I already started to work on my project. Now, I’m studying how to do the configuration negotiation.  Today, only L2CAP  Basic mode is supported, so the configuration process is too easy, if  a the device try to use another mode, BlueZ stack will response that only supports Basic mode. Now with L2CAP Enhanced Retransmission mode(ERTM) the devices will need negotiate if they will use ERTM or Basic Mode. This week I’ll start to implement this.

That is the first part of my project, after  I’ll really implement ERTM.  The project will add support for two new frames types, I-frames and S-frames.  I-frames transmit all the data and S-frame are used to transmit specific protocol information – like ask to other device to resend some packet.

BlueZ:
If you wanna see all the projects accepted by BlueZ go to Vudentz’s blog, among them is my friend João Paulo Rechi Vita, also from Unicamp, with A2DP sink role.

That’s all, folks.

UPDATE: I said in the first version of this post that the first part of the project is to add ERTM to features mask. I was wrong. I can do that only when I finish all  ERTM implementation. To test ERTM Marcel has created a module parameter to enable ERTM.

ps: if you find errors in my English, please tell me, I’m learning yet. =)