librenms/includes/snmp.inc.php
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1351 lines
40 KiB
PHP

<?php
/*
* LibreNMS - SNMP Functions
*
* Original Observium code by: Adam Armstrong, Tom Laermans
* Copyright (c) 2010-2012 Adam Armstrong.
*
* Additions for LibreNMS by Paul Gear
* Copyright (c) 2014-2015 Gear Consulting Pty Ltd <http://libertysys.com.au/>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at your
* option) any later version. Please see LICENSE.txt at the top level of
* the source code distribution for details.
*/
function string_to_oid($string)
{
$oid = strlen($string);
for ($i = 0; $i != strlen($string); $i++) {
$oid .= '.'.ord($string[$i]);
}
return $oid;
}//end string_to_oid()
function prep_snmp_setting($device, $setting)
{
global $config;
if (is_numeric($device[$setting]) && $device[$setting] > 0) {
return $device[$setting];
} elseif (isset($config['snmp'][$setting])) {
return $config['snmp'][$setting];
}
}//end prep_snmp_setting()
function mibdir($mibdir)
{
global $config;
return ' -M '.($mibdir ? $mibdir : $config['mibdir']);
}//end mibdir()
function snmp_get_multi($device, $oids, $options = '-OQUs', $mib = null, $mibdir = null)
{
global $debug,$config,$runtime_stats,$mibs_loaded;
// populate timeout & retries values from configuration
$timeout = prep_snmp_setting($device, 'timeout');
$retries = prep_snmp_setting($device, 'retries');
if (!isset($device['transport'])) {
$device['transport'] = 'udp';
}
$cmd = $config['snmpget'];
$cmd .= snmp_gen_auth($device);
if ($options) {
$cmd .= ' '.$options;
}
if ($mib) {
$cmd .= ' -m '.$mib;
}
$cmd .= mibdir($mibdir);
$cmd .= isset($timeout) ? ' -t '.$timeout : '';
$cmd .= isset($retries) ? ' -r '.$retries : '';
$cmd .= ' '.$device['transport'].':'.$device['hostname'].':'.$device['port'];
if (is_array($oids)) {
$oids = implode(' ', $oids);
}
$cmd .= ' '.$oids;
if (!$debug) {
$cmd .= ' 2>/dev/null';
}
$data = trim(external_exec($cmd));
$runtime_stats['snmpget']++;
$array = array();
foreach (explode("\n", $data) as $entry) {
list($oid,$value) = explode('=', $entry, 2);
$oid = trim($oid);
$value = trim($value);
list($oid, $index) = explode('.', $oid, 2);
if (!strstr($value, 'at this OID') && isset($oid) && isset($index)) {
$array[$index][$oid] = $value;
}
}
return $array;
}//end snmp_get_multi()
function snmp_get($device, $oid, $options = null, $mib = null, $mibdir = null)
{
global $debug,$config,$runtime_stats,$mibs_loaded;
$timeout = prep_snmp_setting($device, 'timeout');
$retries = prep_snmp_setting($device, 'retries');
if (!isset($device['transport'])) {
$device['transport'] = 'udp';
}
if (strstr($oid, ' ')) {
echo report_this_text("snmp_get called for multiple OIDs: $oid");
}
$cmd = $config['snmpget'];
$cmd .= snmp_gen_auth($device);
if ($options) {
$cmd .= ' '.$options;
}
if ($mib) {
$cmd .= ' -m '.$mib;
}
$cmd .= mibdir($mibdir);
$cmd .= isset($timeout) ? ' -t '.$timeout : '';
$cmd .= isset($retries) ? ' -r '.$retries : '';
$cmd .= ' '.$device['transport'].':'.$device['hostname'].':'.$device['port'];
$cmd .= ' '.$oid;
if (!$debug) {
$cmd .= ' 2>/dev/null';
}
$data = trim(external_exec($cmd));
$runtime_stats['snmpget']++;
if (is_string($data) && (preg_match('/(No Such Instance|No Such Object|No more variables left|Authentication failure)/i', $data))) {
return false;
} elseif ($data || $data === '0') {
return $data;
} else {
return false;
}
}//end snmp_get()
function snmp_walk($device, $oid, $options = null, $mib = null, $mibdir = null)
{
global $debug,$config,$runtime_stats;
$timeout = prep_snmp_setting($device, 'timeout');
$retries = prep_snmp_setting($device, 'retries');
if (!isset($device['transport'])) {
$device['transport'] = 'udp';
}
if ($device['snmpver'] == 'v1' || $config['os'][$device['os']]['nobulk']) {
$snmpcommand = $config['snmpwalk'];
} else {
$snmpcommand = $config['snmpbulkwalk'];
$max_repeaters = $device['snmp_max_repeaters'];
if ($max_repeaters > 0) {
$snmpcommand .= " -Cr$max_repeaters ";
}
}
$cmd = $snmpcommand;
$cmd .= snmp_gen_auth($device);
if ($options) {
$cmd .= " $options ";
}
if ($mib) {
$cmd .= " -m $mib";
}
$cmd .= mibdir($mibdir);
$cmd .= isset($timeout) ? ' -t '.$timeout : '';
$cmd .= isset($retries) ? ' -r '.$retries : '';
$cmd .= ' '.$device['transport'].':'.$device['hostname'].':'.$device['port'].' '.$oid;
if (!$debug) {
$cmd .= ' 2>/dev/null';
}
$data = trim(external_exec($cmd));
$data = str_replace('"', '', $data);
$data = str_replace('End of MIB', '', $data);
if (is_string($data) && (preg_match('/No Such (Object|Instance)/i', $data))) {
$data = false;
