Perl

Send a 16-bit Integer over a Socket

Demonstrates Socket.SendInt16, which sends the low 16 bits of a value as a two-byte integer in the selected byte order.

Background. Fixed-size integers and length prefixes are common building blocks for application-defined binary protocols. Byte order is selectable, with big-endian being network byte order.

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Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

my $socket = Chilkat2::Socket->new;

# Connect to the server using TLS.
my $bTls = 1;
my $maxWaitMs = 5000;
my $success = $socket->Connect('example.com', 5000, $bTls, $maxWaitMs);
if (!$success) {
    print $socket->LastErrorText, "\n";
    exit;
}

# Send the low 16 bits of the value as a two-byte integer.  Use 1 for network byte order
# (big-endian) or 0 for little-endian.
my $bBigEndian = 1;
$success = $socket->SendInt16(1024, $bBigEndian);
if (!$success) {
    print $socket->LastErrorText, "\n";
    exit;
}

print "16-bit integer sent.\n";