Is it easy to write an program to make FreeBSD supoort Headset ?

[zhengzhi]

Hi.
      I want to use my headset in FreeBSD now. I 've read some documents about 
bluetooth , headset profile .Headset Control is the higher level layer of  
SDP and RFCOMM ,and not complex.FreeBSD supports SDP and RFCOMM. 
  So What I have to do is  implement the Headset Control layer and wrap it as 
a audio device ?