#!/opt/gnu/bin/perl
# -*- mode: Perl -*-
##################################################################
# Config file creator
##################################################################
# Cloned form cfgmaker Mark Trettin <mkt@lucent.com>
# Created by Tobias Oetiker <oetiker@ee.ethz.ch>
# this produces a config file for one router, by bulling info
# off the router via snmp
#################################################################
#
# Distributed under the GNU copyleft
#
# $Id: atmmaker,v 1.1.1.1 2002/02/26 10:16:31 oetiker Exp $
#
use SNMP_Session;
use BER;
use Socket;
use strict;

%snmpget::OIDS = (  'sysDescr' => '1.3.6.1.2.1.1.1.0',
		    'sysContact' => '1.3.6.1.2.1.1.4.0',
		    'sysName' => '1.3.6.1.2.1.1.5.0',
		    'sysLocation' => '1.3.6.1.2.1.1.6.0',
		    'sysUptime' => '1.3.6.1.2.1.1.3.0',
		    'ifNumber' =>  '1.3.6.1.2.1.2.1.0',
		    ###################################
		    # add the ifNumber ....
		    'ifDescr' => '1.3.6.1.2.1.2.2.1.2',
		    'ifType' => '1.3.6.1.2.1.2.2.1.3',
		    'ifIndex' => '1.3.6.1.2.1.2.2.1.1',
		    'ifSpeed' => '1.3.6.1.2.1.2.2.1.5', 
		    'ifOperStatus' => '1.3.6.1.2.1.2.2.1.8',		 
		    'ifAdminStatus' => '1.3.6.1.2.1.2.2.1.7',		 
		    # up 1, down 2, testing 3
		    'ipAdEntAddr' => '1.3.6.1.2.1.4.20.1.1',
		    'ipAdEntIfIndex' => '1.3.6.1.2.1.4.20.1.2',
		    'sysObjectID' => '1.3.6.1.2.1.1.2.0',
		    'CiscolocIfDescr' => '1.3.6.1.4.1.9.2.2.1.1.28',
		    # asx port group info
		    'asxPortAdmnStat' => '1.3.6.1.4.1.326.2.2.2.1.2.2.1.2',
		    'asxPortOperStat' => '1.3.6.1.4.1.326.2.2.2.1.2.2.1.3',
		    'asxPortRemoteIpAddress'=> '1.3.6.1.4.1.326.2.2.2.1.2.2.1.6',
		    'asxPortILMIRemoteIpAddress' => '1.3.6.1.4.1.326.2.2.2.1.2.2.1.22',
		    'asxPortMaxBandwidthIn' => '1.3.6.1.4.1.326.2.2.2.1.2.2.1.9',
		    'asxhwPortName' => '1.3.6.1.4.1.326.2.2.1.1.2.3.1.13',
		    'asxPortNumber' => '1.3.6.1.4.1.326.2.2.2.1.2.2.1.1',
		 );




sub main {


  my(%ifType_d)=('1'=>'Other',
		 '2'=>'regular1822',
		 '3'=>'hdh1822',
		 '4'=>'ddnX25',
		 '5'=>'rfc877x25',
		 '6'=>'ethernetCsmacd',
		 '7'=>'iso88023Csmacd',
		 '8'=>'iso88024TokenBus',
		 '9'=>'iso88025TokenRing',
		 '10'=>'iso88026Man',
		 '11'=>'starLan',
		 '12'=>'proteon10Mbit',
		 '13'=>'proteon80Mbit',
		 '14'=>'hyperchannel',
		 '15'=>'fddi',
		 '16'=>'lapb',
		 '17'=>'sdlc',
		 '18'=>'ds1',
		 '19'=>'e1',
		 '20'=>'basicISDN',
		 '21'=>'primaryISDN',
		 '22'=>'propPointToPointSerial',
		 '23'=>'ppp',
		 '24'=>'softwareLoopback',
		 '25'=>'eon',
		 '26'=>'ethernet-3Mbit',
		 '27'=>'nsip',
		 '28'=>'slip',
		 '29'=>'ultra',
		 '30'=>'ds3',
		 '31'=>'sip',
		 '32'=>'frame-relay',
		 '33'=>'rs232',
		 '34'=>'para',
		 '35'=>'arcnet',
		 '36'=>'arcnetPlus',
		 '37'=>'atm',
		 '38'=>'miox25',
		 '39'=>'sonet',
		 '40'=>'x25ple',
		 '41'=>'iso88022llc',
		 '42'=>'localTalk',
		 '43'=>'smdsDxi',
		 '44'=>'frameRelayService',
		 '45'=>'v35',
		 '46'=>'hssi',
		 '47'=>'hippi',
		 '48'=>'modem',
		 '49'=>'aal5',
		 '50'=>'sonetPath',
		 '51'=>'sonetVT',
		 '52'=>'smdsIcip',
		 '53'=>'propVirtual',
		 '54'=>'propMultiplexor',
		 '55'=>'100BaseVG'
		 );

