I am building a network utility for OS X. I've gone through Apples documentation, but I cannot find the framework that allows my app to monitor incoming bytes. Can anybody point me in the right direction? Thank you for your time!
To get statistics on a network, you can use the sysctl system call. This is fairly thinly documented; there's another answer on StackOverflow that gives a brief example, and for more detail, I'd recommend looking at the netstat source code.