in reply to multithreading solution to the below problem

Consider using Net::Ping with the 'syn' protocol (and ->ack()</c> method) to overlap your pings. It's far more efficient than a multithreaded solution, and easier to write.

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Re^2: multithreading solution to the below problem
by rookie8278 (Initiate) on Jun 25, 2009 at 08:31 UTC
    hey there..thanks for ur reply...pardon me for my lack of knowledge on perl, i did not completely get ur answer :-O let me rephrase, if there are IP1,IP2,...IP255 alive machines in a subnet, the current way of doing is, wait for scan of IP1 to complete and then start scan of IP2 and so on,This takes a lot of time to complete the scan, i am looking into ways where i can send a scan request to more than one machine simultaneously, Does your answer cover this..can u please elaborate.
[reply]

      Have you read Net::Ping? It describes how you can ping multiple hosts without even needing threads. Please just read Net::Ping and ask specific questions after you've done so. The relevant example from the Net::Ping documentation is:

      # Like tcp protocol, but with many hosts
    $p = Net::Ping->new("syn");
    $p->port_number(getservbyname("http", "tcp"));
    foreach $host (@host_array) {
      $p->ping($host);
    }
    while (($host,$rtt,$ip) = $p->ack) {
      print "HOST: $host [$ip] ACKed in $rtt seconds.\n";
    }

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[d/l]
        Thanks Corion
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