Network server users can use external an Join Server to authenticate OTAA Join requests.
Extract from the Join Server response (called AppSKey answer) can be forwarded by the network server to the application server, including the encrypted newly generated AppSKey.
|string||identifies type of message, always 'AppSKeyAns' for AppSKey answer|
|string||version of the protocol|
|string||device EUI, 16 hex digits (without dashes)|
|string||"Success" on success, error string otherwise|
|string||Detailed information related to the ResultCode (optional)|
|string||identifier of the key wrapping algorithm|
|string||encrypted AES key|
|string||Identifier of the key session id (join session id)|