} else {
if (preg_match('/No more variables left in this MIB View \(It is past the end of the MIB tree\)$/', $data)) {
// Bit ugly :-(
$d_ex = explode("\n", $data);
unset($d_ex[(count($d_ex) - 1)]);
$data = implode("\n", $d_ex);
}
}
$runtime_stats['snmpwalk']++;
return $data;
}//end snmp_walk()
function snmpwalk_cache_cip($device, $oid, $array = array(), $mib = 0)
{
global $config, $debug;
$timeout = prep_snmp_setting($device, 'timeout');
$retries = prep_snmp_setting($device, 'retries');
if (!isset($device['transport'])) {
$device['transport'] = 'udp';
}
if ($device['snmpver'] == 'v1' || $config['os'][$device['os']]['nobulk']) {
$snmpcommand = $config['snmpwalk'];
} else {
$snmpcommand = $config['snmpbulkwalk'];
$max_repeaters = $device['snmp_max_repeaters'];
if ($max_repeaters > 0) {
$snmpcommand .= " -Cr$max_repeaters ";
}
}
$cmd = $snmpcommand;
$cmd .= snmp_gen_auth($device);
$cmd .= ' -O snQ';
if ($mib) {
$cmd .= " -m $mib";
}
$cmd .= mibdir(null);
$cmd .= isset($timeout) ? ' -t '.$timeout : '';
$cmd .= isset($retries) ? ' -r '.$retries : '';
$cmd .= ' '.$device['transport'].':'.$device['hostname'].':'.$device['port'].' '.$oid;
if (!$debug) {
$cmd .= ' 2>/dev/null';
}
$data = trim(external_exec($cmd));
// echo("Caching: $oid\n");
foreach (explode("\n", $data) as $entry) {
list ($this_oid, $this_value) = preg_split('/=/', $entry);
$this_oid = trim($this_oid);
$this_value = trim($this_value);
$this_oid = substr($this_oid, 30);
list($ifIndex, $dir, $a, $b, $c, $d, $e, $f) = explode('.', $this_oid);
$h_a = zeropad(dechex($a));
$h_b = zeropad(dechex($b));
$h_c = zeropad(dechex($c));
$h_d = zeropad(dechex($d));
$h_e = zeropad(dechex($e));
$h_f = zeropad(dechex($f));
$mac = "$h_a$h_b$h_c$h_d$h_e$h_f";
if ($dir == '1') {
$dir = 'input';
} elseif ($dir == '2') {
$dir = 'output';
}
if ($mac && $dir) {
$array[$ifIndex][$mac][$oid][$dir] = $this_value;
}
}//end foreach
return $array;
}//end snmpwalk_cache_cip()
function snmp_cache_ifIndex($device)
{
// FIXME: this is not yet using our own snmp_*
global $config, $debug;
$timeout = prep_snmp_setting($device, 'timeout');
$retries = prep_snmp_setting($device, 'retries');
if (!isset($device['transport'])) {
$device['transport'] = 'udp';
}
if ($device['snmpver'] == 'v1' || $config['os'][$device['os']]['nobulk']) {
$snmpcommand = $config['snmpwalk'];
} else {
$snmpcommand = $config['snmpbulkwalk'];
$max_repeaters = $device['snmp_max_repeaters'];
if ($max_repeaters > 0) {
$snmpcommand .= " -Cr$max_repeaters ";
}
}
$cmd = $snmpcommand;
$cmd .= snmp_gen_auth($device);
$cmd .= ' -O Qs';
$cmd .= mibdir(null);
$cmd .= ' -m IF-MIB ifIndex';
$cmd .= isset($timeout) ? ' -t '.$timeout : '';
$cmd .= isset($retries) ? ' -r '.$retries : '';
if (!$debug) {
$cmd .= ' 2>/dev/null';
}
$data = trim(external_exec($cmd));
$array = array();
foreach (explode("\n", $data) as $entry) {
list ($this_oid, $this_value) = preg_split('/=/', $entry);
list ($this_oid, $this_index) = explode('.', $this_oid, 2);
$this_index = trim($this_index);
$this_oid = trim($this_oid);
$this_value = trim($this_value);
if (!strstr($this_value, 'at this OID') && $this_index) {
$array[] = $this_value;
}
}
return $array;
}//end snmp_cache_ifIndex()
function snmpwalk_cache_oid($device, $oid, $array, $mib = null, $mibdir = null, $snmpflags = '-OQUs')
{
$data = snmp_walk($device, $oid, $snmpflags, $mib, $mibdir);
foreach (explode("\n", $data) as $entry) {
list($oid,$value) = explode('=', $entry, 2);
$oid = trim($oid);
$value = trim($value);
list($oid, $index) = explode('.', $oid, 2);
if (!strstr($value, 'at this OID') && isset($oid) && isset($index)) {
$array[$index][$oid] = $value;
}
}
return $array;
}//end snmpwalk_cache_oid()
function snmpwalk_cache_long_oid($device, $oid, $noid, $array, $mib = null, $mibdir = null, $snmpflags = '-OQnU')
{
$data = snmp_walk($device, $oid, $snmpflags, $mib, $mibdir);
foreach (explode("\n", $data) as $entry) {
list($tmp_oid,$value) = explode('=', $entry, 2);
$tmp_oid = trim($tmp_oid);
$value = trim($value);
$tmp_index = str_replace($noid, '', $tmp_oid);
$index = md5($tmp_index);
if (!empty($index) && !empty($oid)) {
$array[$index][$oid] = $value;
if (empty($array[$index]['orig'])) {
$array[$index]['orig'] = $tmp_index;
}
}
}
return $array;
}//end snmpwalk_cache_oid()
// just like snmpwalk_cache_oid except that it returns the numerical oid as the index
// this is useful when the oid is indexed by the mac address and snmpwalk would
// return periods (.) for non-printable numbers, thus making many different indexes appear
// to be the same.
