Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?
 
PerlMonks  

Re: I need Hex conversion, not!

by Anonymous Monk
on Jan 07, 2013 at 13:44 UTC ( #1012033=note: print w/ replies, xml ) Need Help??


in reply to I need Hex conversion, not!

Thanks for the replies, but how is it useful that using a number as string? Because I'm not sure about the results yet. The thing is, I'm trying to learn a new protocol that I should use it to give orders to a machine remotely. Also I need to calculate a variable so I need numeric values instead of strings.

#!/usr/bin/perl use warnings; use strict; use IO::Socket; my ($SM,@ADRDSTN,@ADRSRC,$MID,$MDLH,$MDLL,$SUBMID,@CHreq,@Pity,@Flags, +@Timeout,@Level,$NumOfSrcEl,@SrcEl,$NumOfDstnEl,@DstnEl,$Rsvd,@messag +e,$CHECKSUM,$EM); $SM = 0xfe; @ADRDSTN= (0x00, 0x09, 0x01, 0x00); @ADRSRC= (0x00, 0x08, 0x01, 0x00); $MID= 0x01; $MDLH= 0x00; $MDLL= 0x18; $SUBMID= 0x00; @CHreq= (0x00, 0x61); @Pity= (0xFF, 0x05); @Flags= (0x00, 0x20); @Timeout= (0x00, 0x00); @Level= (0x00, 0x00); $NumOfSrcEl= 0x01; @SrcEl= (0x00, 0xFF, 0x00, 0x84, 0x10, 0x00); $NumOfDstnEl= 0x01; @DstnEl= (0x08, 0x10, 0x00, 0x01, 0x01); $Rsvd= 0x00; @message= (@ADRDSTN,@ADRSRC,$MID,$MDLH,$MDLL,$SUBMID,@CHreq,@Pity,@Fla +gs,@Timeout,@Level,$NumOfSrcEl,@SrcEl,$NumOfDstnEl,@DstnEl,$Rsvd); $EM= 0xFD; my $count=0; $count += $message[$_] for 0..@message-1 ; $count = 256 - ($count % 256); $CHECKSUM=$count; my @VPAP=($SM,@message,$CHECKSUM,$EM); my $sock = new IO::Socket::INET ( PeerAddr => 'localhost', PeerPort => '7070', Proto => 'tcp', ); die "Could not create socket: $!\n" unless $sock; print $sock @VPAP; close($sock);


Comment on Re: I need Hex conversion, not!
Download Code
Re^2: I need Hex conversion, not!
by moritz (Cardinal) on Jan 07, 2013 at 13:48 UTC
Re^2: I need Hex conversion, not!
by BrowserUk (Pope) on Jan 07, 2013 at 14:05 UTC

    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);

    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.

      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. þ1ý

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

        Can you explain the intention of that line?

        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);

        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=

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1012033]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others musing on the Monastery: (8)
As of 2014-12-21 13:55 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    Is guessing a good strategy for surviving in the IT business?





    Results (105 votes), past polls