
|
function snmpwalk_cache_cip($device, $oid, $array = [], $mib = 0) |
419
|
|
|
{ |
420
|
|
|
$cmd = gen_snmpwalk_cmd($device, $oid, '-OsnQ', $mib); |
421
|
|
|
$data = trim(external_exec($cmd)); |
422
|
|
|
|
423
|
|
|
// echo("Caching: $oid\n"); |
424
|
|
|
foreach (explode("\n", $data) as $entry) { |
425
|
|
|
[$this_oid, $this_value] = preg_split('/=/', $entry); |
426
|
|
|
$this_oid = trim($this_oid); |
427
|
|
|
$this_value = trim($this_value); |
428
|
|
|
$this_oid = substr($this_oid, 30); |
429
|
|
|
[$ifIndex, $dir, $a, $b, $c, $d, $e, $f] = explode('.', $this_oid); |
430
|
|
|
$h_a = zeropad(dechex($a)); |
431
|
|
|
$h_b = zeropad(dechex($b)); |
432
|
|
|
$h_c = zeropad(dechex($c)); |
433
|
|
|
$h_d = zeropad(dechex($d)); |
434
|
|
|
$h_e = zeropad(dechex($e)); |
435
|
|
|
$h_f = zeropad(dechex($f)); |
436
|
|
|
$mac = "$h_a$h_b$h_c$h_d$h_e$h_f"; |
437
|
|
|
|
438
|
|
|
if ($dir == '1') { |
439
|
|
|
$dir = 'input'; |
440
|
|
|
} elseif ($dir == '2') { |
441
|
|
|
$dir = 'output'; |
442
|
|
|
} |
443
|
|
|
|
444
|
|
|
if ($mac && $dir) { |
445
|
|
|
$array[$ifIndex][$mac][$oid][$dir] = $this_value; |
446
|
|
|
} |
447
|
|
|
}//end foreach |
448
|
|
|
|
449
|
|
|
return $array; |
450
|
|
|
}//end snmpwalk_cache_cip() |
451
|
|
|
|
452
|
|
|
function snmp_cache_ifIndex($device) |
453
|
|
|
{ |
454
|
|
|
// FIXME: this is not yet using our own snmp_* |
455
|
|
|
$cmd = gen_snmpwalk_cmd($device, 'ifIndex', '-OQs', 'IF-MIB'); |
456
|
|
|
$data = trim(external_exec($cmd)); |
457
|
|
|
|
458
|
|
|
$array = []; |
459
|
|
|
foreach (explode("\n", $data) as $entry) { |
460
|
|
|
[$this_oid, $this_value] = preg_split('/=/', $entry); |
461
|
|
|
[$this_oid, $this_index] = explode('.', $this_oid, 2); |
462
|
|
|
$this_index = trim($this_index); |
463
|
|
|
$this_oid = trim($this_oid); |
464
|
|
|
$this_value = trim($this_value); |
465
|
|
|
if (! strstr($this_value, 'at this OID') && $this_index) { |
466
|
|
|
$array[] = $this_value; |
467
|
|
|
} |
468
|
|
|
} |
469
|
|
|
|
470
|
|
|
return $array; |
471
|
|
|
}//end snmp_cache_ifIndex() |
472
|
|
|
|
473
|
|
|
function snmpwalk_cache_oid($device, $oid, $array, $mib = null, $mibdir = null, $snmpflags = '-OQUs') |
474
|
|
|
{ |
475
|
|
|
$data = snmp_walk($device, $oid, $snmpflags, $mib, $mibdir); |
476
|
|
|
foreach (explode("\n", $data) as $entry) { |
477
|
|
|
if (! Str::contains($entry, ' =') && ! empty($entry) && isset($index, $oid)) { |
478
|
|
|
$array[$index][$oid] .= "\n$entry"; |
479
|
|
|
continue; |
480
|
|
|
} |
481
|
|
|
|
482
|
|
|
[$oid,$value] = explode('=', $entry, 2); |
483
|
|
|
$oid = trim($oid); |
484
|
|
|
$value = trim($value, "\" \\\n\r"); |
485
|
|
|
[$oid, $index] = explode('.', $oid, 2); |
486
|
|
|
if (! strstr($value, 'at this OID') && ! empty($oid)) { |
487
|
|
|
$array[$index][$oid] = $value; |
488
|
|
|
} |
489
|
|
