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Subject: [OASIS Issue Tracker] Commented: (MQTT-52) Handling permission problems
[ http://tools.oasis-open.org/issues/browse/MQTT-52?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=35084#action_35084 ]
Richard Coppen commented on MQTT-52:
------------------------------------
TC call 03.10.2013: TC agree to revise proposal and bring back to future TC call
> Handling permission problems
> ----------------------------
>
> Key: MQTT-52
> URL: http://tools.oasis-open.org/issues/browse/MQTT-52
> Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
> Issue Type: Improvement
> Components: core
> Affects Versions: 3.1.1
> Reporter: Richard Coppen
> Fix For: 3.1.1
>
>
> What should a server do if a client attempts to perform an operation that is disallowed?
> For example:
> 1. Attempts to publish to a topic for which they do not have permission
> The input specification (which is not based on RFC2119 terminology) provides ambiguous guidance for such a scenario.
> "Note that if a server implementation does not authorize a PUBLISH to be made by a client; it has no way of informing that client. It must therefore make a positive acknowledgement, according to the normal QoS rules, and the client will not be informed that it was not authorized to publish the message."
> This behavior is problematic (strictly enforced or not) since a valid client talking to a poorly configured server will continue to process work unaware of the problem. In practice it is very difficult, if not impossible, to write a client application with error handling and recovery logic to defend against it.
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