function snmpwalk_cache_oid_num($device, $oid, $array, $mib = null, $mibdir = null)
{
return snmpwalk_cache_oid($device, $oid, $array, $mib, $mibdir, $snmpflags = '-OQUn');
}//end snmpwalk_cache_oid_num()
function snmpwalk_cache_multi_oid($device, $oid, $array, $mib = null, $mibdir = null, $snmpflags = '-OQUs')
{
global $cache;
if (!(is_array($cache['snmp'][$device['device_id']]) && array_key_exists($oid, $cache['snmp'][$device['device_id']]))) {
$data = snmp_walk($device, $oid, $snmpflags, $mib, $mibdir);
foreach (explode("\n", $data) as $entry) {
list($r_oid,$value) = explode('=', $entry, 2);
$r_oid = trim($r_oid);
$value = trim($value);
$oid_parts = explode('.', $r_oid);
$r_oid = array_shift($oid_parts);
$index = array_shift($oid_parts);
foreach ($oid_parts as $tmp_oid) {
$index .= '.'.$tmp_oid;
}
if (!strstr($value, 'at this OID') && isset($r_oid) && isset($index)) {
$array[$index][$r_oid] = $value;
}
}//end foreach
$cache['snmp'][$device['device_id']][$oid] = $array;
}//end if
return $cache['snmp'][$device['device_id']][$oid];
}//end snmpwalk_cache_multi_oid()
function snmpwalk_cache_double_oid($device, $oid, $array, $mib = null, $mibdir = null)
{
$data = snmp_walk($device, $oid, '-OQUs', $mib, $mibdir);
foreach (explode("\n", $data) as $entry) {
list($oid,$value) = explode('=', $entry, 2);
$oid = trim($oid);
$value = trim($value);
list($oid, $first, $second) = explode('.', $oid);
if (!strstr($value, 'at this OID') && isset($oid) && isset($first) && isset($second)) {
$double = $first.'.'.$second;
$array[$double][$oid] = $value;
}
}
return $array;
}//end snmpwalk_cache_double_oid()
function snmpwalk_cache_triple_oid($device, $oid, $array, $mib = null, $mibdir = null)
{
$data = snmp_walk($device, $oid, '-OQUs', $mib, $mibdir);
foreach (explode("\n", $data) as $entry) {
list($oid,$value) = explode('=', $entry, 2);
$oid = trim($oid);
$value = trim($value);
list($oid, $first, $second, $third) = explode('.', $oid);
if (!strstr($value, 'at this OID') && isset($oid) && isset($first) && isset($second)) {
$index = $first.'.'.$second.'.'.$third;
$array[$index][$oid] = $value;
}
}
return $array;
}//end snmpwalk_cache_triple_oid()
function snmpwalk_cache_twopart_oid($device, $oid, $array, $mib = 0)
{
global $config, $debug;
$timeout = prep_snmp_setting($device, 'timeout');
$retries = prep_snmp_setting($device, 'retries');
if (!isset($device['transport'])) {
$device['transport'] = 'udp';
}
if ($device['snmpver'] == 'v1' || $config['os'][$device['os']]['nobulk']) {
$snmpcommand = $config['snmpwalk'];
} else {
$snmpcommand = $config['snmpbulkwalk'];
$max_repeaters = $device['snmp_max_repeaters'];
if ($max_repeaters > 0) {
$snmpcommand .= " -Cr$max_repeaters ";
}
}
$cmd = $snmpcommand;
$cmd .= snmp_gen_auth($device);
$cmd .= ' -O QUs';
$cmd .= mibdir(null);
if ($mib) {
$cmd .= " -m $mib";
}
$cmd .= isset($timeout) ? ' -t '.$timeout : '';
$cmd .= isset($retries) ? ' -r '.$retries : '';
$cmd .= ' '.$device['transport'].':'.$device['hostname'].':'.$device['port'].' '.$oid;
if (!$debug) {
$cmd .= ' 2>/dev/null';
}
$data = trim(external_exec($cmd));
foreach (explode("\n", $data) as $entry) {
list($oid,$value) = explode('=', $entry, 2);
$oid = trim($oid);
$value = trim($value);
$value = str_replace('"', '', $value);
list($oid, $first, $second) = explode('.', $oid);
if (!strstr($value, 'at this OID') && isset($oid) && isset($first) && isset($second)) {
$array[$first][$second][$oid] = $value;
}
}
return $array;
}//end snmpwalk_cache_twopart_oid()
function snmpwalk_cache_threepart_oid($device, $oid, $array, $mib = 0)
{
global $config, $debug;
