Perl 端口扫描的功能实现了有Bug。

不知道为什么停不下来，坑爹。。

#!/usr/bin/perl
use threads;
use Thread::Queue;
use Thread::Semaphore;
use Net::Ping;

# create queue
my $q=new Thread::Queue;
# read for check list
my @target=<>;
my $se_max = Thread::Semaphore->new( 100 );


foreach my $ip (@target){
   chomp($ip);
   foreach my $port(1..65535){
      $q->enqueue("$ip|$port");
   }
}
while(1){
  foreach(threads->list(threads::joinable))
  {
      $_->join();
  }

  my $item = $q->pending();

  if( $item == 0 )
  {
      my $active = threads->list(threads::running);
      if($active == 0)
      {
           print "全部跑完\n";
           last;
      }
      else
      {
           next;
      }
  }
  $se_max->down;
  threads->create(\&nex,$q->dequeue());
}
foreach(threads->list()){
   $_->join();
}

sub nex{
   local($tmp)=shift;
   @list=split(/\|/,$tmp);
   $scan=Net::Ping->new('syn');
   $scan->port_number($list[1]);
   $scan->ping($list[0]);
   if($scan->ack){
      print "ip:$list[0] port:$list[1] open\n";
   }
   $scan->close();
   $se_max->up;
}