[racktables-users] Re: snmpgeneric.php
- From: Denis Ovsienko <infrastation@xxxxxxxxx>
- To: "racktables-users@xxxxxxxxxxxxx" <racktables-users@xxxxxxxxxxxxx>
- Date: Tue, 21 Aug 2012 16:42:08 +0400
23.07.2012, 22:10, "Samir Patrice" <samir.patrice@xxxxxxxxx>:
> Thanks for information Jim.
> Back to snmp.php, the "Fatal SNMP failure " message is appearing because the
> test in line 1675 is returning a Boolean value false, this is the code:
> if (FALSE === ($sysObjectID = $device->snmpget ('sysObjectID.0')))
>
> Normally it should return the Boolean value true. I am not familiar with php,
> can someone help me understand this test in php?
The PHP manual states: "Returns SNMP object value on success or FALSE on error."
The matter is, this function can return integer 0 for a successful call (when
the remote variable is set to 0). The "===" operator disables PHP's type
casting to distinguish between FALSE and 0, there should be similar use cases
in the code. In this case FALSE means a generic error, specific error code
(timeout or no such variable) should be figured out by some other means. Using
tcpdump is sometimes the fastest option to troubleshoot this error.
--
Denis Ovsienko
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