#!/usr/bin/perl
use warnings;
use strict;
use IO::Socket;


my $SM = "\xfe";
my $ADRDSTN= "\x00\x09\x01\x00";
my $ADRSRC= "\x00\x08\x01\x00";
my $MID= "\x01";
my $MDLH= "\x00";
my $MDLL= "\x18";
my $SUBMID= "\x00";
my $CHreq= "\x00\x61";
my $Pity= "\xFF\x05";
my $Flags= "\x00\x20";
my $Timeout= "\x00\x00";
my $Level= "\x00\x00";
my $NumOfSrcEl= "\x01";
my $SrcEl= "\x00\xFF\x00\x84\x10\x00";
my $NumOfDstnEl= "\x01";
my $DstnEl= "\x08\x10\x00\x01\x01";
my $Rsvd= "\x00";
my @message= $ADRDSTN . $ADRSRC . $MID .$MDLH . $MDLL
           . $SUBMID . $CHreq . $Pity .$Flags . $Timeout
           . $Level . $NumOfSrcEl . $SrcEl . $NumOfDstnEl
           . $DstnEl . $Rsvd;
my $EM= "\xfd";


my $count=0;
$count += $message[$_] for 0..@message-1 ;
$count = 256 - ($count % 256);
my $CHECKSUM= chr( $count );
my @VPAP= $SM . @message . $CHECKSUM . $EM;

print  @VPAP,"\n";