[Bluez-users] hciemu pb: can't set scan mode

[Bluez-users] hciemu pb: can't set scan mode

[Gigie Lertriniva]

Hi,

I created a fake Bluetooth device on my PC using
hciemu. I can see it with hciconfig, get its status to
"UP and RUNNING" but I fail to put it to PSCAN:

bash-2.05b# hciconfig hci1 pscan
Can't set scan mode on hci1. Invalid request code(56)

What could be a reason for this problem?

Gigie

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Re: [Bluez-users] hciemu pb: can't set scan mode

[Marcel Holtmann]

Hi Gigie,

> I created a fake Bluetooth device on my PC using
> hciemu. I can see it with hciconfig, get its status to
> "UP and RUNNING" but I fail to put it to PSCAN:
> 
> bash-2.05b# hciconfig hci1 pscan
> Can't set scan mode on hci1. Invalid request code(56)
> 
> What could be a reason for this problem?

the hciemu don't implements a full HCI. Only a limited number of
commands are supported. Look at the source code for details.

Regards

Marcel




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Re: [Bluez-users] hciemu pb: can't set scan mode

[Marcel Holtmann]

Hi Gigie,

> I'm learning how to write (in Java) applications which
> use Bluetooth to communicate. The simulator by
> Rococosoft is nice but is not free and it does not
> allow a simulated device to communicate with a real
> one. That's why I came to hciemu.
> I'm a newbie, I use Linux but I don't know what's
> going on inside exactly, and I can write Java programs
> but I don't know C too much. Yet I'm willing to learn
> and if possible to contribute.
> Since you seem to be an expert, I would appreciate
> your advices. My first question is: does "expanding"
> hciemu sounds like a reasonnable thing to do for my
> purpose or is there a nice Bluetooth emulator I
> haven't heard of? And my second question is: where do
> I start do add commands to hciemu? My friend suggested
> I read the book "Linux device drivers" by Rubini and
> Corbet. According to you, will that help me to
> understand the code of hciemu.c? One last question:
> what is the "scan_enable" method for (in the hciemu.c
> file)?
> I hope you'll be able to find some time to help me
> again. I realize I'm asking a lot but I think I just
> need to be put on tracks.

I don't really support hciemu in any way. If you want to extend it and
if you send me a patch I am going to apply it gladly, but that's the
only support I can offer to you.

Regards

Marcel




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