#!/usr/local/bin/perl
#######################################################
# switchmaker for MRTG
#######################################################
#   Author: Markley Dykeman - 04/27/99
#  Purpose: This program makes an MRTG configuration 
#           file for Cisco 5500 switches.
#    Usage: switchmaker <fqdm> <snmpRO>
# Requires: SNMP-Util-1.6 and SNMP-1.8
#######################################################

my $testing = 0;

# Libraries
use SNMP::Util;
use Socket;
use strict;

# Environment
$ENV{'MAX_LOG_LEVEL'} = 'status';

# Usage display
if (@ARGV < 1){
   print "Usage: \n";
   print "      switchmaker <IP> <community string>\n";
   print "\n";
   print "       IP = IP address or Switch name\n";
   print "       comm = defaults to hostname\n";
   exit;
}

# Arrays
my(%iftype)=(	'1'=>'other',
		'2'=>'cddi',
		'3'=>'fddi',
		'4'=>'tppmd',
		'5'=>'mlt3',
		'6'=>'sddi',
		'7'=>'smf',
		'8'=>'e10BaseT',
		'9'=>'e10BaseF',
		'10'=>'scf',
		'11'=>'e100BaseTX',
		'12'=>'e100BaseT4',
		'13'=>'e100BaseF',
		'14'=>'atmOc3mmf',
		'15'=>'atmOc3smf',
		'16'=>'atmOc3utp',
		'17'=>'e100BaseFsm',
		'18'=>'e10a100BaseTX',
		'19'=>'mii',
		'20'=>'vlanRouter',
		'22'=>'tokenring',
		'23'=>'atmOc12mmf',
		'24'=>'atmOc12smf',
		'25'=>'atmDs3',
		'26'=>'tokenringMmf',
		'27'=>'e1000BaseLX'
		);

# Declare working variables
my ($sysDescr, $sysName, $sysIpAddr, %portGrp, $portIfIndex, $interfacecnt, @result, @oid_list, $iphost);
my (@oid_cutoff, $i);  

# Get command line arguments
my $IP = $ARGV[0];
my $Comm_string = $ARGV[1];

# Open connection to device
my $snmp = new SNMP::Util(-device    => $IP,
                       -community => $Comm_string);

########################
# Get system information
########################

@result = $snmp->next( 'ne', '1.3.6.1.2.1.1.1'); #sysDescr
$sysDescr = $result[1];

@result = $snmp->next( 'ne', '1.3.6.1.2.1.1.5'); #sysName
$sysName = $result[1];

@result = $snmp->next( 'ne', '1.3.6.1.4.1.9.5.1.1.2'); #sysIpAddr
$sysIpAddr = $result[1];

$iphost = gethostbyaddr(pack('C4',split(/\./,$sysIpAddr)), AF_INET); #iphost
if (!defined $iphost || ($iphost eq '')){
   $iphost = 'Unknown DNS name';
}

#########################
# Walk through ports
#########################
@oid_list = (	'1.3.6.1.4.1.9.5.1.4.1.1.11', #portIfIndex
		'1.3.6.1.4.1.9.5.1.4.1.1.5',  #portType
		'1.3.6.1.4.1.9.5.1.4.1.1.10', #portDuplex
		'1.3.6.1.4.1.9.5.1.4.1.1.1',  #portModuleIndex
		'1.3.6.1.4.1.9.5.1.4.1.1.2',  #portIndex
		'1.3.6.1.4.1.9.5.1.4.1.1.4',  #portName
		);
@oid_cutoff = 	'1.3.6.1.4.1.9.5.1.4.1.1.11';

# Walk the MIBs...
my ($more) = 1;
while ($more) {
   @result = $snmp->next(	-format => 'one',
				-oids => \@oid_list,
                    		);

   # Are we done walking?
   if (@result[0] !~ /@oid_cutoff/) {
     $more = 0;
   }

   # if not, process the data
   if ($more) {
      $portIfIndex = $result[2];
      $interfacecnt = $result[2];
      $portGrp{$portIfIndex}{'portIfIndex'} = $result[2];
      $portGrp{$portIfIndex}{'portType'} = $result[5];
      $portGrp{$portIfIndex}{'portDuplex'} = $result[8];
      $portGrp{$portIfIndex}{'portModuleIndex'} = $result[11];
      $portGrp{$portIfIndex}{'portIndex'} = $result[14];
      $portGrp{$portIfIndex}{'portName'} = $result[17];
   }

   # Update OID for snmp->next
   @oid_list = ($result[0],$result[3],$result[6],$result[9],$result[12],$result[15]);

}

##############################
# Walk through MIB2 interfaces 
##############################
@oid_list = (	'1.3.6.1.2.1.2.2.1.1', #ifIndex
		'1.3.6.1.2.1.2.2.1.2', #ifDescr
		'1.3.6.1.2.1.2.2.1.3', #ifType
		'1.3.6.1.2.1.2.2.1.5', #ifSpeed
		'1.3.6.1.2.1.2.2.1.7', #ifAdminStatus
		'1.3.6.1.2.1.2.2.1.8', #ifOperStatus
		);
@oid_cutoff =	'1.3.6.1.2.1.2.2.1.1';


