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cacti/lib/snmp.php
T
cigamit ac97bed4af adding snmp class and session support 
Courtesy of Boris Lytochkin and Yandex LLC
2016-08-17 19:37:19 -05:00

765 lines
23 KiB
PHP
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<?php
/*
+-------------------------------------------------------------------------+
| Copyright (C) 2004-2011 The Cacti Group |
| Portions Copyright (C) 2010 Boris Lytochkin, Sponsored by Yandex LLC |
| |
| 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 2 |
| of the License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
+-------------------------------------------------------------------------+
| Cacti: The Complete RRDTool-based Graphing Solution |
+-------------------------------------------------------------------------+
| This code is designed, written, and maintained by the Cacti Group. See |
| about.php and/or the AUTHORS file for specific developer information. |
+-------------------------------------------------------------------------+
| http://www.cacti.net/ |
+-------------------------------------------------------------------------+
*/
define('REGEXP_SNMP_TRIM', '/(hex|counter(32|64)|gauge|gauge(32|64)|float|ipaddress|string|integer):/i');
define('SNMP_METHOD_PHP', 1);
define('SNMP_METHOD_BINARY', 2);
global $banned_snmp_strings;
$banned_snmp_strings = array('End of MIB', 'No Such', 'No more');
if (!class_exists('SNMP')) {
include_once($config['include_path'] . '/phpsnmp/classSNMP.php');
}
function cacti_snmp_session($hostname, $community, $version, $username, $password, $auth_proto, $priv_pass, $priv_proto, $context, $contextEngineID, $port = 161, $timeout = 500, $retries = 0, $max_oids = 10) {
switch ($version) {
case '1':
$version = SNMP::VERSION_1;
break;
case '2':
$version = SNMP::VERSION_2c;
break;
case '3':
$version = SNMP::VERSION_3;
break;
}
try {
$session = new SNMP($version, $hostname . ':' . $port, ($version == 3 ? $username : $community), $timeout * 1000, $retries);
} catch (Exception $e) {
return FALSE;
}
$session->oid_output_format = SNMP_OID_OUTPUT_NUMERIC;
$session->valueretrieval = SNMP_VALUE_LIBRARY;
$session->max_oids = $max_oids;
if ($version != SNMP::VERSION_3) {
return $session;
}
if ($priv_proto == '[None]') {
$proto = 'authNoPriv';
$priv_proto = '';
}else{
$proto = 'authPriv';
}
$session->set_security($proto, $auth_proto, $password, $priv_proto, $priv_pass, $context, $contextEngineID);
return $session;
}
function cacti_snmp_get($hostname, $community, $oid, $version, $username, $password,
$auth_proto, $priv_pass, $priv_proto, $context, $port = 161, $timeout = 500, $retries = 0, $environ = SNMP_POLLER) {
global $config;
/* determine default retries */
if (($retries == 0) || (!is_numeric($retries))) {
$retries = read_config_option('snmp_retries');
if ($retries == '') $retries = 3;
}
/* do not attempt to poll invalid combinations */
if (($version == 0) || (!is_numeric($version)) ||
(!is_numeric($port)) ||
(!is_numeric($retries)) ||
(!is_numeric($timeout)) ||
(($community == '') && ($version != 3))
) {
return 'U';
}
if ((snmp_get_method($version) == SNMP_METHOD_PHP) &&
(!strlen($context) || ($version != 3))) {
/* make sure snmp* is verbose so we can see what types of data
we are getting back */
snmp_set_quick_print(0);
if ($version == '1') {
$snmp_value = @snmpget($hostname . ':' . $port, $community, $oid, ($timeout * 1000), $retries);
}elseif ($version == '2') {
$snmp_value = @snmp2_get($hostname . ':' . $port, $community, $oid, ($timeout * 1000), $retries);
}else{
if ($priv_proto == '[None]' || $priv_pass == '') {
$proto = 'authNoPriv';
$priv_proto = '';
}else{
$proto = 'authPriv';
}
$snmp_value = @snmp3_get($hostname . ':' . $port, $username, $proto, $auth_proto, $password, $priv_proto, $priv_pass, $oid, ($timeout * 1000), $retries);
}
if ($snmp_value === false) {
cacti_log("WARNING: SNMP Get Timeout for Host:'$hostname', and OID:'$oid'", false);
}
}else {
$snmp_value = '';
/* ucd/net snmp want the timeout in seconds */
$timeout = ceil($timeout / 1000);
if ($version == '1') {
$snmp_auth = '-c ' . snmp_escape_string($community); /* v1/v2 - community string */
}elseif ($version == '2') {
$snmp_auth = '-c ' . snmp_escape_string($community); /* v1/v2 - community string */
$version = '2c'; /* ucd/net snmp prefers this over '2' */
}elseif ($version == '3') {
if ($priv_proto == '[None]' || $priv_pass == '') {
$proto = 'authNoPriv';
$priv_proto = '';
}else{
$proto = 'authPriv';
}
if (strlen($priv_pass)) {
$priv_pass = '-X ' . snmp_escape_string($priv_pass) . ' -x ' . snmp_escape_string($priv_proto);
}else{
$priv_pass = '';
}
if (strlen($context)) {
$context = '-n ' . snmp_escape_string($context);
}else{
$context = '';
}
$snmp_auth = trim('-u ' . snmp_escape_string($username) .
