[concurrency-interest] Creating a Set of pings

Dawid Kurzyniec dawidk at mathcs.emory.edu
Tue May 23 00:01:06 EDT 2006

robert lazarski wrote:
> Could someone please give some advice on these requirements?
> 1) Find all IP's on a given subnet that responds to ICMP  (ping). So 
> for say <> with a netmask of 
> <>, attempt a ping to 255 addresses. 
> In java  I believe I can use InetAddress.isReachable(timeout) .

Concurrency issues aside, you may want to try to include some measures 
to reduce the amount of generated network traffic (perhaps by using 
broadcast echo instead of the network scanning); otherwise you may run 
into a risk of having your application looking suspicious to security 
administrators. Perhaps see how services like Lisa 
(http://lisa-home.sourceforge.net/) do these things.


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