To use this thing:

void handler(Socket s) { do something... }
auto manager = new ListeningConnectionManager("127.0.0.1", 80, &handler, &delegateThatDropsPrivileges);
manager.listen();

The 4th parameter is optional.

I suggest you use BufferedInputRange(connection) to handle the input. As a packet comes in, you will get control. You can just continue; though to fetch more.