' -l ' . snmp_escape_string($proto) .
' -a ' . snmp_escape_string($auth_proto) .
' -A ' . snmp_escape_string($password) .
' ' . $priv_pass .
' ' . $context); /* v3 - username/password */
}
/* no valid snmp version has been set, get out */
if (empty($snmp_auth)) { return; }
exec(cacti_escapeshellcmd(read_config_option('path_snmpget')) .
' -O fntev ' . $snmp_auth .
' -v ' . $version .
' -t ' . $timeout .
' -r ' . $retries .
' ' . cacti_escapeshellarg($hostname) . ':' . $port .
' ' . cacti_escapeshellarg($oid), $snmp_value);
/* fix for multi-line snmp output */
if (is_array($snmp_value)) {
$snmp_value = implode(' ', $snmp_value);
}
}
/* fix for multi-line snmp output */
if (isset($snmp_value)) {
if (is_array($snmp_value)) {
$snmp_value = implode(' ', $snmp_value);
}
}
if (substr_count($snmp_value, 'Timeout:')) {
cacti_log("WARNING: SNMP Get Timeout for Host:'$hostname', and OID:'$oid'", false);
}
/* strip out non-snmp data */
$snmp_value = format_snmp_string($snmp_value, false);
return $snmp_value;
}
function cacti_snmp_getnext($hostname, $community, $oid, $version, $username, $password,
$auth_proto, $priv_pass, $priv_proto, $context, $port = 161, $timeout = 500, $retries = 0, $environ = SNMP_POLLER) {
global $config;
/* determine default retries */
if (($retries == 0) || (!is_numeric($retries))) {
$retries = read_config_option('snmp_retries');
if ($retries == '') $retries = 3;
}
/* do not attempt to poll invalid combinations */
if (($version == 0) || (!is_numeric($version)) || (!is_numeric($port)) || (!is_numeric($retries)) ||
(!is_numeric($timeout)) || (($community == '') && ($version != 3))) {
return 'U';
}
if ((snmp_get_method($version) == SNMP_METHOD_PHP) &&
(!strlen($context) || ($version != 3))) {
/* make sure snmp* is verbose so we can see what types of data
we are getting back */
snmp_set_quick_print(0);
if ($version == '1') {
$snmp_value = @snmpgetnext($hostname . ':' . $port, $community, $oid, ($timeout * 1000), $retries);
}elseif ($version == '2') {
$snmp_value = @snmp2_getnext($hostname . ':' . $port, $community, $oid, ($timeout * 1000), $retries);
}else{
if ($priv_proto == '[None]' || $priv_pass == '') {
$proto = 'authNoPriv';
$priv_proto = '';
}else{
$proto = 'authPriv';
}
$snmp_value = @snmp3_getnext($hostname . ':' . $port, $username, $proto, $auth_proto, $password, $priv_proto, $priv_pass, $oid, ($timeout * 1000), $retries);
}
if ($snmp_value === false) {
cacti_log("WARNING: SNMP GetNext Timeout for Host:'$hostname', and OID:'$oid'", false);
}
} else {
$snmp_value = '';
/* ucd/net snmp want the timeout in seconds */
$timeout = ceil($timeout / 1000);
if ($version == '1') {
$snmp_auth = '-c ' . snmp_escape_string($community); /* v1/v2 - community string */
}elseif ($version == '2') {
$snmp_auth = '-c ' . snmp_escape_string($community); /* v1/v2 - community string */
$version = '2c'; /* ucd/net snmp prefers this over '2' */
}elseif ($version == '3') {
if ($priv_proto == '[None]' || $priv_pass == '') {
$proto = 'authNoPriv';
$priv_proto = '';
}else{
$proto = 'authPriv';
}
if (strlen($priv_pass)) {
$priv_pass = '-X ' . snmp_escape_string($priv_pass) . ' -x ' . snmp_escape_string($priv_proto);
}else{
$priv_pass = '';
}
if (strlen($context)) {
$context = '-n ' . snmp_escape_string($context);
}else{
$context = '';
}
$snmp_auth = trim('-u ' . snmp_escape_string($username) .
