How to drop packet Using C++?

[Paul McKenzie]

Hi Sir .
Not so
I will have a list of banned IP, In my LAN, the packet if the same destination IP in banned list, drop the packet

I don't think you will get an answer here on an open board such as this one, regardless of your intent. It's similar to someone asking "how do I prevent someone from stopping a running process" or "how do I get a process to always restart when someone kills the process". The person that asks these types of questions may not have bad intentions, but posting code to do such things can easily be taken by someone to create their own malicious applications.

Regards,

Paul McKenzie