PHP snmpwalk

深藏阁楼爱情的钟 2023-10-18 23:34 79阅读 0赞

## snmpwalk ##

(PHP 4, PHP 5, PHP 7)

snmpwalk — 从代理返回所有的 SNMP 对象

#### 说明 ####

**snmpwalk** ( string `$hostname` , string `$community` , string `$object_id` \[, int `$timeout` \[, int`$retries` \]\] ) : array

返回由 `object_id` 作为根的 SNMP 对象值所组成的数组，错误则返回 **`FALSE`**。

**snmpwalk()** 函数是用来读取所有由 `hostname` 指定的 SNMP 代理的值。`Community` 指定该代理中具有读权限的域。一个为 **`NULL`** 的 `object_id` 将被看作 SNMP 对象树的根，而在此树下的所有对象将作为一个数组被返回。如果指定了 `object_id`，则返回所有在 `object_id` 下的 SNMP 对象。

`<?php $a = snmpwalk("127.0.0.1", "public", ""); ?>`

上边的函数调用将从运行于本机的 SNMP 代理那里返回所有的 SNMP 对象。可使用循环遍历这些值。

`<?php foreach ($a as $val) { echo "$val\n"; } ?>`

`Timeout is in MICRO seconds. 1,000,000 &micros = 1 s`

/**
      * Do snmpwalk
      *
      * @param unknown_type $rootOID
      * @return array Array of values
      */
     public function GetTree($rootOID = null)
     {
         try {
             $retval = @snmpwalk($this->Connection, $this->Community, $rootOID, $this->Timeout);
         } catch (Exception $e) {
             $this->RaiseWarning("Cannot walk through {$this->Connection}/{$this->Community}/{$rootOID}" . $e->__toString());
         }
         return $retval;
     }

<tr>
            <td colspan = "1">
            <a href='index.php'>HOME</td> 
                	    
                	    
                	   
                	    	
            <td style="height:600px;width:2000px;vertical-align:top;">
            <center><br>
            <form action = "a3n3.php" method = "POST">  
              <?php 
    $IP = $_POST["IP"];
    $PORT = $_POST["PORT"];
    $COMMUNITY = $_POST["COMMUNITY"];
    $int = snmpwalk("{$IP}:{$PORT}", "{$COMMUNITY}", '1.3.6.1.2.1.2.2.1.1', 100000, 5);
    $device = "{$COMMUNITY}-{$IP}-{$PORT}";
    if ($int) {
        echo "The interfaces of the selected device {$COMMUNITY}, {$IP} and {$PORT} are:";
        echo "<br><table border = '1'>";
        foreach ($int as $x) {
            $i = explode(' ', $x);
            echo "<tr><td><input type = 'checkbox' name ='list[]' value = {$i['1']},{$device}> {$i['1']}</td></tr>";
        }
    } else {
        echo "<br>The device is down. Cannot add<br>";
    }
    ?>
         
           </table><br>

private function _sGetCpuInfo($sIp)
     {
         $cpuinfo = array();
         $ret = snmpwalk($sIp, $this->_aConf['community'], 'hrDeviceEntry', 300000);
         if (is_array($ret)) {
             $len = 0;
             foreach ($ret as $k => $v) {
                 list($t, $s) = explode(':', $v);
                 if ('INTEGER' !== $t) {
                     $len = $k;
                     break;
                 }
             }
             for ($i = 0; $i < $len; $i++) {
                 list($t, $s) = explode(':', $ret[$len + $i], 2);
                 if (' HOST-RESOURCES-TYPES::hrDeviceProcessor' == $s) {
                     list($t, $s) = explode(':', $ret[2 * $len + $i], 2);
                     $cpuinfo[trim($s)]++;
                 }
             }
         }
         $ret = array();
         foreach ($cpuinfo as $k => $v) {
             $ret[] = $v . '个逻辑CPU，' . $k;
         }
         return implode(' || ', $ret);
     }