#!/usr/bin/perl -w

use Net::SNMP;
use strict;
use warnings;
use diagnostics;
use XML::Simple;
use Data::Dumper;

#open xml file
my $xmlfile = "e:/topo.xml";



my $ref = eval { XMLin($xmlfile) };


#erase or creat the ipfile
open ERASER, ">ipfile.txt";
close ERASE;

#see if open worked
if ($@)
{
	print "XML Read ERROR";
 } 
 	else 
 		{		
		#go to IPAddress tag and read infos into file
		foreach my $item (@{$ref->{Layer2Details}->{Device}}){
			
			my @ipliste = $item->{IPAddress};
				
			my @sorted = @ipliste;
			open OUTIP, ">>ipfile.txt";
			print OUTIP @sorted, "\n";
			close OUTIP;
		}
 }


 #open ipfile
 open IPFILE, "ipfile.txt" or die "Can't get IPs - $!\n";

    

                                                                      
#Sets knots und community          
my $community = 'public';
my $ifIndex   = '1.3.6.1.2.1.47.1.1.1.1.6';  
my $ifDescr   = '1.3.6.1.2.1.47.1.1.1.1.11'; 
my $ifDescr2   = '1.3.6.1.2.1.47.1.1.1.1.2';  


#erase or create files
open ERASER, ">serlist.txt";
close ERASE;
open ERASER, ">desclist.txt";
close ERASE;
open ERASER, ">finallist.txt";
close ERASE;



while ( my $ip = <IPFILE> )
{
	chomp $ip;
	print "Got: $ip\n";                                                                  

	#open session
    my ( $session, $error ) = Net::SNMP->session(
        -hostname  => $ip,
        -community => $community,
        -port      => 161
    );
    my $response;
                                                                      
	#goto index table and hash index
    if ( defined( $response = $session->get_table($ifIndex) ) )
    {
	   
	   
	    #get serialnumbers
        foreach my $index ( values  %{$response} ) 
        {
	    my $this_desc = "$ifDescr.$index";
            my $description;
            if ( defined( $description = $session->get_request($this_desc) ) )
            {
		   
		#print serialno. to file
		    my @serial = values %{$description};
		  open OUTPUT1, ">>serlist.txt";
		  print OUTPUT1 @serial, "\n";
		  close OUTPUT1;
	
	    }
        }


	#get description
        foreach my $index ( values  %{$response} ) 
        {
	    my $this_desc = "$ifDescr2.$index";
            my $description2;
            if ( defined( $description2 = $session->get_request($this_desc) ) )
            {


		    #print describtion to file
		    my @desc = values %{$description2};
		    open OUTPUT2, ">>desclist.txt";
		    print OUTPUT2 @desc, "\n";
		    close OUTPUT2;
		   
            }
   			
   	
    }   
	
    #creat final file
	open(OUT, "serlist.txt");
	open(OUT2, "desclist.txt");
	my @outlist;
	while (<OUT>)
		{
		my %hash;
		my @temp = split(/;/,$_);
		$hash{'file1'} = $temp[0];
		$hash{'file2'} = <OUT2>;
		
		#delete Return
		foreach (values %hash)
			{
			$_ =~ s/\n//g;
			}
		push(@outlist,\%hash);
		}
	close(OUT);

	#print to file
	open FINOUT, ">>finallist.txt";
	print FINOUT "$ip\n"; 
	foreach my $hashref (@outlist)
	{
		print FINOUT "$hashref->{'file1'};$hashref->{'file2'}\n";
	}
    print FINOUT "\n";
    close FINOUT;
    }
    

    #close session
    $session->close();
}