$timeout = prep_snmp_setting($device, 'timeout');
$retries = prep_snmp_setting($device, 'retries');
if (!isset($device['transport'])) {
$device['transport'] = 'udp';
}
if ($device['snmpver'] == 'v1' || $config['os'][$device['os']]['nobulk']) {
$snmpcommand = $config['snmpwalk'];
} else {
$snmpcommand = $config['snmpbulkwalk'];
$max_repeaters = $device['snmp_max_repeaters'];
if ($max_repeaters > 0) {
$snmpcommand .= " -Cr$max_repeaters ";
}
}
$cmd = $snmpcommand;
$cmd .= snmp_gen_auth($device);
$cmd .= ' -O QUs';
$cmd .= mibdir(null);
if ($mib) {
$cmd .= " -m $mib";
}
$cmd .= isset($timeout) ? ' -t '.$timeout : '';
$cmd .= isset($retries) ? ' -r '.$retries : '';
$cmd .= ' '.$device['transport'].':'.$device['hostname'].':'.$device['port'].' '.$oid;
if (!$debug) {
$cmd .= ' 2>/dev/null';
}
$data = trim(external_exec($cmd));
foreach (explode("\n", $data) as $entry) {
list($oid,$value) = explode('=', $entry, 2);
$oid = trim($oid);
$value = trim($value);
$value = str_replace('"', '', $value);
list($oid, $first, $second, $third) = explode('.', $oid);
if ($debug) {
echo "$entry || $oid || $first || $second || $third\n";
}
if (!strstr($value, 'at this OID') && isset($oid) && isset($first) && isset($second) && isset($third)) {
$array[$first][$second][$third][$oid] = $value;
}
}
return $array;
}//end snmpwalk_cache_threepart_oid()
function snmp_cache_slotport_oid($oid, $device, $array, $mib = 0)
{
global $config, $debug;
$timeout = prep_snmp_setting($device, 'timeout');
$retries = prep_snmp_setting($device, 'retries');
if (!isset($device['transport'])) {
$device['transport'] = 'udp';
}
if ($device['snmpver'] == 'v1' || $config['os'][$device['os']]['nobulk']) {
$snmpcommand = $config['snmpwalk'];
} else {
$snmpcommand = $config['snmpbulkwalk'];
$max_repeaters = $device['snmp_max_repeaters'];
if ($max_repeaters > 0) {
$snmpcommand .= " -Cr$max_repeaters ";
}
}
$cmd = $snmpcommand;
$cmd .= snmp_gen_auth($device);
$cmd .= ' -O QUs';
if ($mib) {
$cmd .= " -m $mib";
}
$cmd .= mibdir(null);
$cmd .= isset($timeout) ? ' -t '.$timeout : '';
$cmd .= isset($retries) ? ' -r '.$retries : '';
$cmd .= ' '.$device['transport'].':'.$device['hostname'].':'.$device['port'].' '.$oid;
if (!$debug) {
$cmd .= ' 2>/dev/null';
}
$data = trim(external_exec($cmd));
foreach (explode("\n", $data) as $entry) {
$entry = str_replace($oid.'.', '', $entry);
list($slotport, $value) = explode('=', $entry, 2);
$slotport = trim($slotport);
$value = trim($value);
if ($array[$slotport]['ifIndex']) {
$ifIndex = $array[$slotport]['ifIndex'];
$array[$ifIndex][$oid] = $value;
}
}
return $array;
}//end snmp_cache_slotport_oid()
function snmp_cache_oid($oid, $device, $array, $mib = 0)
{
$array = snmpwalk_cache_oid($device, $oid, $array, $mib);
return $array;
}//end snmp_cache_oid()
function snmp_cache_port_oids($oids, $port, $device, $array, $mib = 0)
{
global $config, $debug;
$timeout = prep_snmp_setting($device, 'timeout');
$retries = prep_snmp_setting($device, 'retries');
if (!isset($device['transport'])) {
$device['transport'] = 'udp';
}
foreach ($oids as $oid) {
$string .= " $oid.$port";
}
$cmd = $config['snmpget'];
$cmd .= snmp_gen_auth($device);
$cmd .= ' -O vq';
$cmd .= isset($timeout) ? ' -t '.$timeout : '';
$cmd .= isset($retries) ? ' -r '.$retries : '';
$cmd .= mibdir(null);
if ($mib) {
$cmd .= " -m $mib";
}
$cmd .= ' -t '.$timeout.' -r '.$retries;
$cmd .= ' '.$device['transport'].':'.$device['hostname'].':'.$device['port'].' '.$string;
if (!$debug) {
$cmd .= ' 2>/dev/null';
}
$data = trim(external_exec($cmd));
$x = 0;
$values = explode("\n", $data);
// echo("Caching: ifIndex $port\n");
foreach ($oids as $oid) {
