I generally use Socket instead of the higher-level IO::Socket, but that's just my personaly preference. Here's some code to get you started. First the server:

use strict;
use Socket;

my $socket;      # the socket waiting for incoming connections
my $incoming;    # an incoming connection
my $port = 4000;
my $ipaddr = "localhost";
my $numConnections = 1;

socket($socket, PF_INET, SOCK_STREAM, getprotobyname('tcp'))
        || die "Could not create socket: $!\n";
bind($socket, sockaddr_in($port, inet_aton($ipaddr)))
        || die "Could not bind socket: $!\n";
listen($socket, $numConnections)
        || die "Could not listen on socket: $!\n";
accept($incoming, $socket)
        || die "Could not accept connection on socket: $!\n";

my $message;
my $messageLen = 999999;  # the maximum number of bytes to read off th
+e socket
defined(recv($incoming, $message, $messageLen, 0)) || die "Receive err
+or: $!";
print "I got the following message: $message.\n";
defined(send($incoming, "2", 0)) || die "Send error: $!";
shutdown($incoming, 2);
shutdown($socket, 2);
[download]

and now the client.

use strict;
use Socket;

my $socket;
my $port = 4000;
my $ipaddr = "localhost";

socket($socket, PF_INET, SOCK_STREAM, getprotobyname('tcp'))
    || die "Could not create socket: $!\n";
connect($socket, sockaddr_in($port, inet_aton($ipaddr)))
    || die "Could not connect: $!\n";

my $message;
my $messageLen = 999999; # the maximum number of bytes to read off the
+ socket

defined(send($socket, "1", 0)) || die "Send error: $!";
defined(recv($socket, $message, $messageLen, 0)) or die "Receive error
+: $!";
print "I got the following message: $message.\n";
shutdown($socket, 2);
[download]

Good luck!

-Ton
-----
Be bloody, bold, and resolute; laugh to scorn
The power of man...

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.