use strict;

use Net::SNMP qw(snmp_dispatcher ticks_to_time oid_lex_sort);

  my ($session, $error) = Net::SNMP->session(
      -hostname    => $_,
      ## -version     => 'snmpv2c',     ## E7 Gen 2 supports only V1
      ##-nonblocking => 1,
      -translate   => [
                   -timeticks => 0x0   # Turn off so sysUpTime is numeric
                      ],
      -community   => $ARGV[1] || 'public',
      -port        => $ARGV[2] || 161,
      -timeout     => 20 # Seconds
   );
   if (!defined($session)) {
      printf("ERROR for %s: %s.\n",$_, $error);
      exit 1;
   }
   &Get_Session_Data($session);

#################################################################
sub Get_Session_Data {
   my $session = shift;

      my $result = $session->get_request(
               -varbindlist => [$sysUpTime, $dot1dStpTopChanges,
                              $dot1dStpDesignatedRoot, $dot1dBaseNumPorts,
                              $dot1dStpTimeSinceTopologyChange ]);
                   ##           ,$dot1dTpFdbTable]  );

      if (!defined($result)) {
         printf("ERROR: %s.\n", $session->error);
         next;
      }


      # my $uptime = $session->var_bind_list()->{$sysUpTime};
      #printf("%-15s  Ok (%s)\n",
      #      $session->hostname, ticks_to_time($uptime) );
      print( $session->hostname . " " .
            &showinfo($session,"TC_count",$dot1dStpTopChanges) .
            &showinfo($session,"rootBridge",$dot1dStpDesignatedRoot) .
            &showinfo($session,"ports",$dot1dBaseNumPorts)   .
            &showinfo($session,"TC_Time",$dot1dStpTimeSinceTopologyChange).
              "\n"
            );
       $x->TC_Count  ($session->var_bind_list()->{$dot1dStpTopChanges});
       $x->RootBridge($session->var_bind_list()->{$dot1dStpDesignatedRoot});
       $x->MaxPorts  ($session->var_bind_list()->{$dot1dBaseNumPorts});
       $x->TC_Time   ($session->var_bind_list()->{$dot1dStpTimeSinceTopologyChange});
     ##&print_results_cb($session);
  }
}
#################################################################
sub showinfo(){
    my ($session,$varname,$oid) = @_;
    my $format="%5d"; # Default format, if numeric
    my $val = $session->var_bind_list()->{$oid};
    if (length($val)> 5  or $val > 9999){
       return $varname . "=" . $val  . "; ";
    }
    return  $varname . "=" .
            sprintf("%6d",
                $val) . "; ";
}
###########################################