How to get ip's of available devices in LAN C++ windows

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Hello, I want to obtain a table of ip's that are reachable in LAN.
Something like method 2 in this article: Determine IP Address From a MAC Address[^]
And I need to do so using raw winsock2.h only.

What I have tried:

Pinging every single ip by given submask - this takes way too long.

And this this[^] tutorial, which doesn't compile for me.

EDIT:
I know tutorial above is c#. If anyone could tell me how to convert it to c++ correctly?

Posted 21-May-16 5:30am

Cansisti

Updated 21-May-16 6:08am

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Dave Kreskowiak 21-May-16 13:35pm

There are only two ways to know if a device is at an IP or not. One is to ping it, the other is to actively try to connect to it on every possible port, and even then it's not guaranteed that there is NOT a device at that IP.

The device could be setup to not respond to pings or it could be on the other side of a firewall or router filtering out such communication.

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