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");

[download]

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

[download]

Is this something that I can use unpack to find a string response?

thanks -c

In reply to Hex return needs to be unpacked? by c

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.