add getTopicAliasMaximum() to software.amazon.awssdk.crt.mqtt5.packets.ConnAckPacket

[bgklika]

Describe the feature

At the moment class ConnAckPacket do not provide ability to read CONNACK topic alias maximum property (id 34 0x22).
I have tested another MQTT client on IoT Core and that property actually sent with value 8.

Please provide such method as well as parsing of 0x22 property from raw CONNACK data if missing.

Use Case

Any CRT or SDK-based MQTT client which topic alias feature.

Proposed Solution

Just add method and new Id in parser.

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

[bretambrose]

Topic aliasing is supported in the native client (https://github.com/awslabs/aws-c-mqtt/blob/v0.8.11/include/aws/mqtt/v5/mqtt5_client.h#L61-L166) but we didn't bind it out on initial MQTT5 release. I can see about squeezing in some binding work sometime in the near future.

[bgklika]

Hello Bret!

Please take on account for planning:

1. It is not a urgent request
2. request is only for topic alias maximum not for whole topic alias feature