Hi, I am writing a script to generate a config file for monitoring purpose. In this script, I'd like to have a function which do a snmp bulk_request using Net::SNMP, for each device I monitor. My devices are switches, and my final goal with this function is to make SNMP requests so I can get all the values I need for all the ports. For this, I used the example provided in the doc https://metacpan.org/pod/Net::SNMP#Non-blocking-SNMPv2c-get-bulk-request-for-ifTable as a starting point. I am able to get it working, but I would like to make the example a function to integrate it in my script

sub getSNMP {
my $OID_ifTable = '1.3.6.1.2.1.2.2';
my $OID_ifPhysAddress = '1.3.6.1.2.1.2.2.1.6';
my $host = shift;
my ($session, $error) = Net::SNMP->session(
    -hostname    => $host || 'localhost',
    -community   =>'maectn',
    -nonblocking => 1,
    -translate   => [-octetstring => 0],
    -version     => 'snmpv2c',
);

if (!defined $session) {
    printf "ERROR: %s.\n", $error;
    exit 1;
}

my %table; # Hash to store the results

my $result = $session->get_bulk_request(
   -varbindlist    => [ $OID_ifTable ],
   -callback       => [ \&table_callback, \%table ],
   -maxrepetitions => 10,
);

if (!defined $result) {
    printf "ERROR: %s\n", $session->error();
   $session->close();
   exit 1;
}
# Now initiate the SNMP message exchange.

snmp_dispatcher();

$session->close();

# Print the results, specifically formatting ifPhysAddress.
for my $oid (Net::SNMP::oid_lex_sort(keys %table)) {
   if (!oid_base_match($OID_ifPhysAddress, $oid)) {
      printf "%s = %s\n", $oid, $table{$oid};
   } else {
      printf "%s = %s\n", $oid, unpack 'H*', $table{$oid};
   }
}

}
sub table_callback
{
    my ($session, $table) = @_;
    my $OID_ifTable = '1.3.6.1.2.1.2.2';

    my $list = $session->var_bind_list();

    if (!defined $list) {
       printf "ERROR: %s\n", $session->error();
       return;
    }
    my @names = $session->var_bind_names();
    my $next  = undef;

    while (@names) {
       $next = shift @names;
       if (!oid_base_match($OID_ifTable, $next)) {
          return; # Table is done.
       }
       $table->{$next} = $list->{$next};
    }
    my $result = $session->get_bulk_request(
       -varbindlist    => [ $next ],
       -maxrepetitions => 10,
    );

    if (!defined $result) {
       printf "ERROR: %s.\n", $session->error();
    }

    return;
}
[download]

I call the function getSNMP this way

getSNMP($self->{ip});
[download]

The problem is that when I call the function, the query do not work, when I insert print statements for debugging, it shows nothing. Can you Monks give me some pointers to put me in the right direction? Thank you

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