[OASIS Issue Tracker] (MQTT-324) Consolidate list of optional server capabilities and review how they are signaled to the client

[OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>]

    [ https://issues.oasis-open.org/browse/MQTT-324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=64651#comment-64651 ] 

Andrew Banks commented on MQTT-324:
-----------------------------------

Here is my suggestion 

For the list of optional features
1    Maximum Qos
2    Retain supported
3    Maximum packet size
4    Wildcard subscriptions allowed
5    Topic alias maximum
6    Subscription Identifiers
7    Durable. Note this is presently done by the client sending CleanStart=true SessionExpiry=0 
      in CONNECT and the server setting sessionPresent=false in CONNACK.

For the preferred method of discovery
Flowed in the CONNECT/CONNACK



> Consolidate list of optional server capabilities and review how they are signaled to the client
> -----------------------------------------------------------------------------------------------
>
>                 Key: MQTT-324
>                 URL: https://issues.oasis-open.org/browse/MQTT-324
>             Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
>          Issue Type: Task
>          Components: core
>    Affects Versions: 5
>            Reporter: Shawn McAllister
>            Assignee: Rahul Gupta
>
> This jira is raised as a result of a decision from the Nov 17 TC:
> The action is to perform the following analysis to then determine if there should be technical changes to the specification::
> - create a consolidated list of optional server capabilities (eg. support for Retain, wildcard subscriptions, QoS2, subscription identifiers, etc)
> - document the current method by which a client learns of these capabilities for a given connection.
> - determine if the manner in which the client learns of these is adequate or should be changed to be more uniform, consistent, simple
> The intent is to ensure we do not have what appear to be randomly different ways of notifying the client of what is and is not supported for a given connection.
> Depending on the outcome of this analysis, normative or non-normative sections may be added to the specification



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