|
} |
490
|
|
|
|
491
|
|
|
return $array; |
492
|
|
|
}//end snmpwalk_cache_oid() |
493
|
|
|
|
494
|
|
|
function snmpwalk_cache_numerical_oid($device, $oid, $array, $mib = null, $mibdir = null, $snmpflags = '-OQUsn') |
495
|
|
|
{ |
496
|
|
|
$data = snmp_walk($device, $oid, $snmpflags, $mib, $mibdir); |
497
|
|
|
foreach (explode("\n", $data) as $entry) { |
498
|
|
|
[$oid,$value] = explode('=', $entry, 2); |
499
|
|
|
$oid = trim($oid); |
500
|
|
|
$value = trim($value); |
501
|
|
|
[$index,] = explode('.', strrev($oid), 2); |
502
|
|
|
if (! strstr($value, 'at this OID') && isset($oid) && isset($index)) { |
503
|
|
|
$array[$index][$oid] = $value; |
504
|
|
|
} |
505
|
|
|
} |
506
|
|
|
|
507
|
|
|
return $array; |
508
|
|
|
}//end snmpwalk_cache_oid() |
509
|
|
|
|
510
|
|
|
function snmpwalk_cache_long_oid($device, $oid, $noid, $array, $mib = null, $mibdir = null, $snmpflags = '-OQnU') |
511
|
|
|
{ |
512
|
|
|
$data = snmp_walk($device, $oid, $snmpflags, $mib, $mibdir); |
513
|
|
|
|
514
|
|
|
if (empty($data)) { |
515
|
|
|
return $array; |
516
|
|
|
} |
517
|
|
|
|
518
|
|
|
foreach (explode("\n", $data) as $entry) { |
519
|
|
|
[$tmp_oid,$value] = explode('=', $entry, 2); |
520
|
|
|
$tmp_oid = trim($tmp_oid); |
521
|
|
|
$value = trim($value); |
522
|
|
|
$tmp_index = str_replace($noid, '', $tmp_oid); |
523
|
|
|
$index = md5($tmp_index); |
524
|
|
|
if (! empty($index) && ! empty($oid)) { |
525
|
|
|
$array[$index][$oid] = $value; |
526
|
|
|
if (empty($array[$index]['orig'])) { |
527
|
|
|
$array[$index]['orig'] = $tmp_index; |
528
|
|
|
} |
529
|
|
|
} |
530
|
|
|
} |
531
|
|
|
|
532
|
|
|
return $array; |
533
|
|
|
}//end snmpwalk_cache_oid() |
534
|
|
|
|
535
|
|
|
/** |
536
|
|
|
* Just like snmpwalk_cache_oid except that it returns the numerical oid as the index |
537
|
|
|
* this is useful when the oid is indexed by the mac address and snmpwalk would |
538
|
|
|
* return periods (.) for non-printable numbers, thus making many different indexes appear |
539
|
|
|
* to be the same. |
540
|
|
|
* |
541
|
|
|
* @param array $device |
542
|
|
|
* @param string $oid |
543
|
|
|
* @param array $array Pass an array to add the cache to, useful for multiple calls |
544
|
|
|
* @param string $mib |
545
|
|
|
* @param string $mibdir |
546
|
|
|
* @return bool|array |
547
|
|
|
*/ |
548
|
|
|
function snmpwalk_cache_oid_num($device, $oid, $array, $mib = null, $mibdir = null) |
549
|
|
|
{ |
550
|
|
|
return snmpwalk_cache_oid($device, $oid, $array, $mib, $mibdir, $snmpflags = '-OQUn'); |
551
|
|
|
}//end snmpwalk_cache_oid_num() |
552
|
|
|
|
553
|
|
|
function snmpwalk_cache_multi_oid($device, $oid, $array, $mib = null, $mibdir = null, $snmpflags = '-OQUs') |
554
|
|
|
{ |
555
|
|
|
global $cache; |
556
|
|
|
|
557
|
|
|
if (! (is_array($cache['snmp'][$device['device_id']]) && array_key_exists($oid, $cache['snmp'][$device['device_id']]))) { |
