[Bluez-devel] Problem with security mode 3

[Marcel Holtmann <marcel@rvs.uni-bielefeld.de>]

Hi Max,

there is a little problem with local devices in security mode 3
(hciconfig hci0 auth). If you have already paired two devices, but you
have used your dongle within another OS and paired it again to the same
remote device. The local link key stored by the hcid is outdated. But
this can not be known by the hcid and so it sends it on the next
connection request. The remote device will deny the connection because
of the wrong link key, but the error you get is not an authentication
failure. You get the timeout error from the L2CAP layer.

	< HCI Command: Write Authentication Enable(0x03|0x0020) plen 1
	  01 
	> HCI Event: Command Complete(0x0e) plen 4
	  01 20 0C 00 
	< HCI Command: Create Connection(0x01|0x0005) plen 13
	  FD 06 81 0E 04 00 18 CC 01 00 00 00 01 
	> HCI Event: Command Status(0x0f) plen 4
	  00 01 05 04 
	> HCI Event: Link Key Request(0x17) plen 6
	  FD 06 81 0E 04 00 
	< HCI Command: Link Key Request Reply(0x01|0x000b) plen 22
	  FD 06 81 0E 04 00 38 06 D7 5D E2 DD FD 10 88 EF 5A 65 66 C2 
	  80 26 
	> HCI Event: Connect Complete(0x03) plen 11
	  05 00 00 FD 06 81 0E 04 00 01 00 

I have looked at hci_conn_complete_evt() and l2cap_connect_cfm() and the
code seems correct to me.

If you try to connect again after the timeout, you will get a "Operation
already in progress" error.

Where is the problem?

Regards

Marcel




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