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Subject: [OASIS Issue Tracker] (MQTT-306) Clarify Handling of Malformed DISCONNECT command in WD04


     [ https://issues.oasis-open.org/browse/MQTT-306?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Brian Raymor updated MQTT-306:
------------------------------

    Fix Version/s: 5

> Clarify Handling of Malformed DISCONNECT command in WD04
> --------------------------------------------------------
>
>                 Key: MQTT-306
>                 URL: https://issues.oasis-open.org/browse/MQTT-306
>             Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
>          Issue Type: New Feature
>          Components: core
>    Affects Versions: wd04, 5
>            Reporter: Ed Briggs
>            Assignee: Andrew Banks
>              Labels: Proposed
>             Fix For: 5, wd10
>
>
> Proposed textual addition to WD04 following review of MQTT-270 (Server Initiated Disconnect) which has been closed.
> WD04 Section 3.14.1 describes the DISCONNECT command packet fixed header.   Line 1798 says
> "The Client or Server MUST validate that the reserved bits are set to zero and close the Network Connection if they are not zero."
> As a precaution I propose we should add
> "A Client or Server MUST NOT send a DISCONNECT in response to a malformed DISCONNECT."
> Rationale:  The DISCONNECT error table in table 3.13 includes values for  MALFORMED CONTROL PACKET and PROTOCOL ERROR.  Sending a DISCONNECT in response to a malformed DISCONNECT introduces the possibility of an endless cycle. (i.e. the two session partners disagree on the format of the disconnect and reject each others disconnects.) 



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