# Walk the MIBs...
my ($more) = 1;
while ($more) {
   @result = $snmp->next(	-format => 'one',
     				-oids => \@oid_list,
                    		);

   # Are we done walking?
   if (@result[0] !~ /@oid_cutoff/) {
     $more = 0;
   }

   # if not, process the data
   if ($more) {
      $portIfIndex = $result[2];

      # deal with non-workgroup ports (1 & 2
      if ($portGrp{$portIfIndex}{'portIfIndex'} eq "") {
         $portGrp{$portIfIndex}{'portIfIndex'} = $result[2];
         if ($portIfIndex eq "1") {
            $portGrp{$portIfIndex}{'portName'} =  $iphost
         } else {
            $portGrp{$portIfIndex}{'portName'} = $result[5];
            $portGrp{$portIfIndex}{'ifDescr'} = $result[8];
         }
      }
      $portGrp{$portIfIndex}{'ifDescr'} = $result[5] if (!($portGrp{$portIfIndex}{'ifDescr'} eq $result[8]));
      $portGrp{$portIfIndex}{'ifType'} = $result[8];
      $portGrp{$portIfIndex}{'ifSpeed'} = $result[11];
      $portGrp{$portIfIndex}{'ifAdminStatus'} = $result[14];
      $portGrp{$portIfIndex}{'ifOperStatus'} = $result[17];
   }

   # Update OID for snmp->next
   @oid_list = ($result[0],$result[3],$result[6],$result[9],$result[12],$result[15]);

}

if ($testing) {
   print "Summary for $sysName ($sysIpAddr), $sysDescr\n";
   for ($i = 1;$i <= $interfacecnt; $i++) {
      print "$portGrp{$i}{'portIfIndex'} ";
      print "$portGrp{$i}{'portType'} ";
      print "$portGrp{$i}{'portDuplex'} ";
      print "$portGrp{$i}{'portModuleIndex'}/";
      print "$portGrp{$i}{'portIndex'} ";
      print "$portGrp{$i}{'portName'}\n";
      print "$portGrp{$i}{'ifDescr'} ";
      print "$portGrp{$i}{'ifType'} ";
      print "$portGrp{$i}{'ifSpeed'} ";
      print "$portGrp{$i}{'ifAdminStatus'} ";
      print "$portGrp{$i}{'ifOperStatus'}\n";
   }
}

#######################################
# Start creating the configuration file
#######################################
print "# Add a WorkDir: /some/path line to this file\n\n";

for ($i = 1;$i <= $interfacecnt; $i++) {

   my $slash;
   if ($portGrp{$i}{'portModuleIndex'} eq '') {
      $slash = " ";
   } else {
      $slash = "/";
   }

   my $c;
   my $ifSpeed = $portGrp{$i}{'ifSpeed'};
   my $speedStr = &fmi($ifSpeed);

   if (!($portGrp{$i}{'ifAdminStatus'} eq "up")) {
      print <<ECHO;
########
######## This Interface is one of the following
######## - administratively not UP
######## - it is in test mode
######## - it is a softwareLoopback interface
######## - has a unrealistic speed setting
######## It is commented out for this reason.
########
ECHO
      $c="# ";
   } else {
      $c = '';
   }
   print <<ECHO;
${c}
${c}Target[$iphost.$i]: $i:$Comm_string\@$sysIpAddr
${c}MaxBytes[$iphost.$i]: $ifSpeed
${c}Title[$iphost.$i]: $portGrp{$i}{'portModuleIndex'}$slash$portGrp{$i}{'portIndex'} $portGrp{$i}{'portName'} -- $portGrp{$i}{'ifDescr'}
${c}Options[$iphost.$i]: growright, bits
${c}PageTop[$iphost.$i]: <H1>Traffic Analysis for $portGrp{$i}{'portModuleIndex'}$slash$portGrp{$i}{'portIndex'} $portGrp{$i}{'portName'} </H1>
${c} <TABLE>
${c}   <TR><TD>System:</TD><TD>$iphost.$i</TD></TR>
${c}   <TR><TD>Interface:</TD><TD> $portGrp{$i}{'portModuleIndex'}$slash$portGrp{$i}{'portIndex'} $portGrp{$i}{'portName'} -- $portGrp{$i}{'ifDescr'} ($i)</TD></TR>
${c}   <TR><TD>Max Speed:</TD>
${c}       <TD> $speedStr ($portGrp{$i}{'portType'}) ($portGrp{$i}{'portDuplex'})</TD></TR>
${c}  </TABLE>
${c}
##---------------------------------------------------------------
ECHO

}

##############################
# Any errors?
##############################
my $error = $snmp->error;
if ($error){
   print "error = $error\n";
}

sub fmi {
  my($number) = $_[0];
  my(@short);
  $number=$number;
  @short = ("b/s","kb/s","Mb/s","Gb/s");
  my $digits=length("".$number);
  my $divm=0;
  while ($digits-$divm*3 > 4) { $divm++; }
  my $divnum = $number/10**($divm*3);
  return sprintf("%1.1f %s",$divnum,$short[$divm]);
}