if (!strstr($values[$x], 'at this OID')) {
$array[$port][$oid] = $values[$x];
}
$x++;
}
return $array;
}//end snmp_cache_port_oids()
function snmp_cache_portIfIndex($device, $array)
{
global $config;
$timeout = prep_snmp_setting($device, 'timeout');
$retries = prep_snmp_setting($device, 'retries');
if (!isset($device['transport'])) {
$device['transport'] = 'udp';
}
$cmd = $config['snmpwalk'];
$cmd .= snmp_gen_auth($device);
$cmd .= ' -CI -m CISCO-STACK-MIB -O q';
$cmd .= mibdir(null);
$cmd .= isset($timeout) ? ' -t '.$timeout : '';
$cmd .= isset($retries) ? ' -r '.$retries : '';
$cmd .= ' '.$device['transport'].':'.$device['hostname'].':'.$device['port'].' portIfIndex';
$output = trim(external_exec($cmd));
foreach (explode("\n", $output) as $entry) {
$entry = str_replace('CISCO-STACK-MIB::portIfIndex.', '', $entry);
list($slotport, $ifIndex) = explode(' ', $entry, 2);
if ($slotport && $ifIndex) {
$array[$ifIndex]['portIfIndex'] = $slotport;
$array[$slotport]['ifIndex'] = $ifIndex;
}
}
return $array;
}//end snmp_cache_portIfIndex()
function snmp_cache_portName($device, $array)
{
global $config;
$timeout = prep_snmp_setting($device, 'timeout');
$retries = prep_snmp_setting($device, 'retries');
if (!isset($device['transport'])) {
$device['transport'] = 'udp';
}
$cmd = $config['snmpwalk'];
$cmd .= snmp_gen_auth($device);
$cmd .= ' -CI -m CISCO-STACK-MIB -O Qs';
$cmd .= mibdir(null);
$cmd .= isset($timeout) ? ' -t '.$timeout : '';
$cmd .= isset($retries) ? ' -r '.$retries : '';
$cmd .= ' '.$device['transport'].':'.$device['hostname'].':'.$device['port'].' portName';
$output = trim(external_exec($cmd));
// echo("Caching: portName\n");
foreach (explode("\n", $output) as $entry) {
$entry = str_replace('portName.', '', $entry);
list($slotport, $portName) = explode('=', $entry, 2);
$slotport = trim($slotport);
$portName = trim($portName);
if ($array[$slotport]['ifIndex']) {
$ifIndex = $array[$slotport]['ifIndex'];
$array[$slotport]['portName'] = $portName;
$array[$ifIndex]['portName'] = $portName;
}
}
return $array;
}//end snmp_cache_portName()
function snmp_gen_auth(&$device)
{
global $debug, $vdebug;
$cmd = '';
if ($device['snmpver'] === 'v3') {
$cmd = " -v3 -n '' -l '".$device['authlevel']."'";
//add context if exist context
if (key_exists('context_name', $device)) {
$cmd = " -v3 -n '".$device['context_name']."' -l '".$device['authlevel']."'";
}
if ($device['authlevel'] === 'noAuthNoPriv') {
// We have to provide a username anyway (see Net-SNMP doc)
// FIXME: There are two other places this is set - why are they ignored here?
$cmd .= ' -u root';
} elseif ($device['authlevel'] === 'authNoPriv') {
$cmd .= " -a '".$device['authalgo']."'";
$cmd .= " -A '".$device['authpass']."'";
$cmd .= " -u '".$device['authname']."'";
} elseif ($device['authlevel'] === 'authPriv') {
$cmd .= " -a '".$device['authalgo']."'";
$cmd .= " -A '".$device['authpass']."'";
$cmd .= " -u '".$device['authname']."'";
$cmd .= " -x '".$device['cryptoalgo']."'";
$cmd .= " -X '".$device['cryptopass']."'";
} else {
if ($debug) {
print 'DEBUG: '.$device['snmpver']." : Unsupported SNMPv3 AuthLevel (wtf have you done ?)\n";
}
}
} elseif ($device['snmpver'] === 'v2c' or $device['snmpver'] === 'v1') {
$cmd = " -".$device['snmpver'];
$cmd .= " -c '".$device['community']."'";
} else {
if ($debug) {
print 'DEBUG: '.$device['snmpver']." : Unsupported SNMP Version (shouldn't be possible to get here)\n";
}
}//end if
if ($vdebug) {
print "DEBUG: SNMP Auth options = $cmd\n";
}
return $cmd;
}//end snmp_gen_auth()
/*
* Translate the given MIB into a PHP array. Each keyword becomes an array index.
