MQTT: Keep connection open for authz failures#15201
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michaelklishin merged 2 commits intomainfrom Jan 2, 2026
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Adjust mqtt disconnect comment Add a config option to toggle mqtt disconnect on unauthorized topic mqtt.disconnect_on_unauthorized=true(defualt) disconnect the clinet when publish or subscribe unauthorized topic. mqtt.disconnect_on_unauthorized=false subscribe unauthorized topic, reply SUBACK(non-authorized) and send retained messages for the successfully subscribed topics and keep connection. publish unauthorized topic, MQTT v5 and QoS1 reply with PUBACK including an error reason code and keep connection, MQTT v3 and QoS1 reply with PUBACK no error reason code and keep connection, QoS0 drop silently and keep connection. Add a config option to toggle mqtt disconnect on unauthorized topic mqtt.disconnect_on_unauthorized=true(defualt) disconnect the clinet when publish or subscribe unauthorized topic. mqtt.disconnect_on_unauthorized=false subscribe unauthorized topic, reply SUBACK(non-authorized) and send retained messages for the successfully subscribed topics and keep connection. publish unauthorized topic, QoS1 reply with PUBACK(non-authorized) and keep connection, QoS0 drop silently and keep connection.
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Per discussion with David: a |
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@iamdrq thank you for contributing. |
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(cherry picked from commit e1d147c)
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MQTT: Keep connection open for authz failures (backport #15201)
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This PR supersedes #15123.
The first commit contains the changes in #15123 contributed by @iamdrq .
The second commit contains some refactoring.