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Subject: [OASIS Issue Tracker] (MQTT-547) Consider whether current length encoding is acceptable
[ https://issues.oasis-open.org/browse/MQTT-547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=76861#comment-76861 ] Allan Stockdill-Mander commented on MQTT-547: --------------------------------------------- No appetite to change this from the current specification > Consider whether current length encoding is acceptable > ------------------------------------------------------ > > Key: MQTT-547 > URL: https://issues.oasis-open.org/browse/MQTT-547 > Project: OASIS Message Queuing Telemetry Transport (MQTT) TC > Issue Type: Improvement > Components: MQTT-SN > Affects Versions: MQTT-SN-1.2 > Reporter: Ian Craggs > Priority: Major > > From 'suggestions for 1.3' comments. > The length encoding was extended for version 1.2 to support packets > 255 octets in length, in a backward compatible way. For packets of length > 255, the length field is 3 octets rather than optimally 2. > Some options: > 1) Always use 2 octets for the length > 2) Length field is 1 or 2 octets long. 0 to 6 in the first octet means there is a second octet. The length can be up to 6*256 + 255 (=1791). > 3) the MQTT algorithm, perhaps restricted to fewer octets. -- This message was sent by Atlassian Jira (v8.3.3#803004)
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