Re: [Bluez-devel] HCI Forwarding

[Marcel Holtmann <marcel@holtmann.org>]

Hi,

> As you remember I was developing a gateway for tunneling the hci traffic
> over TCP and be able to transfer files and play bluetooth games at long
> distances.
> I wrote a simple and very rudimentary C++ test program but didn't work. I
> think the problem is the destination bluetooth address, would I need to
> parse
> the hci frames to set the bt address to its correct value?, I don't know
> how to do this, I am really lost.
> I tested the program with another friend running the same program with two
> nokia n-gage.
> 
> If you can help me here is the source code, please feel free to modify
> whatever
> you want and tell me how can I solve this problem or give me a new way of
> doing this.
> (I marked up the important part of the main loop so you can see the main
> idea witouth reading the full source), at the end is the program and hcidump
> output.
> 
> If you want the full source (all files and makefile) tell me.

using C++ is actually too much for such a project, because OO is useless
in this case and personally I don't like C++ and so I won't comment on
your code.

If you wanna do HCI forwarding then you must first use the HCI device in
raw mode and even then I don't think that this going to work. You must
map a lot of commands to events and vice versa. For example a connect
request from on side must result in a create connection on the other
side and then you must do the HCI flow control right.

And yes, you must do a BD_ADDR and also connection handle translation
for every command/event exchange. I am not sure if this will ever work,
but even if, it is a lot of work and you need a deep understanding of
the HCI.

Regards

Marcel




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