558
|
|
|
$data = snmp_walk($device, $oid, $snmpflags, $mib, $mibdir); |
559
|
|
|
foreach (explode("\n", $data) as $entry) { |
560
|
|
|
[$r_oid,$value] = explode('=', $entry, 2); |
561
|
|
|
$r_oid = trim($r_oid); |
562
|
|
|
$value = trim($value); |
563
|
|
|
$oid_parts = explode('.', $r_oid); |
564
|
|
|
$r_oid = array_shift($oid_parts); |
565
|
|
|
$index = array_shift($oid_parts); |
566
|
|
|
foreach ($oid_parts as $tmp_oid) { |
567
|
|
|
$index .= '.' . $tmp_oid; |
568
|
|
|
} |
569
|
|
|
|
570
|
|
|
if (! strstr($value, 'at this OID') && isset($r_oid) && isset($index)) { |
571
|
|
|
$array[$index][$r_oid] = $value; |
572
|
|
|
} |
573
|
|
|
}//end foreach |
574
|
|
|
|
575
|
|
|
$cache['snmp'][$device['device_id']][$oid] = $array; |
576
|
|
|
}//end if |
577
|
|
|
|
578
|
|
|
return $cache['snmp'][$device['device_id']][$oid]; |
579
|
|
|
}//end snmpwalk_cache_multi_oid() |
580
|
|
|
|
581
|
|
|
function snmpwalk_cache_double_oid($device, $oid, $array, $mib = null, $mibdir = null) |
582
|
|
|
{ |
583
|
|
|
$data = snmp_walk($device, $oid, '-OQUs', $mib, $mibdir); |
584
|
|
|
|
585
|
|
|
foreach (explode("\n", $data) as $entry) { |
586
|
|
|
[$oid,$value] = explode('=', $entry, 2); |
587
|
|
|
$oid = trim($oid); |
588
|
|
|
$value = trim($value); |
589
|
|
|
[$oid, $first, $second] = explode('.', $oid); |
590
|
|
|
if (! strstr($value, 'at this OID') && isset($oid) && isset($first) && isset($second)) { |
591
|
|
|
$double = $first . '.' . $second; |
592
|
|
|
$array[$double][$oid] = $value; |
593
|
|
|
} |
594
|
|
|
} |
595
|
|
|
|
596
|
|
|
return $array; |
597
|
|
|
}//end snmpwalk_cache_double_oid() |
598
|
|
|
|
599
|
|
|
function snmpwalk_cache_index($device, $oid, $array, $mib = null, $mibdir = null) |
600
|
|
|
{ |
601
|
|
|
$data = snmp_walk($device, $oid, '-OQUs', $mib, $mibdir); |
602
|
|
|
|
603
|
|
|
foreach (explode("\n", $data) as $entry) { |
604
|
|
|
[$oid,$value] = explode('=', $entry, 2); |
605
|
|
|
$oid = trim($oid); |
606
|
|
|
$value = trim($value); |
607
|
|
|
[$oid, $first] = explode('.', $oid); |
608
|
|
|
if (! strstr($value, 'at this OID') && isset($oid) && isset($first)) { |
609
|
|
|
$array[$oid][$first] = $value; |
610
|
|
|
} |
611
|
|
|
} |
612
|
|
|
|
613
|
|
|
return $array; |
614
|
|
|
}//end snmpwalk_cache_double_oid() |
615
|
|
|
|
616
|
|
|
function snmpwalk_cache_triple_oid($device, $oid, $array, $mib = null, $mibdir = null) |
617
|
|
|
{ |
618
|
|
|
$data = snmp_walk($device, $oid, '-OQUs', $mib, $mibdir); |
619
|
|
|
|
620
|
|
|
foreach (explode("\n", $data) as $entry) { |
621
|
|
|
[$oid,$value] = explode('=', $entry, 2); |
622
|
|
|
$oid = trim($oid); |
623
|
|
|
$value = trim($value); |
624
|
|
|
[$oid, $first, $second, $third] = explode('.', $oid); |
625
|
|
|
