the Linux (BlueZ) API.
- L2CAP or RFCOMM connections can require the baseband radio link
mode be any of:
authenticated (devices are paired)
encrypted (implies authentication)
secured (encryption, plus generate new link key)
- for sockets, the mode is set using setsockopt(2) and the socket
connection will be aborted if the mode change fails.
- mode settings will be applied during connection establishment, and
for safety, we enter a wait state and will only proceed when the mode
settings are successfuly set.
- It is possible to change the mode on already open connections, but
not possible to guarantee that data already queued (from either end)
will not be delivered. (this is a feature, not a bug)
- bthidev(4) and rfcomm_sppd(1) support "auth", "encrypt" and
"secure" options
- btdevctl(8) by default enables "auth" for HIDs, and "encrypt" for
keyboards (which are required to support it)
remove pseudo-device btdev(4) and inherent limitations
add bthub(4) which autoconfigures at bluetooth controllers as they
are enabled. bluetooth devices now attach here.
btdevctl(8) and its cache is updated to handle new semantics
etc/rc.d/btdevctl is updated to configure devices from a list
in /etc/bluetooth/btdevctl.conf
Provide an ioctl to set the SCO mtu value in the controller and
place limits in the SCO code such that only packets of this size
may be sent.
Move the mtu option from btsco(4) and btdevctl(8), to the
btconfig(8) program.
Remove temporary BLUETOOTH_SCO kernel option, and enable SCO
socket access.
Fix incoming connection handling for btsco(4) and SCO sockets.
Fix documentation to reflect the new world order.
plunky