#!/usr/bin/perl -w
#use strict;

use warnings;

use IO::Handle;

use Socket;

use threads;

use IO::Socket::INET;

use Net::Ping;




open(pctxt,'./pc.txt')||die "error open $!";
open(pc_log, ">./pclog.txt")||die "error open $!";
my $stime = time;
while($read_data = <pctxt>)
{
    #chomp;
    $read_data=~s/\s//g;
    $read_data=~s/" "//g;
    thread($read_data);
}
my $etime = time;
my $diff = $etime-$stime;
print "$diff \n";
close(pc_log);
close(pctxt);


##########################################

sub thread
{
    my $net = shift;
    my @ip = (1..255);
    my $port = 12345;
    my $thr0 = threads->new(\&scan, $net,@ip[0..15]);
    my $thr1 = threads->new(\&scan, $net,@ip[16..31]);
    my $thr2 = threads->new(\&scan, $net,@ip[32..47]);
    my $thr3 = threads->new(\&scan, $net,@ip[48..63]);
    my $thr4 = threads->new(\&scan, $net,@ip[64..79]);
    my $thr5 = threads->new(\&scan, $net,@ip[80..95]);
    my $thr6 = threads->new(\&scan, $net,@ip[96..111]);
    my $thr7 = threads->new(\&scan, $net,@ip[112..127]);
    my $thr8 = threads->new(\&scan, $net,@ip[128..143]);
    my $thr9 = threads->new(\&scan, $net,@ip[144..159]);
    my $thr10 = threads->new(\&scan, $net,@ip[160..175]);
    my $thr11 = threads->new(\&scan, $net,@ip[176..191]);
    my $thr12 = threads->new(\&scan, $net,@ip[192..207]);
    my $thr13 = threads->new(\&scan, $net,@ip[208..223]);
    my $thr14 = threads->new(\&scan, $net,@ip[224..239]);
    my $thr15 = threads->new(\&scan, $net,@ip[240..254]);
    $thr0->join();
    $thr1->join();
    $thr2->join();
    $thr3->join();
    $thr4->join();
    $thr5->join();
    $thr6->join();
    $thr7->join();
    $thr8->join();
    $thr9->join();
    $thr10->join();
    $thr11->join();
    $thr12->join();
    $thr13->join();
    $thr14->join();
    $thr15->join();
}


sub scan
{
    my ($net,@ip) = @_;
    foreach my $ip (@ip)
    {
      $host ="$net$ip";
      if (Is_Host_Alive($host))
      {
          my $socket = new IO::Socket::INET(
                PeerHost =>$host,
                PeerPort =>'12345',
                Proto    =>'tcp'
            );# or die "ERROR in Socket Creation : $!\n";
            if (($socket) && scan700($host))
            {
                print "$host not shutdown \n";
            }
        }
        #    $socket->close();
    }
}

sub scan700
{
    my ($ip) = @_;
  $host = "$ip";
  my $socket = new IO::Socket::INET(
            PeerHost =>$host,
            PeerPort =>'700',
            Proto    =>'tcp'
    );# or die "ERROR in Socket Creation : $!\n";
    if($socket)
        {
                print "$host is ATM \n";
                return 0;
        }
    #$socket->close();
    return 1;

}



sub Is_Host_Alive
{
    my ($host) = @_;
    my $tmp_icmp=Net::Ping->new('icmp');
    if(!$tmp_icmp->ping($host))
    {
           #print "$host ping unreachable \n";
        $tmp_icmp->close;
        return 0;
    }
    $tmp_icmp->close;
    return 1;
}
[download]

"pc.txt" file as following:
192.168.1.
192.168.2.
.....
192.168.150.
I want to check that whether so many net's hosts have been opened by port 12345 and not by port 700 or not.
Can you give me better advice for the result?