if (! strstr($value, 'at this OID') && isset($oid) && isset($first) && isset($second)) { |
626
|
|
|
$index = $first . '.' . $second . '.' . $third; |
627
|
|
|
$array[$index][$oid] = $value; |
628
|
|
|
} |
629
|
|
|
} |
630
|
|
|
|
631
|
|
|
return $array; |
632
|
|
|
}//end snmpwalk_cache_triple_oid() |
633
|
|
|
|
634
|
|
|
/** |
635
|
|
|
* Walk an snmp mib oid and group items together based on the index. |
636
|
|
|
* This is intended to be used with a string based oid. |
637
|
|
|
* Any extra index data past $depth will be added after the oidName to keep grouping consistent. |
638
|
|
|
* |
639
|
|
|
* Example: |
640
|
|
|
* snmpwalk_group($device, 'ifTable', 'IF-MIB'); |
641
|
|
|
* [ |
642
|
|
|
* 1 => [ 'ifIndex' => '1', 'ifDescr' => 'lo', 'ifMtu' => '65536', ...], |
643
|
|
|
* 2 => [ 'ifIndex' => '2', 'ifDescr' => 'enp0s25', 'ifMtu' => '1500', ...], |
644
|
|
|
* ] |
645
|
|
|
* |
646
|
|
|
* @param array $device Target device |
647
|
|
|
* @param string $oid The string based oid to walk |
648
|
|
|
* @param string $mib The MIB to use |
649
|
|
|
* @param int $depth how many indexes to group |
650
|
|
|
* @param array $array optionally insert the entries into an existing array (helpful for grouping multiple walks) |
651
|
|
|
* @param string $mibdir custom mib dir to search for mib |
652
|
|
|
* @return array grouped array of data |
653
|
|
|
*/ |
654
|
|
|
function snmpwalk_group($device, $oid, $mib = '', $depth = 1, $array = [], $mibdir = null, $strIndexing = null) |
655
|
|
|
{ |
656
|
|
|
d_echo("communityStringIndexing $strIndexing\n"); |
657
|
|
|
$cmd = gen_snmpwalk_cmd($device, $oid, '-OQUsetX', $mib, $mibdir, $strIndexing); |
658
|
|
|
$data = rtrim(external_exec($cmd)); |
659
|
|
|
|
660
|
|
|
$line = strtok($data, "\n"); |
661
|
|
|
while ($line !== false) { |
662
|
|
|
if (Str::contains($line, 'at this OID') || Str::contains($line, 'this MIB View')) { |
663
|
|
|
$line = strtok("\n"); |
664
|
|
|
continue; |
665
|
|
|
} |
666
|
|
|
|
667
|
|
|
[$address, $value] = explode(' =', $line, 2); |
668
|
|
|
preg_match_all('/([^[\]]+)/', $address, $parts); |
669
|
|
|
$parts = $parts[1]; |
670
|
|
|
array_splice($parts, $depth, 0, array_shift($parts)); // move the oid name to the correct depth |
671
|
|
|
|
672
|
|
|
$line = strtok("\n"); // get the next line and concatenate multi-line values |
673
|
|
|
while ($line !== false && ! Str::contains($line, '=')) { |
674
|
|
|
$value .= $line . PHP_EOL; |
675
|
|
|
$line = strtok("\n"); |
676
|
|
|
} |
677
|
|
|
|
678
|
|
|
// merge the parts into an array, creating keys if they don't exist |
679
|
|
|
$tmp = &$array; |
680
|
|
|
foreach ($parts as $part) { |
681
|
|
|
// we don't want to remove dots inside quotes, only outside |
682
|
|
|
$key = trim(trim($part, '.'), '"'); |
683
|
|
|
$tmp = &$tmp[$key]; |
684
|
|
|
} |
685
|
|
|
$tmp = trim($value, "\" \n\r"); // assign the value as the leaf |
