MQTT is een lichtgewicht netwerkprotocol dat berichten tussen apparaten uitwisselt. Het is gebaseerd op het zogenaamde publiceer-abonneerconcept. Eclipse Mosquitto is een opensource messagebroker die op zowel kleine IoT-apparaten als volwaardige servers gebruikt kan worden. Versie 2.0.22 is uitgekomen en de changelog daarvan kan hieronder worden gevonden.
Broker:Dynamic security plugin:
- Windows: Fix broker crash on startup if using `log_dest stdout`
- Bridge: Fix idle_timeout never occurring for lazy bridges.
- Fix case where max_queued_messages = 0 was not treated as unlimited. Closes #3244.
- Fix `--version` exit code and output. Closes #3267.
- Fix crash on receiving a $CONTROL message over a bridge, if per_listener_settings is set true and the bridge is carrying out topic remapping. Closes #3261.
- Fix incorrect reference clock being selected on startup on Linux. Closes #3238.
- Fix reporting of client disconnections being incorrectly attributed to "out of memory". Closes #3253.
- Fix compilation when using `WITH_OLD_KEEPALIVE`. Closes #3250.
- Add Windows linker file for the broker to the installer. Closes #3269.
- Fix Websockets PING not being sent on Windows. Closes #3272.
- Fix problems with secure websockets. Closes #1211.
- Fix crash on exit when using WITH_EPOLL=no. Closes #3302.
- Fix clients being incorrectly expired when they have keepalive == max_keepalive. Closes #3226, #3286.
Client library:
- Fix mismatch memory free when saving config which caused memory tracking to be incorrect.
Tests:
- Fix C++ symbols being removed when compiled with link time optimisation. Closes #3259.
- TLS error handling was incorrectly setting a protocol error for non-TLS errors. This would cause the mosquitto_loop_start() thread to exit if no broker was available on the first connection attempt. This has been fixed. Closes #3258.
- Fix linker errors on some architectures using cmake. Closes #3167.
- Fix 08-ssl-connect-cert-auth-expired and 08-ssl-connect-cert-auth-revoked tests when running on a single CPU system. Closes #3230.