  my($community,$router) = split /\@/, $ARGV[0];
  die <<USAGE  unless $community && $router;

USAGE: cfgmaker 'community'\@'router'

EXAMPLE:  cfgmaker public\@ezwf7.ethz.ch >>mrtg.cfg

USAGE

  
  my($sysDescr,$sysContact,$sysName,$sysLocation,$ifNumber,$sysObjectID) =
    snmpget($router,$community,
	    'sysDescr','sysContact','sysName',	'sysLocation', 'ifNumber',
	    'sysObjectID');
   $sysDescr =~ s/\r/<BR>/g;  # Change returns to <BR>
   my($cisco_router_sysid) = '1\.3\.6\.1\.4\.1\.9';
   my($ciscobox) = ($sysObjectID =~ /^$cisco_router_sysid/);
   my($foreasx_switch_sysid) = '1\.3\.6\.1\.4\.1\.326';
   my($foreasx) = ($sysObjectID =~ /^$foreasx_switch_sysid/);

    print <<ECHO;


######################################################################
# Description: $sysDescr
#     Contact: $sysContact
# System Name: $sysName
#    Location: $sysLocation
#.....................................................................
ECHO

  my @ipadent = snmpgettable($router,$community, 'ipAdEntAddr');
  my @ipadentif = snmpgettable($router,$community, 'ipAdEntIfIndex');

  my(%ipaddr, %iphost,$index);
  while (scalar @ipadentif){
    $index = shift @ipadentif;
    $ipaddr{$index} = shift @ipadent;
    $iphost{$index} = 
      gethostbyaddr(pack('C4',split(/\./,$ipaddr{$index})), AF_INET);
    if ($iphost{$index} eq ''){
	 $iphost{$index} = 'No hostname defined for IP address';
    }
  }

  my(@ifdescr) = snmpgettable($router,$community, 'ifDescr');
  my(@iftype) = snmpgettable($router,$community, 'ifType');
  my(@ifspeed) = snmpgettable($router,$community, 'ifSpeed');
  my(@ifadminstatus) = snmpgettable($router,$community, 'ifAdminStatus');
  my(@ifoperstatus) = snmpgettable($router,$community, 'ifOperStatus');
  my(@ifindex) = snmpgettable($router,$community, 'ifIndex');

  # Get the user configurable interface description entered in the config 
  # if it's a cisco-box
  my @ciscodescr;
  if ($ciscobox) {
      @ciscodescr = snmpgettable($router,$community, 'CiscolocIfDescr');
  }


  if ($foreasx) {
      # Get the FORE ATM Switch port configurations
      # if it's a ASX Switch

      my @asxipaddress;
      my @asxilmiaddress;
      my @asxifadminstatus;
      my @asxifoperstatus;
      my @asxifilmiaddress;
      my @asxifipaddress;
      my @asxmaxbandwidthin;
      my @asxhwportname;
      my @asxportnumber;

