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Subject: [OASIS Issue Tracker] (MQTT-574) Add reason code/string to the disconnect packet
[ https://issues.oasis-open.org/browse/MQTT-574?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Simon Johnson updated MQTT-574: ------------------------------- Proposal: Section should now read; 5.4.21 DISCONNECT ||Length||MsgType||SessionExpiryInterval||ReasonCode||ReasonString|| |(octet 0)|(1)|(2:5)|(6)|(7:n) The format of the DISCONNECT message is illustrated in Table 24: * Length and MsgType: see Section 5.2. * Session Expiry Interval: contains the value of the Session Expiry Interval timer; when the value of this field is non zero, it is deemed to be sent by a client that wants to go to the âasleepâ state, see Section 6.14 for further details. * ReasonCode: A code representing the reason for disconnection. * ReasonString: A string representing a clear text description of disconnection. ||Value||Reason Code||Sent by||Description|| |0|0x00|Client or Gateway|Normal disconnect| |1|0x01|Gateway|Congestion| |2-15|0x02-0x0F|Reserved|Reserved range| |16-255|0x10-0xFF|Client or Server|Custom disconnect codes| As with MQTT, the DISCONNECT message is sent by a client to indicate that it wants to close the connection. The gateway will acknowledge the receipt of that message by returning a DISCONNECT to the client. A server or gateway may also sends a DISCONNECT to a client, e.g. in case a gateway, due to an error, cannot map a received message to a client. Upon receiving such a DISCONNECT message, a client should try to setup the connection again by sending a CONNECT message to the gateway or server. A DISCONNECT message with a SessionExpiryInterval field is sent by a client when it wants to go to the âasleepâ state. The receipt of this message is also acknowledged by the gateway by means of a DISCONNECT message. was: New disconnect packet would look like, including the new KeepAlive field expansion ||Length||MsgType||SessionExpiryInterval||ReasonCode||ReasonString|| |(octet 0)|(1)|(2:5)|(6)|(7:n) > Add reason code/string to the disconnect packet > ----------------------------------------------- > > Key: MQTT-574 > URL: https://issues.oasis-open.org/browse/MQTT-574 > Project: OASIS Message Queuing Telemetry Transport (MQTT) TC > Issue Type: Improvement > Components: MQTT-SN > Affects Versions: MQTT-SN-1.2 > Reporter: Ian Craggs > Assignee: Simon Johnson > Priority: Major > > As in MQTT 5.0, the disconnect packet should contain a reason code, and perhaps a reason string so that the receiver has an explanation for the termination of the session. -- This message was sent by Atlassian Jira (v8.3.3#803004)
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