Hex return needs to be unpacked?

c has asked for the wisdom of the Perl Monks concerning the following question:

I am using SNMP.pm to gather some information from routers on my company network. For one OID in particular, when the query returns a valid answer, all goes well and my variable is set to the value of the response:

my $response = $session->get("$oid");
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However, when the query receives an null string from the remote device, the variable $response is set to a hex value:

enterprises.9.9.23.1.2.1.1.6.1.1 =  Hex: 00 00 00 00 00 00 82 48 0C 00
+ 01 4D 48 0C 00 00
A8 48 0C 00 00 EE 48 0C 00 00 00 00 01 00 00 00
03 00 00 00 06 00 00 00 01 00 00 00 02 00 00 00
01 00 00 00 11 00 00 00 07 00 00 00 01 00 00 00
03 00 00
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Is this something that I can use unpack to find a string response?

thanks -c

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Re: Hex return needs to be unpacked? by Ryszard (Priest) on Mar 03, 2002 at 06:52 UTC
You have a conflicting statement here. If $response is a hex value, then, by definition you're query cant have returned a null (or rather undef), unless there is some default thing in the pm. `print pack("H*", $response);` I think is the answer to your question.	[reply] [d/l]