' -l ' . snmp_escape_string($proto) .
' -a ' . snmp_escape_string($auth_proto) .
' -A ' . snmp_escape_string($password) .
' ' . $priv_pass .
' ' . $context); /* v3 - username/password */
}
/* no valid snmp version has been set, get out */
if (empty($snmp_auth)) {
return;
}
exec(cacti_escapeshellcmd(read_config_option('path_snmpgetnext')) .
' -O fntev ' . $snmp_auth .
' -v ' . $version .
' -t ' . $timeout .
' -r ' . $retries .
' ' . cacti_escapeshellarg($hostname) . ':' . $port .
' ' . cacti_escapeshellarg($oid), $snmp_value);
}
if (isset($snmp_value)) {
/* fix for multi-line snmp output */
if (is_array($snmp_value)) {
$snmp_value = implode(' ', $snmp_value);
}
}
if (substr_count($snmp_value, 'Timeout:')) {
cacti_log("WARNING: SNMP GetNext Timeout for Host:'$hostname', and OID:'$oid'", false);
}
/* strip out non-snmp data */
$snmp_value = format_snmp_string($snmp_value, false);
return $snmp_value;
}
function cacti_snmp_session_walk($session, $oid, $dummy = FALSE, $max_repetitions = NULL, $non_repeaters = NULL) {
$info = $session->info;
if (is_array($oid) && sizeof($oid) == 0) {
cacti_log('Empty OID!', false);
return array();
}
if ($non_repeaters === NULL)
$non_repeaters = 0;
if ($max_repetitions === NULL)
$max_repetitions = $session->max_oids;
if ($max_repetitions <= 0)
$max_repetitions = 10;
$out = @$session->walk($oid, FALSE, $max_repetitions, $non_repeaters);
if ($out === FALSE) {
if($oid == '.1.3.6.1.2.1.47.1.1.1.1.2' || $oid == '1.3.6.1.4.1.9.9.68.1.2.2.1.2' ||
$oid == '.1.3.6.1.4.1.9.9.46.1.6.1.1.5' || $oid == '.1.3.6.1.4.1.9.9.46.1.6.1.1.14' ||
$oid == '.1.3.6.1.4.1.9.9.23.1.2.1.1.6') {
/* do nothing */
}else{
if ($session->getErrno() == SNMP::ERRNO_TIMEOUT) {
cacti_log('WARNING: SNMP Walk Timeout (' . ($info['timeout']/1000) . " ms) for Host:'" . $info['hostname'] . "', and OID:'$oid'", false);
}
}
return array();
}
if (sizeof($out)) {
foreach($out as $oid => $value){
$out[$oid] = format_snmp_string($value, FALSE);
}
}
return $out;
}
function cacti_snmp_session_get($session, $oid) {
$info = $session->info;
if (is_array($oid) && sizeof($oid) == 0) {
cacti_log('Empty OID!', false);
return array();
}
$out = @$session->get($oid);
if (is_array($oid)) {
$oid = implode(',', $oid);
}
if ($out === FALSE) {
if ($session->getErrno() == SNMP::ERRNO_TIMEOUT) {
cacti_log('WARNING: SNMP Get Timeout (' . ($info['timeout']/1000) . " ms) for Host:'" . $info['hostname'] . "', and OID:'$oid'", false);
}
return '';
}
if (is_array($out)) {
foreach($out as $oid => $value){
$out[$oid] = format_snmp_string($value, FALSE);
}
} else {
$out = format_snmp_string($out, FALSE);
}
return $out;
}
function cacti_snmp_session_getnext($session, $oid) {
$info = $session->info;
if (is_array($oid) && sizeof($oid) == 0) {
cacti_log('Empty OID!', false);
return array();
}
$out = @$session->getnext($oid);
if (is_array($oid)) {
$oid = implode(',', $oid);
}
if ($out === FALSE) {
if ($session->getErrno() == SNMP::ERRNO_TIMEOUT) {
cacti_log('WARNING: SNMP GetNext Timeout (' . ($info['timeout']/1000) . " ms) for Host:'" . $info['hostname'] . "', and OID:'$oid'", false);
}
return '';
}
if (is_array($out)) {
foreach($out as $oid => $value){
$out[$oid] = format_snmp_string($value, FALSE);
}
} else {
$out = format_snmp_string($out, FALSE);
}
return $out;
}
function cacti_snmp_walk($hostname, $community, $oid, $version, $username, $password, $auth_proto, $priv_pass, $priv_proto, $context, $port = 161, $timeout = 500, $retries = 0, $max_oids = 10, $environ = SNMP_POLLER) {
global $config, $banned_snmp_strings;
