#!/usr/bin/env perl

use strict;
use warnings;

use Parallel::ForkManager;
use MCE::Shared;
use IO::Socket;

my $in_file2 = 'rang.txt';
open( my $input,  "<", $in_file2 )  or die $!;
my $result = MCE::Shared->array;

my $manager = Parallel::ForkManager->new(20);
foreach my $ip (<$input>) {
    $manager->start and next;

    MCE::Shared->init(); # Optional
      # This is called automatically for threads, MCE, MCE::Hobo,
      # and MCE::Child. Calling MCE::Shared->init assigns a data
      # channel in a round-robin fashion to ForkManager workers.
      # Omitting init has the effect of 1 data channel versus 10.

    chomp($ip);
    my $host = IO::Socket::INET->new(
        PeerAddr => $ip,
        PeerPort => 80,
        proto    => 'tcp',
        Timeout  => 1
    );
    if ( defined $host ) {
        $result->push($ip);
    }
    $manager->finish;
}
$manager->wait_all_children;
close($input);

# move shared array to unshared array reference
$result = $result->destroy({ unbless => 1 });

open( my $output, ">", "port.txt" ) or die $!;
print {$output} "$_\n" for @{ $result };
close($output);