686
|
|
|
} |
687
|
|
|
|
688
|
|
|
return $array; |
689
|
|
|
} |
690
|
|
|
|
691
|
|
|
function snmpwalk_cache_twopart_oid($device, $oid, $array, $mib = 0, $mibdir = null, $snmpflags = '-OQUs') |
692
|
|
|
{ |
693
|
|
|
$cmd = gen_snmpwalk_cmd($device, $oid, $snmpflags, $mib, $mibdir); |
694
|
|
|
$data = trim(external_exec($cmd)); |
695
|
|
|
|
696
|
|
|
foreach (explode("\n", $data) as $entry) { |
697
|
|
|
[$oid,$value] = explode('=', $entry, 2); |
698
|
|
|
$oid = trim($oid); |
699
|
|
|
$value = trim($value); |
700
|
|
|
$value = str_replace('"', '', $value); |
701
|
|
|
[$oid, $first, $second] = explode('.', $oid); |
702
|
|
|
if (! strstr($value, 'at this OID') && isset($oid) && isset($first) && isset($second)) { |
703
|
|
|
$array[$first][$second][$oid] = $value; |
704
|
|
|
} |
705
|
|
|
} |
706
|
|
|
|
707
|
|
|
return $array; |
708
|
|
|
}//end snmpwalk_cache_twopart_oid() |
709
|
|
|
|
710
|
|
|
function snmpwalk_cache_threepart_oid($device, $oid, $array, $mib = 0) |
711
|
|
|
{ |
712
|
|
|
$cmd = gen_snmpwalk_cmd($device, $oid, '-OQUs', $mib); |
713
|
|
|
$data = trim(external_exec($cmd)); |
714
|
|
|
|
715
|
|
|
foreach (explode("\n", $data) as $entry) { |
716
|
|
|
[$oid,$value] = explode('=', $entry, 2); |
717
|
|
|
$oid = trim($oid); |
718
|
|
|
$value = trim($value); |
719
|
|
|
$value = str_replace('"', '', $value); |
720
|
|
|
[$oid, $first, $second, $third] = explode('.', $oid); |
721
|
|
|
|
722
|
|
|
if (Debug::isEnabled()) { |
723
|
|
|
echo "$entry || $oid || $first || $second || $third\n"; |
724
|
|
|
} |
725
|
|
|
|
726
|
|
|
if (! strstr($value, 'at this OID') && isset($oid) && isset($first) && isset($second) && isset($third)) { |
727
|
|
|
$array[$first][$second][$third][$oid] = $value; |
728
|
|
|
} |
729
|
|
|
} |
730
|
|
|
|
731
|
|
|
return $array; |
732
|
|
|
}//end snmpwalk_cache_threepart_oid() |
733
|
|
|
|
734
|
|
|
/** |
735
|
|
|
* generate snmp auth arguments |
736
|
|
|
* |
737
|
|
|
* @param array $device |
738
|
|
|
* @param array $cmd |
739
|
|
|
* @return array |
740
|
|
|
*/ |
741
|
|
|
function snmp_gen_auth(&$device, $cmd = [], $strIndexing = null) |
742
|
|
|
{ |
743
|
|
|
if ($device['snmpver'] === 'v3') { |
744
|
|
|
array_push($cmd, '-v3', '-l', $device['authlevel']); |
745
|
|
|
array_push($cmd, '-n', isset($device['context_name']) ? $device['context_name'] : ''); |
746
|
|
|
|
747
|
|
|
$authlevel = strtolower($device['authlevel']); |
748
|
|
|
if ($authlevel === 'noauthnopriv') { |
749
|
|
|
// We have to provide a username anyway (see Net-SNMP doc) |
750
|
|
|
array_push($cmd, '-u', ! empty($device['authname']) ? $device['authname'] : 'root'); |
751
|
|
|
} elseif ($authlevel === 'authnopriv') { |
752
|
|
|
array_push($cmd, '-a', $device['authalgo']); |
753
|
|
|
array_push($cmd, '-A', $device['authpass']); |
