[OASIS Issue Tracker] (MQTT-568) Authentication

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    [ https://issues.oasis-open.org/browse/MQTT-568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=78201#comment-78201 ] 

Ian Craggs commented on MQTT-568:
---------------------------------

The MQTT 5.0 AUTH packet also has a reason code byte, so we should also include that before the authentication method and data.  

3.15.2.1 Authenticate Reason Code

Byte 0 in the Variable Header is the Authenticate Reason Code. The values for the one byte unsigned Authenticate Reason Code field are shown below. The sender of the AUTH Packet MUST use one of the Authenticate Reason Codes [MQTT-3.15.2-1].

||Value||Hex||Reason Code Name||Sent by||Description||
| 0  |  0x00 | Success | Server | Authentication is successful |
| 24 | 0x18 | Continue authentication | Client or Server | Continue the authentication with another step | 
| 25 | 0x19 | Re-authenticate | Client | Initiate a re-authentication |



> Authentication
> --------------
>
>                 Key: MQTT-568
>                 URL: https://issues.oasis-open.org/browse/MQTT-568
>             Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
>          Issue Type: Improvement
>          Components: MQTT-SN
>    Affects Versions: MQTT-SN-1.2
>            Reporter: Ian Craggs
>            Assignee: Ian Craggs
>            Priority: Major
>
> Authentication has been raised as an important omission.Â
> Mirroring the MQTT 5.0 AUTH packet seems like a good idea.



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