Bluetooth: ISO: Central security request
If the required_sec_level is lower than the
conn->sec_level, the central will now initialize the
security procecure to ensure that the CIS is encrypted
properly.
The algorithm implemented is as follows:
1) Check security levels for each (acl, iso) pair
2) For those with insufficient security,
call bt_conn_set_security
3) For those with sufficient security, connect the CIS
4) Once the ISO from 2) has been encrypted, connect the
CIS for the specific ACL
The idea behind this was to implement similar support
for autonomous encryption as we have for L2CAP.
It is more complex for ISO as we are dealing with
an array of (acl, iso) pairs, meaning more can go
wrong.
Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>
4 files changed