      @asxportnumber = snmpgettable($router,$community, 'asxPortNumber');
      @asxhwportname = snmpgettable($router,$community, 'asxhwPortName');
      @asxipaddress = snmpgettable($router,$community, 'asxPortRemoteIpAddress');
      @asxilmiaddress = snmpgettable($router,$community, 'asxPortILMIRemoteIpAddress');
      @asxmaxbandwidthin = snmpgettable($router,$community, 'asxPortMaxBandwidthIn');
      @asxifadminstatus = snmpgettable($router,$community, 'asxPortAdmnStat');
      @asxifoperstatus = snmpgettable($router,$community, 'asxPortOperStat');


      my(%ipaddr, %iphost,%ipiladdr, %ipilhost);

      my(%sportnumber, %sportname, %sifadminstatus, %sifoperstatus, %smaxbandwidth);

      while (scalar @asxportnumber) {
	    $index = shift @asxportnumber;
	    $sportnumber{$index} = $index;
	    $sportname{$index} = shift @asxhwportname;
	    $smaxbandwidth{$index} = shift @asxmaxbandwidthin;
	    $sifadminstatus{$index} = shift @asxifadminstatus;
	    $sifoperstatus{$index} = shift @asxifoperstatus;
	    $ipaddr{$index} = shift @asxipaddress;
	    $ipiladdr{$index} = shift @asxilmiaddress;

	    $iphost{$index} = 
	      gethostbyaddr(pack('C4',split(/\./,$ipaddr{$index})), AF_INET);
	    if ($iphost{$index} eq ''){
		 $iphost{$index} = $ipaddr{$index};
	    }
	    $ipilhost{$index} = 
	      gethostbyaddr(pack('C4',split(/\./,$ipiladdr{$index})), AF_INET);
	    if ($ipilhost{$index} eq ''){
		 $ipilhost{$index} = $ipiladdr{$index};
	    }
      }

      foreach $index (keys %sportnumber) {
 	my $c;
	my $speed = int($smaxbandwidth{$index}*53); # cells to bytes
 	my $speed_str=&fmi($speed);
	my $name="$router.$index";

	if (($sifoperstatus{$index} != 1)
		&& ($sifadminstatus{$index} == 3)) {
	    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}
${c}Target[$name]: CellsRcvd.$index&CellsTrans.$index:$community\@$router \* 53
${c}MaxBytes[$name]: $speed
${c}Options[$name]: growright
${c}WithPeak[$name]: dwmy
${c}Title[$name]: $sysName ($iphost{$index}): $sportname{$index}
${c}PageTop[$name]: <H1>Traffic Analysis for $sportname{$index}
${c} </H1>
${c} <TABLE>
${c}   <TR><TD>System:</TD><TD>$sysName in $sysLocation</TD></TR>
${c}   <TR><TD>Maintainer:</TD><TD>$sysContact</TD></TR>
${c}   <TR><TD>Interface:</TD><TD>$sportname{$index} ($index)</TD></TR>
ECHO
	print <<ECHO if $iphost{$index}!="255.255.255.255";
${c}   <TR><TD>Remote IP:</TD><TD>$iphost{$index} ($ipaddr{$index})</TD></TR>
ECHO
	print <<ECHO if $ipilhost{$index}!="255.255.255.255";
${c}   <TR><TD>Remote ILMI IP:</TD><TD>$ipilhost{$index} ($ipiladdr{$index})</TD></TR>
ECHO
	print <<ECHO;
${c}   <TR><TD>Max Speed:</TD>
${c}       <TD>$speed_str (Sonet)</TD></TR>
${c}  </TABLE>
${c}
#---------------------------------------------------------------
ECHO
    }
  }
  else {

	  my(%sifdesc,%siftype,%sifspeed,%sifadminstatus,%sifoperstatus,%sciscodescr);
	  while (scalar @ifindex) {
	  # as these arrays get filled from the bottom, 
	  # we need to empty them from the botom as well ...
	  # fifo
	    $index = shift @ifindex;
	    $sifdesc{$index} = shift @ifdescr;
	    $siftype{$index} = shift @iftype;
	    print STDERR $siftype{$index};
	    $sifspeed{$index} = shift @ifspeed;
	    $sifadminstatus{$index} = shift @ifadminstatus;
	    $sifoperstatus{$index} = shift @ifoperstatus;
	    # especially since cisco does not return a if
	    # descr for each interface it has ...
	    $sciscodescr{$index} = "<BR>" . (shift @ciscodescr) if @ciscodescr;
	}

	foreach $index (keys %sifdesc) {
	my $c;
	my $speed = int($sifspeed{$index} / 8); # bits to byte
 	my $speed_str=&fmi($speed);
	my $name="$router.$index";

