http://www.perlmonks.org?node_id=1012036


in reply to Re: I need Hex conversion, not!
in thread I need Hex conversion, not!

Try this, and when it works, think about why it works:

#!/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);
$CHECKSUM= chr( $count );
my $VPAP= $SM . $message . $CHECKSUM . $EM;

my $sock = new IO::Socket::INET(
    PeerAddr => 'localhost',
    PeerPort => '7070',
    Proto => 'tcp',
) or die "Could not create socket: $!\n";

print $sock $@VPAP; 
close($sock);

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With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

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Re^3: I need Hex conversion, not!
by Anonymous Monk on Jan 07, 2013 at 14:16 UTC

    Thanks for the help but when I run the code, it cannot calculate addition of members of @message

    Argument "\0^I^A\0\0^H^A\0^A\0^X\0\0aM-^?^E\0 \0\0\0\0^A\0M-^?\0M-^D..
+." isn't numeric in addition (+) at VPAP_test.pl line 32.
Wide character in print at VPAP_test.pl line 37.
þ1Äý

    [download]

    To be able to run it, I fixed some errors

    #!/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";

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[reply]
[d/l]
[select]

      Try:

      #!/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 += chr for split '', $message;
$count = 256 - ($count % 256);
$CHECKSUM= chr( $count );
my $VPAP= $SM . $message . $CHECKSUM . $EM;

my $sock = new IO::Socket::INET(
    PeerAddr => 'localhost',
    PeerPort => '7070',
    Proto => 'tcp',
) ordie "Could not create socket: $!\n";

print $sock $@VPAP;
close($sock);

      [download]
      With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
      Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
      "Science is about questioning the status quo. Questioning authority".
      In the absence of evidence, opinion is indistinguishable from prejudice.
      div class=
[reply]
[d/l]

        That did not change the results, it just made error messages more, each argument is printed out in one line now.

[reply]
      $count += $message[$_] for 0..@message-1 ;

      [download]

      Can you explain the intention of that line?

[reply]
[d/l]

        Sum of all values in @message array. Element number is @message may be different in each message ( not for this example )

[reply]

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