*
* Example:
* snmptranslate -Td -On -M mibs -m RUCKUS-ZD-SYSTEM-MIB RUCKUS-ZD-SYSTEM-MIB::ruckusZDSystemStatsNumSta
* .1.3.6.1.4.1.25053.1.2.1.1.1.15.30
* ruckusZDSystemStatsAllNumSta OBJECT-TYPE
* -- FROM RUCKUS-ZD-SYSTEM-MIB
* SYNTAX Unsigned32
* MAX-ACCESS read-only
* STATUS current
* DESCRIPTION "Number of All client devices"
* ::= { iso(1) org(3) dod(6) internet(1) private(4) enterprises(1) ruckusRootMIB(25053) ruckusObjects(1) ruckusZD(2) ruckusZDSystemModule(1) ruckusZDSystemMIB(1) ruckusZDSystemObjects(1)
* ruckusZDSystemStats(15) 30 }
*/
function snmp_mib_parse($oid, $mib, $module, $mibdir = null)
{
$fulloid = explode('.', $oid);
$lastpart = end($fulloid);
$cmd = 'snmptranslate -Td -On';
$cmd .= mibdir($mibdir);
$cmd .= ' -m '.$module.' '.$module.'::';
$cmd .= $lastpart;
$result = array();
$lines = preg_split('/\n+/', trim(shell_exec($cmd)));
foreach ($lines as $l) {
$f = preg_split('/\s+/', trim($l));
// first line is all numeric
if (preg_match('/^[\d.]+$/', $f[0])) {
$result['oid'] = $f[0];
continue;
}
// then the name of the object type
if ($f[1] && $f[1] == 'OBJECT-TYPE') {
$result['object_type'] = $f[0];
continue;
}
// then the other data elements
if ($f[0] == '--' && $f[1] == 'FROM') {
$result['module'] = $f[2];
continue;
}
if ($f[0] == 'MAX-ACCESS') {
$result['max_access'] = $f[1];
continue;
}
if ($f[0] == 'STATUS') {
$result[strtolower($f[0])] = $f[1];
continue;
}
if ($f[0] == 'SYNTAX') {
$result[strtolower($f[0])] = $f[1];
continue;
}
if ($f[0] == 'DESCRIPTION') {
$desc = explode('"', $l);
if ($desc[1]) {
$str = preg_replace('/^[\s.]*/', '', $desc[1]);
$str = preg_replace('/[\s.]*$/', '', $str);
$result[strtolower($f[0])] = $str;
}
continue;
}
}//end foreach
// The main mib entry doesn't have any useful data in it - only return items that have the syntax specified.
if (isset($result['syntax']) && isset($result['object_type'])) {
$result['mib'] = $mib;
return $result;
} else {
return null;
}
} // snmp_mib_parse
/*
* Walks through the given MIB module, looking for the given MIB.
* NOTE: different from snmp walk - this doesn't touch the device.
* NOTE: There's probably a better way to do this with snmptranslate.
*
* Example:
* snmptranslate -Ts -M mibs -m RUCKUS-ZD-SYSTEM-MIB | grep ruckusZDSystemStats
* .iso.org.dod.internet.private.enterprises.ruckusRootMIB.ruckusObjects.ruckusZD.ruckusZDSystemModule.ruckusZDSystemMIB.ruckusZDSystemObjects.ruckusZDSystemStats
* .iso.org.dod.internet.private.enterprises.ruckusRootMIB.ruckusObjects.ruckusZD.ruckusZDSystemModule.ruckusZDSystemMIB.ruckusZDSystemObjects.ruckusZDSystemStats.ruckusZDSystemStatsNumAP
* .iso.org.dod.internet.private.enterprises.ruckusRootMIB.ruckusObjects.ruckusZD.ruckusZDSystemModule.ruckusZDSystemMIB.ruckusZDSystemObjects.ruckusZDSystemStats.ruckusZDSystemStatsNumSta
* ...
*/
function snmp_mib_walk($mib, $module, $mibdir = null)
{
$cmd = 'snmptranslate -Ts';
$cmd .= mibdir($mibdir);
$cmd .= ' -m '.$module;
$result = array();
$data = preg_split('/\n+/', shell_exec($cmd));
foreach ($data as $oid) {
// only include oids which are part of this mib
if (strstr($oid, $mib)) {
$obj = snmp_mib_parse($oid, $mib, $module, $mibdir);
if ($obj) {
$result[] = $obj;
}
}
}
return $result;
} // snmp_mib_walk
function quote_column($a)
{
return '`'.$a.'`';
} // quote_column
function join_array($a, $b)
{
return quote_column($a).'='.$b;
} // join_array
/*
* Update the given table in the database with the given row & column data.
* @param tablename The table to update
* @param columns An array of column names
* @param numkeys The number of columns which are in the primary key of the table; these primary keys must be first in the list of columns
* @param rows Row data to insert, an array of arrays with column names as the second-level keys
*/
function update_db_table($tablename, $columns, $numkeys, $rows)
{
dbBeginTransaction();
foreach ($rows as $nothing => $obj) {
// create a parameter list based on the columns
$params = array();
foreach ($columns as $column) {
$params[] = $obj[$column];
}
$column_placeholders = array_fill(0, count($columns), '?');
// build the "ON DUPLICATE KEY" part
$non_key_columns = array_slice($columns, $numkeys);
$non_key_placeholders = array_slice($column_placeholders, $numkeys);
$update_definitions = array_map("join_array", $non_key_columns, $non_key_placeholders);
$non_key_params = array_slice($params, $numkeys);
$sql = 'INSERT INTO `' . $tablename . '` (' .
implode(',', array_map("quote_column", $columns)) .
') VALUES (' . implode(',', $column_placeholders) .
') ON DUPLICATE KEY UPDATE ' . implode(',', $update_definitions);
$result = dbQuery($sql, array_merge($params, $non_key_params));
d_echo("Result: $result\n");
}
dbCommitTransaction();
} // update_db_table
/*
* Load the given MIB into the database.
* @return count of objects loaded
*/
function snmp_mib_load($mib, $module, $included_by, $mibdir = null)
{
$mibs = array();
foreach (snmp_mib_walk($mib, $module, $mibdir) as $obj) {
$mibs[$obj['object_type']] = $obj;
$mibs[$obj['object_type']]['included_by'] = $included_by;
}
d_echo($mibs);
// NOTE: `last_modified` omitted due to being automatically maintained by MySQL
$columns = array('module', 'mib', 'object_type', 'oid', 'syntax', 'description', 'max_access', 'status', 'included_by');
update_db_table('mibdefs', $columns, 3, $mibs);
return count($mibs);
} // snmp_mib_load
/*
* Turn the given oid (name or numeric value) into a MODULE::mib name.
