Other than UDP Broadcast or Multicast, what other methods can I use on a WiFI network to discover co

Posted by Gubatron on Stack Overflow See other posts from Stack Overflow or by Gubatron
Published on 2010-03-25T18:01:25Z Indexed on 2010/03/25 18:03 UTC
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networking

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discovery

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udp

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tcp

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wifi

I've implemented a simple ping/pong protocol to discover other computers connected to the same WiFI router.

This works fine on many routers, but it seems some public routers have UDP traffic blocked or disabled.

What other options do I have to discover the computers connected to the router?

I was thinking of brute forcing TCP attempts (trying to open connections to all possible IPs on my subnetwork) but this would be very costly and I would have to cycle several times and still not find every machine that's recently connected to the network.

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