use 3g for internet when connected to adhoc wifi (using private API's)

Question

First and foremost, I am looking for a resource to use Private API's. this is an enterprise application and will never go to the app store I need to take as much configuration out of the users hands as possible.

That being said, I have a device that an ipad will be connected to and communicate with via an adhoc wifi network supplied by the device. the ipad connects to this device and sends raw data to it via socket connections. I also need to connect to the internet for data syncing.

80% of the time, the ipad will be connected to this adhoc wifi device. Management software on the ipad does not allow the user to adjust wifi settings so I am trying to make sure I am connected to my device without limiting my server syncing. I know I can determine the connection using apples Reachability class, this is not what i am looking for. I need to use BOTH 3g AND wifi.

Is there a way to enforce this in code? Or is there a resource for the private API's that I can look at to find a way?

This will be in iOS 5 and the most preferable method would be to just route my http requests via some private api method to use 3G and let the socket requests use wifi to the adhoc device.

code samples would be awesome, links / class names to research would be very much appreciated.

and once again this is not going into the app store, it is an enterprise app

Answer 1

the resolution i found was to assign an ip in the privately assigned ip range the ipad uses (169.254.x.x) to the adhoc device then let the ipad determine an ip. Then see if i can open a socket connection to the device (to determine if its available) and then issue a print.

Going this route, i am still able to use 3g data as well as communicate with the device via wifi.