Hello I am trying to programmatically(C++) find the Gateway IP and DNS Server IP and their MAC address of a local network. Do you have any suggestions on how to do that? Also is there a way to do it using WinPcap? Code samples would be great.
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Since you mentioned winpcap I conclude that you are on Windows. Thus you need WinAPI to retrieve your info.
Take a look at Retrieving Information Using GetNetworkParams article it contains all steps you need to get what you want.
P.S.: There’s nothing to do with winpcap though.