Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

This allows the application to be notified of changes to the connection
interval, connection latency and supervision timeout.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

This widens the characteristic/descriptor flags to 16-bit, to allow setting
encryption/authentication requirements.

Sets the required flags for NimBLE and btstack implementations.

The BLE.FLAG_* constants will eventually be deprecated in favour of copy
and paste Python constants (like the IRQs).

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

Instead of returning None/bool from the IRQ, return None/int (where a zero
value means success).  This mirrors how the L2CAP_ACCEPT return value
works.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

Enable it on STM32/Unix NimBLE only (pairing/bonding requires synchronous
events and full bindings).

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

This allows the application to be notified if any of encrypted,
authenticated and bonded state change, as well as the encryption key size.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

This allows setting the security and MITM-protection requirements.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

This adds `_IRQ_GET_SECRET` and `_IRQ_SET_SECRET` events to allow the BT
stack to request the Python code retrive/store/delete secret key data.  The
actual keys and values are opaque to Python and stack-specific.

Only NimBLE is implemented (pending moving btstack to sync events).  The
secret store is designed to be compatible with BlueKitchen's TLV store API.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

Rather than dealing with the different int types, just pass them all as a
single array of mp_int_t with n_unsigned (before addr) and n_signed (after
addr).

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

This provides a workaround for
apache/mynewt-nimble#887.

Without this, all devices would share a fixed default IRK.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

Signed-off-by: Damien George <damien@micropython.org>