[Bluez-users] running 2 rfcomm modules simultaneously

[Bluez-users] running 2 rfcomm modules simultaneously

[David Mackie]

Is it possiable to have two rfcomm modules loaded at the same time, each one
with a different PSM values? What I was attempting to do was to modify
rfcomm/core.c and recompile it into a new module, but it seems it is not as
simple as that as can be seen by this kernel Oops while unloading the
module.

Sep  1 01:16:12 warped l2cap_sock_kill: sk deec6380 state 9
Sep  1 01:16:12 warped l2cap_sock_destruct: sk deec6380
Sep  1 01:16:12 warped Unable to handle kernel NULL pointer dereference at
virtual address 00000004
Sep  1 01:16:12 warped printing eip:
Sep  1 01:16:12 warped c020496e
Sep  1 01:16:12 warped *pde = 00000000
Sep  1 01:16:12 warped Oops: 0002 [#1]
Sep  1 01:16:12 warped PREEMPT 

Has anyone done something like this before?

Thanks,

Dave



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Re: [Bluez-users] running 2 rfcomm modules simultaneously

[Marcel Holtmann]

Hi David,

> Is it possiable to have two rfcomm modules loaded at the same time, each one
> with a different PSM values? What I was attempting to do was to modify
> rfcomm/core.c and recompile it into a new module, but it seems it is not as
> simple as that as can be seen by this kernel Oops while unloading the
> module.
> 
> Sep  1 01:16:12 warped l2cap_sock_kill: sk deec6380 state 9
> Sep  1 01:16:12 warped l2cap_sock_destruct: sk deec6380
> Sep  1 01:16:12 warped Unable to handle kernel NULL pointer dereference at
> virtual address 00000004
> Sep  1 01:16:12 warped printing eip:
> Sep  1 01:16:12 warped c020496e
> Sep  1 01:16:12 warped *pde = 00000000
> Sep  1 01:16:12 warped Oops: 0002 [#1]
> Sep  1 01:16:12 warped PREEMPT 
> 
> Has anyone done something like this before?

this is not possible this way. It needs more changes to provide such a
functionality and you must keep it inside the RFCOMM module. Why do you
need it?

Regards

Marcel




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Re: [Bluez-users] running 2 rfcomm modules simultaneously

[David Mackie]

On Sun 2004-09-12 (16:08), Marcel Holtmann wrote:
> > Has anyone done something like this before?
> 
> this is not possible this way. It needs more changes to provide such a
> functionality and you must keep it inside the RFCOMM module. Why do you
> need it?

I had hoped to be able to "pick-up" data sent to the 2nd RFCOMM Module
(using a new PCM value to differentiate it from the "Original") and pass it to
another program to transport it across the network to another PC where it
would be "injected" into a modified module there. At the moment, I am only
loading the modified module, and it not absolutely necessary that both be
loaded at a time, but would be interesting to do.

-dave

-- 
 David Mackie
 MSc Student - Computer Science -  Rhodes University
 email: D.Mackie@ru.ac.za
   web: http://www.cs.ru.ac.za/research/students/g99m0302/


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Re: [Bluez-users] running 2 rfcomm modules simultaneously

[Marcel Holtmann]

Hi David,

> > this is not possible this way. It needs more changes to provide such a
> > functionality and you must keep it inside the RFCOMM module. Why do you
> > need it?
> 
> I had hoped to be able to "pick-up" data sent to the 2nd RFCOMM Module
> (using a new PCM value to differentiate it from the "Original") and pass it to
> another program to transport it across the network to another PC where it
> would be "injected" into a modified module there. At the moment, I am only
> loading the modified module, and it not absolutely necessary that both be
> loaded at a time, but would be interesting to do.

I don't really understand what you are trying to achieve, but I think
you should try it without putting RFCOMM on another PSM.

Regards

Marcel




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