This is the documentation for the latest (main) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

CONFIG_BT_SMP_USB_HCI_CTLR_WORKAROUND

Workaround for USB HCI controller out-of-order events

Type: bool

Help

This option enables support for USB HCI controllers that sometimes
send out-of-order HCI events and ACL Data due to using different USB
endpoints.
Enabling this option will make the master role not require the
encryption-change event to be received before accepting key-distribution
data.
It opens up for a potential vulnerability as the master cannot detect
if the keys are distributed over an encrypted link.

Direct dependencies

BT_TESTING && BT_SMP && BT_CONN && BT_HCI_HOST && BT_HCI && BT

(Includes any dependencies from ifs and menus.)

Defaults

No defaults. Implicitly defaults to n.

Kconfig definition

At subsys/bluetooth/host/Kconfig:347

Included via Kconfig:8Kconfig.zephyr:42subsys/Kconfig:9subsys/bluetooth/Kconfig:323

Menu path: (Top) → Sub Systems and OS Services → Bluetooth → Security Manager Protocol support

config BT_SMP_USB_HCI_CTLR_WORKAROUND
    bool "Workaround for USB HCI controller out-of-order events"
    depends on BT_TESTING && BT_SMP && BT_CONN && BT_HCI_HOST && BT_HCI && BT
    help
      This option enables support for USB HCI controllers that sometimes
      send out-of-order HCI events and ACL Data due to using different USB
      endpoints.
      Enabling this option will make the master role not require the
      encryption-change event to be received before accepting key-distribution
      data.
      It opens up for a potential vulnerability as the master cannot detect
      if the keys are distributed over an encrypted link.

(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)