754
|
|
|
array_push($cmd, '-u', $device['authname']); |
755
|
|
|
} elseif ($authlevel === 'authpriv') { |
756
|
|
|
array_push($cmd, '-a', $device['authalgo']); |
757
|
|
|
array_push($cmd, '-A', $device['authpass']); |
758
|
|
|
array_push($cmd, '-u', $device['authname']); |
759
|
|
|
array_push($cmd, '-x', $device['cryptoalgo']); |
760
|
|
|
array_push($cmd, '-X', $device['cryptopass']); |
761
|
|
|
} else { |
762
|
|
|
d_echo('DEBUG: ' . $device['snmpver'] . " : Unsupported SNMPv3 AuthLevel (wtf have you done ?)\n"); |
763
|
|
|
} |
764
|
|
|
} elseif ($device['snmpver'] === 'v2c' || $device['snmpver'] === 'v1') { |
765
|
|
|
array_push($cmd, '-' . $device['snmpver'], '-c', $device['community'] . ($strIndexing != null ? '@' . $strIndexing : null)); |
766
|
|
|
} else { |
767
|
|
|
d_echo('DEBUG: ' . $device['snmpver'] . " : Unsupported SNMP Version (shouldn't be possible to get here)\n"); |
768
|
|
|
} |
769
|
|
|
|
770
|
|
|
return $cmd; |
771
|
|
|
}//end snmp_gen_auth() |
772
|
|
|
|
773
|
|
|
/** |
774
|
|
|
* SNMP translate between numeric and textual oids |
775
|
|
|
* |
776
|
|
|
* Default options for a numeric oid is -Os |
777
|
|
|
* Default options for a textual oid is -On |
778
|
|
|
* You may override these by setting $options (an empty string for no options) |
779
|
|
|
* |
780
|
|
|
* @param string $oid |
781
|
|
|
* @param string $mib |
782
|
|
|
* @param string $mibdir the mib directory (relative to the LibreNMS mibs directory) |
783
|
|
|
* @param array|string $options Options to pass to snmptranslate |
784
|
|
|
* @param array|null $device |
785
|
|
|
* @return string |
786
|
|
|
*/ |
787
|
|
|
function snmp_translate($oid, $mib = 'ALL', $mibdir = null, $options = null, $device = null) |
788
|
|
|
{ |
789
|
|
|
$cmd = [Config::get('snmptranslate', 'snmptranslate'), '-M', mibdir($mibdir, $device), '-m', $mib]; |
790
|
|
|
|
791
|
|
|
if (oid_is_numeric($oid)) { |
792
|
|
|
$default_options = ['-Os', '-Pu']; |
793
|
|
|
} else { |
794
|
|
|
if ($mib != 'ALL' && ! Str::contains($oid, '::')) { |
795
|
|
|
$oid = "$mib::$oid"; |
796
|
|
|
} |
797
|
|
|
$default_options = ['-On', '-Pu']; |
798
|
|
|
} |
799
|
|
|
$options = is_null($options) ? $default_options : $options; |
800
|
|
|
$cmd = array_merge($cmd, (array) $options); |
801
|
|
|
$cmd[] = $oid; |
802
|
|
|
|
803
|
|
|
return trim(external_exec($cmd)); |
804
|
|
|
} |
805
|
|
|
|
806
|
|
|
/** |
807
|
|
|
* SNMPWalk_array_num - performs a numeric SNMPWalk and returns an array containing $count indexes |
808
|
|
|
* One Index: |
809
|
|
|
* From: 1.3.6.1.4.1.9.9.166.1.15.1.1.27.18.655360 = 0 |
810
|
|
|
* To: $array['1.3.6.1.4.1.9.9.166.1.15.1.1.27.18']['655360'] = 0 |
811
|
|
|
* Two Indexes: |
812
|
|
|
* From: 1.3.6.1.4.1.9.9.166.1.15.1.1.27.18.655360 = 0 |
813
|
|
|
* To: $array['1.3.6.1.4.1.9.9.166.1.15.1.1.27']['18']['655360'] = 0 |
