Apologies, client code was a bit wrong.
use strict;
use IO::Socket;
my $ITER = 10;
my $forward_socket = IO::Socket::INET->new(
Proto => 'tcp',
PeerAddr => "localhost",
PeerPort => 12345,
# Timeout => 10,
) or die $!;
for (my $i = 0; $i < $ITER; $i++) {
print "Sending test $i\n";
$forward_socket->print("yyyyyyyyyyyyyyyyyyyyyyyyyyyy\n");
my $resp = $forward_socket->getline
or print "ERROR $!\n";
print "Received $resp\n";
}