sub_update_beacon_observation() function

Get the network flags of the given Subnet.

Process a Key Refresh event from a beacon.

Delete a Subnet. Removes the Subnet with the given network index from the node. The node will stop sending Network Beacons with the given Subnet, and can no longer process messages on this Subnet. All Applications bound to this Subnet are also deleted.

Get the next valid Subnet. If there's only one valid Subnet, this will be returned on every call.

Resolve the message encryption keys, given a message context. Will use the @c ctx::app_idx and @c ctx::net_idx fields to find a pair of message encryption keys. If @c ctx::app_idx represents a device key, the @c ctx::net_idx will be used to determine the net key. Otherwise, the @c ctx::net_idx parameter will be ignored.

Check whether the Subnet has the refreshed keys.