[MQTT-535] CONNACK property length should be optional - OASIS Technical Committees Issue Tracker

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Type: Improvement
Status: Deferred
Priority: Minor
Resolution: Unresolved
Affects Version/s: 5, CSD02
Fix Version/s: None
Component/s: futures
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Public comment from Tatsuzo Osawa

Regarding 3.2.2.3.1 (CONNACK) Property Length,
I'd like to add "If the Remaining Length is 2 there is no Property
Length and the value of 0 is used."

Because, all other messages without payload has similar statement.
Only CONNACK has not. In addition, treating the property length as
optional helps interoperability with the former version.

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Public comment from Tatsuzo Osawa Regarding 3.2.2.3.1 (CONNACK) Property Length, I'd like to add "If the Remaining Length is 2 there is no Property Length and the value of 0 is used." Because, all other messages without payload has similar statement. Only CONNACK has not. In addition, treating the property length as optional helps interoperability with the former version.

Proposal:

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If we decide to make this change, add the following sentence to the end of the single paragraph in section 3.3.3.2.1 Property Length (within CONNACK):

If the Remaining Length is less than 3 there is no Property Length and the value of 0 is used.

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If we decide to make this change, add the following sentence to the end of the single paragraph in section 3.3.3.2.1 Property Length (within CONNACK): If the Remaining Length is less than 3 there is no Property Length and the value of 0 is used.