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Mosquitto MQTT Broker 2.0
New plugin interface which is more flexible, easier to develop for and easier to extend.
New dynamic security plugin, which allows clients, groups, and roles to be defined and updated as the broker is running.
Performance improvements, particularly for higher numbers of clients.
When running as root, if dropping privileges to the "mosquitto" user fails, then try "nobody" instead. This reduces the burden on users installing Mosquitto themselves.
Add support for Unix domain socket listeners.
bridge_outgoing_retainoption, to allow outgoing messages from a bridge to have the retain bit completely disabled, which is useful when bridging to e.g. Amazon or Google.
Add support for MQTT v5 bridges to handle the "retain-available" property being false.
Allow MQTT v5.0 outgoing bridges to fall back to MQTT v3.1.1 if connecting to a v3.x only broker.
DLT logging is now configurable at runtime with
log_destdlt. Closes #1735.
mosquitto_plugin_publish()function, which can be used by plugins to publish messages.
mosquitto_client_protocol_version()function which can be used by plugins to determine which version of MQTT a client has connected with.
mosquitto_kick_client_by_username()functions, which can be used by plugins to disconnect clients.
Add support for handling
$CONTROL/topics in plugins.
Add support for
Enabling certificate based TLS encryption is now through
Added support for controlling
UNSUBSCRIBEcalls in v5 plugin ACL checks.
Add "deny" acl type. Closes #1611.
The broker now sends the receive-maximum property for MQTT v5 CONNACKs.
bridge_max_packet_sizeoption. Closes #265.
bridge_bind_addressoption. Closes #1311.
TLS certificates for the server are now reloaded on
max_queued_messageshas been changed to 1000.
ciphers_tls1.3option, to allow setting TLS v1.3 ciphersuites. Closes #1825.
Bridges now obey MQTT v5
Add bridge support for the MQTT v5
Log client port on new connections. Closes #1911.
malformed-packetreason code on invalid
X509_free()must be called after using
mosquitto_client_certificate(). Closes #1842.
Fix listener not being reassociated with client when reloading a persistence file and
per_listener_settingstrue is set and the client did not set a username. Closes #1891.
Fix bridge sock not being removed from sock hash on error. Closes #1897.
mosquitto_passwordnow forbids the
:character. Closes #1833.
log_timestamp_formatnot applying to
log_desttopic. Closes #1862.
Fix crash on Windows if loading a plugin fails. Closes #1866.
Fix file logging on Windows. Closes #1880.
Report an error if the config file is set to a directory. Closes #1814.
Fix bridges incorrectly setting Wills to manage remote notifications when
notifications_local_onlywas set true. Closes #1902.