#23685 [Fbk->Csd]: fake values returned when OID value is an empty string

ID: 23685 User updated by: s dot zagrodzki at net dot icm dot edu dot pl Reported By: s dot zagrodzki at net dot icm dot edu dot pl -Status: Feedback +Status: Closed Bug Type: SNMP related Operating System: Linux 2.2 PHP Version: 4.3.2RC4-dev New Comment: oh yes. With php4-STABLE-200307180730 the problem is gone. Previous Comments: ------------------------------------------------------------------------ [2003-07-16 03:58:24] sniper@php.net I said: "Make sure the snapshot is build _later_ than Jul 16, 2003 05:30!!" ------------------------------------------------------------------------ [2003-07-16 02:53:43] s dot zagrodzki at net dot icm dot edu dot pl tried 20030716-0530 version, didn't help. I did some more tests: when I tried snmpwalk()ing ".1.3.6.1.4.1.9.2.2.1.1.28" tree (which is the same as ifAlias, but resides in enterprises.*) the results were correct. Even more, they had double-quotes on both sides of the string. tcpdump showed that all responses are exactly the same - same length and value, but PHP displayed them in another way. My guess was that snmpwalk has problems when it _knows_ that the type of received OID value is DisplayString. Then it doesn't put quotes with value. Simple test - I removed ifAlias definition from IF-MIB.txt and voila - snmpwalk() returns correct values, but with quotes. It seems like php-snmp has problem with empty values (and when OID type is unknown, the result is not an empty value, but string consisting of two quotes. ------------------------------------------------------------------------ [2003-07-16 01:05:19] sniper@php.net Please try using this CVS snapshot: http://snaps.php.net/php4-STABLE-latest.tar.gz For Windows: http://snaps.php.net/win32/php4-win32-STABLE-latest.zip Make sure the snapshot is build later than Jul 16, 2003 05:30!! ------------------------------------------------------------------------ [2003-07-14 15:15:23] harrie@php.net Attempted in various ways, but I cannot reproduce this. Maybe it is a Linux problem, since I do PHP development on a CYGWIN system. Neither do I get the same results as the 'user contributed note' on snmpget. ------------------------------------------------------------------------ [2003-07-14 09:44:57] s dot zagrodzki at net dot icm dot edu dot pl this issue was also mentioned by javierb at gmx dot net in user contributed notes to snmpget() function manual: http://www.php.net/manual/en/function.snmpget.php ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/23685 -- Edit this bug report at http://bugs.php.net/?id=23685&edit=1