* @return an array consisting of the module and mib names, or null if no matching MIB is found.
* Example:
* snmptranslate -m all -M mibs .1.3.6.1.4.1.8072.3.2.10 2>/dev/null
* NET-SNMP-TC::linux
*/
function snmp_translate($oid, $module, $mibdir = null)
{
if ($module !== 'all') {
$oid = "$module::$oid";
}
$cmd = 'snmptranslate'.mibdir($mibdir);
$cmd .= " -IR -m $module $oid";
// load all the MIBs looking for our object
$cmd .= ' 2>/dev/null';
// ignore invalid MIBs
$lines = preg_split('/\n+/', external_exec($cmd));
if (empty($lines)) {
d_echo("No results from snmptranslate\n");
return null;
}
$matches = array();
if (!preg_match('/(.*)::(.*)/', $lines[0], $matches)) {
d_echo("This doesn't look like a MIB: $lines[0]\n");
return null;
}
d_echo("SNMP translated: $module::$oid -> $matches[1]::$matches[2]\n");
return array(
$matches[1],
$matches[2],
);
} // snmp_translate
/*
* check if the type of the oid is a numeric type, and if so,
* @return the name of RRD type that is best suited to saving it
*/
function oid_rrd_type($oid, $mibdef)
{
if (!isset($mibdef[$oid])) {
return false;
}
switch ($mibdef[$oid]['syntax']) {
case 'OCTET':
case 'IpAddress':
return false;
case 'TimeTicks':
// FIXME
return false;
case 'INTEGER':
case 'Integer32':
return 'GAUGE:600:U:U';
case 'Counter32':
case 'Counter64':
return 'COUNTER:600:0:U';
case 'Gauge32':
case 'Unsigned32':
return 'GAUGE:600:0:U';
}
return false;
} // oid_rrd_type
/*
* Construct a graph names for use in the database.
* Tag each as in use on this device in &$graphs.
* Update the database with graph definitions as needed.
* We don't include the index in the graph name - that is handled at display time.
*/
function tag_graphs($mibname, $oids, $mibdef, &$graphs)
{
foreach ($oids as $index => $array) {
foreach ($array as $oid => $val) {
$graphname = $mibname.'-'.$mibdef[$oid]['shortname'];
$graphs[$graphname] = true;
}
}
} // tag_graphs
/*
* Ensure a graph_type definition exists in the database for the entities in this MIB
*/
function update_mib_graph_types($mibname, $oids, $mibdef, $graphs)
{
$seengraphs = array();
// Get the list of graphs currently in the database
// FIXME: there's probably a more efficient way to do this
foreach (dbFetch('SELECT DISTINCT `graph_subtype` FROM `graph_types` WHERE `graph_subtype` LIKE ?', array("$mibname-%")) as $graph) {
$seengraphs[$graph['graph_subtype']] = true;
}
foreach ($oids as $index => $array) {
$i = 1;
foreach ($array as $oid => $val) {
$graphname = "$mibname-".$mibdef[$oid]['shortname'];
// add the graph if it's not in the database already
if ($graphs[$graphname] && !$seengraphs[$graphname]) {
// construct a graph definition based on the MIB definition
$graphdef = array();
$graphdef['graph_type'] = 'device';
$graphdef['graph_subtype'] = $graphname;
$graphdef['graph_section'] = 'mib';
$graphdef['graph_descr'] = $mibdef[$oid]['description'];
$graphdef['graph_order'] = $i++;
// TODO: add colours, unit_text, and ds
// add graph to the database
dbInsert($graphdef, 'graph_types');
}
}
}
} // update_mib_graph_types
/*
* Save all of the measurable oids for the device in their own RRDs.
* Save the current value of all the oids in the database.