	if (($sifadminstatus{$index} != 1)
		|| ($siftype{$index} == 24)
		|| ($speed == 0 ) 
		|| ($speed > 400 * 10**6)  #speeds of 400 MByte/s are not realistic
		|| ($sifoperstatus{$index} == 3)) {
	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}
${c}Target[$name]: $index:$community\@$router
${c}MaxBytes[$name]: $speed
${c}Options[$name]: growright
${c}WithPeak[$name]: dwmy
${c}Title[$name]: $sysName ($iphost{$index}): $sifdesc{$index}
${c}PageTop[$name]: <H1>Traffic Analysis for $sifdesc{$index}
${c} $sciscodescr{$index}</H1>
${c} <TABLE>
${c}   <TR><TD>System:</TD><TD>$sysName in $sysLocation</TD></TR>
${c}   <TR><TD>Maintainer:</TD><TD>$sysContact</TD></TR>
${c}   <TR><TD>Interface:</TD><TD>$sifdesc{$index} ($index)</TD></TR>
${c}   <TR><TD>IP:</TD><TD>$iphost{$index} ($ipaddr{$index})</TD></TR>
${c}   <TR><TD>Max Speed:</TD>
${c}       <TD>$speed_str ($ifType_d{$siftype{$index}})</TD></TR>
${c}  </TABLE>
${c}
#---------------------------------------------------------------
ECHO
  }
 }
}
  
main;
exit(0);

sub snmpget{  
  my($host,$community,@vars) = @_;
  my(@enoid, $var,$response, $bindings, $binding, $value, $inoid,$outoid,
     $upoid,$oid,@retvals);
  foreach $var (@vars) {
    die "Unknown SNMP var $var\n" 
      unless $snmpget::OIDS{$var};
    push @enoid,  encode_oid((split /\./, $snmpget::OIDS{$var}));
  }
  srand();
  my $session = SNMP_Session->open ($host ,
                                 $community, 
                                 161);
  if ($session->get_request_response(@enoid)) {
    $response = $session->pdu_buffer;
    ($bindings) = $session->decode_get_response ($response);
    $session->close ();    
    while ($bindings) {
      ($binding,$bindings) = decode_sequence ($bindings);
      ($oid,$value) = decode_by_template ($binding, "%O%@");
      my $tempo = pretty_print($value);
      $tempo=~s/\t/ /g;
      $tempo=~s/\n/ /g;
      $tempo=~s/^\s+//;
      $tempo=~s/\s+$//;

      push @retvals,  $tempo;
    }
    
    return (@retvals);
  } else {
    die "No answer from $ARGV[0]. You may be using the wrong community\n";
  }
}

sub snmpgettable{
  my($host,$community,$var) = @_;
  my($next_oid,$enoid,$orig_oid, 
     $response, $bindings, $binding, $value, $inoid,$outoid,
     $upoid,$oid,@table,$tempo);
  die "Unknown SNMP var $var\n" 
    unless $snmpget::OIDS{$var};
  
  $orig_oid = encode_oid(split /\./, $snmpget::OIDS{$var});
  $enoid=$orig_oid;
  srand();
  my $session = SNMP_Session->open ($host ,
                                 $community, 
                                 161);
  for(;;)  {
    if ($session->getnext_request_response(($enoid))) {
      $response = $session->pdu_buffer;
      ($bindings) = $session->decode_get_response ($response);
      ($binding,$bindings) = decode_sequence ($bindings);
      ($next_oid,$value) = decode_by_template ($binding, "%O%@");
      # quit once we are outside the table
      last unless BER::encoded_oid_prefix_p($orig_oid,$next_oid);
      $tempo = pretty_print($value);
      #print "$var: '$tempo'\n";
      $tempo=~s/\t/ /g;
      $tempo=~s/\n/ /g;
      $tempo=~s/^\s+//;
      $tempo=~s/\s+$//;
      push @table, $tempo;
     
    } else {
      die "No answer from $ARGV[0]\n";
    }
    $enoid=$next_oid;
  }
  $session->close ();    
  return (@table);
}

sub fmi {
  my($number) = $_[0];
  my(@short);
  @short = ("Bytes/s","kBytes/s","MBytes/s","GBytes/s","TBytes/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]);
}