$snmp_oid_included = true;
$snmp_auth = '';
$snmp_array = array();
$temp_array = array();
/* determine default retries */
if (($retries == 0) || (!is_numeric($retries))) {
$retries = read_config_option('snmp_retries');
if ($retries == '') $retries = 3;
}
/* determine default max_oids */
if (($max_oids == 0) || (!is_numeric($max_oids))) {
$max_oids = read_config_option('max_get_size');
if ($max_oids == '') $max_oids = 10;
}
/* do not attempt to poll invalid combinations */
if (($version == 0) || (!is_numeric($version)) ||
(!is_numeric($max_oids)) ||
(!is_numeric($port)) ||
(!is_numeric($retries)) ||
(!is_numeric($timeout)) ||
(($community == '') && ($version != 3))
) {
return array();
}
$path_snmpbulkwalk = read_config_option('path_snmpbulkwalk');
if ((snmp_get_method($version) == SNMP_METHOD_PHP) &&
(!strlen($context) || ($version != 3)) &&
(($version == 1) ||
(version_compare(phpversion(), '5.1') >= 0) ||
(!file_exists($path_snmpbulkwalk)))) {
/* make sure snmp* is verbose so we can see what types of data
we are getting back */
/* force php to return numeric oid's */
if (function_exists('snmp_set_oid_numeric_print')) {
snmp_set_oid_numeric_print(TRUE);
}
if (function_exists('snmprealwalk')) {
$snmp_oid_included = false;
}
snmp_set_quick_print(0);
if ($version == '1') {
$temp_array = @snmprealwalk($hostname . ':' . $port, $community, $oid, ($timeout * 1000), $retries);
}elseif ($version == 2) {
$temp_array = @snmp2_real_walk($hostname . ':' . $port, $community, $oid, ($timeout * 1000), $retries);
}else{
if ($priv_proto == '[None]' || $priv_pass == '') {
$proto = 'authNoPriv';
$priv_proto = '';
}else{
$proto = 'authPriv';
}
$temp_array = @snmp3_real_walk($hostname . ':' . $port, $username, $proto, $auth_proto, $password, $priv_proto, $priv_pass, $oid, ($timeout * 1000), $retries);
}
if ($temp_array === false) {
if($oid == '.1.3.6.1.2.1.47.1.1.1.1.2' || $oid == '1.3.6.1.4.1.9.9.68.1.2.2.1.2' ||
$oid == '.1.3.6.1.4.1.9.9.46.1.6.1.1.5' || $oid == '.1.3.6.1.4.1.9.9.46.1.6.1.1.14' ||
$oid == '.1.3.6.1.4.1.9.9.23.1.2.1.1.6') {
/* do nothing */
}else{
cacti_log("WARNING: SNMP Walk Timeout ($timeout ms) for Host:'$hostname', and OID:'$oid'", false);
}
}
/* check for bad entries */
if (is_array($temp_array) && sizeof($temp_array)) {
foreach($temp_array as $key => $value) {
foreach($banned_snmp_strings as $item) {
if(strstr($value, $item) != '') {
unset($temp_array[$key]);
continue 2;
}
}
}
}
$o = 0;
for (@reset($temp_array); $i = @key($temp_array); next($temp_array)) {
if ($temp_array[$i] != 'NULL') {
$snmp_array[$o]['oid'] = preg_replace('/^\./', '', $i);
$snmp_array[$o]['value'] = format_snmp_string($temp_array[$i], $snmp_oid_included);
}
$o++;
}
}else{
/* ucd/net snmp want the timeout in seconds */
$timeout = ceil($timeout / 1000);
if ($version == '1') {
$snmp_auth = '-c ' . snmp_escape_string($community); /* v1/v2 - community string */
}elseif ($version == '2') {
$snmp_auth = '-c ' . snmp_escape_string($community); /* v1/v2 - community string */
$version = '2c'; /* ucd/net snmp prefers this over '2' */
}elseif ($version == '3') {
if ($priv_proto == '[None]' || $priv_pass == '') {
$proto = 'authNoPriv';
$priv_proto = '';
}else{
$proto = 'authPriv';
}
if (strlen($priv_pass)) {
$priv_pass = '-X ' . snmp_escape_string($priv_pass) . ' -x ' . snmp_escape_string($priv_proto);
}else{
$priv_pass = '';
}
if (strlen($context)) {
$context = '-n ' . snmp_escape_string($context);
}else{
$context = '';
}
$snmp_auth = trim('-u ' . snmp_escape_string($username) .
