(PHP 4, PHP 5, PHP 7, PHP 8)
snmpwalkoid — Query for a tree of information about a network entity
$hostname,$community,$object_id,$timeout = -1,$retries = -1
snmpwalkoid() function is used to read all object ids
and their respective values from an SNMP agent specified by
hostname.
The existence of snmpwalkoid() and snmpwalk() has historical reasons. Both functions are provided for backward compatibility. Use snmprealwalk() instead.
hostnameThe SNMP agent.
communityThe read community.
object_id
If null, object_id is taken as the root of
the SNMP objects tree and all objects under that tree are returned as
an array.
If object_id is specified, all the SNMP objects
below that object_id are returned.
timeoutThe number of microseconds until the first timeout.
retriesThe number of times to retry if timeouts occur.
Returns an associative array with object ids and their respective
object value starting from the object_id
as root or false on error.
Exemplo #1 snmpwalkoid() Example
<?php
$a = snmpwalkoid("127.0.0.1", "public", "");
for (reset($a); $i = key($a); next($a)) {
echo "$i: $a[$i]<br />\n";
}
?>
Above function call would return all the SNMP objects from the SNMP agent running on localhost. One can step through the values with a loop
make sure you install "snmp-mibs-downloader" in debian.
apt-get install snmp-mibs-downloader
you my also need to edit your /etc/apt/sources.list
deb http://ftp.us.debian.org/debian/ wheezy main contrib non-free
deb-src http://ftp.us.debian.org/debian/ wheezy main contrib non-free
The above note mentions that the MAC addresses come back converted to integers or something funky like that. Not sure why that is happening but I fixed that with a wrapper function.
function PadMAC($mac) {
$mac_arr = explode(':',$mac);
foreach($mac_arr as $atom) {
$atom = trim($atom);
$newarr[] = sprintf("%02s",$atom);
}
$newmac = implode(':',$newarr);
return $newmac;
}
Maybe that will help somebody with that issue. I know I personally use the heck out of these user contributed notes
Looks like timeout is in MICRO seconds.
1,000,000 µs = 1 s
N.B. it's possible for snmpwalkoid to lose data - the "rmon.matrix.matrixSDTable" table for example uses binary mac addresses as part of the index, these get converted to ascii, and by the time they get to php they can be non-unique - so some entrys in the table get lost...