814
|
|
|
* And so on... |
815
|
|
|
* Think snmpwalk_cache_*_oid but for numeric data. |
816
|
|
|
* |
817
|
|
|
* Why is this useful? |
818
|
|
|
* Some SNMP data contains a single index (eg. ifIndex in IF-MIB) and some is dual indexed |
819
|
|
|
* (eg. PolicyIndex/ObjectsIndex in CISCO-CLASS-BASED-QOS-MIB). |
820
|
|
|
* The resulting array allows us to easily access the top level index we want and iterate over the data from there. |
821
|
|
|
* |
822
|
|
|
* @param $device |
823
|
|
|
* @param $OID |
824
|
|
|
* @param int $indexes |
825
|
|
|
* |
826
|
|
|
* @internal param $string |
827
|
|
|
* |
828
|
|
|
* @return bool|array |
829
|
|
|
*/ |
830
|
|
|
function snmpwalk_array_num($device, $oid, $indexes = 1) |
831
|
|
|
{ |
832
|
|
|
$array = []; |
833
|
|
|
$string = snmp_walk($device, $oid, '-Osqn'); |
834
|
|
|
|
835
|
|
|
if ($string === false) { |
836
|
|
|
// False means: No Such Object. |
837
|
|
|
return false; |
838
|
|
|
} |
839
|
|
|
if ($string == '') { |
840
|
|
|
// Empty means SNMP timeout or some such. |
841
|
|
|
return null; |
842
|
|
|
} |
843
|
|
|
|
844
|
|
|
// Let's turn the string into something we can work with. |
845
|
|
|
foreach (explode("\n", $string) as $line) { |
846
|
|
|
if ($line[0] == '.') { |
847
|
|
|
// strip the leading . if it exists. |
848
|
|
|
$line = substr($line, 1); |
849
|
|
|
} |
850
|
|
|
[$key, $value] = explode(' ', $line, 2); |
851
|
|
|
$prop_id = explode('.', $key); |
852
|
|
|
$value = trim($value); |
853
|
|
|
|
854
|
|
|
// if we have requested more levels that exist, set to the max. |
855
|
|
|
if ($indexes > count($prop_id)) { |
856
|
|
|
$indexes = count($prop_id) - 1; |
857
|
|
|
} |
858
|
|
|
|
859
|
|
|
for ($i = 0; $i < $indexes; $i++) { |
860
|
|
|
// Pop the index off. |
861
|
|
|
$index = array_pop($prop_id); |
862
|
|
|
$value = [$index => $value]; |
863
|
|
|
} |
864
|
|
|
|
865
|
|
|
// Rebuild our key |
866
|
|
|
$key = implode('.', $prop_id); |
867
|
|
|
|
868
|
|
|
// Add the entry to the master array |
869
|
|
|
$array = array_replace_recursive($array, [$key => $value]); |
870
|
|
|
} |
871
|
|
|
|
872
|
|
|
return $array; |
873
|
|
|
} |
874
|
|
|
|
875
|
|
|
/** |
876
|
|
|
* @param $device |
877
|
|
|
* @return bool |
878
|
|
|
*/ |
879
|
|
|
function get_device_max_repeaters($device) |
880
|
|
|
{ |
881
|
|
|
return $device['attribs']['snmp_max_repeaters'] ?? |
882
|
|
|
Config::getOsSetting($device['os'], 'snmp.max_repeaters', Config::get('snmp.max_repeaters', false)); |
883
|
|
|
} |
884
|
|
|
|
885
|
|
|
/** |
886
|
|
|
* Check if a given oid is numeric. |
887
|
|
|
* |
888
|
|
|
* @param string $oid |
889
|
|
|
* @return bool |
890
|
|
|
*/ |
891
|
|
|
function oid_is_numeric($oid) |
892
|
|
|
{ |
893
|
|
|
return \LibreNMS\Device\YamlDiscovery::oidIsNumeric($oid); |
894
|
|
|
} |
895
|
|
|
|