Re: [Bluez-users] HCI connection_handle

[Marcel Holtmann <marcel@holtmann.org>]

Hi Manjunath,

> I am trying to use the "hcitool cmd" options and i have to pass the
> connection_handle as a command parameter.
> root:]#hcitool  con
> < ACL 00:0B:0D:31:D1:BA handle 7 state 1 lm MASTER
> 
> Assuming the connection_handle to be 7, i tried to read the rssi value
> 
> root:]#hcitool cmd 0x05 0x0005 0x0007
> I get the following
> 
> < HCI Command: ogf 0x05, ocf 0x0005, plen 1
>   07
> > HCI Event: 0x0e plen 4
>   01 05 14 12
> 
> This means there is some error as i have got 12 instead of 00......
> 
> Can you tell me what the problem is??

the problem is that you should read the HCI specification if you wanna
play with the "hcitool cmd ..." call. The handle is a 16 bit value. And
btw error code 0x12 means invalid parameters.

However the RSSI can be read with "hcitool rssi ..." and this code also
does the handle lookup for you.

> 2) I tried using the test mode commands and I am simulatameously
> running the hcidump, which prints a unknown command type. I am just
> presuming that the commands might be working alright , only that
> hcidump doesn't decipher the test commands. Am i right??

What version of hcidump do you use? Show the undecoded output to us.

> 3) I was also trying to understand the hcitool.c code , can you tell
> me where the functions  "hci_for_each_device" and the like defined?

Actually you can do this by yourself. Look at the bluez-libs and
bluez-utils source code. Maybe using grep is a good idea ;)

Regards

Marcel




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