' -l ' . snmp_escape_string($proto) .
' -a ' . snmp_escape_string($auth_proto) .
' -A ' . snmp_escape_string($password) .
' ' . $priv_pass .
' ' . $context); /* v3 - username/password */
}
if (read_config_option('snmp_version') == 'ucd-snmp') {
/* escape the command to be executed and vulnerable parameters
* numeric parameters are not subject to command injection
* snmp_auth is treated seperately, see above */
$temp_array = exec_into_array(cacti_escapeshellcmd(read_config_option('path_snmpwalk')) .
' -v ' . $version .
' -t ' . $timeout .
' -r ' . $retries .
' ' . cacti_escapeshellarg($hostname) . ':' . $port .
' ' . $snmp_auth .
' ' . cacti_escapeshellarg($oid));
}else {
if (file_exists($path_snmpbulkwalk) && ($version > 1) && ($max_oids > 1)) {
$temp_array = exec_into_array(cacti_escapeshellcmd($path_snmpbulkwalk) .
' -O Qn ' . $snmp_auth .
' -v ' . $version .
' -t ' . $timeout .
' -r ' . $retries .
' -Cr' . $max_oids . ' ' .
cacti_escapeshellarg($hostname) . ':' . $port . ' ' .
cacti_escapeshellarg($oid));
}else{
$temp_array = exec_into_array(cacti_escapeshellcmd(read_config_option('path_snmpwalk')) .
' -O Qn ' . $snmp_auth .
' -v ' . $version .
' -t ' . $timeout .
' -r ' . $retries .
' ' . cacti_escapeshellarg($hostname) . ':' . $port .
' ' . cacti_escapeshellarg($oid));
}
}
if (substr_count(implode(' ', $temp_array), 'Timeout:')) {
cacti_log("WARNING: SNMP Walk Timeout for Host:'$hostname', and OID:'$oid'", false);
}
/* check for bad entries */
if (is_array($temp_array) && sizeof($temp_array)) {
foreach($temp_array as $key => $value) {
foreach($banned_snmp_strings as $item) {
if(strstr($value, $item) != '') {
unset($temp_array[$key]);
continue 2;
}
}
}
}
for ($i=0; $i < count($temp_array); $i++) {
if ($temp_array[$i] != 'NULL') {
$snmp_array[$i]['oid'] = trim(preg_replace('/(.*) =.*/', "\\1", $temp_array[$i]));
$snmp_array[$i]['value'] = format_snmp_string($temp_array[$i], true);
}
}
}
return $snmp_array;
}
function format_snmp_string($string, $snmp_oid_included) {
global $banned_snmp_strings;
$string = preg_replace(REGEXP_SNMP_TRIM, '', trim($string));
if (substr($string, 0, 7) == 'No Such') {
return '';
}
if ($snmp_oid_included) {
/* strip off all leading junk (the oid and stuff) */
$string_array = explode('=', $string);
if (sizeof($string_array) == 1) {
/* trim excess first */
$string = trim($string);
}else if ((substr($string, 0, 1) == '.') || (strpos($string, '::') !== false)) {
/* drop the OID from the array */
array_shift($string_array);
$string = trim(implode('=', $string_array));
}else {
$string = trim(implode('=', $string_array));
}
}
/* return the easiest value */
if ($string == '') {
return $string;
}
/* now check for the second most obvious */
if (is_numeric($string)) {
return trim($string);
}
/* remove ALL quotes, and other special delimiters */
$string = str_replace('"', '', $string);
$string = str_replace("'", '', $string);
$string = str_replace('>', '', $string);
$string = str_replace('<', '', $string);
$string = str_replace("\\", '', $string);
$string = str_replace("\n", ' ', $string);
$string = str_replace("\r", ' ', $string);
/* account for invalid MIB files */
if (substr_count($string, 'Wrong Type')) {
