[Bluez-users] Delete, write and read link keys using functions in hci.c

["Staale A. Kleppe" <stale.kleppe@gmail.com>]

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Good atfernoon (or morning depending on your whereabouts)!

Working on my Master's I want to be able to delete, write and read the link
keys associated with a paired device. I found the functions

int hci_read_stored_link_key(int dd, bdaddr_t *bdaddr, uint8_t all, int to)
int hci_write_stored_link_key(int dd, bdaddr_t *bdaddr, uint8_t *key, int
to)
int hci_delete_stored_link_key(int dd, bdaddr_t *bdaddr, uint8_t all, int
to)

in hci.c and tried to use the delete-function. It seems to work, as the
function call returns 0, indicating that no problems occured. However, the
link key still appears in /var/libs/bluetooth/BD_ADDR/linkkeys, and a
following authentication is still successfull.
Hcidump reports this:
< HCI Command: Delete Stored Link Key (0x03|0x0012) plen 7
    bdaddr 00:09:DD:60:02:45 all 0
> HCI Event: Command Complete (0x0e) plen 4
    Delete Stored Link Key (0x03|0x0012) ncmd 1
    status 0x11 deleted 2525
    Error: Unsupported Feature or Parameter Value

I guess it might be the value of parameter "all". I didn't know what it is,
so I tried with 0 and 1 (apperently not correct). Anyone knows what this
parameter of type uint8_t is for? I thought it might be like a "boolean"
variable, instructing deletion of ALL the associated link keys. Am I far
off?

Another thing, about the hci_read_stored_link_key function. Is the key
returned as an int-value or by some other means? I'm a bit confused about
this matter..

Any reply will be valued greetly.

Regards,
Staale A. Kleppe

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