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Digg  snmprealwalk
Return all objects including their respective object ID within the specified one
(PHP 4, PHP 5)
Code Examples / Notes » snmprealwalkscot
Some improvements based on testing a lot of OIDs on a lot of devices. <?php function snmptable($host, $community, $oid) { // TODO: get original state and restore at bottom snmp_set_oid_numeric_print(TRUE); snmp_set_quick_print(TRUE); snmp_set_enum_print(TRUE); $retval = array(); $raw = snmprealwalk($host, $community, $oid); if (count($raw) == 0) return ($retval); // no data $prefix_length = 0; $largest = 0; foreach ($raw as $key => $value) { if ($prefix_length == 0) { // don't just use $oid's length since it may be non-numeric $prefix_elements = count(explode('.',$oid)); $tmp = '.' . strtok($key, '.'); while ($prefix_elements > 1) { $tmp .= '.' . strtok('.'); $prefix_elements--; } $tmp .= '.'; $prefix_length = strlen($tmp); } $key = substr($key, $prefix_length); $index = explode('.', $key, 2); isset($retval[$index[1]]) or $retval[$index[1]] = array(); if ($largest < $index[0]) $largest = $index[0]; $retval[$index[1]][$index[0]] = $value; } if (count($retval) == 0) return ($retval); // no data // fill in holes and blanks the agent may "give" you foreach($retval as $k => $x) { for ($i = 1; $i <= $largest; $i++) { if (! isset($retval[$k][$i])) { $retval[$k][$i] = ''; } } ksort($retval[$k]); } return($retval); } ?> lars troen
snmprealwalk indexes the values using the oid instead of an integer. This is useful when you need data that is contained in the oid as well as the value. Here's an example for retrieving and printing vlan info: // // I have collected the vlan identifiers earlier from the 3com mib and they are stored in the $vlan table. // for($n=0;$n<count($vlan);$n++){ print $vlan[$n][id]." ".$vlan[$n][name]." \n"; $ifStackStatusTable=@snmprealwalk($switch, $community, ".1.3.6.1.2.1.31.1.2.1.3.".$vlan[$n][id]); // ifMIB.ifMIBObjects.ifStackTable.ifStackEntry.ifStackStatus for(reset($ifStackStatusTable); $port = key($ifStackStatusTable); next($ifStackStatusTable)){ print "$port=$ifStackStatusTable[$port] "; } scot
Since PHP doesn't have a nice snmptable-like function... here is a quick-and-dirty hack that works for me. Works on complete and sparse tables. The example oids are for the route (complete) and interface (often sparse) tables. <?php $a = snmptable("10.1.1.1", "public", ".1.3.6.1.2.1.4.21") or die("error"); print_r($a); $a = snmptable("10.1.1.1", "public", ".1.3.6.1.2.1.2.2") or die("error"); print_r($a); function snmptable($host, $community, $oid) { // TODO: get original state and restore at bottom snmp_set_oid_numeric_print(TRUE); snmp_set_quick_print(TRUE); snmp_set_enum_print(TRUE); $retval = array(); $raw = snmprealwalk($host, $community, $oid) or die("snmptable: unable to walk OID $oid"); $prefix_length = 0; foreach ($raw as $key => $value) { if ($prefix_length == 0) { // don't just use $oid's length since it may be non-numeric $prefix_elements = count(explode('.',$oid)); $tmp = '.' . strtok($key, '.'); while ($prefix_elements > 1) { $tmp .= '.' . strtok('.'); $prefix_elements--; } $tmp .= '.'; $prefix_length = strlen($tmp); } $key = substr($key, $prefix_length); $index = explode('.', $key, 2); isset($retval[$index[1]]) or $retval[$index[1]] = array(); isset($firstrow) or $firstrow = $index[1]; $retval[$index[1]][$index[0]] = $value; } // check for holes in the table and fill them in foreach ($retval[$firstrow] as $key => $tmp) { foreach($retval as $check => $tmp2) { if (! isset($retval[$check][$key])) { $retval[$check][$key] = ''; } } } return($retval); } ?> stephen cope
Here's a way to find the uptime and number of users on a machine. (Note that uptime is the uptime of the snmpd daemon, which should be fairly close to the uptime for the host.) <?php $state = snmprealwalk($host, "public", ".1.3.6.1.2.1.25.1", 50, 1); $uptime = ereg_replace("^.*\) ([0-9]+ .*):[0-9][0-9]\.[0-9]{2}.*$", "\\1", $state['host.hrSystem.hrSystemUptime.0']); $users = (int)ereg_replace("Gauge32: ", "", $state['host.hrSystem.hrSystemNumUsers.0']); printf('<div class="machine"><dt>%s</dt><dd>%s</dd>', $host, $desc); printf('<dd>up %s</dd>', $uptime); if ( $users ) printf('<dd>%d user%s</dd>', $users, ($users > 1) ? 's' : ''); printf('</div>'); ?> railson
Attention: timeout is in microseconds (multiply by 1,000,000 for seconds)
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