Here it is, adopted from perlipc, which has small typo ( die ... unless if... )

The server

#!/usr/bin/perl -Tw
use strict;
BEGIN { $ENV{PATH} = "/usr/bin:/bin" }
use Socket;
use Carp;
my $EOL = "\015\012";

sub logmsg { print "$0 $$: @_ at ", scalar localtime(), "\n" }

my $port  = shift || 2345;
die "invalid port" unless $port =~ /^ \d+ $/x;

my $proto = getprotobyname("tcp");

socket(Server, PF_INET, SOCK_STREAM, $proto)    || die "socket: $!";
setsockopt(Server, SOL_SOCKET, SO_REUSEADDR, pack("l", 1))    
                                                || die "setsockopt: $!
+";
bind(Server, sockaddr_in($port, INADDR_ANY))    || die "bind: $!";
listen(Server, SOMAXCONN)                       || die "listen: $!";

logmsg "server started on port $port";

my $paddr;

$SIG{CHLD} = \&REAPER;

for ( ; $paddr = accept(Client, Server); close Client) {
    my($port, $iaddr) = sockaddr_in($paddr);
    my $name = gethostbyaddr($iaddr, AF_INET);

    logmsg "connection from $name [",
            inet_ntoa($iaddr), "]
            at port $port";
            
    print Client prelen( "Hello there, $name, it's now ", scalar local
+time(), $EOL );
    print Client prelen( 'backslash \n__'."\n" );
    print Client prelen( 'backslash \r\n'."\r\n" );
    print Client prelen( 'backslash EOL_'.$EOL );
}
sub prelen {
    my $str = join '',@_;
    my $len = length $str;
    return "($len+6)$str";
}
[download]

And the client

#!/usr/bin/perl -w
use strict;
use Socket;
my ($remote, $port, $iaddr, $paddr, $proto, $line);

$remote  = shift || "localhost";
$port    = shift || 2345;  # random port
if ($port =~ /\D/) { $port = getservbyname($port, "tcp") }
die "No port" unless $port;
$iaddr   = inet_aton($remote)       || die "no host: $remote";
$paddr   = sockaddr_in($port, $iaddr);

$proto   = getprotobyname("tcp");
socket(SOCK, PF_INET, SOCK_STREAM, $proto)  || die "socket: $!";
connect(SOCK, $paddr)               || die "connect: $!";
binmode SOCK or die "binmode $!"; ## no effect on client side
while ($line = <SOCK>) {
    my $length = length $line;
    print "($length)$line";
}
close (SOCK)                        || die "close: $!";
exit(0);

__END__
$ perl client.pl
(65)(59+6)Hello there, localhost, it's now Wed Sep 14 03:53:10 2011
(21)(15+6)backslash \n__
(22)(16+6)backslash \r\n
(22)(16+6)backslash EOL_
[download]

The output from client

(65)(59+6)Hello there, localhost, it's now Wed Sep 14 03:53:10 2011
(21)(15+6)backslash \n__
(22)(16+6)backslash \r\n
(22)(16+6)backslash EOL_

The odd man out is the lone \n, it doesn't become \r\n

The strings are all the same size except for the line endings, with \n remaining \012 and \r remaining \015

So the documentation is correct

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