Hi There, I hope everyone is doing fine. First off , my perl is really really rusty so please don't laugh :)

Anyway , I've been tinkering on a tool to grab mac addresses with SNMP from Wireless CPE equipment on our network which I then need to write into a Mysql database. Now grabbing the data and writing it back is no issue ... well , that's if I can past understanding on how to read the information Data dumper is returning.

The original code came from a script called snmpwalk.pl which I downloaded from Cpan and then modified it to my needs. Right now it's just passing IP addresses from an array , does an snmpwalk based on a specific IOD and then passes the #hash to Datadumper for processing. Well , that's what I think happens at least :) Now this is where I get stuck , I have no idea how to properly read the processed information so I can write it back line for line into a Mysql DB.

Here's the code.

<------------code---------------->

 #!/usr/bin/perl

use Getopt::Std;
use DBI;

use Net::SNMP::Util qw(:para);
use Net::SNMP::Util::OID qw(*);


my @SMhosts = ('10.4.20.21', '10.4.23.218', '10.4.24.20', '10.4.25.33'
+);

# ---------- Data::Dumper setting ----------
# put output into hands of Data::Dumper :-)
use Data::Dumper;
use Storable qw(lock_nstore);

foreach $unitIP (@SMhosts) {

local($a,$b);
$Data::Dumper::Indent   = 1;
$Data::Dumper::Terse    = 1;
$Data::Dumper::Purity   = 1;
$Data::Dumper::Sortkeys = sub { [ sort {
    # if keys are numbers, then do numerical sort
    return ($a =~ /^\d+$/)? ($a <=> $b): ($a cmp $b);
} keys %{$_[0]} ] };

my %snmp = ();

    $snmp{"-version"} = "2c";
    $snmp{"-community"} = "g_wireless";
    $snmp{"-timeout"} = "2";


# ---------- kick function ----------
my $func = $opt{P}? 'snmpparawalk': 'snmpwalk';


my ( $result, $error );
{
    no strict;
    ( $result, $error ) = &$func(
        hosts => "$unitIP",
        oids  => '1.3.6.1.4.1.161.19.3.3.4.1.1',
                snmp  => \%snmp
    );
    die "[ERROR] $error\n" unless defined $result;
}


# ---------- output result ----------
print  Dumper($result);

}
[download]

<//-----------------code-------------->

<-----------------results------------->

So basically the first value is the IP address of the CPE equipment followed by the Mac addresses contained in the units bridge table. This value varies on the amount of network devices connected to the LAN port of the CPE equipment. Normally , this will only be three if the customer plugged the CPE equipment directly into their routers but more values van appear if the equipment is plugged into a switch for instance. So basically what I want to do is to write each value as a separate row into Mysql but how do I extract each Mac address from the hash ?

[root@cms3 scripts]# ./snmpwalk.pl
{
  '10.4.20.21' => {          #IP Address from CPE equipment.
    '1' => '0x0a003edd8706', #Bridge table entry #1
    '2' => '0x1a003edd8706', #Bridge table entry #2
    '3' => '0xc03f0eddfb3b'  #Bridge table entry #3
  }
}
{
  '10.4.23.218' => {
    '1' => '0x0a003ea2643e',
    '2' => '0x1a003ea2643e',
    '3' => '0x000c428b8e11'
  }
}
{
  '10.4.24.20' => {
    '1' => '0x0a003e67a706',
    '2' => '0x1a003e67a706',
    '3' => '0x200cc8136ef9'
  }
}
{
  '10.4.25.33' => {
    '1' => '0x0a003eb1b2fc',
    '2' => '0x1a003eb1b2fc',
    '3' => '0xd850e6bd6330',
    '4' => '0x023d9d690d52',
    '5' => '0xec2280985442',
    '6' => '0x406186c1ef32',
    '7' => '0x0024219b0d6b',
    '8' => '0x00237d7cd808',
    '9' => '0x00272201b896',
    '10' => '0xf8e903e44b30',
    '11' => '0x52f5febdca85',
    '12' => '0xbe95360a4d5c',
    '13' => '0xac9e17b6007c',
    '14' => '0x000b7483457d',
    '15' => '0xaa069206530b',
    '16' => '0x000c2955956e',
    '17' => '0x54bef72d8cc2',
    '18' => '0x0000859f7d3f',
    '19' => '0x406186c2e658',
    '20' => '0x02759adcc739'
  }
}
[download]