This header defines an API to register a function that will be called when the network stack is being initialized. This gives a kernel extensions an opportunity to install filters before sockets are created and network operations occur.
errno_t net_init_add( net_init_func_ptr init_func);
A pointer to a function to be called when the stack is initialized.
EINVAL - the init_func value was NULL. EALREADY - the network has already been initialized ENOMEM - there was not enough memory to perform this operation 0 - success
Add a function to be called during network initialization. Your kext must not unload until the function you register is called if net_init_add returns success.