use strict;
use warnings;
use autodie;
use IO::Socket::INET;

my $PORT = 53123;

while () {
    my $sock = new IO::Socket::INET(
        PeerHost => '127.0.0.1',
        PeerPort => $PORT,
        Proto    => 'tcp',
    ) or die;
    binmode $sock;
    print $sock '123';
    $sock-> close;
    select( undef, undef, undef, 0.01 )
}