Getting different things from routers and switches via SNMP

[theroninwins]

This prog gets different things from routers which ips and names it parses from an xml file and writes the result in a textfile.

#!/usr/bin/perl -w


######################################################################
+###########
#This program consists of two parts.                        #
#The first part is a xml parser that reads out the IPs and names of   
+      #
#a file given at the start prompt. The program must therefore be calle
+d        #
#with it's name and the filename of the xml-file as parameter:        
+    #
#e.g. "perl walker.pl topo.xml" (topo is then the xml-file that must b
+e parsed    #
#The second part of the program is based on the standard snmpwalk by D
+ave Town.    #
#It reads different OIDs and extracts their infos saving them in diffe
+rent     #
#arrays. It then creates a textfile with ALL entries. This text file  
+       #
#"alllist.txt"(v 1.0) is then parsed again and all unwanted entries ar
+e deleted.#
#the final result is saved in a textfile called "finallist.txt"(v 1.0)
+.        #
#The result is set up as default (v 1.0) like:                     #
#ip;name;serial number;part number;description                    #
#The "alllist.txt", "ipfile.txt" and the "namefile.txt" are afterwards
+ deleted    #
#Program. Walker.pl    Version:1.0     By: Ronin            #
######################################################################
+###########



use Net::SNMP qw(oid_lex_sort oid_base_match SNMP_VERSION_1 DEBUG_ALL)
+;
use strict;
use Getopt::Std;
use warnings;
use diagnostics;
use XML::Simple;
use Data::Dumper;
use vars qw($ip $name $response $response2 $response3 @final1 @final2 
+@final3);



######################################################################
+###########
#This is the first part of the program that parses the information fro
+m the     #
#xml-file saving the resulting IPS in "ipfile.txt"(v1.0) and the resul
+ting     #
#device names in "namefile.txt"(v1.0)                        #
#Program. Walker.pl    Version:1.0     By: Ronin            #
######################################################################
+###########

#open xml file taking the parameter from the prompt
my $xmlfile = $ARGV[0];



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


#erase or create the ipfile and the namefile
open ERASER, ">ipfile.txt";
close ERASER;
open ERASER, ">namefile.txt";
close ERASER;
open ERASER, ">finallist.txt";
close ERASER;
open ERASER, ">alllist.txt";
close ERASER;

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

        #go to DeviceName tag and read infos into file
        foreach my $itemname (@{$ref->{Layer2Details}->{Device}})
        {
           
                   my @nameliste = $itemname->{DeviceName};
                
                    my @sortedname = @nameliste;
                    open OUTNAME, ">>namefile.txt";
                    print OUTNAME @sortedname, "\n";
                    close OUTNAME;
            }
}


######################################################################
+###########
#The second part of the program start here and extracts the informatio
+n wanted    #
#creating the result file                            #
#Program. Walker.pl    Version:1.0     By: Ronin            #         
+           
######################################################################
+###########



#open ipfile
open IPFILE, "ipfile3.txt" or die "Can't get IPs - $!\n";
open NAMES, "namefile3.txt" or die "Can't get IPs - $!\n";

#erase or create the finallist
open ERASER, ">finallist.txt";
close ERASER;
                                                                      
+    
#Sets knots und community          
my $community = 'public';
my $ifSer   = '.1.3.6.1.2.1.47.1.1.1.1.11'; 
my $ifPart  = '.1.3.6.1.2.1.47.1.1.1.1.13'; 
my $ifDesc   = '.1.3.6.1.2.1.47.1.1.1.1.2'; 

#loop the program until all IPs have been worked with
while ( $ip = <IPFILE>, $name = <NAMES> )
{
    
    #save ip and name
    chomp $ip;
    chomp $name;
    
    
    #delete the .bc.de.bic extention
    $name =~ s/\.bc\.de\.bic$//;
    
    #print which IP is being worked with
    print "Got: $ip\n";                 

    
    
    #open session
        my ( $s, $e ) = Net::SNMP->session(
        -hostname  => $ip,
        -community => $community,
        -port      => 161
        );
    if (!defined($s)) 
    {
    print ("Falsch nix is!");
    }


    #bind the OIDs to arrays using varbindlist 
    #to keep the original order of the entries
    my @args = (
    -varbindlist => [$ifSer]
    );
    my @args2 = (
    -varbindlist => [$ifPart]
    );
    my @args3 = (
    -varbindlist => [$ifDesc]
    );



    #check SNMP version
    if ($s->version == SNMP_VERSION_1) 
    {
        
        #extract the wanted information adn save them into an array 
        #using the push statement so the next entry is added at the 
        #end of the array
           while (defined($s->get_next_request(@args))) 
           {
                  $_ = (keys(%{$s->var_bind_list}))[0];
                 if (!oid_base_match($ifSer, $_)) { last; }
                  $response=($s->var_bind_list->{$_});   
                  push @final1, $response;
                  @args = (-varbindlist => [$_]);
        }
 
        while (defined($s->get_next_request(@args2))) 
        {
                  $_ = (keys(%{$s->var_bind_list}))[0];
                  if (!oid_base_match($ifPart, $_)) { last; }
                  $response2 = ($s->var_bind_list->{$_}); 
                  push @final2, $response2; 
                  @args2 = (-varbindlist => [$_]);
           }

        while (defined($s->get_next_request(@args3))) 
           {
                  $_ = (keys(%{$s->var_bind_list}))[0];
                 if (!oid_base_match($ifDesc, $_)) { last; }
                  $response3=($s->var_bind_list->{$_});   
                  push @final3, $response3;
                  @args3 = (-varbindlist => [$_]);
        }
    }
    
    #if version is not 1 then use this
    else 
    {

                 push(@args, -maxrepetitions => 25); 
        
        outer: while (defined($s->get_bulk_request(@args))) 
        {

            my @oids = oid_lex_sort(keys(%{$s->var_bind_list}));

            foreach (@oids) 
                {

                    if (!oid_base_match($ifSer, $_)) { last outer; }
                    #print("%s => %s\n", $_, $s->var_bind_list->{$_});
        
                    # Make sure we have not hit the end of the MIB
                    if ($s->var_bind_list->{$_} eq 'endOfMibView') { l
+ast outer; } 
                }
        
            # Get the last OBJECT IDENTIFIER in the returned list
            @args = (-maxrepetitions => 25, -varbindlist => [pop(@oids
+)]);
        }
 }
    
     
     #create the file with ALL entries
     open OUTPUT, ">alllist.txt";
    
    #print in column style
    for my $i (0 .. $#final1) {  print OUTPUT "$ip;$name;$final1[$i];$
+final2[$i];$final3[$i]\n" }
    close OUTPUT;
    
    #empty the arrays
    @final1=();
    @final2=();
    @final3=();
    

    #create the file with the wanted entries
    open FINISH, "<alllist.txt";
    my @data = grep { !/\S+;;/ } <FINISH>;
    open WRITER,">>finallist.txt";
    print WRITER @data;
    close WRITER;
    close FINISH;


    #close the SNMP session
    $s->close();
}
#delete the alllist.txt, ipfile.txt and namefile.txt file
unlink 'alllist.txt','ipfile.txt','namefile.txt';

exit 0;

janitored by ybiC: Balanced <readmore> tags around longish codeblock, as per Monastery convention