lorawan interface connect method should return LORAWAN_CONNECT_IN_PROCESS when connnecting

[garycolecd]

Description

LoraWANInterface::connect returns LORAWAN_STATUS_OK when idle and entering connecting state. An asynchronous event is sent when connection completes or fails. If the stack is already connected the connect method also returns LORAWAN_STATUS_OK, but does not send an asynchronous event. The application cannot distinguish the two use cases without timing out waiting for the event.

Issue request type

The stack includes the LORAWAN_STATUS_CONNECT_IN_PROGESS result code, but it does not appear to be used in mbed-os-5.9.0. The connect method should return LORAWAN_STATUS_CONNECT_IN_PROGESS when it will notify the application with an event, and return LORAWAN_STATUS_OK when the stack is already connected.

[ ] Question
[X] Enhancement
[ ] Bug

[ciarmcom]

ARM Internal Ref: MBOTRIAGE-724

[hasnainvirk]

@garycolecd Please check the remedy for the issue. Thank you for your collaboration.
#7445. The change will take effect from Mbed OS 5.10 release. However, you can cherry-pick for your use whenever you wish.

[garycolecd]

Issue resolved with API changes, thanks.