*/
function save_mibs($device, $mibname, $oids, $mibdef, &$graphs)
{
$usedoids = array();
$deviceoids = array();
foreach ($oids as $index => $array) {
foreach ($array as $obj => $val) {
// build up the device_oid row for saving into the database
$numvalue = is_numeric($val) ? $val + 0 : 0;
$deviceoids[] = array(
'device_id' => $device['device_id'],
'oid' => $mibdef[$obj]['oid'].".".$index,
'module' => $mibdef[$obj]['module'],
'mib' => $mibdef[$obj]['mib'],
'object_type' => $obj,
'value' => $val,
'numvalue' => $numvalue,
);
$type = oid_rrd_type($obj, $mibdef);
if ($type === false) {
continue;
}
$usedoids[$index][$obj] = $val;
$tags = array(
'rrd_def' => array("DS:mibval:$type"),
'rrd_name' => array($mibname, $mibdef[$obj]['shortname'], $index),
'rrd_oldname' => array($mibname, $mibdef[$obj]['object_type'], $index),
'index' => $index,
'oid' => $mibdef[$obj]['oid'],
'module' => $mibdef[$obj]['module'],
'mib' => $mibdef[$obj]['mib'],
'object_type' => $obj,
);
data_update($device, 'mibval', $tags, $val);
}
}
tag_graphs($mibname, $usedoids, $mibdef, $graphs);
update_mib_graph_types($mibname, $usedoids, $mibdef, $graphs);
// update database
$columns = array('device_id', 'oid', 'module', 'mib', 'object_type', 'value', 'numvalue');
update_db_table('device_oids', $columns, 2, $deviceoids);
} // save_mibs
/*
* @return an array of MIB objects matching $module, $name, keyed by object_type
*/
function load_mibdefs($module, $name)
{
$params = array($module, $name);
$result = array();
$object_types = array();
foreach (dbFetchRows("SELECT * FROM `mibdefs` WHERE `module` = ? AND `mib` = ?", $params) as $row) {
$mib = $row['object_type'];
$object_types[] = $mib;
$result[$mib] = $row;
}
// add shortname to each element
$prefix = longest_matching_prefix($name, $object_types);
foreach ($result as $mib => $m) {
if (strlen($prefix) > 2) {
$result[$mib]['shortname'] = preg_replace("/^$prefix/", '', $m['object_type'], 1);
} else {
$result[$mib]['shortname'] = $m['object_type'];
}
}
d_echo($result);
return $result;
} // load_mibdefs
/*
* @return an array of MIB names and modules for $device from the database
*/
function load_device_mibs($device)
{
$params = array($device['device_id']);
$result = array();
foreach (dbFetchRows("SELECT `mib`, `module` FROM device_mibs WHERE device_id = ?", $params) as $row) {
$result[$row['mib']] = $row['module'];
}
return $result;
} // load_device_mibs
/*
* Run MIB-based polling for $device. Update $graphs with the results.
*/
function poll_mibs($device, &$graphs)
{
if (!is_mib_poller_enabled($device)) {
return;
}
echo 'MIB: polling ';
d_echo("\n");
foreach (load_device_mibs($device) as $name => $module) {
echo "$name ";
d_echo("\n");
$oids = snmpwalk_cache_oid($device, $name, array(), $module, null, "-OQUsb");
d_echo($oids);
save_mibs($device, $name, $oids, load_mibdefs($module, $name), $graphs);
}
echo "\n";
} // poll_mibs
/*
* Take a list of MIB name => module pairs.
* Validate MIBs and store the device->mib mapping in the database.
* See includes/discovery/os/ruckuswireless.inc.php for an example of usage.
*/
function register_mibs($device, $mibs, $included_by)
{
if (!is_mib_poller_enabled($device)) {
return;
}
d_echo("MIB: registering\n");
foreach ($mibs as $name => $module) {
$translated = snmp_translate($name, $module);
if ($translated) {
$mod = $translated[0];
$nam = $translated[1];
d_echo(" $mod::$nam\n");
if (snmp_mib_load($nam, $mod, $included_by) > 0) {
// NOTE: `last_modified` omitted due to being automatically maintained by MySQL
$columns = array('device_id', 'module', 'mib', 'included_by');
$rows = array();
$rows[] = array(
'device_id' => $device['device_id'],
'module' => $mod,
'mib' => $nam,
'included_by' => $included_by,
);
update_db_table('device_mibs', $columns, 3, $rows);
} else {
d_echo("MIB: Could not load definition for $mod::$nam\n");
}
} else {
d_echo("MIB: Could not find $module::$name\n");
}
}
echo "\n";
} // register_mibs
/**
* SNMPWalk_array_num - performs a numeric SNMPWalk and returns an array containing $count indexes
* One Index:
* From: 1.3.6.1.4.1.9.9.166.1.15.1.1.27.18.655360 = 0
* To: $array['1.3.6.1.4.1.9.9.166.1.15.1.1.27.18']['655360'] = 0
* Two Indexes:
* From: 1.3.6.1.4.1.9.9.166.1.15.1.1.27.18.655360 = 0
* To: $array['1.3.6.1.4.1.9.9.166.1.15.1.1.27']['18']['655360'] = 0
* And so on...
* Think snmpwalk_cache_*_oid but for numeric data.
*
* Why is this useful?
* Some SNMP data contains a single index (eg. ifIndex in IF-MIB) and some is dual indexed
* (eg. PolicyIndex/ObjectsIndex in CISCO-CLASS-BASED-QOS-MIB).
* The resulting array allows us to easily access the top level index we want and iterate over the data from there.
*
* @param $device
* @param $OID
* @param int $indexes
* @internal param $string
* @return array
*/
function snmpwalk_array_num($device, $oid, $indexes = 1)
{
$array = array();
$string = snmp_walk($device, $oid, '-Osqn');
if ($string === false) {
// False means: No Such Object.
return false;
}
if ($string == "") {
// Empty means SNMP timeout or some such.
return null;
}
// Let's turn the string into something we can work with.
foreach (explode("\n", $string) as $line) {
if ($line[0] == '.') {
// strip the leading . if it exists.
$line = substr($line, 1);
}
list($key, $value) = explode(' ', $line, 2);
$prop_id = explode('.', $key);
$value = trim($value);
// if we have requested more levels that exist, set to the max.
if ($indexes > count($prop_id)) {
$indexes = count($prop_id)-1;
}
for ($i=0; $i<$indexes; $i++) {
// Pop the index off.
$index = array_pop($prop_id);
$value = array($index => $value);
}
// Rebuild our key
$key = implode('.', $prop_id);
// Add the entry to the master array
$array = array_replace_recursive($array, array($key => $value));
}
return $array;
}