Sounds like a system call to nmap might do what you want.   (code) MAC n' IP cheese shows how I did something somewhat similar using nmap and Net::Ping.

http://www.insecure.org/nmap/

    cheers,
    Don
    bumbling toward Perl Adept
    (it's pronounced "why-bick")

In reply to Re: Using Net::Ping for broadcast address (nmap -sP a.b.c.d/mask) by ybiC
in thread Using Net::Ping for broadcast address by birdbrane

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