Inconsistent reason code between SUBACK and UNSUBACK

[Takatoshi Kondo <redboltz@gmail.com>]

Hi,

According to

3.9.3 SUBACK Payload
Table 3â8 - Subscribe Reason Codes
https://docs.oasis-open.org/mqtt/mqtt/v5.0/os/mqtt-v5.0-os.html#_Toc3901178

SUBACK reason code has the following values:

158 Shared Subscriptions not supported
161 Subscription Identifiers not supported
162 Wildcard Subscriptions not supported

On the contrary, UNSUBACK doesn't have them.

3.11.3 UNSUBACK Payload
Table 3â9 - Unsubscribe Reason Codes
https://docs.oasis-open.org/mqtt/mqtt/v5.0/os/mqtt-v5.0-os.html#_Toc3901194

It is reasonable that UNSUBACK doesn't have "Subscription Identifiers
not supported" because UNSUBSCRIBE cannot have Subscription Identifier
property.

However, UNSUBSCRIBE could have $shhare/sharename, and wildcards. So
UNSUBACK should have the following reason code:

158 Shared Subscriptions not supported
162 Wildcard Subscriptions not supported

Any ideas?

----
Thanks,
Takatoshi