I partialy finished porting of Bluetooth stack from (Open/Net)BSD. Port include ubt driver, netbt (BT stack), bthub pseudo-dev, and userspace libs and progs such as libbluetooth(3), libsdp(3) and btconfig(8). I have some troubles related with unloading module and sometime detaching. I can't catch this bug. :( But, stack working for my dongle. Now I working on porting of another drivers, such as bthid(4), btsco(4), btuart and etc. with some userspace utils such as btdevctl(8) and btuartd(4). If so...