$string = strrev($string);
if ($position = strpos($string, ':')) {
$string = trim(strrev(substr($string, 0, $position)));
}else{
$string = trim(strrev($string));
}
}
/* Remove invalid chars */
$k = strlen($string);
for ($i=0; $i < $k; $i++) {
if ((ord($string[$i]) <= 31) || (ord($string[$i]) >= 127)) {
$string[$i] = ' ';
}
}
$string = trim($string);
if ((substr_count($string, 'Hex-STRING:')) ||
(substr_count($string, 'Hex-')) ||
(substr_count($string, 'Hex:'))) {
/* strip of the 'Hex-STRING:' */
$string = preg_replace('/Hex-STRING: ?/i', '', $string);
$string = preg_replace('/Hex: ?/i', '', $string);
$string = preg_replace('/Hex- ?/i', '', $string);
$string_array = explode(' ', $string);
/* loop through each string character and make ascii */
$string = '';
$hexval = '';
$ishex = false;
for ($i=0;($i<sizeof($string_array));$i++) {
if (strlen($string_array[$i])) {
$string .= chr(hexdec($string_array[$i]));
$hexval .= str_pad($string_array[$i], 2, '0', STR_PAD_LEFT);
if (($i+1) < count($string_array)) {
$hexval .= ':';
}
if ((hexdec($string_array[$i]) <= 31) || (hexdec($string_array[$i]) >= 127)) {
if ((($i+1) == sizeof($string_array)) && ($string_array[$i] == 0)) {
/* do nothing */
}else{
$ishex = true;
}
}
}
}
if ($ishex) $string = $hexval;
}elseif (preg_match('/(hex:\?)?([a-fA-F0-9]{1,2}(:|\s)){5}/i', $string)) {
$octet = '';
/* strip off the 'hex:' */
$string = preg_replace('/hex: ?/i', '', $string);
/* split the hex on the delimiter */
$octets = preg_split('/\s|:/', $string);
/* loop through each octet and format it accordingly */
for ($i=0;($i<count($octets));$i++) {
$octet .= str_pad($octets[$i], 2, '0', STR_PAD_LEFT);
if (($i+1) < count($octets)) {
$octet .= ':';
}
}
/* copy the final result and make it upper case */
$string = strtoupper($octet);
}elseif (preg_match('/Timeticks:\s\((\d+)\)\s/', $string, $matches)) {
$string = $matches[1];
}
foreach($banned_snmp_strings as $item) {
if(strstr($string, $item) != '') {
$string = '';
break;
}
}
return $string;
}
function snmp_escape_string($string) {
global $config;
if (! defined('SNMP_ESCAPE_CHARACTER')) {
if ($config['cacti_server_os'] == 'win32') {
define('SNMP_ESCAPE_CHARACTER', '"');
}else{
define('SNMP_ESCAPE_CHARACTER', "'");
}
}
if (substr_count($string, SNMP_ESCAPE_CHARACTER)) {
$string = substr_replace(SNMP_ESCAPE_CHARACTER, "\\" . SNMP_ESCAPE_CHARACTER, $string);
}
return SNMP_ESCAPE_CHARACTER . $string . SNMP_ESCAPE_CHARACTER;
}
function snmp_get_method($version = 1) {
if ((function_exists('snmpget')) && ($version == 1)) {
return SNMP_METHOD_PHP;
}else if ((function_exists('snmp2_get')) && ($version == 2)) {
return SNMP_METHOD_PHP;
}else if ((function_exists('snmp3_get')) && ($version == 3)) {
return SNMP_METHOD_PHP;
}else if ((($version == 2) || ($version == 3)) && (file_exists(read_config_option('path_snmpget')))) {
return SNMP_METHOD_BINARY;
}else if (function_exists('snmpget')) {
/* last resort (hopefully it isn't a 64-bit result) */
return SNMP_METHOD_PHP;
}else if (file_exists(read_config_option('path_snmpget'))) {
return SNMP_METHOD_BINARY;
}else{
/* looks like snmp is broken */
return SNMP_METHOD_BINARY;
}
}
?>
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